java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplTransformed.xml -s ../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf -i ../../../trunk/examples/programs/20181015-LoopsPathprograms/count_by_k_true-unreach-call_true-termination.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2d08e6e [2018-10-15 12:55:35,440 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-15 12:55:35,442 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-15 12:55:35,456 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-10-15 12:55:35,501 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 12:55:35,520 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-15 12:55:35,521 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-15 12:55:35,522 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-15 12:55:35,522 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-15 12:55:35,522 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-15 12:55:35,522 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-15 12:55:35,523 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-15 12:55:35,524 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-15 12:55:35,524 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-15 12:55:35,524 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-15 12:55:35,524 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-15 12:55:35,524 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-15 12:55:35,524 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-15 12:55:35,526 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-15 12:55:35,526 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-15 12:55:35,596 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-15 12:55:35,610 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-15 12:55:35,615 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-15 12:55:35,617 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-15 12:55:35,618 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-15 12:55:35,618 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181015-LoopsPathprograms/count_by_k_true-unreach-call_true-termination.i_3.bpl [2018-10-15 12:55:35,619 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181015-LoopsPathprograms/count_by_k_true-unreach-call_true-termination.i_3.bpl' [2018-10-15 12:55:35,670 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-15 12:55:35,672 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-15 12:55:35,673 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-15 12:55:35,673 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-15 12:55:35,673 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-15 12:55:35,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_k_true-unreach-call_true-termination.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 12:55:35" (1/1) ... [2018-10-15 12:55:35,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_k_true-unreach-call_true-termination.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 12:55:35" (1/1) ... [2018-10-15 12:55:35,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_k_true-unreach-call_true-termination.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 12:55:35" (1/1) ... [2018-10-15 12:55:35,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_k_true-unreach-call_true-termination.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 12:55:35" (1/1) ... [2018-10-15 12:55:35,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_k_true-unreach-call_true-termination.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 12:55:35" (1/1) ... [2018-10-15 12:55:35,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_k_true-unreach-call_true-termination.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 12:55:35" (1/1) ... [2018-10-15 12:55:35,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_k_true-unreach-call_true-termination.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 12:55:35" (1/1) ... [2018-10-15 12:55:35,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-15 12:55:35,724 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-15 12:55:35,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-15 12:55:35,724 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-15 12:55:35,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_k_true-unreach-call_true-termination.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 12:55:35" (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 12:55:35,791 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-15 12:55:35,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-15 12:55:35,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-15 12:55:36,113 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-15 12:55:36,114 INFO L202 PluginConnector]: Adding new model count_by_k_true-unreach-call_true-termination.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:55:36 BoogieIcfgContainer [2018-10-15 12:55:36,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-15 12:55:36,114 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2018-10-15 12:55:36,115 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2018-10-15 12:55:36,115 INFO L276 PluginConnector]: IcfgTransformer initialized [2018-10-15 12:55:36,118 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "count_by_k_true-unreach-call_true-termination.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:55:36" (1/1) ... [2018-10-15 12:55:36,123 WARN L219 ansformationObserver]: HeapSeparator: input icfg has no '#valid' array -- returning unchanged Icfg! [2018-10-15 12:55:36,137 INFO L202 PluginConnector]: Adding new model count_by_k_true-unreach-call_true-termination.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 15.10 12:55:36 BasicIcfg [2018-10-15 12:55:36,137 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2018-10-15 12:55:36,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-15 12:55:36,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-15 12:55:36,142 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-15 12:55:36,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_k_true-unreach-call_true-termination.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 12:55:35" (1/3) ... [2018-10-15 12:55:36,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a9fc44b and model type count_by_k_true-unreach-call_true-termination.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:55:36, skipping insertion in model container [2018-10-15 12:55:36,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_k_true-unreach-call_true-termination.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:55:36" (2/3) ... [2018-10-15 12:55:36,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a9fc44b and model type count_by_k_true-unreach-call_true-termination.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 12:55:36, skipping insertion in model container [2018-10-15 12:55:36,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_k_true-unreach-call_true-termination.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 15.10 12:55:36" (3/3) ... [2018-10-15 12:55:36,146 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_k_true-unreach-call_true-termination.i_3.bplleft_unchanged_by_heapseparator [2018-10-15 12:55:36,157 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-10-15 12:55:36,166 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-15 12:55:36,184 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-15 12:55:36,219 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-15 12:55:36,220 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-15 12:55:36,220 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-15 12:55:36,220 INFO L384 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-10-15 12:55:36,220 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-15 12:55:36,221 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-15 12:55:36,221 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-15 12:55:36,221 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-15 12:55:36,221 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-15 12:55:36,242 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-10-15 12:55:36,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-15 12:55:36,258 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:55:36,259 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:55:36,261 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:55:36,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:55:36,270 INFO L82 PathProgramCache]: Analyzing trace with hash 343384320, now seen corresponding path program 1 times [2018-10-15 12:55:36,322 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:55:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:55:36,732 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 12:55:36,734 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-15 12:55:36,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-10-15 12:55:36,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-15 12:55:36,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-15 12:55:36,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-10-15 12:55:36,759 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 7 states. [2018-10-15 12:55:37,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:55:37,142 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-15 12:55:37,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-15 12:55:37,144 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2018-10-15 12:55:37,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:55:37,156 INFO L225 Difference]: With dead ends: 22 [2018-10-15 12:55:37,156 INFO L226 Difference]: Without dead ends: 18 [2018-10-15 12:55:37,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-10-15 12:55:37,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-15 12:55:37,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-15 12:55:37,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-15 12:55:37,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-15 12:55:37,195 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-10-15 12:55:37,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:55:37,196 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-15 12:55:37,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-15 12:55:37,196 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-15 12:55:37,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-15 12:55:37,197 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:55:37,197 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 12:55:37,198 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:55:37,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:55:37,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1792816354, now seen corresponding path program 1 times [2018-10-15 12:55:37,199 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:55:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:55:37,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:55:37,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:55:37,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-10-15 12:55:37,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-15 12:55:37,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-15 12:55:37,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-15 12:55:37,322 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 5 states. [2018-10-15 12:55:37,503 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2018-10-15 12:55:37,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:55:37,551 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-15 12:55:37,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-15 12:55:37,552 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-10-15 12:55:37,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:55:37,553 INFO L225 Difference]: With dead ends: 22 [2018-10-15 12:55:37,553 INFO L226 Difference]: Without dead ends: 22 [2018-10-15 12:55:37,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-15 12:55:37,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-15 12:55:37,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-15 12:55:37,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-15 12:55:37,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-15 12:55:37,559 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 17 [2018-10-15 12:55:37,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:55:37,559 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-15 12:55:37,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-15 12:55:37,559 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-15 12:55:37,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-15 12:55:37,560 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:55:37,560 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:55:37,561 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:55:37,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:55:37,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1656695590, now seen corresponding path program 2 times [2018-10-15 12:55:37,562 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:55:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:55:37,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:55:37,802 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:55:37,803 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-10-15 12:55:37,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-15 12:55:37,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-15 12:55:37,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-15 12:55:37,804 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 7 states. [2018-10-15 12:55:38,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:55:38,092 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-15 12:55:38,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-15 12:55:38,095 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2018-10-15 12:55:38,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:55:38,096 INFO L225 Difference]: With dead ends: 26 [2018-10-15 12:55:38,097 INFO L226 Difference]: Without dead ends: 26 [2018-10-15 12:55:38,097 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2018-10-15 12:55:38,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-15 12:55:38,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-15 12:55:38,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-15 12:55:38,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-15 12:55:38,105 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 21 [2018-10-15 12:55:38,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:55:38,106 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-15 12:55:38,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-15 12:55:38,106 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-15 12:55:38,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-15 12:55:38,107 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:55:38,107 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:55:38,108 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:55:38,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:55:38,109 INFO L82 PathProgramCache]: Analyzing trace with hash 670392170, now seen corresponding path program 3 times [2018-10-15 12:55:38,110 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:55:38,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:55:38,590 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:55:38,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:55:38,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-10-15 12:55:38,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-15 12:55:38,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-15 12:55:38,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-15 12:55:38,593 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 9 states. [2018-10-15 12:55:38,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:55:38,973 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-15 12:55:38,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-15 12:55:38,973 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2018-10-15 12:55:38,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:55:38,975 INFO L225 Difference]: With dead ends: 30 [2018-10-15 12:55:38,975 INFO L226 Difference]: Without dead ends: 30 [2018-10-15 12:55:38,976 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 12:55:38,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-15 12:55:38,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-15 12:55:38,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-15 12:55:38,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-15 12:55:38,981 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 25 [2018-10-15 12:55:38,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:55:38,981 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-15 12:55:38,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-15 12:55:38,982 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-15 12:55:38,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-15 12:55:38,983 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:55:38,983 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:55:38,983 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:55:38,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:55:38,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1118818734, now seen corresponding path program 4 times [2018-10-15 12:55:38,984 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:55:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:55:39,151 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:55:39,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:55:39,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-10-15 12:55:39,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-15 12:55:39,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-15 12:55:39,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-15 12:55:39,154 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 11 states. [2018-10-15 12:55:39,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:55:39,592 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-15 12:55:39,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-15 12:55:39,598 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2018-10-15 12:55:39,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:55:39,599 INFO L225 Difference]: With dead ends: 34 [2018-10-15 12:55:39,599 INFO L226 Difference]: Without dead ends: 34 [2018-10-15 12:55:39,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2018-10-15 12:55:39,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-15 12:55:39,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-15 12:55:39,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-15 12:55:39,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-15 12:55:39,605 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 29 [2018-10-15 12:55:39,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:55:39,606 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-15 12:55:39,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-15 12:55:39,606 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-15 12:55:39,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-15 12:55:39,607 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:55:39,607 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:55:39,608 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:55:39,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:55:39,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1163951630, now seen corresponding path program 5 times [2018-10-15 12:55:39,609 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:55:39,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:55:40,650 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:55:40,651 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:55:40,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-10-15 12:55:40,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-15 12:55:40,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-15 