java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBpl.xml -s ../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf -i ../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_false-valid-free.i_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b8f97f7-m [2018-10-10 15:17:09,607 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-10 15:17:09,614 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-10 15:17:09,631 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-10 15:17:09,632 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-10 15:17:09,633 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-10 15:17:09,634 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-10 15:17:09,636 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-10 15:17:09,637 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-10 15:17:09,638 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-10 15:17:09,639 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-10 15:17:09,664 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf [2018-10-10 15:17:09,681 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-10 15:17:09,682 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-10 15:17:09,683 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-10 15:17:09,683 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-10 15:17:09,683 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-10 15:17:09,683 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-10 15:17:09,684 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-10 15:17:09,684 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-10 15:17:09,685 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-10 15:17:09,685 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-10 15:17:09,685 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-10 15:17:09,685 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-10 15:17:09,686 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-10 15:17:09,686 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-10 15:17:09,687 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-10 15:17:09,732 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-10 15:17:09,745 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-10 15:17:09,748 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-10 15:17:09,750 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-10 15:17:09,751 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-10 15:17:09,751 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_false-valid-free.i_5.bpl [2018-10-10 15:17:09,752 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_false-valid-free.i_5.bpl' [2018-10-10 15:17:09,813 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-10 15:17:09,815 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-10-10 15:17:09,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-10 15:17:09,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-10 15:17:09,816 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-10 15:17:09,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:17:09" (1/1) ... [2018-10-10 15:17:09,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:17:09" (1/1) ... [2018-10-10 15:17:09,861 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:17:09" (1/1) ... [2018-10-10 15:17:09,862 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:17:09" (1/1) ... [2018-10-10 15:17:09,868 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:17:09" (1/1) ... [2018-10-10 15:17:09,877 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:17:09" (1/1) ... [2018-10-10 15:17:09,878 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:17:09" (1/1) ... [2018-10-10 15:17:09,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-10 15:17:09,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-10 15:17:09,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-10 15:17:09,887 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-10 15:17:09,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:17:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-10 15:17:09,962 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-10 15:17:09,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-10 15:17:09,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-10 15:17:10,448 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-10 15:17:10,449 INFO L202 PluginConnector]: Adding new model 960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 03:17:10 BoogieIcfgContainer [2018-10-10 15:17:10,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-10 15:17:10,451 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-10 15:17:10,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-10 15:17:10,454 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-10 15:17:10,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:17:09" (1/2) ... [2018-10-10 15:17:10,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39436850 and model type 960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 03:17:10, skipping insertion in model container [2018-10-10 15:17:10,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 03:17:10" (2/2) ... [2018-10-10 15:17:10,460 INFO L112 eAbstractionObserver]: Analyzing ICFG 960521-1_false-valid-free.i_5.bpl [2018-10-10 15:17:10,471 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-10-10 15:17:10,482 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-10 15:17:10,500 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-10 15:17:10,534 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-10 15:17:10,535 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-10 15:17:10,535 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-10 15:17:10,536 INFO L384 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-10-10 15:17:10,536 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-10 15:17:10,536 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-10 15:17:10,536 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-10 15:17:10,536 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-10 15:17:10,536 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-10 15:17:10,560 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2018-10-10 15:17:10,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-10 15:17:10,579 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:10,581 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:17:10,583 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:10,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:10,590 INFO L82 PathProgramCache]: Analyzing trace with hash -412527006, now seen corresponding path program 1 times [2018-10-10 15:17:10,638 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:10,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:17:11,802 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-10 15:17:11,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2018-10-10 15:17:11,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-10 15:17:11,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-10 15:17:11,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-10-10 15:17:11,828 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 14 states. [2018-10-10 15:17:12,426 WARN L178 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-10-10 15:17:13,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:17:13,323 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-10 15:17:13,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-10 15:17:13,326 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2018-10-10 15:17:13,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:17:13,340 INFO L225 Difference]: With dead ends: 74 [2018-10-10 15:17:13,340 INFO L226 Difference]: Without dead ends: 74 [2018-10-10 15:17:13,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2018-10-10 15:17:13,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-10 15:17:13,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2018-10-10 15:17:13,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-10 15:17:13,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-10 15:17:13,388 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 51 [2018-10-10 15:17:13,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:17:13,389 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-10 15:17:13,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-10 15:17:13,389 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-10 15:17:13,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-10 15:17:13,391 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:13,391 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:17:13,392 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:13,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:13,392 