java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplTransformed.xml -s ../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_k.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d769cf3 [2018-10-15 15:23:37,213 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-15 15:23:37,215 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-15 15:23:37,232 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-15 15:23:37,233 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-15 15:23:37,235 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-15 15:23:37,238 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-15 15:23:37,241 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-15 15:23:37,243 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-15 15:23:37,249 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-15 15:23:37,250 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-15 15:23:37,251 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-15 15:23:37,252 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-15 15:23:37,255 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-15 15:23:37,258 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-15 15:23:37,259 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-15 15:23:37,260 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-15 15:23:37,264 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-15 15:23:37,268 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-15 15:23:37,274 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-15 15:23:37,276 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-15 15:23:37,277 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-15 15:23:37,279 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-15 15:23:37,279 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-15 15:23:37,279 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-15 15:23:37,280 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-15 15:23:37,282 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-15 15:23:37,283 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-15 15:23:37,284 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-15 15:23:37,285 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-15 15:23:37,285 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-15 15:23:37,286 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-15 15:23:37,288 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf [2018-10-15 15:23:37,298 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-15 15:23:37,298 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-15 15:23:37,299 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-15 15:23:37,299 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-15 15:23:37,299 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-15 15:23:37,299 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-15 15:23:37,300 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-15 15:23:37,300 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-15 15:23:37,301 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-15 15:23:37,301 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-15 15:23:37,301 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-15 15:23:37,301 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-15 15:23:37,301 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-15 15:23:37,302 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-15 15:23:37,302 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-15 15:23:37,345 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-15 15:23:37,361 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-15 15:23:37,368 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-15 15:23:37,370 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-15 15:23:37,371 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-15 15:23:37,371 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_k.i_3.bpl [2018-10-15 15:23:37,372 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_k.i_3.bpl' [2018-10-15 15:23:37,423 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-15 15:23:37,425 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-15 15:23:37,426 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-15 15:23:37,426 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-15 15:23:37,426 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-15 15:23:37,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 03:23:37" (1/1) ... [2018-10-15 15:23:37,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 03:23:37" (1/1) ... [2018-10-15 15:23:37,462 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 03:23:37" (1/1) ... [2018-10-15 15:23:37,463 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 03:23:37" (1/1) ... [2018-10-15 15:23:37,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 03:23:37" (1/1) ... [2018-10-15 15:23:37,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 03:23:37" (1/1) ... [2018-10-15 15:23:37,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 03:23:37" (1/1) ... [2018-10-15 15:23:37,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-15 15:23:37,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-15 15:23:37,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-15 15:23:37,471 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-15 15:23:37,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 03:23:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-15 15:23:37,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-15 15:23:37,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-15 15:23:37,791 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-15 15:23:37,791 INFO L202 PluginConnector]: Adding new model count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:23:37 BoogieIcfgContainer [2018-10-15 15:23:37,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-15 15:23:37,792 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2018-10-15 15:23:37,792 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2018-10-15 15:23:37,794 INFO L276 PluginConnector]: IcfgTransformer initialized [2018-10-15 15:23:37,810 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:23:37" (1/1) ... [2018-10-15 15:23:37,827 WARN L219 ansformationObserver]: HeapSeparator: input icfg has no '#valid' array -- returning unchanged Icfg! [2018-10-15 15:23:37,867 INFO L202 PluginConnector]: Adding new model count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 15.10 03:23:37 BasicIcfg [2018-10-15 15:23:37,867 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2018-10-15 15:23:37,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-15 15:23:37,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-15 15:23:37,877 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-15 15:23:37,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 03:23:37" (1/3) ... [2018-10-15 15:23:37,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26abd8f2 and model type count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:23:37, skipping insertion in model container [2018-10-15 15:23:37,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:23:37" (2/3) ... [2018-10-15 15:23:37,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26abd8f2 and model type count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 03:23:37, skipping insertion in model container [2018-10-15 15:23:37,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 15.10 03:23:37" (3/3) ... [2018-10-15 15:23:37,882 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_k.i_3.bplleft_unchanged_by_heapseparator [2018-10-15 15:23:37,895 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-10-15 15:23:37,909 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-15 15:23:37,943 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-15 15:23:37,982 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-15 15:23:37,983 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-15 15:23:37,983 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-15 15:23:37,983 INFO L384 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-10-15 15:23:37,983 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-15 15:23:37,984 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-15 15:23:37,984 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-15 15:23:37,984 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-15 15:23:37,984 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-15 15:23:37,999 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-10-15 15:23:38,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-15 15:23:38,009 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:23:38,010 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:23:38,011 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:23:38,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:23:38,018 INFO L82 PathProgramCache]: Analyzing trace with hash -557428637, now seen corresponding path program 1 times [2018-10-15 15:23:38,086 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:23:38,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:23:38,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:23:38,456 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-15 15:23:38,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-10-15 15:23:38,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-15 15:23:38,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-15 15:23:38,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-10-15 15:23:38,480 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 7 states. [2018-10-15 15:23:38,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:23:38,903 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-15 15:23:38,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-15 15:23:38,905 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2018-10-15 15:23:38,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:23:38,917 INFO L225 Difference]: With dead ends: 25 [2018-10-15 15:23:38,917 INFO L226 Difference]: Without dead ends: 21 [2018-10-15 15:23:38,920 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-10-15 15:23:38,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-15 15:23:38,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-15 15:23:38,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-15 15:23:38,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-15 15:23:38,957 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 17 [2018-10-15 15:23:38,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:23:38,957 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-15 15:23:38,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-15 15:23:38,958 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-15 15:23:38,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-15 15:23:38,959 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:23:38,959 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:23:38,960 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:23:38,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:23:38,960 INFO L82 PathProgramCache]: Analyzing trace with hash -105961203, now seen corresponding path program 1 times [2018-10-15 15:23:38,961 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:23:38,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:23:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:23:39,221 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:23:39,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-10-15 15:23:39,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-15 15:23:39,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-15 15:23:39,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-15 15:23:39,224 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 5 states. [2018-10-15 15:23:39,630 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2018-10-15 15:23:39,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:23:39,749 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-15 15:23:39,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-15 15:23:39,751 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-10-15 15:23:39,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:23:39,752 INFO L225 Difference]: With dead ends: 27 [2018-10-15 15:23:39,752 INFO L226 Difference]: Without dead ends: 27 [2018-10-15 15:23:39,754 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-15 15:23:39,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-15 15:23:39,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-15 15:23:39,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-15 15:23:39,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-15 15:23:39,763 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 20 [2018-10-15 15:23:39,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:23:39,764 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-15 15:23:39,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-15 15:23:39,764 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-15 15:23:39,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-15 15:23:39,765 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:23:39,766 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:23:39,766 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:23:39,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:23:39,767 INFO L82 PathProgramCache]: Analyzing trace with hash 672057677, now seen corresponding path program 2 times [2018-10-15 15:23:39,770 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:23:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:23:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:23:39,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:23:39,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-10-15 15:23:39,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-15 15:23:39,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-15 15:23:39,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-15 15:23:39,933 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 7 states. [2018-10-15 15:23:40,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:23:40,204 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-15 15:23:40,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-15 15:23:40,205 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-10-15 15:23:40,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:23:40,206 INFO L225 Difference]: With dead ends: 33 [2018-10-15 15:23:40,206 INFO L226 Difference]: Without dead ends: 33 [2018-10-15 15:23:40,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2018-10-15 15:23:40,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-15 15:23:40,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-15 15:23:40,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-15 15:23:40,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-15 15:23:40,212 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 26 [2018-10-15 15:23:40,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:23:40,213 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-15 15:23:40,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-15 15:23:40,213 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-15 15:23:40,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-15 15:23:40,214 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:23:40,215 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:23:40,215 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:23:40,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:23:40,215 INFO L82 PathProgramCache]: Analyzing trace with hash -238732915, now seen corresponding path program 3 times [2018-10-15 15:23:40,216 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:23:40,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:23:40,655 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:23:40,655 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:23:40,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-10-15 15:23:40,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-15 15:23:40,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-15 15:23:40,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-15 15:23:40,657 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 9 states. [2018-10-15 15:23:41,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:23:41,067 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-15 15:23:41,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-15 15:23:41,068 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2018-10-15 15:23:41,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:23:41,069 INFO L225 Difference]: With dead ends: 39 [2018-10-15 15:23:41,069 INFO L226 Difference]: Without dead ends: 39 [2018-10-15 15:23:41,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2018-10-15 15:23:41,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-15 15:23:41,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-15 15:23:41,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-15 15:23:41,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-15 15:23:41,075 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 32 [2018-10-15 15:23:41,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:23:41,076 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-15 15:23:41,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-15 15:23:41,076 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-15 15:23:41,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-15 15:23:41,077 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:23:41,078 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:23:41,078 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:23:41,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:23:41,078 INFO L82 PathProgramCache]: Analyzing trace with hash 242645453, now seen corresponding path program 4 times [2018-10-15 15:23:41,079 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:23:41,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:23:41,365 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:23:41,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:23:41,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-10-15 15:23:41,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-15 15:23:41,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-15 15:23:41,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-15 15:23:41,367 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 11 states. [2018-10-15 15:23:41,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:23:41,813 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-15 15:23:41,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-15 15:23:41,814 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2018-10-15 15:23:41,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:23:41,815 INFO L225 Difference]: With dead ends: 45 [2018-10-15 15:23:41,816 INFO L226 Difference]: Without dead ends: 45 [2018-10-15 15:23:41,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2018-10-15 15:23:41,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-15 15:23:41,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-15 15:23:41,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-15 15:23:41,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-15 15:23:41,822 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 38 [2018-10-15 15:23:41,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:23:41,822 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-15 15:23:41,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-15 15:23:41,823 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-15 15:23:41,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-15 15:23:41,824 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:23:41,824 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:23:41,825 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:23:41,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:23:41,825 INFO L82 PathProgramCache]: Analyzing trace with hash -356087283, now seen corresponding path program 5 times [2018-10-15 15:23:41,826 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:23:41,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:23:42,109 