12:55:40,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-15 12:55:40,652 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 13 states. [2018-10-15 12:55:41,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:55:41,232 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-15 12:55:41,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-15 12:55:41,232 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2018-10-15 12:55:41,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:55:41,234 INFO L225 Difference]: With dead ends: 38 [2018-10-15 12:55:41,234 INFO L226 Difference]: Without dead ends: 38 [2018-10-15 12:55:41,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2018-10-15 12:55:41,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-15 12:55:41,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-15 12:55:41,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-15 12:55:41,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-15 12:55:41,239 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 33 [2018-10-15 12:55:41,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:55:41,240 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-15 12:55:41,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-15 12:55:41,240 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-15 12:55:41,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-15 12:55:41,241 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:55:41,241 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:55:41,242 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:55:41,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:55:41,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1458925622, now seen corresponding path program 6 times [2018-10-15 12:55:41,243 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:55:41,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:55:41,632 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:55:41,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:55:41,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-10-15 12:55:41,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-15 12:55:41,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-15 12:55:41,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-15 12:55:41,634 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 15 states. [2018-10-15 12:55:42,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:55:42,400 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-15 12:55:42,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-15 12:55:42,403 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2018-10-15 12:55:42,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:55:42,404 INFO L225 Difference]: With dead ends: 42 [2018-10-15 12:55:42,404 INFO L226 Difference]: Without dead ends: 42 [2018-10-15 12:55:42,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2018-10-15 12:55:42,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-15 12:55:42,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-15 12:55:42,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-15 12:55:42,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-15 12:55:42,409 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 37 [2018-10-15 12:55:42,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:55:42,410 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-15 12:55:42,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-15 12:55:42,410 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-15 12:55:42,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-15 12:55:42,412 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:55:42,412 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:55:42,412 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:55:42,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:55:42,413 INFO L82 PathProgramCache]: Analyzing trace with hash -563962758, now seen corresponding path program 7 times [2018-10-15 12:55:42,413 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:55:42,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:55:43,191 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:55:43,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:55:43,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-15 12:55:43,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-15 12:55:43,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-15 12:55:43,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-15 12:55:43,193 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 17 states. [2018-10-15 12:55:43,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:55:43,978 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-15 12:55:43,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-15 12:55:43,979 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2018-10-15 12:55:43,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:55:43,980 INFO L225 Difference]: With dead ends: 46 [2018-10-15 12:55:43,980 INFO L226 Difference]: Without dead ends: 46 [2018-10-15 12:55:43,981 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 12:55:43,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-15 12:55:43,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-15 12:55:43,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-15 12:55:43,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-15 12:55:43,988 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 41 [2018-10-15 12:55:43,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:55:43,988 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-15 12:55:43,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-15 12:55:43,989 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-15 12:55:43,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-15 12:55:43,990 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:55:43,990 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:55:43,990 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:55:43,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:55:43,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1461192382, now seen corresponding path program 8 times [2018-10-15 12:55:43,993 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:55:44,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:55:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:55:44,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:55:44,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-10-15 12:55:44,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-15 12:55:44,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-15 12:55:44,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-15 12:55:44,333 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 19 states. [2018-10-15 12:55:44,763 WARN L179 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 11 [2018-10-15 12:55:45,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:55:45,297 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-15 12:55:45,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-15 12:55:45,303 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2018-10-15 12:55:45,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:55:45,304 INFO L225 Difference]: With dead ends: 50 [2018-10-15 12:55:45,304 INFO L226 Difference]: Without dead ends: 50 [2018-10-15 12:55:45,305 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 12:55:45,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-15 12:55:45,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-15 12:55:45,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-15 12:55:45,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-15 12:55:45,311 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 45 [2018-10-15 12:55:45,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:55:45,311 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-15 12:55:45,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-15 12:55:45,312 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-15 12:55:45,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-15 12:55:45,312 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:55:45,312 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:55:45,316 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:55:45,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:55:45,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1187426050, now seen corresponding path program 9 times [2018-10-15 12:55:45,317 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:55:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:55:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:55:45,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:55:45,692 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-10-15 12:55:45,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-15 12:55:45,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-15 12:55:45,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-15 12:55:45,693 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 21 states. [2018-10-15 12:55:46,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:55:46,695 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-15 12:55:46,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-15 12:55:46,699 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 49 [2018-10-15 12:55:46,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:55:46,700 INFO L225 Difference]: With dead ends: 54 [2018-10-15 12:55:46,700 INFO L226 Difference]: Without dead ends: 54 [2018-10-15 12:55:46,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=417, Invalid=1065, Unknown=0, NotChecked=0, Total=1482 [2018-10-15 12:55:46,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-15 12:55:46,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-15 12:55:46,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-15 12:55:46,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-15 12:55:46,705 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 49 [2018-10-15 12:55:46,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:55:46,706 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-15 12:55:46,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-15 12:55:46,706 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-15 12:55:46,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-15 12:55:46,707 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:55:46,707 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:55:46,707 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:55:46,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:55:46,708 INFO L82 PathProgramCache]: Analyzing trace with hash -224422586, now seen corresponding path program 10 times [2018-10-15 12:55:46,708 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:55:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:55:47,421 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:55:47,422 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:55:47,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-10-15 12:55:47,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-15 12:55:47,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-15 12:55:47,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-15 12:55:47,423 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 23 states. [2018-10-15 12:55:48,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:55:48,585 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-15 12:55:48,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-15 12:55:48,585 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 53 [2018-10-15 12:55:48,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:55:48,586 INFO L225 Difference]: With dead ends: 58 [2018-10-15 12:55:48,587 INFO L226 Difference]: Without dead ends: 58 [2018-10-15 12:55:48,588 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 12:55:48,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-15 12:55:48,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-15 12:55:48,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-15 12:55:48,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-15 12:55:48,594 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 53 [2018-10-15 12:55:48,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:55:48,594 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-15 12:55:48,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-15 12:55:48,594 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-15 12:55:48,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-15 12:55:48,595 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:55:48,596 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:55:48,596 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:55:48,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:55:48,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1621902966, now seen corresponding path program 11 times [2018-10-15 12:55:48,597 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:55:48,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:55:49,083 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:55:49,083 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:55:49,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-10-15 12:55:49,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-15 12:55:49,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-15 12:55:49,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-15 12:55:49,084 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 25 states. [2018-10-15 12:55:50,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:55:50,787 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-15 12:55:50,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-15 12:55:50,787 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2018-10-15 12:55:50,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:55:50,788 INFO L225 Difference]: With dead ends: 62 [2018-10-15 12:55:50,788 INFO L226 Difference]: Without dead ends: 62 [2018-10-15 12:55:50,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=597, Invalid=1565, Unknown=0, NotChecked=0, Total=2162 [2018-10-15 12:55:50,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-15 12:55:50,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-15 12:55:50,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-15 12:55:50,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-15 12:55:50,794 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 57 [2018-10-15 12:55:50,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:55:50,794 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-15 12:55:50,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-15 12:55:50,794 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-15 12:55:50,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-15 12:55:50,795 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:55:50,796 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:55:50,796 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:55:50,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:55:50,796 INFO L82 PathProgramCache]: Analyzing trace with hash -787211314, now seen corresponding path program 12 times [2018-10-15 12:55:50,797 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:55:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:55:51,304 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:55:51,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:55:51,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-10-15 12:55:51,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-15 12:55:51,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-15 12:55:51,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-15 12:55:51,306 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 27 states. [2018-10-15 12:55:52,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:55:52,918 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-10-15 12:55:52,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-15 12:55:52,922 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 61 [2018-10-15 12:55:52,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:55:52,923 INFO L225 Difference]: With dead ends: 66 [2018-10-15 12:55:52,923 INFO L226 Difference]: Without dead ends: 66 [2018-10-15 12:55:52,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=699, Invalid=1851, Unknown=0, NotChecked=0, Total=2550 [2018-10-15 12:55:52,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-15 12:55:52,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-15 12:55:52,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-15 12:55:52,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-15 12:55:52,928 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 61 [2018-10-15 12:55:52,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:55:52,929 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-15 12:55:52,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-15 12:55:52,929 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-15 12:55:52,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-15 12:55:52,930 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:55:52,930 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:55:52,931 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:55:52,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:55:52,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1953383406, now seen corresponding path program 13 times [2018-10-15 12:55:52,932 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:55:52,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:55:53,406 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:55:53,406 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:55:53,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-10-15 12:55:53,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-15 12:55:53,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-15 12:55:53,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-15 12:55:53,408 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 29 states. [2018-10-15 12:55:53,675 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 10 [2018-10-15 12:55:55,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:55:55,340 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-15 12:55:55,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-15 12:55:55,341 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 65 [2018-10-15 12:55:55,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:55:55,341 INFO L225 Difference]: With dead ends: 70 [2018-10-15 12:55:55,341 INFO L226 Difference]: Without dead ends: 70 [2018-10-15 12:55:55,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=809, Invalid=2161, Unknown=0, NotChecked=0, Total=2970 [2018-10-15 12:55:55,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-15 12:55:55,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-15 12:55:55,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-15 12:55:55,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-15 12:55:55,347 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 65 [2018-10-15 12:55:55,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:55:55,347 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-15 12:55:55,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-15 12:55:55,347 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-15 12:55:55,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-15 12:55:55,348 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:55:55,348 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:55:55,349 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:55:55,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:55:55,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1845650858, now seen corresponding path program 14 times [2018-10-15 12:55:55,350 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:55:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:55:56,238 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:55:56,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:55:56,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-10-15 