INFO L82 PathProgramCache]: Analyzing trace with hash 349139816, now seen corresponding path program 1 times [2018-10-10 15:17:13,394 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:14,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:17:14,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:17:14,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-10 15:17:14,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-10 15:17:14,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-10 15:17:14,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2018-10-10 15:17:14,018 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 17 states. [2018-10-10 15:17:14,721 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2018-10-10 15:17:15,679 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-10 15:17:15,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:17:15,850 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-10 15:17:15,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-10 15:17:15,854 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2018-10-10 15:17:15,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:17:15,856 INFO L225 Difference]: With dead ends: 86 [2018-10-10 15:17:15,857 INFO L226 Difference]: Without dead ends: 86 [2018-10-10 15:17:15,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=388, Invalid=1094, Unknown=0, NotChecked=0, Total=1482 [2018-10-10 15:17:15,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-10 15:17:15,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2018-10-10 15:17:15,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-10 15:17:15,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-10 15:17:15,869 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 63 [2018-10-10 15:17:15,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:17:15,869 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-10 15:17:15,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-10 15:17:15,870 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-10 15:17:15,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-10 15:17:15,871 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:15,871 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:17:15,872 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:15,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:15,872 INFO L82 PathProgramCache]: Analyzing trace with hash -939247762, now seen corresponding path program 2 times [2018-10-10 15:17:15,873 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:15,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:16,365 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:17:16,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:17:16,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-10 15:17:16,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-10 15:17:16,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-10 15:17:16,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2018-10-10 15:17:16,368 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 20 states. [2018-10-10 15:17:17,290 WARN L178 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2018-10-10 15:17:17,887 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-10 15:17:18,383 WARN L178 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2018-10-10 15:17:18,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:17:18,691 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-10 15:17:18,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-10 15:17:18,692 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2018-10-10 15:17:18,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:17:18,694 INFO L225 Difference]: With dead ends: 98 [2018-10-10 15:17:18,694 INFO L226 Difference]: Without dead ends: 98 [2018-10-10 15:17:18,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=471, Invalid=1509, Unknown=0, NotChecked=0, Total=1980 [2018-10-10 15:17:18,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-10 15:17:18,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2018-10-10 15:17:18,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-10 15:17:18,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-10 15:17:18,704 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 75 [2018-10-10 15:17:18,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:17:18,704 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-10 15:17:18,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-10 15:17:18,705 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-10 15:17:18,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-10 15:17:18,706 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:18,706 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:17:18,707 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:18,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:18,707 INFO L82 PathProgramCache]: Analyzing trace with hash 893723252, now seen corresponding path program 3 times [2018-10-10 15:17:18,708 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:17:19,354 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:17:19,354 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-10 15:17:19,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-10 15:17:19,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-10 15:17:19,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2018-10-10 15:17:19,356 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 22 states. [2018-10-10 15:17:21,271 WARN L178 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-10 15:17:22,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:17:22,103 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-10 15:17:22,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-10 15:17:22,104 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 87 [2018-10-10 15:17:22,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:17:22,106 INFO L225 Difference]: With dead ends: 110 [2018-10-10 15:17:22,106 INFO L226 Difference]: Without dead ends: 110 [2018-10-10 15:17:22,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=547, Invalid=1903, Unknown=0, NotChecked=0, Total=2450 [2018-10-10 15:17:22,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-10 15:17:22,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2018-10-10 15:17:22,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-10 15:17:22,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-10 15:17:22,116 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 87 [2018-10-10 15:17:22,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:17:22,117 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-10 15:17:22,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-10 15:17:22,117 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-10 15:17:22,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-10 15:17:22,119 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:22,119 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:17:22,119 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:22,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:22,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1601194886, now seen corresponding path program 4 times [2018-10-10 15:17:22,121 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:22,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:23,077 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:17:23,078 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:17:23,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-10 15:17:23,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-10 15:17:23,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-10 15:17:23,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2018-10-10 15:17:23,079 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 24 states. [2018-10-10 15:17:25,860 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2018-10-10 15:17:25,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:17:25,962 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-10-10 15:17:25,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-10 15:17:25,965 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 99 [2018-10-10 15:17:25,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:17:25,967 INFO L225 Difference]: With dead ends: 122 [2018-10-10 15:17:25,967 INFO L226 Difference]: Without dead ends: 122 [2018-10-10 15:17:25,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=623, Invalid=2347, Unknown=0, NotChecked=0, Total=2970 [2018-10-10 15:17:25,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-10 15:17:25,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 112. [2018-10-10 15:17:25,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-10 