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:23:42,110 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:23:42,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-10-15 15:23:42,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-15 15:23:42,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-15 15:23:42,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-15 15:23:42,111 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 13 states. [2018-10-15 15:23:42,794 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 11 [2018-10-15 15:23:42,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:23:42,942 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-15 15:23:42,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-15 15:23:42,946 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2018-10-15 15:23:42,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:23:42,947 INFO L225 Difference]: With dead ends: 51 [2018-10-15 15:23:42,947 INFO L226 Difference]: Without dead ends: 51 [2018-10-15 15:23:42,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2018-10-15 15:23:42,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-15 15:23:42,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-15 15:23:42,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-15 15:23:42,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-15 15:23:42,954 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 44 [2018-10-15 15:23:42,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:23:42,954 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-15 15:23:42,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-15 15:23:42,955 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-15 15:23:42,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-15 15:23:42,956 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:23:42,956 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:23:42,956 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:23:42,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:23:42,957 INFO L82 PathProgramCache]: Analyzing trace with hash -396793267, now seen corresponding path program 6 times [2018-10-15 15:23:42,958 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:23:42,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:23:43,756 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:23:43,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:23:43,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-10-15 15:23:43,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-15 15:23:43,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-15 15:23:43,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-15 15:23:43,758 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 15 states. [2018-10-15 15:23:44,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:23:44,461 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-15 15:23:44,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-15 15:23:44,461 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2018-10-15 15:23:44,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:23:44,463 INFO L225 Difference]: With dead ends: 57 [2018-10-15 15:23:44,463 INFO L226 Difference]: Without dead ends: 57 [2018-10-15 15:23:44,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2018-10-15 15:23:44,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-15 15:23:44,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-15 15:23:44,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-15 15:23:44,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-15 15:23:44,471 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 50 [2018-10-15 15:23:44,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:23:44,472 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-15 15:23:44,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-15 15:23:44,472 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-15 15:23:44,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-15 15:23:44,473 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:23:44,474 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:23:44,474 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:23:44,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:23:44,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1647109491, now seen corresponding path program 7 times [2018-10-15 15:23:44,475 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:23:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:23:45,137 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:23:45,137 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:23:45,137 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-15 15:23:45,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-15 15:23:45,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-15 15:23:45,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-15 15:23:45,139 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 17 states. [2018-10-15 15:23:45,330 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 10 [2018-10-15 15:23:46,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:23:46,054 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-15 15:23:46,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-15 15:23:46,055 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 56 [2018-10-15 15:23:46,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:23:46,057 INFO L225 Difference]: With dead ends: 63 [2018-10-15 15:23:46,057 INFO L226 Difference]: Without dead ends: 63 [2018-10-15 15:23:46,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=269, Invalid=661, Unknown=0, NotChecked=0, Total=930 [2018-10-15 15:23:46,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-15 15:23:46,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-15 15:23:46,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-15 15:23:46,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-15 15:23:46,064 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 56 [2018-10-15 15:23:46,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:23:46,068 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-15 15:23:46,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-15 15:23:46,069 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-15 15:23:46,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-15 15:23:46,070 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:23:46,070 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:23:46,070 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:23:46,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:23:46,071 INFO L82 PathProgramCache]: Analyzing trace with hash 383228621, now seen corresponding path program 8 times [2018-10-15 15:23:46,072 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:23:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:23:46,369 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:23:46,370 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:23:46,370 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-10-15 15:23:46,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-15 15:23:46,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-15 15:23:46,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-15 15:23:46,373 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 19 states. [2018-10-15 15:23:46,777 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 11 [2018-10-15 15:23:47,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:23:47,468 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-15 15:23:47,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-15 15:23:47,469 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 62 [2018-10-15 15:23:47,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:23:47,470 INFO L225 Difference]: With dead ends: 69 [2018-10-15 15:23:47,470 INFO L226 Difference]: Without dead ends: 69 [2018-10-15 15:23:47,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=339, Invalid=851, Unknown=0, NotChecked=0, Total=1190 [2018-10-15 15:23:47,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-15 15:23:47,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-15 15:23:47,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-15 15:23:47,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-15 15:23:47,476 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 62 [2018-10-15 15:23:47,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:23:47,477 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-15 15:23:47,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-15 15:23:47,477 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-15 15:23:47,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-15 15:23:47,478 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:23:47,478 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:23:47,478 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:23:47,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:23:47,479 INFO L82 PathProgramCache]: Analyzing trace with hash 336259853, now seen corresponding path program 9 times [2018-10-15 15:23:47,480 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:23:47,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:23:48,059 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:23:48,059 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:23:48,059 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-10-15 15:23:48,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-15 15:23:48,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-15 15:23:48,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-15 15:23:48,060 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 21 states. [2018-10-15 15:23:48,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:23:48,948 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-15 15:23:48,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-15 15:23:48,948 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 68 [2018-10-15 15:23:48,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:23:48,949 INFO L225 Difference]: With dead ends: 75 [2018-10-15 15:23:48,949 INFO L226 Difference]: Without dead ends: 75 [2018-10-15 15:23:48,951 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=417, Invalid=1065, Unknown=0, NotChecked=0, Total=1482 [2018-10-15 15:23:48,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-15 15:23:48,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-15 15:23:48,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-15 15:23:48,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-15 15:23:48,956 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 68 [2018-10-15 15:23:48,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:23:48,956 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-15 15:23:48,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-15 15:23:48,957 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-15 15:23:48,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-15 15:23:48,958 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:23:48,958 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:23:48,958 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:23:48,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:23:48,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1259408205, now seen corresponding path program 10 times [2018-10-15 15:23:48,959 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:23:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:23:49,336 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:23:49,337 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:23:49,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-10-15 15:23:49,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-15 15:23:49,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-15 15:23:49,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-15 15:23:49,338 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 23 states. [2018-10-15 15:23:50,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:23:50,815 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-15 15:23:50,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-15 15:23:50,816 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 74 [2018-10-15 15:23:50,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:23:50,817 INFO L225 Difference]: With dead ends: 81 [2018-10-15 15:23:50,817 INFO L226 Difference]: Without dead ends: 81 [2018-10-15 15:23:50,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=503, Invalid=1303, Unknown=0, NotChecked=0, Total=1806 [2018-10-15 15:23:50,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-15 15:23:50,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-15 15:23:50,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-15 15:23:50,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-15 15:23:50,827 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 74 [2018-10-15 15:23:50,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:23:50,827 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-15 15:23:50,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-15 15:23:50,827 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-15 15:23:50,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-15 15:23:50,829 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:23:50,829 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:23:50,829 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:23:50,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:23:50,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1500644467, now seen corresponding path program 11 times [2018-10-15 15:23:50,830 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:23:50,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:23:51,327 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:23:51,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:23:51,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-10-15 15:23:51,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-15 15:23:51,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-15 15:23:51,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-15 15:23:51,329 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 25 states. [2018-10-15 15:23:52,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:23:52,527 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-15 15:23:52,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-15 15:23:52,528 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2018-10-15 15:23:52,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:23:52,529 INFO L225 Difference]: With dead ends: 87 [2018-10-15 15:23:52,529 INFO L226 Difference]: Without dead ends: 87 [2018-10-15 15:23:52,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=597, Invalid=1565, Unknown=0, NotChecked=0, Total=2162 [2018-10-15 15:23:52,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-15 15:23:52,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-15 15:23:52,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-15 15:23:52,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-15 15:23:52,536 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 80 [2018-10-15 15:23:52,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:23:52,536 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-15 15:23:52,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-15 15:23:52,537 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-15 15:23:52,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-15 15:23:52,538 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:23:52,538 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:23:52,538 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:23:52,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:23:52,539 INFO L82 PathProgramCache]: Analyzing trace with hash -2044347443, now seen corresponding path program 12 times [2018-10-15 15:23:52,539 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:23:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:23:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:23:53,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:23:53,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-10-15 15:23:53,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-15 15:23:53,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-15 15:23:53,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-15 15:23:53,288 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 27 states. [2018-10-15 15:23:54,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:23:54,903 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-15 15:23:54,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-15 15:23:54,903 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 86 [2018-10-15 15:23:54,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:23:54,904 INFO L225 Difference]: With dead ends: 93 [2018-10-15 15:23:54,905 INFO L226 Difference]: Without dead ends: 93 [2018-10-15 15:23:54,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=699, Invalid=1851, Unknown=0, NotChecked=0, Total=2550 [2018-10-15 15:23:54,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-15 15:23:54,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-15 15:23:54,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-15 15:23:54,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-15 15:23:54,911 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 86 [2018-10-15 15:23:54,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:23:54,911 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-15 15:23:54,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-15 15:23:54,912 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-15 15:23:54,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-15 15:23:54,913 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:23:54,913 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:23:54,913 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:23:54,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:23:54,914 INFO L82 PathProgramCache]: Analyzing trace with hash -25408499, now seen corresponding path program 13 times [2018-10-15 15:23:54,914 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:23:54,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:23:55,533 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:23:55,533 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:23:55,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-10-15 15:23:55,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-15 15:23:55,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-15 15:23:55,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-15 15:23:55,535 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 29 states. [2018-10-15 15:23:55,803 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 10 [2018-10-15 15:23:56,150 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 11 [2018-10-15 15:23:57,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:23:57,763 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-15 15:23:57,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-15 15:23:57,764 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 92 [2018-10-15 15:23:57,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:23:57,765 INFO L225 Difference]: With dead ends: 99 [2018-10-15 15:23:57,765 INFO L226 Difference]: Without dead ends: 99 [2018-10-15 15:23:57,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=809, Invalid=2161, Unknown=0, NotChecked=0, Total=2970 [2018-10-15 15:23:57,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-15 15:23:57,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-15 15:23:57,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-15 15:23:57,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-15 15:23:57,771 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 92 [2018-10-15 15:23:57,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:23:57,771 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-15 15:23:57,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-15 15:23:57,772 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-15 