12:55:56,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-15 12:55:56,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-15 12:55:56,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-10-15 12:55:56,240 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 31 states. [2018-10-15 12:55:56,527 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 10 [2018-10-15 12:55:58,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:55:58,496 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-15 12:55:58,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-15 12:55:58,496 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 69 [2018-10-15 12:55:58,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:55:58,497 INFO L225 Difference]: With dead ends: 74 [2018-10-15 12:55:58,497 INFO L226 Difference]: Without dead ends: 74 [2018-10-15 12:55:58,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=927, Invalid=2495, Unknown=0, NotChecked=0, Total=3422 [2018-10-15 12:55:58,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-15 12:55:58,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-15 12:55:58,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-15 12:55:58,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-15 12:55:58,502 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 69 [2018-10-15 12:55:58,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:55:58,503 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-15 12:55:58,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-15 12:55:58,503 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-15 12:55:58,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-15 12:55:58,504 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:55:58,504 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:55:58,504 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:55:58,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:55:58,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1492601190, now seen corresponding path program 15 times [2018-10-15 12:55:58,505 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:55:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:55:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:55:59,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:55:59,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-10-15 12:55:59,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-15 12:55:59,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-15 12:55:59,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-10-15 12:55:59,462 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 33 states. [2018-10-15 12:56:01,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:56:01,654 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-10-15 12:56:01,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-15 12:56:01,655 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 73 [2018-10-15 12:56:01,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:56:01,656 INFO L225 Difference]: With dead ends: 78 [2018-10-15 12:56:01,656 INFO L226 Difference]: Without dead ends: 78 [2018-10-15 12:56:01,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1053, Invalid=2853, Unknown=0, NotChecked=0, Total=3906 [2018-10-15 12:56:01,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-15 12:56:01,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-15 12:56:01,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-15 12:56:01,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-15 12:56:01,662 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 73 [2018-10-15 12:56:01,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:56:01,662 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-15 12:56:01,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-15 12:56:01,662 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-15 12:56:01,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-15 12:56:01,663 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:56:01,663 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:56:01,664 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:56:01,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:56:01,664 INFO L82 PathProgramCache]: Analyzing trace with hash -857468706, now seen corresponding path program 16 times [2018-10-15 12:56:01,665 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:56:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:56:02,648 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:56:02,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:56:02,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-10-15 12:56:02,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-15 12:56:02,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-15 12:56:02,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-10-15 12:56:02,650 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 35 states. [2018-10-15 12:56:05,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:56:05,481 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-15 12:56:05,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-15 12:56:05,482 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 77 [2018-10-15 12:56:05,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:56:05,483 INFO L225 Difference]: With dead ends: 82 [2018-10-15 12:56:05,483 INFO L226 Difference]: Without dead ends: 82 [2018-10-15 12:56:05,484 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 12:56:05,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-15 12:56:05,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-15 12:56:05,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-15 12:56:05,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-15 12:56:05,488 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 77 [2018-10-15 12:56:05,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:56:05,489 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-15 12:56:05,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-15 12:56:05,489 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-15 12:56:05,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-15 12:56:05,490 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:56:05,490 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:56:05,490 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:56:05,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:56:05,491 INFO L82 PathProgramCache]: Analyzing trace with hash -2059359966, now seen corresponding path program 17 times [2018-10-15 12:56:05,491 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:56:05,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:56:07,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:56:07,259 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:56:07,260 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-10-15 12:56:07,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-15 12:56:07,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-15 12:56:07,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-10-15 12:56:07,261 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 37 states. [2018-10-15 12:56:10,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:56:10,049 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-15 12:56:10,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-15 12:56:10,050 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 81 [2018-10-15 12:56:10,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:56:10,051 INFO L225 Difference]: With dead ends: 86 [2018-10-15 12:56:10,051 INFO L226 Difference]: Without dead ends: 86 [2018-10-15 12:56:10,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1329, Invalid=3641, Unknown=0, NotChecked=0, Total=4970 [2018-10-15 12:56:10,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-15 12:56:10,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-15 12:56:10,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-15 12:56:10,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-15 12:56:10,056 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 81 [2018-10-15 12:56:10,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:56:10,057 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-15 12:56:10,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-15 12:56:10,057 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-15 12:56:10,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-15 12:56:10,058 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:56:10,058 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:56:10,058 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:56:10,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:56:10,059 INFO L82 PathProgramCache]: Analyzing trace with hash 290422630, now seen corresponding path program 18 times [2018-10-15 12:56:10,060 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:56:10,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:56:11,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:56:11,008 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:56:11,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-10-15 12:56:11,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-15 12:56:11,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-15 12:56:11,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-10-15 12:56:11,009 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 39 states. [2018-10-15 12:56:14,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:56:14,149 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-10-15 12:56:14,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-15 12:56:14,150 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 85 [2018-10-15 12:56:14,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:56:14,151 INFO L225 Difference]: With dead ends: 90 [2018-10-15 12:56:14,151 INFO L226 Difference]: Without dead ends: 90 [2018-10-15 12:56:14,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1479, Invalid=4071, Unknown=0, NotChecked=0, Total=5550 [2018-10-15 12:56:14,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-15 12:56:14,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-15 12:56:14,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-15 12:56:14,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-15 12:56:14,157 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 85 [2018-10-15 12:56:14,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:56:14,157 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-15 12:56:14,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-15 12:56:14,157 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-15 12:56:14,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-15 12:56:14,158 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:56:14,158 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:56:14,159 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:56:14,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:56:14,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1312713814, now seen corresponding path program 19 times [2018-10-15 12:56:14,160 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:56:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:56:15,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:56:15,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:56:15,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-10-15 12:56:15,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-15 12:56:15,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-15 12:56:15,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-10-15 12:56:15,026 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 41 states. [2018-10-15 12:56:18,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:56:18,653 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-10-15 12:56:18,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-15 12:56:18,654 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 89 [2018-10-15 12:56:18,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:56:18,655 INFO L225 Difference]: With dead ends: 94 [2018-10-15 12:56:18,655 INFO L226 Difference]: Without dead ends: 94 [2018-10-15 12:56:18,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1637, Invalid=4525, Unknown=0, NotChecked=0, Total=6162 [2018-10-15 12:56:18,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-15 12:56:18,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-15 12:56:18,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-15 12:56:18,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-15 12:56:18,660 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 89 [2018-10-15 12:56:18,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:56:18,660 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-15 12:56:18,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-15 12:56:18,661 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-15 12:56:18,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-15 12:56:18,661 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:56:18,661 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:56:18,662 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:56:18,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:56:18,662 INFO L82 PathProgramCache]: Analyzing trace with hash -423107090, now seen corresponding path program 20 times [2018-10-15 12:56:18,663 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:56:18,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:56:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:56:19,667 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:56:19,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-10-15 12:56:19,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-15 12:56:19,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-15 12:56:19,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-10-15 12:56:19,669 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 43 states. [2018-10-15 12:56:23,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:56:23,652 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-15 12:56:23,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-15 12:56:23,652 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 93 [2018-10-15 12:56:23,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:56:23,654 INFO L225 Difference]: With dead ends: 98 [2018-10-15 12:56:23,654 INFO L226 Difference]: Without dead ends: 98 [2018-10-15 12:56:23,657 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 12:56:23,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-15 12:56:23,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-15 12:56:23,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-15 12:56:23,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-15 12:56:23,660 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 93 [2018-10-15 12:56:23,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:56:23,660 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-15 12:56:23,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-15 12:56:23,660 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-15 12:56:23,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-15 12:56:23,661 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:56:23,661 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:56:23,661 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:56:23,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:56:23,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1340901838, now seen corresponding path program 21 times [2018-10-15 12:56:23,662 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:56:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:56:24,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:56:24,861 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:56:24,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-10-15 12:56:24,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-15 12:56:24,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-15 12:56:24,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-10-15 12:56:24,862 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 45 states. [2018-10-15 12:56:29,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:56:29,313 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-10-15 12:56:29,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-15 12:56:29,316 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 97 [2018-10-15 12:56:29,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:56:29,317 INFO L225 Difference]: With dead ends: 102 [2018-10-15 12:56:29,317 INFO L226 Difference]: Without dead ends: 102 [2018-10-15 12:56:29,318 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1977, Invalid=5505, Unknown=0, NotChecked=0, Total=7482 [2018-10-15 12:56:29,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-15 12:56:29,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-15 12:56:29,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-15 12:56:29,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-15 12:56:29,320 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 97 [2018-10-15 12:56:29,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:56:29,320 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-15 12:56:29,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-15 12:56:29,320 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-15 12:56:29,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-15 12:56:29,321 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:56:29,321 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:56:29,321 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:56:29,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:56:29,322 INFO L82 PathProgramCache]: Analyzing trace with hash -858438538, now seen corresponding path program 22 times [2018-10-15 12:56:29,323 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:56:29,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:56:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:56:30,570 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:56:30,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-10-15 12:56:30,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-15 12:56:30,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-15 12:56:30,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-10-15 12:56:30,571 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 47 states. [2018-10-15 12:56:35,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:56:35,378 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-10-15 12:56:35,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-15 12:56:35,378 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 101 [2018-10-15 12:56:35,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:56:35,380 INFO L225 Difference]: With dead ends: 106 [2018-10-15 12:56:35,380 INFO L226 Difference]: Without dead ends: 106 [2018-10-15 12:56:35,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2159, Invalid=6031, Unknown=0, NotChecked=0, Total=8190 [2018-10-15 12:56:35,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-15 12:56:35,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-15 12:56:35,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-15 12:56:35,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-10-15 12:56:35,384 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 101 [2018-10-15 12:56:35,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:56:35,384 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-10-15 12:56:35,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-15 12:56:35,384 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-10-15 12:56:35,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-15 12:56:35,385 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:56:35,385 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:56:35,385 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:56:35,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:56:35,386 INFO L82 PathProgramCache]: Analyzing trace with hash -71413574, now seen corresponding path program 23 times [2018-10-15 12:56:35,386 