15:17:25,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-10 15:17:25,976 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 99 [2018-10-10 15:17:25,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:17:25,977 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-10 15:17:25,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-10 15:17:25,977 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-10 15:17:25,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-10 15:17:25,979 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:25,979 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:17:25,979 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:25,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:25,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1113494144, now seen corresponding path program 5 times [2018-10-10 15:17:25,981 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:25,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:26,717 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:17:26,718 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:17:26,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-10 15:17:26,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-10 15:17:26,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-10 15:17:26,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2018-10-10 15:17:26,719 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 28 states. [2018-10-10 15:17:28,091 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2018-10-10 15:17:28,558 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-10 15:17:28,710 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:17:29,216 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:17:30,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:17:30,390 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-10-10 15:17:30,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-10 15:17:30,391 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 111 [2018-10-10 15:17:30,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:17:30,393 INFO L225 Difference]: With dead ends: 134 [2018-10-10 15:17:30,393 INFO L226 Difference]: Without dead ends: 134 [2018-10-10 15:17:30,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1004, Invalid=3156, Unknown=0, NotChecked=0, Total=4160 [2018-10-10 15:17:30,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-10 15:17:30,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 124. [2018-10-10 15:17:30,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-10 15:17:30,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-10-10 15:17:30,402 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 111 [2018-10-10 15:17:30,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:17:30,402 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-10-10 15:17:30,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-10 15:17:30,403 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-10-10 15:17:30,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-10 15:17:30,405 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:30,405 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:17:30,405 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:30,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:30,406 INFO L82 PathProgramCache]: Analyzing trace with hash 267898246, now seen corresponding path program 6 times [2018-10-10 15:17:30,406 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:30,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:31,472 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:17:31,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:17:31,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-10-10 15:17:31,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-10 15:17:31,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-10 15:17:31,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2018-10-10 15:17:31,474 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 30 states. [2018-10-10 15:17:33,205 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2018-10-10 15:17:33,778 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-10 15:17:33,936 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:17:34,402 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:17:34,553 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-10 15:17:35,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:17:35,605 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-10-10 15:17:35,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-10 15:17:35,606 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 123 [2018-10-10 15:17:35,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:17:35,607 INFO L225 Difference]: With dead ends: 146 [2018-10-10 15:17:35,607 INFO L226 Difference]: Without dead ends: 146 [2018-10-10 15:17:35,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1064, Invalid=3628, Unknown=0, NotChecked=0, Total=4692 [2018-10-10 15:17:35,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-10 15:17:35,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 136. [2018-10-10 15:17:35,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-10 15:17:35,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-10-10 15:17:35,617 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 123 [2018-10-10 15:17:35,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:17:35,617 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-10-10 15:17:35,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-10 15:17:35,617 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-10-10 15:17:35,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-10 15:17:35,620 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:35,620 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:17:35,620 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:35,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:35,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1255167116, now seen corresponding path program 7 times [2018-10-10 15:17:35,625 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:37,433 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:17:37,434 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:17:37,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-10 15:17:37,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-10 15:17:37,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-10 15:17:37,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2018-10-10 15:17:37,435 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 32 states. [2018-10-10 15:17:38,146 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-10 15:17:43,045 WARN L178 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2018-10-10 15:17:43,365 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2018-10-10 15:17:43,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:17:43,748 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-10-10 15:17:43,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-10 15:17:43,748 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 135 [2018-10-10 15:17:43,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:17:43,750 INFO L225 Difference]: With dead ends: 158 [2018-10-10 15:17:43,750 INFO L226 Difference]: Without dead ends: 158 [2018-10-10 15:17:43,752 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1413, Invalid=4439, Unknown=0, NotChecked=0, Total=5852 [2018-10-10 15:17:43,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-10 15:17:43,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2018-10-10 15:17:43,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-10 15:17:43,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-10 15:17:43,758 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 135 [2018-10-10 15:17:43,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:17:43,759 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-10 15:17:43,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-10 15:17:43,759 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-10 15:17:43,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-10 15:17:43,761 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:43,761 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:17:43,761 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:43,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:43,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1322745198, now seen corresponding path program 8 times [2018-10-10 15:17:43,764 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:17:44,799 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:17:44,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-10 