15:23:57,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-15 15:23:57,773 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:23:57,773 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:23:57,773 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:23:57,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:23:57,774 INFO L82 PathProgramCache]: Analyzing trace with hash 422947917, now seen corresponding path program 14 times [2018-10-15 15:23:57,774 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:23:57,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:23:58,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:23:58,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:23:58,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-10-15 15:23:58,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-15 15:23:58,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-15 15:23:58,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-10-15 15:23:58,682 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 31 states. [2018-10-15 15:24:00,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:24:00,866 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-15 15:24:00,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-15 15:24:00,871 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 98 [2018-10-15 15:24:00,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:24:00,872 INFO L225 Difference]: With dead ends: 105 [2018-10-15 15:24:00,872 INFO L226 Difference]: Without dead ends: 105 [2018-10-15 15:24:00,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=927, Invalid=2495, Unknown=0, NotChecked=0, Total=3422 [2018-10-15 15:24:00,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-15 15:24:00,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-15 15:24:00,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-15 15:24:00,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-10-15 15:24:00,887 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 98 [2018-10-15 15:24:00,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:24:00,888 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-10-15 15:24:00,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-15 15:24:00,888 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-10-15 15:24:00,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-15 15:24:00,889 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:24:00,889 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:24:00,889 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:24:00,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:24:00,890 INFO L82 PathProgramCache]: Analyzing trace with hash 351657101, now seen corresponding path program 15 times [2018-10-15 15:24:00,890 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:24:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:24:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:24:02,816 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:24:02,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-10-15 15:24:02,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-15 15:24:02,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-15 15:24:02,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-10-15 15:24:02,817 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 33 states. [2018-10-15 15:24:05,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:24:05,254 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-15 15:24:05,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-15 15:24:05,255 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 104 [2018-10-15 15:24:05,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:24:05,256 INFO L225 Difference]: With dead ends: 111 [2018-10-15 15:24:05,256 INFO L226 Difference]: Without dead ends: 111 [2018-10-15 15:24:05,258 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1053, Invalid=2853, Unknown=0, NotChecked=0, Total=3906 [2018-10-15 15:24:05,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-15 15:24:05,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-15 15:24:05,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-15 15:24:05,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-15 15:24:05,261 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 104 [2018-10-15 15:24:05,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:24:05,262 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-15 15:24:05,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-15 15:24:05,262 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-15 15:24:05,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-15 15:24:05,263 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:24:05,263 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:24:05,264 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:24:05,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:24:05,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1520378675, now seen corresponding path program 16 times [2018-10-15 15:24:05,265 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:24:05,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:24:06,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:24:06,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:24:06,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-10-15 15:24:06,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-15 15:24:06,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-15 15:24:06,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-10-15 15:24:06,049 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 35 states. [2018-10-15 15:24:08,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:24:08,834 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-15 15:24:08,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-15 15:24:08,835 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 110 [2018-10-15 15:24:08,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:24:08,836 INFO L225 Difference]: With dead ends: 117 [2018-10-15 15:24:08,836 INFO L226 Difference]: Without dead ends: 117 [2018-10-15 15:24:08,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1187, Invalid=3235, Unknown=0, NotChecked=0, Total=4422 [2018-10-15 15:24:08,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-15 15:24:08,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-15 15:24:08,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-15 15:24:08,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-10-15 15:24:08,840 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 110 [2018-10-15 15:24:08,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:24:08,840 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-10-15 15:24:08,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-15 15:24:08,841 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-10-15 15:24:08,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-15 15:24:08,841 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:24:08,841 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:24:08,841 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:24:08,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:24:08,842 INFO L82 PathProgramCache]: Analyzing trace with hash 857386253, now seen corresponding path program 17 times [2018-10-15 15:24:08,842 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:24:08,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:24:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:24:09,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:24:09,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-10-15 15:24:09,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-15 15:24:09,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-15 15:24:09,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-10-15 15:24:09,805 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 37 states. [2018-10-15 15:24:12,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:24:12,705 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-10-15 15:24:12,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-15 15:24:12,706 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 116 [2018-10-15 15:24:12,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:24:12,707 INFO L225 Difference]: With dead ends: 123 [2018-10-15 15:24:12,707 INFO L226 Difference]: Without dead ends: 123 [2018-10-15 15:24:12,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1329, Invalid=3641, Unknown=0, NotChecked=0, Total=4970 [2018-10-15 15:24:12,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-15 15:24:12,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-15 15:24:12,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-15 15:24:12,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-10-15 15:24:12,711 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 116 [2018-10-15 15:24:12,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:24:12,711 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-10-15 15:24:12,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-15 15:24:12,712 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-10-15 15:24:12,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-15 15:24:12,712 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:24:12,712 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:24:12,713 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:24:12,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:24:12,713 INFO L82 PathProgramCache]: Analyzing trace with hash 466046285, now seen corresponding path program 18 times [2018-10-15 15:24:12,714 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:24:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:24:13,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:24:13,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:24:13,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-10-15 15:24:13,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-15 15:24:13,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-15 15:24:13,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-10-15 15:24:13,787 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 39 states. [2018-10-15 15:24:17,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:24:17,062 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-10-15 15:24:17,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-15 15:24:17,062 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 122 [2018-10-15 15:24:17,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:24:17,064 INFO L225 Difference]: With dead ends: 129 [2018-10-15 15:24:17,064 INFO L226 Difference]: Without dead ends: 129 [2018-10-15 15:24:17,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1479, Invalid=4071, Unknown=0, NotChecked=0, Total=5550 [2018-10-15 15:24:17,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-15 15:24:17,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-15 15:24:17,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-15 15:24:17,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-10-15 15:24:17,070 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 122 [2018-10-15 15:24:17,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:24:17,070 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-10-15 15:24:17,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-15 15:24:17,070 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-10-15 15:24:17,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-15 15:24:17,071 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:24:17,071 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:24:17,071 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:24:17,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:24:17,072 INFO L82 PathProgramCache]: Analyzing trace with hash -234177139, now seen corresponding path program 19 times [2018-10-15 15:24:17,072 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:24:17,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:24:18,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:24:18,103 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:24:18,103 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-10-15 15:24:18,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-15 15:24:18,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-15 15:24:18,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-10-15 15:24:18,104 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 41 states. [2018-10-15 15:24:21,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:24:21,799 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-10-15 15:24:21,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-15 15:24:21,800 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 128 [2018-10-15 15:24:21,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:24:21,801 INFO L225 Difference]: With dead ends: 135 [2018-10-15 15:24:21,801 INFO L226 Difference]: Without dead ends: 135 [2018-10-15 15:24:21,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1637, Invalid=4525, Unknown=0, NotChecked=0, Total=6162 [2018-10-15 15:24:21,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-15 15:24:21,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-10-15 15:24:21,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-15 15:24:21,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-10-15 15:24:21,805 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 128 [2018-10-15 15:24:21,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:24:21,805 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-10-15 15:24:21,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-15 15:24:21,805 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-10-15 15:24:21,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-15 15:24:21,806 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:24:21,806 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:24:21,806 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:24:21,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:24:21,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1115095603, now seen corresponding path program 20 times [2018-10-15 15:24:21,807 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:24:21,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:24:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:24:22,764 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:24:22,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-10-15 15:24:22,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-15 15:24:22,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-15 15:24:22,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-10-15 15:24:22,765 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 43 states. [2018-10-15 15:24:26,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:24:26,766 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-10-15 15:24:26,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-15 15:24:26,767 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 134 [2018-10-15 15:24:26,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:24:26,769 INFO L225 Difference]: With dead ends: 141 [2018-10-15 15:24:26,769 INFO L226 Difference]: Without dead ends: 141 [2018-10-15 15:24:26,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1803, Invalid=5003, Unknown=0, NotChecked=0, Total=6806 [2018-10-15 15:24:26,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-15 15:24:26,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-15 15:24:26,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-15 15:24:26,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-10-15 15:24:26,774 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 134 [2018-10-15 15:24:26,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:24:26,774 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-10-15 15:24:26,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-15 15:24:26,774 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-10-15 15:24:26,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-15 15:24:26,775 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:24:26,775 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:24:26,776 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:24:26,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:24:26,776 INFO L82 PathProgramCache]: Analyzing trace with hash 988155405, now seen corresponding path program 21 times [2018-10-15 15:24:26,777 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:24:26,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:24:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:24:28,159 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:24:28,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-10-15 15:24:28,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-15 15:24:28,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-15 15:24:28,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-10-15 15:24:28,160 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 45 states. [2018-10-15 15:24:28,715 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 11 [2018-10-15 15:24:32,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:24:32,716 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-10-15 15:24:32,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-15 15:24:32,720 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 140 [2018-10-15 15:24:32,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:24:32,721 INFO L225 Difference]: With dead ends: 147 [2018-10-15 15:24:32,721 INFO L226 Difference]: Without dead ends: 147 [2018-10-15 15:24:32,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1977, Invalid=5505, Unknown=0, NotChecked=0, Total=7482 [2018-10-15 15:24:32,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-15 15:24:32,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-15 15:24:32,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-15 15:24:32,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-10-15 15:24:32,725 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 140 [2018-10-15 15:24:32,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:24:32,725 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-10-15 15:24:32,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-15 15:24:32,725 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-10-15 15:24:32,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-15 15:24:32,726 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:24:32,726 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:24:32,727 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:24:32,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:24:32,727 INFO L82 PathProgramCache]: Analyzing trace with hash 465956429, now seen corresponding path program 22 times [2018-10-15 15:24:32,728 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:24:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:24:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:24:34,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:24:34,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-10-15 15:24:34,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-15 15:24:34,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-15 15:24:34,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-10-15 15:24:34,257 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 47 states. [2018-10-15 15:24:39,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:24:39,368 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-10-15 15:24:39,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-15 15:24:39,368 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 146 [2018-10-15 15:24:39,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:24:39,370 INFO L225 Difference]: With dead ends: 153 [2018-10-15 15:24:39,370 INFO L226 Difference]: Without dead ends: 153 [2018-10-15 15:24:39,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2159, Invalid=6031, Unknown=0, NotChecked=0, Total=8190 [2018-10-15 15:24:39,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-15 15:24:39,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-15 15:24:39,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-15 