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:56:35,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:56:36,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:56:36,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:56:36,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-10-15 12:56:36,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-15 12:56:36,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-15 12:56:36,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-10-15 12:56:36,752 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 49 states. [2018-10-15 12:56:41,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:56:41,919 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-15 12:56:41,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-15 12:56:41,919 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 105 [2018-10-15 12:56:41,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:56:41,920 INFO L225 Difference]: With dead ends: 110 [2018-10-15 12:56:41,920 INFO L226 Difference]: Without dead ends: 110 [2018-10-15 12:56:41,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2349, Invalid=6581, Unknown=0, NotChecked=0, Total=8930 [2018-10-15 12:56:41,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-15 12:56:41,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-15 12:56:41,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-15 12:56:41,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-15 12:56:41,925 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 105 [2018-10-15 12:56:41,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:56:41,926 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-15 12:56:41,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-15 12:56:41,926 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-15 12:56:41,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-15 12:56:41,926 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:56:41,927 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:56:41,927 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:56:41,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:56:41,927 INFO L82 PathProgramCache]: Analyzing trace with hash 989829886, now seen corresponding path program 24 times [2018-10-15 12:56:41,928 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:56:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:56:43,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:56:43,260 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:56:43,260 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-10-15 12:56:43,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-15 12:56:43,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-15 12:56:43,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-10-15 12:56:43,261 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 51 states. [2018-10-15 12:56:43,743 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 10 [2018-10-15 12:56:43,975 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-15 12:56:44,238 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-10-15 12:56:49,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:56:49,284 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-10-15 12:56:49,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-15 12:56:49,287 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 109 [2018-10-15 12:56:49,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:56:49,289 INFO L225 Difference]: With dead ends: 114 [2018-10-15 12:56:49,289 INFO L226 Difference]: Without dead ends: 114 [2018-10-15 12:56:49,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=2547, Invalid=7155, Unknown=0, NotChecked=0, Total=9702 [2018-10-15 12:56:49,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-15 12:56:49,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-15 12:56:49,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-15 12:56:49,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-10-15 12:56:49,294 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 109 [2018-10-15 12:56:49,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:56:49,294 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-10-15 12:56:49,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-15 12:56:49,294 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-10-15 12:56:49,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-15 12:56:49,295 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:56:49,295 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:56:49,295 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:56:49,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:56:49,296 INFO L82 PathProgramCache]: Analyzing trace with hash 139076418, now seen corresponding path program 25 times [2018-10-15 12:56:49,296 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:56:49,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:56:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:56:50,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:56:50,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-10-15 12:56:50,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-15 12:56:50,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-15 12:56:50,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-10-15 12:56:50,872 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 53 states. [2018-10-15 12:56:51,190 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 10 [2018-10-15 12:56:51,307 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 9 [2018-10-15 12:56:51,430 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 12:56:51,555 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 12:56:57,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:56:57,122 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-10-15 12:56:57,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-15 12:56:57,123 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 113 [2018-10-15 12:56:57,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:56:57,124 INFO L225 Difference]: With dead ends: 118 [2018-10-15 12:56:57,124 INFO L226 Difference]: Without dead ends: 118 [2018-10-15 12:56:57,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=2753, Invalid=7753, Unknown=0, NotChecked=0, Total=10506 [2018-10-15 12:56:57,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-10-15 12:56:57,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-10-15 12:56:57,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-15 12:56:57,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-10-15 12:56:57,129 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 113 [2018-10-15 12:56:57,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:56:57,129 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-10-15 12:56:57,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-15 12:56:57,129 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-10-15 12:56:57,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-15 12:56:57,130 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:56:57,130 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:56:57,130 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:56:57,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:56:57,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1597052538, now seen corresponding path program 26 times [2018-10-15 12:56:57,131 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:56:57,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:56:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:56:59,313 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:56:59,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-10-15 12:56:59,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-15 12:56:59,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-15 12:56:59,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-10-15 12:56:59,315 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 55 states. [2018-10-15 12:56:59,654 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 10 [2018-10-15 12:56:59,772 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2018-10-15 12:56:59,897 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:57:00,035 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:57:00,588 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-10-15 12:57:06,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:57:06,202 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-10-15 12:57:06,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-15 12:57:06,202 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 117 [2018-10-15 12:57:06,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:57:06,203 INFO L225 Difference]: With dead ends: 122 [2018-10-15 12:57:06,203 INFO L226 Difference]: Without dead ends: 122 [2018-10-15 12:57:06,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=2967, Invalid=8375, Unknown=0, NotChecked=0, Total=11342 [2018-10-15 12:57:06,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-15 12:57:06,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-10-15 12:57:06,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-15 12:57:06,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-10-15 12:57:06,207 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 117 [2018-10-15 12:57:06,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:57:06,207 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-10-15 12:57:06,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-15 12:57:06,208 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-10-15 12:57:06,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-15 12:57:06,208 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:57:06,208 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:57:06,209 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:57:06,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:57:06,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1094643146, now seen corresponding path program 27 times [2018-10-15 12:57:06,210 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:57:06,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:57:08,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:57:08,261 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:57:08,261 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-10-15 12:57:08,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-15 12:57:08,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-15 12:57:08,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-10-15 12:57:08,262 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 57 states. [2018-10-15 12:57:08,620 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 10 [2018-10-15 12:57:08,748 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2018-10-15 12:57:08,879 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:57:09,038 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:57:09,191 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:57:09,340 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:57:09,492 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 12:57:09,643 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 12:57:09,798 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-15 12:57:15,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:57:15,872 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2018-10-15 12:57:15,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-15 12:57:15,873 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 121 [2018-10-15 12:57:15,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:57:15,874 INFO L225 Difference]: With dead ends: 126 [2018-10-15 12:57:15,874 INFO L226 Difference]: Without dead ends: 126 [2018-10-15 12:57:15,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=3189, Invalid=9021, Unknown=0, NotChecked=0, Total=12210 [2018-10-15 12:57:15,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-15 12:57:15,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-10-15 12:57:15,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-15 12:57:15,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-10-15 12:57:15,879 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 121 [2018-10-15 12:57:15,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:57:15,879 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-10-15 12:57:15,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-15 12:57:15,879 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-10-15 12:57:15,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-15 12:57:15,880 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:57:15,880 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:57:15,880 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:57:15,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:57:15,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1707814926, now seen corresponding path program 28 times [2018-10-15 12:57:15,881 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:57:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:57:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:57:17,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:57:17,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-10-15 12:57:17,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-15 12:57:17,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-15 12:57:17,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-10-15 12:57:17,677 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 59 states. [2018-10-15 12:57:18,052 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 10 [2018-10-15 12:57:18,189 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 9 [2018-10-15 12:57:18,330 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 12:57:18,479 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 12:57:18,628 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:57:18,777 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:57:18,933 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:57:19,256 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 12:57:19,435 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 12:57:26,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:57:26,235 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-10-15 12:57:26,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-15 12:57:26,236 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 125 [2018-10-15 12:57:26,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:57:26,237 INFO L225 Difference]: With dead ends: 130 [2018-10-15 12:57:26,237 INFO L226 Difference]: Without dead ends: 130 [2018-10-15 12:57:26,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=3419, Invalid=9691, Unknown=0, NotChecked=0, Total=13110 [2018-10-15 12:57:26,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-10-15 12:57:26,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-10-15 12:57:26,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-15 12:57:26,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-10-15 12:57:26,241 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 125 [2018-10-15 12:57:26,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:57:26,241 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-10-15 12:57:26,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-15 12:57:26,241 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-10-15 12:57:26,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-10-15 12:57:26,242 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:57:26,242 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:57:26,242 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:57:26,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:57:26,243 INFO L82 PathProgramCache]: Analyzing trace with hash 170176594, now seen corresponding path program 29 times [2018-10-15 12:57:26,243 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:57:26,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:57:28,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:57:28,855 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:57:28,855 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-10-15 12:57:28,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-15 12:57:28,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-15 12:57:28,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-10-15 12:57:28,856 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 61 states. [2018-10-15 12:57:29,232 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 10 [2018-10-15 12:57:29,376 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 9 [2018-10-15 12:57:29,561 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 12:57:29,751 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 12:57:29,910 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 12:57:30,064 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 12:57:30,223 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:57:30,381 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:57:30,546 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:57:30,717 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:57:30,894 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 12:57:37,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:57:37,912 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-10-15 12:57:37,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-15 12:57:37,913 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 129 [2018-10-15 12:57:37,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:57:37,915 INFO L225 Difference]: With dead ends: 134 [2018-10-15 12:57:37,915 INFO L226 Difference]: Without dead ends: 134 [2018-10-15 12:57:37,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=3657, Invalid=10385, Unknown=0, NotChecked=0, Total=14042 [2018-10-15 12:57:37,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-15 12:57:37,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-10-15 12:57:37,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-15 12:57:37,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-10-15 12:57:37,919 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 129 [2018-10-15 12:57:37,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:57:37,919 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-10-15 12:57:37,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-15 12:57:37,919 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-10-15 12:57:37,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-15 12:57:37,920 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:57:37,920 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:57:37,921 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:57:37,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:57:37,921 INFO L82 PathProgramCache]: Analyzing trace with hash -377721194, now seen corresponding path program 30 times [2018-10-15 12:57:37,922 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:57:38,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:57:40,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:57:40,181 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:57:40,181 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-10-15 12:57:40,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-15 12:57:40,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-15 12:57:40,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-10-15 12:57:40,182 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 63 states. [2018-10-15 12:57:40,577 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 10 [2018-10-15 12:57:40,737 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 9 [2018-10-15 12:57:40,895 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 12:57:41,065 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 12:57:41,227 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 12:57:41,397 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 12:57:41,570 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 12:57:41,736 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 12:57:41,913 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:57:42,103 