15:24:39,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-10-15 15:24:39,375 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 146 [2018-10-15 15:24:39,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:24:39,375 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-10-15 15:24:39,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-15 15:24:39,375 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-10-15 15:24:39,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-15 15:24:39,376 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:24:39,376 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:24:39,377 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:24:39,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:24:39,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1187815053, now seen corresponding path program 23 times [2018-10-15 15:24:39,378 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:24:39,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:24:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:24:40,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:24:40,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-10-15 15:24:40,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-15 15:24:40,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-15 15:24:40,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-10-15 15:24:40,763 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 49 states. [2018-10-15 15:24:46,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:24:46,219 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-10-15 15:24:46,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-15 15:24:46,219 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 152 [2018-10-15 15:24:46,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:24:46,220 INFO L225 Difference]: With dead ends: 159 [2018-10-15 15:24:46,220 INFO L226 Difference]: Without dead ends: 159 [2018-10-15 15:24:46,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=2349, Invalid=6581, Unknown=0, NotChecked=0, Total=8930 [2018-10-15 15:24:46,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-15 15:24:46,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-10-15 15:24:46,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-15 15:24:46,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-10-15 15:24:46,224 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 152 [2018-10-15 15:24:46,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:24:46,225 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-10-15 15:24:46,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-15 15:24:46,225 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-10-15 15:24:46,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-15 15:24:46,226 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:24:46,226 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:24:46,226 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:24:46,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:24:46,227 INFO L82 PathProgramCache]: Analyzing trace with hash 396238541, now seen corresponding path program 24 times [2018-10-15 15:24:46,227 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:24:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:24:47,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:24:47,711 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:24:47,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-10-15 15:24:47,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-15 15:24:47,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-15 15:24:47,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-10-15 15:24:47,712 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 51 states. [2018-10-15 15:24:48,029 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 10 [2018-10-15 15:24:48,278 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-15 15:24:48,424 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-10-15 15:24:53,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:24:53,748 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-10-15 15:24:53,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-15 15:24:53,748 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 158 [2018-10-15 15:24:53,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:24:53,749 INFO L225 Difference]: With dead ends: 165 [2018-10-15 15:24:53,749 INFO L226 Difference]: Without dead ends: 165 [2018-10-15 15:24:53,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=2547, Invalid=7155, Unknown=0, NotChecked=0, Total=9702 [2018-10-15 15:24:53,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-15 15:24:53,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-15 15:24:53,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-15 15:24:53,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-10-15 15:24:53,754 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 158 [2018-10-15 15:24:53,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:24:53,754 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-10-15 15:24:53,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-15 15:24:53,755 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-10-15 15:24:53,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-15 15:24:53,755 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:24:53,756 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:24:53,756 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:24:53,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:24:53,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1629589747, now seen corresponding path program 25 times [2018-10-15 15:24:53,757 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:24:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:24:55,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:24:55,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:24:55,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-10-15 15:24:55,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-15 15:24:55,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-15 15:24:55,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-10-15 15:24:55,793 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 53 states. [2018-10-15 15:24:56,125 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 10 [2018-10-15 15:24:56,243 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 9 [2018-10-15 15:24:56,371 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 15:24:56,501 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 15:25:02,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:25:02,334 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-10-15 15:25:02,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-15 15:25:02,335 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 164 [2018-10-15 15:25:02,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:25:02,336 INFO L225 Difference]: With dead ends: 171 [2018-10-15 15:25:02,337 INFO L226 Difference]: Without dead ends: 171 [2018-10-15 15:25:02,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=2753, Invalid=7753, Unknown=0, NotChecked=0, Total=10506 [2018-10-15 15:25:02,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-15 15:25:02,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-10-15 15:25:02,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-15 15:25:02,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-10-15 15:25:02,341 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 164 [2018-10-15 15:25:02,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:25:02,342 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-10-15 15:25:02,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-15 15:25:02,342 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-10-15 15:25:02,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-15 15:25:02,343 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:25:02,343 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:25:02,343 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:25:02,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:25:02,344 INFO L82 PathProgramCache]: Analyzing trace with hash -500068531, now seen corresponding path program 26 times [2018-10-15 15:25:02,344 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:25:02,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:25:04,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 0 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:25:04,485 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:25:04,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-10-15 15:25:04,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-15 15:25:04,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-15 15:25:04,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-10-15 15:25:04,486 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 55 states. [2018-10-15 15:25:04,960 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 10 [2018-10-15 15:25:05,083 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2018-10-15 15:25:05,218 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 15:25:05,347 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 15:25:05,488 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 15:25:11,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:25:11,779 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-10-15 15:25:11,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-15 15:25:11,780 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 170 [2018-10-15 15:25:11,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:25:11,782 INFO L225 Difference]: With dead ends: 177 [2018-10-15 15:25:11,782 INFO L226 Difference]: Without dead ends: 177 [2018-10-15 15:25:11,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=2967, Invalid=8375, Unknown=0, NotChecked=0, Total=11342 [2018-10-15 15:25:11,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-15 15:25:11,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-10-15 15:25:11,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-10-15 15:25:11,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-10-15 15:25:11,785 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 170 [2018-10-15 15:25:11,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:25:11,786 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-10-15 15:25:11,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-15 15:25:11,786 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-10-15 15:25:11,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-15 15:25:11,787 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:25:11,787 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:25:11,787 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:25:11,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:25:11,787 INFO L82 PathProgramCache]: Analyzing trace with hash 473661325, now seen corresponding path program 27 times [2018-10-15 15:25:11,788 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:25:11,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:25:14,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 0 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:25:14,295 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:25:14,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-10-15 15:25:14,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-15 15:25:14,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-15 15:25:14,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-10-15 15:25:14,296 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 57 states. [2018-10-15 15:25:14,642 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 10 [2018-10-15 15:25:14,785 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2018-10-15 15:25:14,951 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 15:25:15,105 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 15:25:15,253 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 15:25:16,034 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-10-15 15:25:22,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:25:22,203 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-10-15 15:25:22,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-15 15:25:22,203 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 176 [2018-10-15 15:25:22,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:25:22,205 INFO L225 Difference]: With dead ends: 183 [2018-10-15 15:25:22,205 INFO L226 Difference]: Without dead ends: 183 [2018-10-15 15:25:22,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=3189, Invalid=9021, Unknown=0, NotChecked=0, Total=12210 [2018-10-15 15:25:22,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-15 15:25:22,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-10-15 15:25:22,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-15 15:25:22,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-10-15 15:25:22,209 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 176 [2018-10-15 15:25:22,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:25:22,209 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-10-15 15:25:22,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-15 15:25:22,210 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-10-15 15:25:22,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-15 15:25:22,211 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:25:22,211 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:25:22,211 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:25:22,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:25:22,211 INFO L82 PathProgramCache]: Analyzing trace with hash -56606771, now seen corresponding path program 28 times [2018-10-15 15:25:22,212 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:25:22,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:25:24,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:25:24,397 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:25:24,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-10-15 15:25:24,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-15 15:25:24,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-15 15:25:24,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-10-15 15:25:24,398 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 59 states. [2018-10-15 15:25:24,765 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 10 [2018-10-15 15:25:24,908 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 9 [2018-10-15 15:25:25,080 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 15:25:25,251 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 15:25:25,405 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 15:25:25,561 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 15:25:25,714 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 15:25:25,876 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 15:25:26,046 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 15:25:26,216 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 15:25:26,563 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-10-15 15:25:33,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:25:33,263 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-10-15 15:25:33,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-15 15:25:33,264 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 182 [2018-10-15 15:25:33,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:25:33,266 INFO L225 Difference]: With dead ends: 189 [2018-10-15 15:25:33,266 INFO L226 Difference]: Without dead ends: 189 [2018-10-15 15:25:33,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=3419, Invalid=9691, Unknown=0, NotChecked=0, Total=13110 [2018-10-15 15:25:33,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-15 15:25:33,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-10-15 15:25:33,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-15 15:25:33,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-10-15 15:25:33,270 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 182 [2018-10-15 15:25:33,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:25:33,271 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-10-15 15:25:33,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-15 15:25:33,271 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-10-15 15:25:33,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-15 15:25:33,272 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:25:33,272 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:25:33,272 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:25:33,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:25:33,273 INFO L82 PathProgramCache]: Analyzing trace with hash -402403315, now seen corresponding path program 29 times [2018-10-15 15:25:33,273 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:25:33,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:25:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 0 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:25:35,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:25:35,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-10-15 15:25:35,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-15 15:25:35,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-15 15:25:35,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-10-15 15:25:35,981 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 61 states. [2018-10-15 15:25:36,365 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 10 [2018-10-15 15:25:36,517 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 9 [2018-10-15 15:25:36,682 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 15:25:36,846 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 15:25:37,015 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 15:25:37,185 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 15:25:37,346 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 15:25:37,510 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 15:25:37,686 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 15:25:37,857 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 15:25:38,031 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 15:25:38,391 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-15 15:25:40,451 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 11 [2018-10-15 15:25:45,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:25:45,428 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-10-15 15:25:45,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-15 15:25:45,428 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 188 [2018-10-15 15:25:45,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:25:45,430 INFO L225 Difference]: With dead ends: 195 [2018-10-15 15:25:45,430 INFO L226 Difference]: Without dead ends: 195 [2018-10-15 15:25:45,431 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=3657, Invalid=10385, Unknown=0, NotChecked=0, Total=14042 [2018-10-15 15:25:45,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-15 15:25:45,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-10-15 15:25:45,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-15 15:25:45,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-10-15 15:25:45,434 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 188 [2018-10-15 15:25:45,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:25:45,435 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-10-15 15:25:45,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-15 15:25:45,435 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-10-15 15:25:45,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-15 15:25:45,436 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:25:45,436 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:25:45,436 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:25:45,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:25:45,437 INFO L82 PathProgramCache]: Analyzing trace with hash 940191821, now seen corresponding path program 30 times [2018-10-15 15:25:45,437 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:25:45,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:25:47,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 0 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:25:47,696 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:25:47,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-10-15 15:25:47,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-15 15:25:47,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-15 15:25:47,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-10-15 15:25:47,698 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 63 states. [2018-10-15 15:25:48,103 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 10 [2018-10-15 15:25:48,259 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 9 [2018-10-15 15:25:48,428 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 15:25:48,598 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 15:25:48,763 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 15:25:48,926 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 15:25:49,100 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 15:25:49,283 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 15:25:49,467 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 15:25:49,656 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 15:25:49,846 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 15:25:50,031 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 15:25:50,633 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 15:25:50,840 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-15 15:25:58,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:25:58,120 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-10-15 15:25:58,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-15 15:25:58,121 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 194 [2018-10-15 15:25:58,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:25:58,123 INFO L225 Difference]: With dead ends: 201 [2018-10-15 15:25:58,123 INFO L226 Difference]: Without dead ends: 201 [2018-10-15 15:25:58,124 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=3903, Invalid=11103, Unknown=0, NotChecked=0, Total=15006 [2018-10-15 15:25:58,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-15 15:25:58,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-10-15 15:25:58,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-10-15 15:25:58,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2018-10-15 15:25:58,128 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 194 [2018-10-15 15:25:58,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:25:58,128 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2018-10-15 15:25:58,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-15 15:25:58,128 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2018-10-15 15:25:58,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-15 15:25:58,129 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:25:58,129 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:25:58,130 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:25:58,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:25:58,130 INFO L82 PathProgramCache]: Analyzing trace with hash 2069323917, now seen corresponding path program 31 times [2018-10-15 15:25:58,131 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:25:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:26:01,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:26:01,453 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:26:01,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-10-15 15:26:01,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-15 15:26:01,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-15 15:26:01,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-10-15 15:26:01,455 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 65 states. [2018-10-15 15:26:01,878 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 10 [2018-10-15 15:26:02,037 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 9 [2018-10-15 15:26:02,204 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 15:26:02,375 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 15:26:02,554 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 15:26:02,727 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 15:26:02,895 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 15:26:03,069 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 15:26:03,257 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 15:26:03,434 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 15:26:03,624 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 15:26:03,809 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 15:26:03,997 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 15:26:04,189 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 15:26:04,389 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 15:26:06,084 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 11 [2018-10-15 15:26:12,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:26:12,503 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2018-10-15 15:26:12,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-15 15:26:12,503 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 200 [2018-10-15 15:26:12,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:26:12,505 INFO L225 Difference]: With dead ends: 207 [2018-10-15 15:26:12,505 INFO L226 Difference]: Without dead ends: 207 [2018-10-15 15:26:12,506 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=4157, Invalid=11845, Unknown=0, NotChecked=0, Total=16002 [2018-10-15 15:26:12,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-10-15 15:26:12,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-10-15 15:26:12,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-10-15 15:26:12,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2018-10-15 15:26:12,509 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 200 [2018-10-15 15:26:12,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:26:12,510 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2018-10-15 15:26:12,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-15 15:26:12,510 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2018-10-15 15:26:12,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-15 15:26:12,511 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:26:12,511 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:26:12,511 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:26:12,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:26:12,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1248894771, now seen corresponding path program 32 times [2018-10-15 15:26:12,512 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:26:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:26:15,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:26:15,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:26:15,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-10-15 15:26:15,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-15 15:26:15,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-15 15:26:15,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-10-15 15:26:15,343 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 67 states. [2018-10-15 15:26:15,782 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 10 [2018-10-15 15:26:15,949 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 9 [2018-10-15 15:26:16,127 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 15:26:16,332 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 15:26:16,529 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 15:26:16,704 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 15:26:16,897 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 15:26:17,096 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 15:26:17,294 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 15:26:17,491 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 15:26:17,690 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 15:26:17,891 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 15:26:18,088 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 15:26:18,279 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 15:26:18,492 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 15:26:19,118 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 15:26:19,340 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-15 15:26:27,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:26:27,249 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-10-15 15:26:27,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-15 15:26:27,250 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 206 [2018-10-15 15:26:27,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:26:27,251 INFO L225 Difference]: With dead ends: 213 [2018-10-15 15:26:27,251 INFO L226 Difference]: Without dead ends: 213 [2018-10-15 15:26:27,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=4419, Invalid=12611, Unknown=0, NotChecked=0, Total=17030 [2018-10-15 15:26:27,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-10-15 15:26:27,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-10-15 15:26:27,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-10-15 15:26:27,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2018-10-15 15:26:27,256 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 206 [2018-10-15 15:26:27,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:26:27,256 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2018-10-15 15:26:27,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-15 15:26:27,256 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2018-10-15 15:26:27,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-10-15 15:26:27,257 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:26:27,257 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:26:27,258 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:26:27,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:26:27,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1621741299, now seen corresponding path program 33 times [2018-10-15 15:26:27,259 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:26:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:26:30,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 0 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:26:30,423 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:26:30,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-10-15 15:26:30,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-15 15:26:30,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-15 15:26:30,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-10-15 15:26:30,424 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 69 states. [2018-10-15 15:26:30,877 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 10 [2018-10-15 15:26:31,047 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 9 [2018-10-15 15:26:31,239 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 15:26:31,423 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 15:26:31,636 WARN L179 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 15:26:31,853 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 15:26:32,043 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 15:26:32,240 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 15:26:32,439 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 15:26:32,652 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 15:26:32,857 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 15:26:33,078 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 15:26:33,287 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 15:26:33,496 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 15:26:33,731 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 15:26:33,954 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 15:26:34,175 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 15:26:34,409 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 15:26:35,084 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-15 15:26:36,666 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 11 [2018-10-15 15:26:43,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:26:43,364 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2018-10-15 15:26:43,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-15 15:26:43,365 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 212 [2018-10-15 15:26:43,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:26:43,366 INFO L225 Difference]: With dead ends: 219 [2018-10-15 15:26:43,366 INFO L226 Difference]: Without dead ends: 219 [2018-10-15 15:26:43,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=4689, Invalid=13401, Unknown=0, NotChecked=0, Total=18090 [2018-10-15 15:26:43,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-15 15:26:43,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-10-15 15:26:43,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-10-15 15:26:43,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2018-10-15 15:26:43,370 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 212 [2018-10-15 15:26:43,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:26:43,371 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2018-10-15 15:26:43,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-15 15:26:43,371 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2018-10-15 15:26:43,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-15 15:26:43,372 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:26:43,372 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:26:43,372 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:26:43,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:26:43,372 INFO L82 PathProgramCache]: Analyzing trace with hash -430976691, now seen corresponding path program 34 times [2018-10-15 15:26:43,373 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:26:43,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:26:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:26:46,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:26:46,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-10-15 15:26:46,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-15 15:26:46,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-15 15:26:46,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-10-15 15:26:46,018 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 71 states. [2018-10-15 15:26:46,502 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 10 [2018-10-15 15:26:46,688 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 9 [2018-10-15 15:26:46,926 WARN L179 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 15:26:47,158 WARN L179 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 15:26:47,367 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 15:26:47,566 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 15:26:47,772 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 15:26:47,978 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 15:26:48,197 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 15:26:48,415 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 15:26:48,635 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 15:26:48,851 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 15:26:49,070 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 15:26:49,278 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 15:26:49,510 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 15:26:49,743 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 15:26:49,972 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 15:26:50,210 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 15:26:50,446 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 15:26:50,683 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 15:26:50,931 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 15:26:52,123 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-10-15 15:26:59,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:26:59,841 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2018-10-15 15:26:59,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-15 15:26:59,842 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 218 [2018-10-15 15:26:59,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:26:59,843 INFO L225 Difference]: With dead ends: 225 [2018-10-15 15:26:59,843 INFO L226 Difference]: Without dead ends: 225 [2018-10-15 15:26:59,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=4967, Invalid=14215, Unknown=0, NotChecked=0, Total=19182 [2018-10-15 15:26:59,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-10-15 15:26:59,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2018-10-15 15:26:59,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-10-15 15:26:59,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 225 transitions. [2018-10-15 15:26:59,847 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 225 transitions. Word has length 218 [2018-10-15 15:26:59,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:26:59,847 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 225 transitions. [2018-10-15 15:26:59,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-15 15:26:59,847 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 225 transitions. [2018-10-15 15:26:59,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-10-15 15:26:59,848 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:26:59,848 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:26:59,849 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:26:59,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:26:59,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1830830477, now seen corresponding path program 35 times [2018-10-15 15:26:59,850 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:27:00,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:27:03,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7176 backedges. 0 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:27:03,189 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:27:03,189 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-10-15 15:27:03,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-15 15:27:03,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-15 15:27:03,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-10-15 15:27:03,190 INFO L87 Difference]: Start difference. First operand 225 states and 225 transitions. Second operand 73 states. [2018-10-15 15:27:03,677 WARN L179 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 10 [2018-10-15 15:27:03,874 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 9 [2018-10-15 15:27:04,077 WARN L179 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 15:27:04,283 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 15:27:04,493 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 15:27:04,708 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 15:27:04,912 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 15:27:05,125 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 15:27:05,357 WARN L179 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 15:27:05,573 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 15:27:05,794 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 15:27:06,022 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 15:27:06,246 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 15:27:06,471 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 15:27:06,712 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 15:27:06,950 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 15:27:07,194 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 15:27:07,451 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 15:27:07,713 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 15:27:07,958 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 15:27:08,217 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 15:27:08,466 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 15:27:18,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:27:18,074 INFO L93 Difference]: Finished difference Result 231 states and 231 transitions. [2018-10-15 15:27:18,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-15 15:27:18,074 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 224 [2018-10-15 15:27:18,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:27:18,076 INFO L225 Difference]: With dead ends: 231 [2018-10-15 15:27:18,076 INFO L226 Difference]: Without dead ends: 231 [2018-10-15 15:27:18,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=5253, Invalid=15053, Unknown=0, NotChecked=0, Total=20306 [2018-10-15 15:27:18,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-10-15 15:27:18,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-10-15 15:27:18,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-10-15 15:27:18,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 231 transitions. [2018-10-15 15:27:18,081 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 231 transitions. Word has length 224 [2018-10-15 15:27:18,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:27:18,082 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 231 transitions. [2018-10-15 15:27:18,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-15 15:27:18,082 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 231 transitions. [2018-10-15 15:27:18,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-10-15 15:27:18,083 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:27:18,083 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:27:18,083 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:27:18,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:27:18,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1955888691, now seen corresponding path program 36 times [2018-10-15 15:27:18,084 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:27:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:27:21,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7597 backedges. 