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:57:42,275 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:57:50,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:57:50,102 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2018-10-15 12:57:50,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-15 12:57:50,103 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 133 [2018-10-15 12:57:50,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:57:50,104 INFO L225 Difference]: With dead ends: 138 [2018-10-15 12:57:50,104 INFO L226 Difference]: Without dead ends: 138 [2018-10-15 12:57:50,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=3903, Invalid=11103, Unknown=0, NotChecked=0, Total=15006 [2018-10-15 12:57:50,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-15 12:57:50,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-10-15 12:57:50,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-10-15 12:57:50,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-10-15 12:57:50,109 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 133 [2018-10-15 12:57:50,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:57:50,109 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-10-15 12:57:50,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-15 12:57:50,110 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-10-15 12:57:50,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-15 12:57:50,110 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:57:50,111 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:57:50,111 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:57:50,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:57:50,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1098683686, now seen corresponding path program 31 times [2018-10-15 12:57:50,112 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:57:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:57:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:57:52,455 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:57:52,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-10-15 12:57:52,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-15 12:57:52,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-15 12:57:52,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-10-15 12:57:52,456 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 65 states. [2018-10-15 12:57:52,867 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 10 [2018-10-15 12:57:53,021 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 9 [2018-10-15 12:57:53,180 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 12:57:53,355 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 12:57:53,522 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 12:57:53,694 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 12:57:53,870 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 12:57:54,045 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 12:57:54,222 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 12:57:54,414 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 12:57:54,599 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:57:54,787 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:57:54,974 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:57:55,192 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:57:55,392 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 12:58:03,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:58:03,255 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-10-15 12:58:03,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-15 12:58:03,256 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 137 [2018-10-15 12:58:03,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:58:03,257 INFO L225 Difference]: With dead ends: 142 [2018-10-15 12:58:03,257 INFO L226 Difference]: Without dead ends: 142 [2018-10-15 12:58:03,258 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=4157, Invalid=11845, Unknown=0, NotChecked=0, Total=16002 [2018-10-15 12:58:03,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-10-15 12:58:03,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-10-15 12:58:03,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-15 12:58:03,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-10-15 12:58:03,262 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 137 [2018-10-15 12:58:03,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:58:03,262 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-10-15 12:58:03,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-15 12:58:03,262 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-10-15 12:58:03,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-15 12:58:03,263 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:58:03,263 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:58:03,263 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:58:03,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:58:03,264 INFO L82 PathProgramCache]: Analyzing trace with hash -2090162914, now seen corresponding path program 32 times [2018-10-15 12:58:03,264 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:58:03,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:58:05,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:58:05,725 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:58:05,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-10-15 12:58:05,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-15 12:58:05,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-15 12:58:05,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-10-15 12:58:05,727 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 67 states. [2018-10-15 12:58:06,151 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 10 [2018-10-15 12:58:06,321 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 9 [2018-10-15 12:58:06,505 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 12:58:06,692 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 12:58:06,870 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 12:58:07,050 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 12:58:07,234 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 12:58:07,427 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 12:58:07,608 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 12:58:07,804 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 12:58:07,999 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 12:58:08,194 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 12:58:08,388 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:58:08,593 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:58:08,986 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:58:09,392 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 12:58:10,440 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2018-10-15 12:58:10,675 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 11 [2018-10-15 12:58:17,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:58:17,229 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-10-15 12:58:17,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-15 12:58:17,230 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 141 [2018-10-15 12:58:17,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:58:17,231 INFO L225 Difference]: With dead ends: 146 [2018-10-15 12:58:17,231 INFO L226 Difference]: Without dead ends: 146 [2018-10-15 12:58:17,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=4419, Invalid=12611, Unknown=0, NotChecked=0, Total=17030 [2018-10-15 12:58:17,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-15 12:58:17,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-10-15 12:58:17,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-10-15 12:58:17,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-10-15 12:58:17,236 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 141 [2018-10-15 12:58:17,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:58:17,236 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-10-15 12:58:17,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-15 12:58:17,236 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-10-15 12:58:17,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-15 12:58:17,237 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:58:17,237 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:58:17,237 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:58:17,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:58:17,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1310515870, now seen corresponding path program 33 times [2018-10-15 12:58:17,238 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:58:17,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:58:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:58:19,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:58:19,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-10-15 12:58:19,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-15 12:58:19,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-15 12:58:19,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-10-15 12:58:19,913 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 69 states. [2018-10-15 12:58:20,353 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 10 [2018-10-15 12:58:20,528 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 9 [2018-10-15 12:58:20,730 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 12:58:20,942 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 12:58:21,135 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 12:58:21,326 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 12:58:21,517 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 12:58:21,716 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 12:58:21,914 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 12:58:22,117 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 12:58:22,321 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 12:58:22,532 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 12:58:22,735 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 12:58:22,948 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 12:58:23,157 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:58:23,380 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:58:23,595 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:58:23,805 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:58:24,021 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 12:58:24,245 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 12:58:24,690 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-10-15 12:58:32,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:58:32,407 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2018-10-15 12:58:32,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-15 12:58:32,408 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 145 [2018-10-15 12:58:32,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:58:32,409 INFO L225 Difference]: With dead ends: 150 [2018-10-15 12:58:32,409 INFO L226 Difference]: Without dead ends: 150 [2018-10-15 12:58:32,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=4689, Invalid=13401, Unknown=0, NotChecked=0, Total=18090 [2018-10-15 12:58:32,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-15 12:58:32,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-10-15 12:58:32,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-15 12:58:32,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-10-15 12:58:32,413 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 145 [2018-10-15 12:58:32,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:58:32,414 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-10-15 12:58:32,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-15 12:58:32,414 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-10-15 12:58:32,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-15 12:58:32,415 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:58:32,415 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:58:32,415 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:58:32,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:58:32,416 INFO L82 PathProgramCache]: Analyzing trace with hash -2095197274, now seen corresponding path program 34 times [2018-10-15 12:58:32,416 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:58:32,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:58:35,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:58:35,244 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:58:35,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-10-15 12:58:35,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-15 12:58:35,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-15 12:58:35,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-10-15 12:58:35,245 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 71 states. [2018-10-15 12:58:35,721 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 10 [2018-10-15 12:58:35,904 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 9 [2018-10-15 12:58:36,122 WARN L179 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 12:58:36,339 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 12:58:36,527 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 12:58:36,731 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 12:58:36,949 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 12:58:37,163 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 12:58:37,372 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 12:58:37,583 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 12:58:37,805 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 12:58:38,037 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 12:58:38,255 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 12:58:38,478 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 12:58:38,697 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 12:58:38,917 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 12:58:39,138 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:58:39,362 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:58:39,582 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:58:39,807 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:58:40,244 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 12:58:41,158 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-10-15 12:58:41,410 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2018-10-15 12:58:48,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:58:48,811 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-10-15 12:58:48,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-15 12:58:48,812 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 149 [2018-10-15 12:58:48,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:58:48,813 INFO L225 Difference]: With dead ends: 154 [2018-10-15 12:58:48,813 INFO L226 Difference]: Without dead ends: 154 [2018-10-15 12:58:48,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=4967, Invalid=14215, Unknown=0, NotChecked=0, Total=19182 [2018-10-15 12:58:48,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-10-15 12:58:48,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-10-15 12:58:48,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-15 12:58:48,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-10-15 12:58:48,817 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 149 [2018-10-15 12:58:48,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:58:48,818 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-10-15 12:58:48,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-15 12:58:48,818 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-10-15 12:58:48,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-15 12:58:48,819 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:58:48,819 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:58:48,819 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:58:48,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:58:48,819 INFO L82 PathProgramCache]: Analyzing trace with hash 801884138, now seen corresponding path program 35 times [2018-10-15 12:58:48,820 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:58:49,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:58:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:58:51,862 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:58:51,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-10-15 12:58:51,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-15 12:58:51,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-15 12:58:51,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-10-15 12:58:51,863 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 73 states. [2018-10-15 12:58:52,349 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 10 [2018-10-15 12:58:52,541 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 9 [2018-10-15 12:58:52,738 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 12:58:52,948 WARN L179 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 12:58:53,155 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 12:58:53,360 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 12:58:53,583 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 12:58:53,799 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 12:58:54,020 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 12:58:54,241 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 12:58:54,457 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 12:58:54,685 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 12:58:54,915 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 12:58:55,142 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 12:58:55,360 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 12:58:55,587 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 12:58:55,821 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 12:58:56,059 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 12:58:56,295 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:58:56,542 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:58:56,793 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:58:57,022 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:58:57,488 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 12:58:57,953 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-10-15 12:59:06,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:59:06,062 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-10-15 12:59:06,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-15 12:59:06,062 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 153 [2018-10-15 12:59:06,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:59:06,064 INFO L225 Difference]: With dead ends: 158 [2018-10-15 12:59:06,064 INFO L226 Difference]: Without dead ends: 158 [2018-10-15 12:59:06,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=5253, Invalid=15053, Unknown=0, NotChecked=0, Total=20306 [2018-10-15 12:59:06,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-15 12:59:06,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-10-15 12:59:06,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-15 12:59:06,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-10-15 12:59:06,067 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 153 [2018-10-15 12:59:06,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:59:06,068 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-10-15 12:59:06,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-15 12:59:06,068 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-10-15 12:59:06,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-15 12:59:06,069 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:59:06,069 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:59:06,069 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:59:06,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:59:06,070 INFO L82 PathProgramCache]: Analyzing trace with hash 807270958, now seen corresponding path program 36 times [2018-10-15 12:59:06,070 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:59:06,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:59:09,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:59:09,606 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:59:09,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2018-10-15 12:59:09,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-15 12:59:09,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-15 12:59:09,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2018-10-15 12:59:09,607 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 75 states. [2018-10-15 12:59:10,093 WARN L179 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 10 [2018-10-15 12:59:10,294 WARN L179 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 9 [2018-10-15 12:59:10,494 WARN L179 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 12:59:10,706 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 12:59:10,930 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 12:59:11,143 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 12:59:11,367 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 12:59:11,582 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 12:59:11,819 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 12:59:12,080 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 12:59:12,304 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 12:59:12,540 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 12:59:12,776 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 12:59:13,012 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 12:59:13,252 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 12:59:13,492 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 12:59:13,735 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 12:59:13,985 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 12:59:14,240 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 12:59:14,486 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 12:59:14,732 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:59:14,981 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:59:15,227 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:59:15,475 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:59:17,000 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-10-15 12:59:22,632 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 11 [2018-10-15 12:59:25,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:59:25,254 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2018-10-15 12:59:25,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-15 12:59:25,254 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 157 [2018-10-15 12:59:25,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:59:25,255 INFO L225 Difference]: With dead ends: 162 [2018-10-15 12:59:25,255 INFO L226 Difference]: Without dead ends: 162 [2018-10-15 12:59:25,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=5547, Invalid=15915, Unknown=0, NotChecked=0, Total=21462 [2018-10-15 12:59:25,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-15 12:59:25,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-10-15 12:59:25,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-10-15 12:59:25,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-10-15 12:59:25,259 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 157 [2018-10-15 12:59:25,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:59:25,260 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-10-15 12:59:25,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-15 12:59:25,260 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-10-15 12:59:25,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-15 12:59:25,261 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:59:25,261 INFO L375 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:59:25,261 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:59:25,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:59:25,262 INFO L82 PathProgramCache]: Analyzing trace with hash 2076535410, now seen corresponding path program 37 times [2018-10-15 12:59:25,264 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:59:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:59:28,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:59:28,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:59:28,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2018-10-15 12:59:28,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-15 12:59:28,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-15 12:59:28,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2018-10-15 12:59:28,784 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 77 states. [2018-10-15 12:59:29,284 WARN L179 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 10 [2018-10-15 12:59:29,490 WARN L179 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 9 [2018-10-15 12:59:29,716 WARN L179 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 12:59:29,934 WARN L179 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 12:59:30,151 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 12:59:30,373 WARN L179 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 12:59:30,613 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 12:59:30,878 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 12:59:31,111 WARN L179 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 12:59:31,360 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 12:59:31,614 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 12:59:31,857 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 12:59:32,104 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 12:59:32,375 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 12:59:32,652 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 12:59:32,903 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 12:59:33,159 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 12:59:33,429 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 12:59:33,681 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 12:59:33,941 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 12:59:34,199 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 12:59:34,463 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 12:59:34,718 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:59:34,970 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:59:35,238 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:59:35,513 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:59:35,785 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 12:59:36,047 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 12:59:45,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:59:45,686 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2018-10-15 12:59:45,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-15 12:59:45,687 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 161 [2018-10-15 12:59:45,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:59:45,688 INFO L225 Difference]: With dead ends: 166 [2018-10-15 12:59:45,688 INFO L226 Difference]: Without dead ends: 166 [2018-10-15 12:59:45,689 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 12:59:45,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-10-15 12:59:45,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-10-15 12:59:45,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-10-15 12:59:45,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2018-10-15 12:59:45,692 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 161 [2018-10-15 12:59:45,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:59:45,692 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2018-10-15 12:59:45,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-15 12:59:45,692 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2018-10-15 12:59:45,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-15 12:59:45,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:59:45,693 INFO L375 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:59:45,694 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:59:45,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:59:45,694 INFO L82 PathProgramCache]: Analyzing trace with hash -906815306, now seen corresponding path program 38 times [2018-10-15 12:59:45,695 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:59:46,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:59:49,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:59:49,159 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:59:49,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2018-10-15 12:59:49,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-15 12:59:49,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-15 12:59:49,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2018-10-15 12:59:49,160 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand 79 states. [2018-10-15 12:59:49,685 WARN L179 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 10 [2018-10-15 12:59:49,894 WARN L179 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 9 [2018-10-15 12:59:50,120 WARN L179 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-15 12:59:50,346 WARN L179 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-15 12:59:50,582 WARN L179 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 12:59:50,822 WARN L179 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 12:59:51,065 WARN L179 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 12:59:51,310 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 12:59:51,568 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 12:59:51,835 WARN L179 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 12:59:52,104 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 12:59:52,369 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 12:59:52,638 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 12:59:52,910 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 12:59:53,183 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 12:59:53,444 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 12:59:53,710 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 12:59:53,996 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 12:59:54,258 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 12:59:54,529 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 12:59:54,796 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 12:59:55,065 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 12:59:55,339 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 12:59:55,610 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 12:59:55,882 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:59:56,161 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:59:56,433 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:59:56,702 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:59:56,973 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 12:59:58,093 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-10-15 13:00:06,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:00:06,961 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2018-10-15 13:00:06,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-15 13:00:06,961 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 165 [2018-10-15 13:00:06,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:00:06,962 INFO L225 Difference]: With dead ends: 170 [2018-10-15 13:00:06,963 INFO L226 Difference]: Without dead ends: 170 [2018-10-15 13:00:06,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=6159, Invalid=17711, Unknown=0, NotChecked=0, Total=23870 [2018-10-15 13:00:06,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-15 13:00:06,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2018-10-15 13:00:06,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-10-15 13:00:06,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2018-10-15 13:00:06,967 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 165 [2018-10-15 13:00:06,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:00:06,967 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2018-10-15 13:00:06,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-15 13:00:06,967 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2018-10-15 13:00:06,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-10-15 13:00:06,968 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:00:06,968 INFO L375 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:00:06,969 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:00:06,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:00:06,969 INFO L82 PathProgramCache]: Analyzing trace with hash -782760710, now seen corresponding path program 39 times [2018-10-15 13:00:06,970 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:00:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:00:10,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:00:10,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:00:10,625 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2018-10-15 13:00:10,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-15 13:00:10,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-15 13:00:10,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2018-10-15 13:00:10,625 INFO L87 Difference]: Start difference. First operand 170 states and 170 transitions. Second operand 81 states. [2018-10-15 13:00:11,192 WARN L179 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 10 [2018-10-15 13:00:11,417 WARN L179 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 9 [2018-10-15 13:00:11,654 WARN L179 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-15 13:00:11,903 WARN L179 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-15 13:00:12,147 WARN L179 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-15 13:00:12,398 WARN L179 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-15 13:00:12,663 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 13:00:12,914 WARN L179 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 13:00:13,170 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 13:00:13,448 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 13:00:13,735 WARN L179 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 13:00:14,006 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 13:00:14,282 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 13:00:14,557 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 13:00:14,829 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 13:00:15,108 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 13:00:15,388 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 13:00:15,669 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 13:00:15,948 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 13:00:16,223 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 13:00:16,499 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 13:00:16,776 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 13:00:17,049 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 13:00:17,335 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 13:00:17,618 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 13:00:17,895 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 13:00:18,168 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 13:00:18,478 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 13:00:18,779 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 13:00:19,058 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 13:00:19,620 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 13:00:29,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:00:29,621 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2018-10-15 13:00:29,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-15 13:00:29,621 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 169 [2018-10-15 13:00:29,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:00:29,622 INFO L225 Difference]: With dead ends: 174 [2018-10-15 13:00:29,622 INFO L226 Difference]: Without dead ends: 174 [2018-10-15 13:00:29,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3003 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=6477, Invalid=18645, Unknown=0, NotChecked=0, Total=25122 [2018-10-15 13:00:29,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-10-15 13:00:29,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2018-10-15 13:00:29,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-10-15 13:00:29,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2018-10-15 13:00:29,626 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 169 [2018-10-15 13:00:29,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:00:29,626 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2018-10-15 13:00:29,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-15 13:00:29,626 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2018-10-15 13:00:29,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-15 13:00:29,627 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:00:29,627 INFO L375 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:00:29,628 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:00:29,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:00:29,628 INFO L82 PathProgramCache]: Analyzing trace with hash -2010828994, now seen corresponding path program 40 times [2018-10-15 13:00:29,628 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:00:30,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:00:33,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:00:33,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:00:33,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2018-10-15 13:00:33,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-15 13:00:33,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-15 13:00:33,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2018-10-15 13:00:33,515 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand 83 states. [2018-10-15 13:00:34,193 WARN L179 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 10 [2018-10-15 13:00:34,432 WARN L179 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 9 [2018-10-15 13:00:34,668 WARN L179 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-10-15 13:00:34,916 WARN L179 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-10-15 13:00:35,164 WARN L179 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-15 13:00:35,426 WARN L179 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-15 13:00:35,687 WARN L179 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-15 13:00:35,961 WARN L179 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-15 13:00:36,226 WARN L179 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 13:00:36,490 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 13:00:36,764 WARN L179 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 13:00:37,037 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 13:00:37,321 WARN L179 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 13:00:37,606 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 13:00:37,904 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 13:00:38,185 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 13:00:38,473 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 13:00:38,771 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 13:00:39,114 WARN L179 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 13:00:39,405 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 13:00:39,684 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 13:00:39,991 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 13:00:40,284 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 13:00:40,579 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 13:00:40,869 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 13:00:41,161 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 13:00:41,451 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 13:00:41,753 