0 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:27:21,112 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:27:21,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2018-10-15 15:27:21,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-15 15:27:21,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-15 15:27:21,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2018-10-15 15:27:21,113 INFO L87 Difference]: Start difference. First operand 231 states and 231 transitions. Second operand 75 states. [2018-10-15 15:27:21,608 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 10 [2018-10-15 15:27:21,805 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 9 [2018-10-15 15:27:22,018 WARN L179 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 15:27:22,234 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 15:27:22,457 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 15:27:22,676 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 15:27:22,940 WARN L179 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 15:27:23,163 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 15:27:23,396 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 15:27:23,625 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 15:27:23,853 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 15:27:24,093 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 15:27:24,330 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 15:27:24,562 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 15:27:24,811 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 15:27:25,058 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 15:27:25,300 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 15:27:25,550 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 15:27:25,793 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 15:27:26,054 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 15:27:26,308 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 15:27:26,562 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 15:27:26,817 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 15:27:27,091 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 15:27:27,356 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 15:27:27,611 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 15:27:27,888 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-15 15:27:28,184 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-10-15 15:27:34,377 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 11 [2018-10-15 15:27:37,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:27:37,026 INFO L93 Difference]: Finished difference Result 237 states and 237 transitions. [2018-10-15 15:27:37,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-15 15:27:37,027 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 230 [2018-10-15 15:27:37,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:27:37,028 INFO L225 Difference]: With dead ends: 237 [2018-10-15 15:27:37,028 INFO L226 Difference]: Without dead ends: 237 [2018-10-15 15:27:37,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=5547, Invalid=15915, Unknown=0, NotChecked=0, Total=21462 [2018-10-15 15:27:37,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-10-15 15:27:37,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2018-10-15 15:27:37,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-10-15 15:27:37,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2018-10-15 15:27:37,031 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 230 [2018-10-15 15:27:37,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:27:37,032 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2018-10-15 15:27:37,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-15 15:27:37,032 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2018-10-15 15:27:37,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-10-15 15:27:37,033 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:27:37,033 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:27:37,033 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:27:37,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:27:37,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1305842189, now seen corresponding path program 37 times [2018-10-15 15:27:37,034 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:27:37,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:27:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:27:40,339 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:27:40,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2018-10-15 15:27:40,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-15 15:27:40,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-15 15:27:40,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2018-10-15 15:27:40,341 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand 77 states. [2018-10-15 15:27:40,919 WARN L179 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 10 [2018-10-15 15:27:41,129 WARN L179 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 9 [2018-10-15 15:27:41,355 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 15:27:41,579 WARN L179 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 15:27:41,810 WARN L179 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 15:27:42,030 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 15:27:42,270 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 15:27:42,505 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 15:27:42,745 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 15:27:42,994 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 15:27:43,250 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 15:27:43,534 WARN L179 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 15:27:43,786 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 15:27:44,033 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 15:27:44,306 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 15:27:44,568 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 15:27:44,829 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 15:27:45,104 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 15:27:45,373 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 15:27:45,650 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 15:27:45,935 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 15:27:46,206 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 15:27:46,472 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 15:27:46,745 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 15:27:47,022 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 15:27:47,299 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 15:27:47,575 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 15:27:47,849 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 15:27:48,433 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-10-15 15:27:57,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:27:57,523 INFO L93 Difference]: Finished difference Result 243 states and 243 transitions. [2018-10-15 15:27:57,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-15 15:27:57,524 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 236 [2018-10-15 15:27:57,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:27:57,525 INFO L225 Difference]: With dead ends: 243 [2018-10-15 15:27:57,525 INFO L226 Difference]: Without dead ends: 243 [2018-10-15 15:27:57,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2701 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=5849, Invalid=16801, Unknown=0, NotChecked=0, Total=22650 [2018-10-15 15:27:57,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-10-15 15:27:57,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2018-10-15 15:27:57,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-10-15 15:27:57,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2018-10-15 15:27:57,528 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 236 [2018-10-15 15:27:57,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:27:57,528 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2018-10-15 15:27:57,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-15 15:27:57,529 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2018-10-15 15:27:57,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-10-15 15:27:57,529 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:27:57,530 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:27:57,530 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:27:57,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:27:57,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1241353651, now seen corresponding path program 38 times [2018-10-15 15:27:57,530 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:27:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:28:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8475 backedges. 0 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:28:01,556 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:28:01,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2018-10-15 15:28:01,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-15 15:28:01,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-15 15:28:01,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2018-10-15 15:28:01,558 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand 79 states. [2018-10-15 15:28:02,177 WARN L179 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 10 [2018-10-15 15:28:02,400 WARN L179 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 9 [2018-10-15 15:28:02,638 WARN L179 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-15 15:28:02,872 WARN L179 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-15 15:28:03,111 WARN L179 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 15:28:03,350 WARN L179 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 15:28:03,598 WARN L179 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 15:28:03,880 WARN L179 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 15:28:04,140 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 15:28:04,398 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 15:28:04,646 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 15:28:04,905 WARN L179 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 15:28:05,168 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 15:28:05,418 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 15:28:05,687 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 15:28:05,954 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 15:28:06,222 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 15:28:06,502 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 15:28:06,784 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 15:28:07,067 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 15:28:07,343 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 15:28:07,631 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 15:28:07,924 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 15:28:08,210 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 15:28:08,502 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 15:28:08,799 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 15:28:09,118 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 15:28:09,397 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 15:28:09,686 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 15:28:20,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:28:20,036 INFO L93 Difference]: Finished difference Result 249 states and 249 transitions. [2018-10-15 15:28:20,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-15 15:28:20,036 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 242 [2018-10-15 15:28:20,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:28:20,038 INFO L225 Difference]: With dead ends: 249 [2018-10-15 15:28:20,038 INFO L226 Difference]: Without dead ends: 249 [2018-10-15 15:28:20,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=6159, Invalid=17711, Unknown=0, NotChecked=0, Total=23870 [2018-10-15 15:28:20,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-10-15 15:28:20,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2018-10-15 15:28:20,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-10-15 15:28:20,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 249 transitions. [2018-10-15 15:28:20,042 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 249 transitions. Word has length 242 [2018-10-15 15:28:20,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:28:20,043 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 249 transitions. [2018-10-15 15:28:20,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-15 15:28:20,043 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 249 transitions. [2018-10-15 15:28:20,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-10-15 15:28:20,044 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:28:20,044 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:28:20,045 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:28:20,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:28:20,045 INFO L82 PathProgramCache]: Analyzing trace with hash -90824051, now seen corresponding path program 39 times [2018-10-15 15:28:20,045 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:28:20,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:28:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8932 backedges. 0 proven. 8932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:28:23,494 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:28:23,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2018-10-15 15:28:23,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-15 15:28:23,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-15 15:28:23,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2018-10-15 15:28:23,495 INFO L87 Difference]: Start difference. First operand 249 states and 249 transitions. Second operand 81 states. [2018-10-15 15:28:24,048 WARN L179 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 10 [2018-10-15 15:28:24,306 WARN L179 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 9 [2018-10-15 15:28:24,572 WARN L179 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-15 15:28:24,812 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-15 15:28:25,062 WARN L179 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-15 15:28:25,316 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-15 15:28:25,575 WARN L179 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 15:28:25,829 WARN L179 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 15:28:26,096 WARN L179 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 15:28:26,364 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 15:28:26,633 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 15:28:26,888 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 15:28:27,157 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 15:28:27,418 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 15:28:27,702 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 15:28:27,992 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 15:28:28,264 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 15:28:28,556 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 15:28:28,855 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 15:28:29,155 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 15:28:29,483 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 15:28:29,786 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 15:28:30,077 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 15:28:30,373 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 15:28:30,681 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 15:28:30,977 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 15:28:31,295 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 15:28:31,590 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 15:28:31,884 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 15:28:32,183 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 15:28:32,480 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 15:28:32,785 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 15:28:43,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:28:43,091 INFO L93 Difference]: Finished difference Result 255 states and 255 transitions. [2018-10-15 15:28:43,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-15 15:28:43,092 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 248 [2018-10-15 15:28:43,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:28:43,093 INFO L225 Difference]: With dead ends: 255 [2018-10-15 15:28:43,093 INFO L226 Difference]: Without dead ends: 255 [2018-10-15 15:28:43,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3003 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=6477, Invalid=18645, Unknown=0, NotChecked=0, Total=25122 [2018-10-15 15:28:43,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-10-15 15:28:43,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2018-10-15 15:28:43,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-10-15 15:28:43,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 255 transitions. [2018-10-15 15:28:43,098 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 255 transitions. Word has length 248 [2018-10-15 15:28:43,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:28:43,099 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 255 transitions. [2018-10-15 15:28:43,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-15 15:28:43,099 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 255 transitions. [2018-10-15 15:28:43,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-10-15 15:28:43,100 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:28:43,100 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:28:43,100 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:28:43,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:28:43,101 INFO L82 PathProgramCache]: Analyzing trace with hash -952851763, now seen corresponding path program 40 times [2018-10-15 