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 13:00:42,054 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 13:00:42,361 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 13:00:42,658 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 13:00:42,968 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 13:00:43,567 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 13:00:43,871 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-15 13:00:44,179 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-10-15 13:00:53,812 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2018-10-15 13:00:54,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:00:54,576 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2018-10-15 13:00:54,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-15 13:00:54,576 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 173 [2018-10-15 13:00:54,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:00:54,577 INFO L225 Difference]: With dead ends: 178 [2018-10-15 13:00:54,577 INFO L226 Difference]: Without dead ends: 178 [2018-10-15 13:00:54,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3160 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=6803, Invalid=19603, Unknown=0, NotChecked=0, Total=26406 [2018-10-15 13:00:54,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-10-15 13:00:54,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-10-15 13:00:54,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-10-15 13:00:54,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2018-10-15 13:00:54,581 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 173 [2018-10-15 13:00:54,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:00:54,582 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2018-10-15 13:00:54,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-15 13:00:54,582 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2018-10-15 13:00:54,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-15 13:00:54,583 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:00:54,583 INFO L375 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:00:54,583 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:00:54,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:00:54,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1678481282, now seen corresponding path program 41 times [2018-10-15 13:00:54,584 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:00:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:00:58,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:00:58,313 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:00:58,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2018-10-15 13:00:58,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-15 13:00:58,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-15 13:00:58,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2018-10-15 13:00:58,314 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand 85 states. [2018-10-15 13:00:58,886 WARN L179 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 10 [2018-10-15 13:00:59,139 WARN L179 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 9 [2018-10-15 13:00:59,415 WARN L179 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-10-15 13:00:59,709 WARN L179 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-10-15 13:00:59,961 WARN L179 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-10-15 13:01:00,217 WARN L179 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-10-15 13:01:00,498 WARN L179 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-15 13:01:00,772 WARN L179 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-15 13:01:01,064 WARN L179 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-15 13:01:01,347 WARN L179 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-15 13:01:01,625 WARN L179 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 13:01:01,920 WARN L179 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 13:01:02,213 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 13:01:02,511 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 13:01:02,806 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 13:01:03,117 WARN L179 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 13:01:03,420 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 13:01:03,722 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 13:01:04,030 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 13:01:04,328 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 13:01:04,651 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 13:01:04,966 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 13:01:05,269 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 13:01:05,581 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 13:01:05,891 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 13:01:06,199 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 13:01:06,512 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 13:01:06,843 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 13:01:07,146 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 13:01:07,450 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 13:01:07,766 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 13:01:08,087 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 13:01:08,404 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 13:01:08,710 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 13:01:09,030 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 13:01:09,660 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-15 13:01:09,974 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-10-15 13:01:19,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:01:19,797 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2018-10-15 13:01:19,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-15 13:01:19,797 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 177 [2018-10-15 13:01:19,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:01:19,798 INFO L225 Difference]: With dead ends: 182 [2018-10-15 13:01:19,798 INFO L226 Difference]: Without dead ends: 182 [2018-10-15 13:01:19,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=7137, Invalid=20585, Unknown=0, NotChecked=0, Total=27722 [2018-10-15 13:01:19,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-15 13:01:19,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2018-10-15 13:01:19,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-10-15 13:01:19,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2018-10-15 13:01:19,801 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 177 [2018-10-15 13:01:19,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:01:19,802 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2018-10-15 13:01:19,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-15 13:01:19,802 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2018-10-15 13:01:19,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-10-15 13:01:19,802 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:01:19,803 INFO L375 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:01:19,803 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:01:19,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:01:19,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1707328058, now seen corresponding path program 42 times [2018-10-15 13:01:19,804 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:01:20,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:01:23,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:01:23,710 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:01:23,710 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2018-10-15 13:01:23,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-15 13:01:23,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-15 13:01:23,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2018-10-15 13:01:23,711 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand 87 states. [2018-10-15 13:01:24,416 WARN L179 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 10 [2018-10-15 13:01:24,682 WARN L179 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 9 [2018-10-15 13:01:24,945 WARN L179 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-10-15 13:01:25,241 WARN L179 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-10-15 13:01:25,513 WARN L179 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-10-15 13:01:25,792 WARN L179 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-10-15 13:01:26,089 WARN L179 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-10-15 13:01:26,378 WARN L179 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-10-15 13:01:26,660 WARN L179 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-15 13:01:26,958 WARN L179 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-15 13:01:27,265 WARN L179 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-15 13:01:27,564 WARN L179 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-15 13:01:27,881 WARN L179 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 13:01:28,195 WARN L179 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 13:01:28,517 WARN L179 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 13:01:28,832 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 13:01:29,130 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 13:01:29,455 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 13:01:29,779 WARN L179 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 13:01:30,117 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 13:01:30,461 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 13:01:30,792 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 13:01:31,116 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 13:01:31,452 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 13:01:31,773 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 13:01:32,111 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 13:01:32,429 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 13:01:32,762 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 13:01:33,098 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 13:01:33,442 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 13:01:33,764 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 13:01:34,101 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 13:01:34,438 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 13:01:34,768 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 13:01:35,083 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 13:01:35,456 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 13:01:35,768 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 13:01:36,089 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 13:01:47,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:01:47,028 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2018-10-15 13:01:47,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-15 13:01:47,028 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 181 [2018-10-15 13:01:47,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:01:47,029 INFO L225 Difference]: With dead ends: 186 [2018-10-15 13:01:47,029 INFO L226 Difference]: Without dead ends: 186 [2018-10-15 13:01:47,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3486 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=7479, Invalid=21591, Unknown=0, NotChecked=0, Total=29070 [2018-10-15 13:01:47,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-10-15 13:01:47,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2018-10-15 13:01:47,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-10-15 13:01:47,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 186 transitions. [2018-10-15 13:01:47,033 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 186 transitions. Word has length 181 [2018-10-15 13:01:47,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:01:47,034 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 186 transitions. [2018-10-15 13:01:47,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-15 13:01:47,034 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 186 transitions. [2018-10-15 13:01:47,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-10-15 13:01:47,035 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:01:47,035 INFO L375 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:01:47,035 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:01:47,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:01:47,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1600659978, now seen corresponding path program 43 times [2018-10-15 13:01:47,036 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:01:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:01:51,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:01:51,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:01:51,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2018-10-15 13:01:51,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-15 13:01:51,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-15 13:01:51,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2018-10-15 13:01:51,402 INFO L87 Difference]: Start difference. First operand 186 states and 186 transitions. Second operand 89 states. [2018-10-15 13:01:52,084 WARN L179 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 10 [2018-10-15 13:01:52,349 WARN L179 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 9 [2018-10-15 13:01:52,617 WARN L179 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-10-15 13:01:52,910 WARN L179 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-10-15 13:01:53,196 WARN L179 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-10-15 13:01:53,497 WARN L179 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-10-15 13:01:53,798 WARN L179 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-10-15 13:01:54,083 WARN L179 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-10-15 13:01:54,379 WARN L179 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-10-15 13:01:54,693 WARN L179 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-10-15 13:01:55,005 WARN L179 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-15 13:01:55,317 WARN L179 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-15 13:01:55,631 WARN L179 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-15 13:01:55,994 WARN L179 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-15 13:01:56,321 WARN L179 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 13:01:56,647 WARN L179 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 13:01:56,964 WARN L179 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 13:01:57,320 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 13:01:57,636 WARN L179 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 13:01:57,963 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 13:01:58,283 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 13:01:58,617 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 13:01:58,953 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 13:01:59,279 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 13:01:59,643 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 13:01:59,982 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 13:02:00,318 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 13:02:00,668 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 13:02:01,040 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 13:02:01,386 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 13:02:01,711 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 13:02:02,053 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 13:02:02,389 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 13:02:02,727 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 13:02:03,084 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 13:02:03,421 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 13:02:03,784 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 13:02:04,125 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 13:02:04,453 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 13:02:05,108 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-15 13:02:06,147 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-10-15 13:02:15,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:02:15,849 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2018-10-15 13:02:15,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-15 13:02:15,850 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 185 [2018-10-15 13:02:15,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:02:15,851 INFO L225 Difference]: With dead ends: 190 [2018-10-15 13:02:15,851 INFO L226 Difference]: Without dead ends: 190 [2018-10-15 13:02:15,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3655 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=7829, Invalid=22621, Unknown=0, NotChecked=0, Total=30450 [2018-10-15 13:02:15,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-10-15 13:02:15,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2018-10-15 13:02:15,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-10-15 13:02:15,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 190 transitions. [2018-10-15 13:02:15,855 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 190 transitions. Word has length 185 [2018-10-15 13:02:15,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:02:15,856 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 190 transitions. [2018-10-15 13:02:15,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-15 13:02:15,856 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 190 transitions. [2018-10-15 13:02:15,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-10-15 13:02:15,857 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:02:15,857 INFO L375 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:02:15,857 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:02:15,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:02:15,858 INFO L82 PathProgramCache]: Analyzing trace with hash 666911822, now seen corresponding path program 44 times [2018-10-15 13:02:15,858 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:02:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:02:20,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:02:20,114 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:02:20,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2018-10-15 13:02:20,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-15 13:02:20,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-15 13:02:20,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=8011, Unknown=0, NotChecked=0, Total=8190 [2018-10-15 13:02:20,115 INFO L87 Difference]: Start difference. First operand 190 states and 190 transitions. Second operand 91 states. [2018-10-15 13:02:20,772 WARN L179 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 10 [2018-10-15 13:02:21,046 WARN L179 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 9 [2018-10-15 13:02:21,343 WARN L179 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2018-10-15 13:02:21,679 WARN L179 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2018-10-15 13:02:21,967 WARN L179 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-10-15 13:02:22,259 WARN L179 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-10-15 13:02:22,609 WARN L179 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-10-15 13:02:22,920 WARN L179 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-10-15 13:02:23,231 WARN L179 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-10-15 13:02:23,544 WARN L179 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-10-15 13:02:23,859 WARN L179 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-10-15 13:02:24,175 WARN L179 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-10-15 13:02:24,505 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-15 13:02:24,840 WARN L179 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-15 13:02:25,167 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-15 13:02:25,501 WARN L179 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-15 13:02:25,839 WARN L179 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 13:02:26,184 WARN L179 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 13:02:26,558 WARN L179 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 13:02:26,918 WARN L179 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 13:02:27,255 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 13:02:27,636 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 13:02:27,974 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 13:02:28,307 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 13:02:28,660 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 13:02:29,014 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 13:02:29,365 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 13:02:29,729 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 13:02:30,078 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 13:02:30,437 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 13:02:30,789 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 13:02:31,159 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 13:02:31,534 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 13:02:31,905 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 13:02:32,278 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 13:02:32,637 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 13:02:32,984 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 13:02:33,335 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 13:02:33,684 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 13:02:34,048 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 13:02:34,405 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 13:02:34,748 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 13:02:46,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:02:46,004 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2018-10-15 13:02:46,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-15 13:02:46,005 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 189 [2018-10-15 13:02:46,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:02:46,006 INFO L225 Difference]: With dead ends: 194 [2018-10-15 13:02:46,006 INFO L226 Difference]: Without dead ends: 194 [2018-10-15 13:02:46,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3828 ImplicationChecksByTransitivity, 28.6s TimeCoverageRelationStatistics Valid=8187, Invalid=23675, Unknown=0, NotChecked=0, Total=31862 [2018-10-15 13:02:46,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-15 13:02:46,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2018-10-15 13:02:46,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-10-15 13:02:46,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 194 transitions. [2018-10-15 13:02:46,010 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 194 transitions. Word has length 189 [2018-10-15 13:02:46,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:02:46,010 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 194 transitions. [2018-10-15 13:02:46,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-15 13:02:46,010 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 194 transitions. [2018-10-15 13:02:46,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-10-15 13:02:46,011 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:02:46,012 INFO L375 BasicCegarLoop]: trace histogram [89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:02:46,012 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:02:46,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:02:46,012 INFO L82 PathProgramCache]: Analyzing trace with hash -420109166, now seen corresponding path program 45 times [2018-10-15 13:02:46,013 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:02:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:02:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:02:50,802 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:02:50,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2018-10-15 13:02:50,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-15 13:02:50,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-15 13:02:50,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=8373, Unknown=0, NotChecked=0, Total=8556 [2018-10-15 13:02:50,803 INFO L87 Difference]: Start difference. First operand 194 states and 194 transitions. Second operand 93 states. [2018-10-15 13:02:51,451 WARN L179 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 10 [2018-10-15 13:02:51,738 WARN L179 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 9 [2018-10-15 13:02:52,048 WARN L179 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2018-10-15 13:02:52,392 WARN L179 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2018-10-15 13:02:52,701 WARN L179 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2018-10-15 13:02:53,011 WARN L179 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2018-10-15 13:02:53,342 WARN L179 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-10-15 13:02:53,665 WARN L179 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-10-15 13:02:53,993 WARN L179 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-10-15 13:02:54,328 WARN L179 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-10-15 13:02:54,679 WARN L179 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-10-15 13:02:55,033 WARN L179 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-10-15 13:02:55,387 WARN L179 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-10-15 13:02:55,739 WARN L179 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-10-15 13:02:56,080 WARN L179 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-15 13:02:56,480 WARN L179 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-15 13:02:56,834 WARN L179 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-15 13:02:57,206 WARN L179 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-15 13:02:57,596 WARN L179 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 13:02:57,949 WARN L179 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 13:02:58,302 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 13:02:58,664 WARN L179 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 13:02:59,018 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 13:02:59,372 WARN L179 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 13:02:59,741 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 13:03:00,128 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 13:03:00,492 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 13:03:00,865 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 13:03:01,229 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 13:03:01,614 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 13:03:01,966 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 13:03:02,367 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 13:03:02,753 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 13:03:03,119 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 13:03:03,526 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 13:03:03,883 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 13:03:04,247 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 13:03:04,634 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 13:03:04,995 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 13:03:05,356 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 13:03:05,709 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 13:03:06,068 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 13:03:07,500 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-10-15 13:03:18,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:03:18,782 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2018-10-15 13:03:18,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-15 13:03:18,783 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 193 [2018-10-15 13:03:18,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:03:18,784 INFO L225 Difference]: With dead ends: 198 [2018-10-15 13:03:18,784 INFO L226 Difference]: Without dead ends: 198 [2018-10-15 13:03:18,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4005 ImplicationChecksByTransitivity, 31.1s TimeCoverageRelationStatistics Valid=8553, Invalid=24753, Unknown=0, NotChecked=0, Total=33306 [2018-10-15 13:03:18,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-10-15 13:03:18,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2018-10-15 13:03:18,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-10-15 13:03:18,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2018-10-15 13:03:18,787 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 193 [2018-10-15 13:03:18,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:03:18,787 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2018-10-15 13:03:18,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-15 13:03:18,787 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2018-10-15 13:03:18,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-15 13:03:18,788 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:03:18,788 INFO L375 BasicCegarLoop]: trace histogram [91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:03:18,788 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:03:18,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:03:18,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1345929942, now seen corresponding path program 46 times [2018-10-15 13:03:18,789 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:03:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:03:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:03:23,678 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:03:23,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2018-10-15 13:03:23,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-15 13:03:23,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-15 13:03:23,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=8743, Unknown=0, NotChecked=0, Total=8930 [2018-10-15 13:03:23,679 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand 95 states. [2018-10-15 13:03:24,349 WARN L179 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 10 [2018-10-15 13:03:24,636 WARN L179 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 9 [2018-10-15 13:03:24,936 WARN L179 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2018-10-15 13:03:25,266 WARN L179 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2018-10-15 13:03:25,571 WARN L179 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2018-10-15 13:03:25,890 WARN L179 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2018-10-15 13:03:26,224 WARN L179 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2018-10-15 13:03:26,572 WARN L179 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2018-10-15 13:03:26,901 WARN L179 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-10-15 13:03:27,258 WARN L179 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-10-15 13:03:27,597 WARN L179 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-10-15 13:03:27,971 WARN L179 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-10-15 13:03:28,331 WARN L179 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-10-15 13:03:28,680 WARN L179 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-10-15 13:03:29,038 WARN L179 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-10-15 13:03:29,394 WARN L179 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-10-15 13:03:29,751 WARN L179 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-15 13:03:30,123 WARN L179 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-15 13:03:30,484 WARN L179 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-15 13:03:30,844 WARN L179 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-15 13:03:31,213 WARN L179 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 13:03:31,581 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 13:03:31,947 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 13:03:32,312 WARN L179 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 13:03:32,685 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 13:03:33,100 WARN L179 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 13:03:33,500 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 13:03:33,882 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 13:03:34,261 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 13:03:34,655 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 13:03:35,026 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 13:03:35,403 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 13:03:35,791 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 13:03:36,166 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 13:03:36,556 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 13:03:36,931 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 13:03:37,314 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 13:03:37,698 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 13:03:38,098 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 13:03:38,517 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 13:03:38,926 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 13:03:39,304 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 13:03:39,685 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 13:03:40,049 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 13:03:40,411 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 13:03:40,769 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 13:03:52,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:03:52,638 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2018-10-15 13:03:52,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-15 13:03:52,638 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 197 [2018-10-15 13:03:52,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:03:52,640 INFO L225 Difference]: With dead ends: 202 [2018-10-15 13:03:52,640 INFO L226 Difference]: Without dead ends: 202 [2018-10-15 13:03:52,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4186 ImplicationChecksByTransitivity, 32.2s TimeCoverageRelationStatistics Valid=8927, Invalid=25855, Unknown=0, NotChecked=0, Total=34782 [2018-10-15 13:03:52,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-10-15 13:03:52,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2018-10-15 13:03:52,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-10-15 13:03:52,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 202 transitions. [2018-10-15 13:03:52,644 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 202 transitions. Word has length 197 [2018-10-15 13:03:52,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:03:52,644 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 202 transitions. [2018-10-15 13:03:52,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-15 13:03:52,644 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 202 transitions. [2018-10-15 13:03:52,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-10-15 13:03:52,645 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:03:52,645 INFO L375 BasicCegarLoop]: trace histogram [93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:03:52,645 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:03:52,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:03:52,646 INFO L82 PathProgramCache]: Analyzing trace with hash 373038874, now seen corresponding path program 47 times [2018-10-15 13:03:52,646 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:03:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:03:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:03:57,615 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:03:57,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2018-10-15 13:03:57,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-15 13:03:57,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-15 13:03:57,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=9121, Unknown=0, NotChecked=0, Total=9312 [2018-10-15 13:03:57,616 INFO L87 Difference]: Start difference. First operand 202 states and 202 transitions. Second operand 97 states. [2018-10-15 13:03:58,303 WARN L179 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 10 [2018-10-15 13:03:58,621 WARN L179 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 9 [2018-10-15 13:03:58,948 WARN L179 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2018-10-15 13:03:59,271 WARN L179 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2018-10-15 13:03:59,582 WARN L179 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2018-10-15 13:03:59,916 WARN L179 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2018-10-15 13:04:00,254 WARN L179 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2018-10-15 13:04:00,593 WARN L179 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2018-10-15 13:04:00,932 WARN L179 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2018-10-15 13:04:01,292 WARN L179 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2018-10-15 13:04:01,649 WARN L179 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-10-15 13:04:02,009 WARN L179 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-10-15 13:04:02,377 WARN L179 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-10-15 13:04:02,736 WARN L179 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-10-15 13:04:03,102 WARN L179 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-10-15 13:04:03,471 WARN L179 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-10-15 13:04:03,889 WARN L179 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-10-15 13:04:04,270 WARN L179 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-10-15 13:04:04,648 WARN L179 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-15 13:04:05,038 WARN L179 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-15 13:04:05,436 WARN L179 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-15 13:04:05,845 WARN L179 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-15 13:04:06,259 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 13:04:06,658 WARN L179 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 13:04:07,064 WARN L179 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 13:04:07,480 WARN L179 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 13:04:07,897 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 13:04:08,318 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 13:04:08,723 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 13:04:09,161 WARN L179 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 13:04:09,567 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 13:04:09,965 WARN L179 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 13:04:10,370 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 13:04:10,751 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 13:04:11,175 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 13:04:11,577 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 13:04:11,979 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 13:04:12,384 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 13:04:12,789 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 13:04:13,203 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 13:04:13,593 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 13:04:14,033 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 13:04:14,463 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 13:04:14,859 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 13:04:15,259 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 13:04:15,663 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 13:04:16,136 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 13:04:16,587 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 13:04:16,964 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-15 13:04:17,349 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11