15:28:43,101 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:28:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:28:47,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:28:47,158 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:28:47,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2018-10-15 15:28:47,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-15 15:28:47,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-15 15:28:47,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2018-10-15 15:28:47,159 INFO L87 Difference]: Start difference. First operand 255 states and 255 transitions. Second operand 83 states. [2018-10-15 15:28:47,765 WARN L179 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 10 [2018-10-15 15:28:48,002 WARN L179 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 9 [2018-10-15 15:28:48,254 WARN L179 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-10-15 15:28:48,504 WARN L179 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-10-15 15:28:48,764 WARN L179 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-15 15:28:49,030 WARN L179 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-15 15:28:49,292 WARN L179 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-15 15:28:49,548 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-15 15:28:49,843 WARN L179 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 15:28:50,153 WARN L179 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 15:28:50,427 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 15:28:50,715 WARN L179 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 15:28:50,993 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 15:28:51,277 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 15:28:51,578 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 15:28:51,888 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 15:28:52,187 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 15:28:52,496 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 15:28:52,810 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 15:28:53,128 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 15:28:53,449 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 15:28:53,764 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 15:28:54,082 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 15:28:54,400 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 15:28:54,724 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 15:28:55,060 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 15:28:55,398 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 15:28:55,708 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 15:28:56,029 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 15:28:56,344 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 15:28:56,649 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 15:28:57,275 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 15:28:57,587 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 15:28:57,901 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-15 15:29:08,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:29:08,210 INFO L93 Difference]: Finished difference Result 261 states and 261 transitions. [2018-10-15 15:29:08,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-15 15:29:08,210 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 254 [2018-10-15 15:29:08,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:29:08,212 INFO L225 Difference]: With dead ends: 261 [2018-10-15 15:29:08,212 INFO L226 Difference]: Without dead ends: 261 [2018-10-15 15:29:08,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3160 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=6803, Invalid=19603, Unknown=0, NotChecked=0, Total=26406 [2018-10-15 15:29:08,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-10-15 15:29:08,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2018-10-15 15:29:08,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-10-15 15:29:08,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 261 transitions. [2018-10-15 15:29:08,217 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 261 transitions. Word has length 254 [2018-10-15 15:29:08,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:29:08,218 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 261 transitions. [2018-10-15 15:29:08,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-15 15:29:08,218 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 261 transitions. [2018-10-15 15:29:08,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-10-15 15:29:08,219 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:29:08,219 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:29:08,219 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:29:08,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:29:08,220 INFO L82 PathProgramCache]: Analyzing trace with hash 2088891149, now seen corresponding path program 41 times [2018-10-15 15:29:08,220 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:29:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:29:12,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9882 backedges. 0 proven. 9882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:29:12,211 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:29:12,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2018-10-15 15:29:12,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-15 15:29:12,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-15 15:29:12,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2018-10-15 15:29:12,213 INFO L87 Difference]: Start difference. First operand 261 states and 261 transitions. Second operand 85 states. [2018-10-15 15:29:12,824 WARN L179 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 10 [2018-10-15 15:29:13,078 WARN L179 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 9 [2018-10-15 15:29:13,344 WARN L179 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-10-15 15:29:13,627 WARN L179 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-10-15 15:29:13,907 WARN L179 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-10-15 15:29:14,184 WARN L179 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-10-15 15:29:14,456 WARN L179 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-15 15:29:14,734 WARN L179 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-15 15:29:15,016 WARN L179 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-15 15:29:15,318 WARN L179 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-15 15:29:15,636 WARN L179 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 15:29:15,929 WARN L179 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 15:29:16,218 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 15:29:16,511 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 15:29:16,824 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 15:29:17,142 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 15:29:17,454 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 15:29:17,773 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 15:29:18,084 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 15:29:18,396 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 15:29:18,719 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 15:29:19,047 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 15:29:19,380 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 15:29:19,706 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 15:29:20,033 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 15:29:20,369 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 15:29:20,725 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 15:29:21,059 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 15:29:21,380 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 15:29:21,706 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 15:29:22,026 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 15:29:22,351 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 15:29:22,674 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 15:29:22,999 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 15:29:23,634 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 15:29:26,580 WARN L179 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 11 [2018-10-15 15:29:35,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:29:35,065 INFO L93 Difference]: Finished difference Result 267 states and 267 transitions. [2018-10-15 15:29:35,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-15 15:29:35,066 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 260 [2018-10-15 15:29:35,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:29:35,067 INFO L225 Difference]: With dead ends: 267 [2018-10-15 15:29:35,067 INFO L226 Difference]: Without dead ends: 267 [2018-10-15 15:29:35,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=7137, Invalid=20585, Unknown=0, NotChecked=0, Total=27722 [2018-10-15 15:29:35,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-10-15 15:29:35,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2018-10-15 15:29:35,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-10-15 15:29:35,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 267 transitions. [2018-10-15 15:29:35,072 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 267 transitions. Word has length 260 [2018-10-15 15:29:35,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:29:35,072 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 267 transitions. [2018-10-15 15:29:35,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-15 15:29:35,073 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 267 transitions. [2018-10-15 15:29:35,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-10-15 15:29:35,074 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:29:35,074 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:29:35,074 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:29:35,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:29:35,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1881281357, now seen corresponding path program 42 times [2018-10-15 15:29:35,075 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:29:35,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:29:39,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10375 backedges. 0 proven. 10375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:29:39,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:29:39,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2018-10-15 15:29:39,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-15 15:29:39,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-15 15:29:39,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2018-10-15 15:29:39,200 INFO L87 Difference]: Start difference. First operand 267 states and 267 transitions. Second operand 87 states. [2018-10-15 15:29:39,812 WARN L179 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 10 [2018-10-15 15:29:40,076 WARN L179 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 9 [2018-10-15 15:29:40,347 WARN L179 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-10-15 15:29:40,610 WARN L179 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-10-15 15:29:40,884 WARN L179 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-10-15 15:29:41,213 WARN L179 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-10-15 15:29:41,491 WARN L179 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-10-15 15:29:41,774 WARN L179 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-10-15 15:29:42,074 WARN L179 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-15 15:29:42,365 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-15 15:29:42,663 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-15 15:29:42,956 WARN L179 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-15 15:29:43,248 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 15:29:43,541 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 15:29:43,863 WARN L179 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 15:29:44,175 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 15:29:44,511 WARN L179 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 15:29:44,840 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 15:29:45,163 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 15:29:45,502 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 15:29:45,838 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 15:29:46,234 WARN L179 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 15:29:46,591 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 15:29:46,928 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 15:29:47,272 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 15:29:47,622 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 15:29:47,964 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 15:29:48,313 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 15:29:48,648 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 15:29:48,990 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 15:29:49,335 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 15:29:49,673 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 15:29:50,002 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 15:29:50,353 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 15:29:50,680 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 15:29:51,030 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 15:29:51,391 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 15:29:51,746 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 15:30:03,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:30:03,060 INFO L93 Difference]: Finished difference Result 273 states and 273 transitions. [2018-10-15 15:30:03,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-15 15:30:03,060 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 266 [2018-10-15 15:30:03,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:30:03,062 INFO L225 Difference]: With dead ends: 273 [2018-10-15 15:30:03,062 INFO L226 Difference]: Without dead ends: 273 [2018-10-15 15:30:03,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3486 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=7479, Invalid=21591, Unknown=0, NotChecked=0, Total=29070 [2018-10-15 15:30:03,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-10-15 15:30:03,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2018-10-15 15:30:03,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2018-10-15 15:30:03,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 273 transitions. [2018-10-15 15:30:03,067 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 273 transitions. Word has length 266 [2018-10-15 15:30:03,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:30:03,067 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 273 transitions. [2018-10-15 15:30:03,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-15 15:30:03,067 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 273 transitions. [2018-10-15 15:30:03,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-10-15 15:30:03,068 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:30:03,068 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:30:03,068 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:30:03,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:30:03,069 INFO L82 PathProgramCache]: Analyzing trace with hash 750322573, now seen corresponding path program 43 times [2018-10-15 15:30:03,069 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:30:03,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:30:07,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10880 backedges. 0 proven. 10880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:30:07,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:30:07,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2018-10-15 15:30:07,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-15 15:30:07,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-15 15:30:07,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2018-10-15 15:30:07,531 INFO L87 Difference]: Start difference. First operand 273 states and 273 transitions. Second operand 89 states. [2018-10-15 15:30:08,159 WARN L179 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 10 [2018-10-15 15:30:08,419 WARN L179 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 9 [2018-10-15 15:30:08,710 WARN L179 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-10-15 15:30:08,991 WARN L179 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-10-15 15:30:09,284 WARN L179 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-10-15 15:30:09,567 WARN L179 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-10-15 15:30:09,861 WARN L179 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-10-15 15:30:10,162 WARN L179 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-10-15 15:30:10,459 WARN L179 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-10-15 15:30:10,755 WARN L179 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-10-15 15:30:11,063 WARN L179 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-15 15:30:11,381 WARN L179 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-15 15:30:11,705 WARN L179 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-15 15:30:12,059 WARN L179 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-15 15:30:12,391 WARN L179 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 15:30:12,710 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 15:30:13,051 WARN L179 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 15:30:13,407 WARN L179 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 15:30:13,755 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 15:30:14,126 WARN L179 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 15:30:14,485 WARN L179 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 15:30:14,836 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 15:30:15,192 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 15:30:15,539 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 15:30:15,915 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 15:30:16,285 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 15:30:16,646 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 15:30:17,040 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 15:30:17,391 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 15:30:17,739 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 15:30:18,084 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 15:30:18,448 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 15:30:18,792 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 15:30:19,139 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 15:30:19,483 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 15:30:19,841 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 15:30:20,188 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 15:30:20,528 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 15:30:20,863 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 15:30:21,855 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-10-15 15:30:22,202 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-10-15 15:30:32,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:30:32,897 INFO L93 Difference]: Finished difference Result 279 states and 279 transitions. [2018-10-15 15:30:32,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-15 15:30:32,897 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 272 [2018-10-15 15:30:32,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:30:32,899 INFO L225 Difference]: With dead ends: 279 [2018-10-15 15:30:32,899 INFO L226 Difference]: Without dead ends: 279 [2018-10-15 15:30:32,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3655 ImplicationChecksByTransitivity, 28.3s TimeCoverageRelationStatistics Valid=7829, Invalid=22621, Unknown=0, NotChecked=0, Total=30450 [2018-10-15 15:30:32,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-10-15 15:30:32,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2018-10-15 15:30:32,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-10-15 15:30:32,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 279 transitions. [2018-10-15 15:30:32,904 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 279 transitions. Word has length 272 [2018-10-15 15:30:32,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:30:32,905 INFO L481 AbstractCegarLoop]: Abstraction has 279 states and 279 transitions. [2018-10-15 15:30:32,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-15 15:30:32,905 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 279 transitions. [2018-10-15 15:30:32,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-10-15 15:30:32,906 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:30:32,906 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:30:32,907 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:30:32,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:30:32,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1310014515, now seen corresponding path program 44 times [2018-10-15 15:30:32,908 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:30:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:30:37,278 INFO L134 CoverageAnalysis]: Checked inductivity of 11397 backedges. 0 proven. 11397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:30:37,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:30:37,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2018-10-15 15:30:37,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-15 15:30:37,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-15 15:30:37,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=8011, Unknown=0, NotChecked=0, Total=8190 [2018-10-15 15:30:37,279 INFO L87 Difference]: Start difference. First operand 279 states and 279 transitions. Second operand 91 states. [2018-10-15 15:30:38,105 WARN L179 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 10 [2018-10-15 15:30:38,394 WARN L179 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 9 [2018-10-15 15:30:38,684 WARN L179 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2018-10-15 15:30:38,972 WARN L179 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2018-10-15 15:30:39,273 WARN L179 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-10-15 15:30:39,586 WARN L179 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-10-15 15:30:39,888 WARN L179 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-10-15 15:30:40,197 WARN L179 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-10-15 15:30:40,517 WARN L179 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-10-15 15:30:40,837 WARN L179 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-10-15 15:30:41,163 WARN L179 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-10-15 15:30:41,496 WARN L179 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-10-15 15:30:41,820 WARN L179 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-15 15:30:42,132 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-15 15:30:42,557 WARN L179 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-15 15:30:42,919 WARN L179 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-15 15:30:43,264 WARN L179 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 15:30:43,628 WARN L179 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 15:30:43,988 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 15:30:44,362 WARN L179 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 15:30:44,743 WARN L179 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 15:30:45,102 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 15:30:45,486 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 15:30:45,854 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 15:30:46,217 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 15:30:46,592 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 15:30:46,967 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 15:30:47,343 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 15:30:47,753 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 15:30:48,111 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 15:30:48,475 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 15:30:48,837 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 15:30:49,217 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 15:30:49,581 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 15:30:49,932 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 15:30:50,299 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 15:30:50,669 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 15:30:51,036 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 15:30:51,409 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 15:30:51,757 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 15:30:52,437 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 15:30:52,811 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-15 15:31:04,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:31:04,561 INFO L93 Difference]: Finished difference Result 285 states and 285 transitions. [2018-10-15 15:31:04,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-15 15:31:04,561 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 278 [2018-10-15 15:31:04,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:31:04,562 INFO L225 Difference]: With dead ends: 285 [2018-10-15 15:31:04,563 INFO L226 Difference]: Without dead ends: 285 [2018-10-15 15:31:04,563 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3828 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=8187, Invalid=23675, Unknown=0, NotChecked=0, Total=31862 [2018-10-15 15:31:04,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2018-10-15 15:31:04,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2018-10-15 15:31:04,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2018-10-15 15:31:04,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 285 transitions. [2018-10-15 15:31:04,567 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 285 transitions. Word has length 278 [2018-10-15 15:31:04,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:31:04,568 INFO L481 AbstractCegarLoop]: Abstraction has 285 states and 285 transitions. [2018-10-15 15:31:04,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-15 15:31:04,568 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 285 transitions. [2018-10-15 15:31:04,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2018-10-15 15:31:04,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:31:04,570 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:31:04,570 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:31:04,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:31:04,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1269083123, now seen corresponding path program 45 times [2018-10-15 15:31:04,571 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:31:05,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:31:09,569 INFO L134 CoverageAnalysis]: Checked inductivity of 11926 backedges. 0 proven. 11926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:31:09,570 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:31:09,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2018-10-15 15:31:09,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-15 15:31:09,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-15 15:31:09,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=8373, Unknown=0, NotChecked=0, Total=8556 [2018-10-15 15:31:09,571 INFO L87 Difference]: Start difference. First operand 285 states and 285 transitions. Second operand 93 states. [2018-10-15 15:31:10,235 WARN L179 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 10 [2018-10-15 15:31:10,531 WARN L179 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 9 [2018-10-15 15:31:10,835 WARN L179 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2018-10-15 15:31:11,132 WARN L179 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2018-10-15 15:31:11,440 WARN L179 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2018-10-15 15:31:11,754 WARN L179 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2018-10-15 15:31:12,076 WARN L179 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-10-15 15:31:12,406 WARN L179 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-10-15 15:31:12,730 WARN L179 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-10-15 15:31:13,054 WARN L179 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-10-15 15:31:13,413 WARN L179 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-10-15 15:31:13,749 WARN L179 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-10-15 15:31:14,089 WARN L179 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-10-15 15:31:14,418 WARN L179 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-10-15 15:31:14,800 WARN L179 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-15 15:31:15,158 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-15 15:31:15,519 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-15 15:31:15,902 WARN L179 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-15 15:31:16,266 WARN L179 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 15:31:16,647 WARN L179 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 15:31:17,042 WARN L179 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 15:31:17,422 WARN L179 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 15:31:17,815 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 15:31:18,209 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 15:31:18,606 WARN L179 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 15:31:18,992 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 15:31:19,370 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 15:31:19,754 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 15:31:20,132 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 15:31:20,518 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 15:31:20,887 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 15:31:21,269 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 15:31:21,654 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 15:31:22,062 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 15:31:22,421 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 15:31:22,788 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 15:31:23,164 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 15:31:23,555 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 15:31:23,945 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 15:31:24,329 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 15:31:24,692 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 15:31:25,066 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 15:31:25,430 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 15:31:38,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:31:38,095 INFO L93 Difference]: Finished difference Result 291 states and 291 transitions. [2018-10-15 15:31:38,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-15 15:31:38,096 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 284 [2018-10-15 15:31:38,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:31:38,097 INFO L225 Difference]: With dead ends: 291 [2018-10-15 15:31:38,097 INFO L226 Difference]: Without dead ends: 291 [2018-10-15 15:31:38,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4005 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=8553, Invalid=24753, Unknown=0, NotChecked=0, Total=33306 [2018-10-15 15:31:38,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-10-15 15:31:38,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2018-10-15 15:31:38,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-10-15 15:31:38,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 291 transitions. [2018-10-15 15:31:38,101 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 291 transitions. Word has length 284 [2018-10-15 15:31:38,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:31:38,101 INFO L481 AbstractCegarLoop]: Abstraction has 291 states and 291 transitions. [2018-10-15 15:31:38,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-15 15:31:38,101 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 291 transitions. [2018-10-15 15:31:38,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-10-15 15:31:38,102 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:31:38,102 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:31:38,102 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:31:38,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:31:38,103 INFO L82 PathProgramCache]: Analyzing trace with hash -575753139, now seen corresponding path program 46 times [2018-10-15 15:31:38,103 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:31:38,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:31:43,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12467 backedges. 0 proven. 12467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:31:43,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:31:43,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2018-10-15 15:31:43,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-15 15:31:43,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-15 15:31:43,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=8743, Unknown=0, NotChecked=0, Total=8930 [2018-10-15 15:31:43,006 INFO L87 Difference]: Start difference. First operand 291 states and 291 transitions. Second operand 95 states. [2018-10-15 15:31:43,702 WARN L179 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 10 [2018-10-15 15:31:44,054 WARN L179 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 9 [2018-10-15 15:31:44,390 WARN L179 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2018-10-15 15:31:44,713 WARN L179 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2018-10-15 15:31:45,040 WARN L179 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2018-10-15 15:31:45,347 WARN L179 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2018-10-15 15:31:45,681 WARN L179 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2018-10-15 15:31:45,997 WARN L179 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2018-10-15 15:31:46,338 WARN L179 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-10-15 15:31:46,679 WARN L179 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-10-15 15:31:47,020 WARN L179 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-10-15 15:31:47,368 WARN L179 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-10-15 15:31:47,705 WARN L179 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-10-15 15:31:48,049 WARN L179 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-10-15 15:31:48,461 WARN L179 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-10-15 15:31:48,845 WARN L179 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-10-15 15:31:49,233 WARN L179 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-15 15:31:49,621 WARN L179 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-15 15:31:50,006 WARN L179 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-15 15:31:50,401 WARN L179 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-15 15:31:50,813 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 15:31:51,208 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 15:31:51,616 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 15:31:52,025 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 15:31:52,439 WARN L179 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 15:31:52,844 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 15:31:53,255 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 15:31:53,672 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 15:31:54,073 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 15:31:54,489 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 15:31:54,891 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 15:31:55,286 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 15:31:55,680 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 15:31:56,130 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 15:31:56,511 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 15:31:56,905 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 15:31:57,302 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 15:31:57,704 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 15:31:58,082 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 15:31:58,460 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 15:31:58,842 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 15:31:59,245 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 15:31:59,647 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 15:32:00,026 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 15:32:13,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 15:32:13,422 INFO L93 Difference]: Finished difference Result 297 states and 297 transitions. [2018-10-15 15:32:13,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-15 15:32:13,423 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 290 [2018-10-15 15:32:13,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 15:32:13,424 INFO L225 Difference]: With dead ends: 297 [2018-10-15 15:32:13,424 INFO L226 Difference]: Without dead ends: 297 [2018-10-15 15:32:13,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4186 ImplicationChecksByTransitivity, 33.6s TimeCoverageRelationStatistics Valid=8927, Invalid=25855, Unknown=0, NotChecked=0, Total=34782 [2018-10-15 15:32:13,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2018-10-15 15:32:13,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2018-10-15 15:32:13,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2018-10-15 15:32:13,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 297 transitions. [2018-10-15 15:32:13,428 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 297 transitions. Word has length 290 [2018-10-15 15:32:13,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 15:32:13,429 INFO L481 AbstractCegarLoop]: Abstraction has 297 states and 297 transitions. [2018-10-15 15:32:13,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-15 15:32:13,429 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 297 transitions. [2018-10-15 15:32:13,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2018-10-15 15:32:13,430 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 15:32:13,430 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 15:32:13,430 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 15:32:13,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 15:32:13,431 INFO L82 PathProgramCache]: Analyzing trace with hash 210297997, now seen corresponding path program 47 times [2018-10-15 15:32:13,431 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 15:32:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 15:32:18,752 INFO L134 CoverageAnalysis]: Checked inductivity of 13020 backedges. 0 proven. 13020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 15:32:18,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 15:32:18,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2018-10-15 15:32:18,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-15 15:32:18,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-15 15:32:18,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=9121, Unknown=0, NotChecked=0, Total=9312 [2018-10-15 15:32:18,753 INFO L87 Difference]: Start difference. First operand 297 states and 297 transitions. Second operand 97 states. [2018-10-15 15:32:19,485 WARN L179 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 10 [2018-10-15 15:32:19,814 WARN L179 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 9 [2018-10-15 15:32:20,164 WARN L179 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2018-10-15 15:32:20,492 WARN L179 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2018-10-15 15:32:20,838 WARN L179 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2018-10-15 15:32:21,181 WARN L179 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11