15:17:44,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-10 15:17:44,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-10 15:17:44,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2018-10-10 15:17:44,800 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 32 states. [2018-10-10 15:17:49,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:17:49,958 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2018-10-10 15:17:49,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-10 15:17:49,958 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 147 [2018-10-10 15:17:49,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:17:49,960 INFO L225 Difference]: With dead ends: 170 [2018-10-10 15:17:49,960 INFO L226 Difference]: Without dead ends: 170 [2018-10-10 15:17:49,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=927, Invalid=4623, Unknown=0, NotChecked=0, Total=5550 [2018-10-10 15:17:49,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-10 15:17:49,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2018-10-10 15:17:49,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-10 15:17:49,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-10-10 15:17:49,966 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 147 [2018-10-10 15:17:49,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:17:49,967 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-10-10 15:17:49,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-10 15:17:49,967 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-10-10 15:17:49,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-10 15:17:49,969 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:49,969 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:17:49,970 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:49,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:49,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1975375768, now seen corresponding path program 9 times [2018-10-10 15:17:49,971 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:50,817 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:17:50,817 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:17:50,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-10-10 15:17:50,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-10 15:17:50,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-10 15:17:50,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2018-10-10 15:17:50,819 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 36 states. [2018-10-10 15:17:53,686 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:17:56,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:17:56,800 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2018-10-10 15:17:56,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-10 15:17:56,801 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 159 [2018-10-10 15:17:56,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:17:56,802 INFO L225 Difference]: With dead ends: 182 [2018-10-10 15:17:56,802 INFO L226 Difference]: Without dead ends: 182 [2018-10-10 15:17:56,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1890, Invalid=5942, Unknown=0, NotChecked=0, Total=7832 [2018-10-10 15:17:56,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-10 15:17:56,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 172. [2018-10-10 15:17:56,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-10-10 15:17:56,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2018-10-10 15:17:56,808 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 159 [2018-10-10 15:17:56,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:17:56,809 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2018-10-10 15:17:56,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-10 15:17:56,809 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2018-10-10 15:17:56,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-10 15:17:56,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:56,810 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:17:56,810 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:56,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:56,811 INFO L82 PathProgramCache]: Analyzing trace with hash 453890974, now seen corresponding path program 10 times [2018-10-10 15:17:56,812 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:57,719 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:17:57,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:17:57,719 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-10 15:17:57,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-10 15:17:57,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-10 15:17:57,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2018-10-10 15:17:57,721 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 38 states. [2018-10-10 15:18:00,231 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-10 15:18:00,781 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:18:01,294 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:18:01,463 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:18:01,899 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:18:02,149 WARN L178 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:18:02,556 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:18:03,115 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:18:03,280 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-10 15:18:03,776 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-10 15:18:03,997 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2018-10-10 15:18:04,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:18:04,684 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2018-10-10 15:18:04,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-10 15:18:04,685 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 171 [2018-10-10 15:18:04,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:18:04,687 INFO L225 Difference]: With dead ends: 194 [2018-10-10 15:18:04,687 INFO L226 Difference]: Without dead ends: 194 [2018-10-10 15:18:04,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1966, Invalid=6590, Unknown=0, NotChecked=0, Total=8556 [2018-10-10 15:18:04,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-10 15:18:04,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 184. [2018-10-10 15:18:04,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-10 15:18:04,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2018-10-10 15:18:04,694 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 171 [2018-10-10 15:18:04,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:18:04,694 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2018-10-10 15:18:04,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-10 15:18:04,695 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2018-10-10 15:18:04,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-10 15:18:04,696 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:18:04,696 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:18:04,696 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:18:04,696 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:18:04,697 INFO L82 PathProgramCache]: Analyzing trace with hash -749341020, now seen corresponding path program 11 times [2018-10-10 15:18:04,697 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:18:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:18:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:18:05,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:18:05,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-10 15:18:05,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-10 15:18:05,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-10 15:18:05,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1349, Unknown=0, NotChecked=0, Total=1560 [2018-10-10 15:18:05,890 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand 40 states. [2018-10-10 15:18:09,023 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:18:13,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:18:13,214 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2018-10-10 15:18:13,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-10 15:18:13,215 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 183 [2018-10-10 15:18:13,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:18:13,216 INFO L225 Difference]: With dead ends: 206 [2018-10-10 15:18:13,217 INFO L226 Difference]: Without dead ends: 206 [2018-10-10 15:18:13,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2435, Invalid=7665, Unknown=0, NotChecked=0, Total=10100 [2018-10-10 15:18:13,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-10-10 15:18:13,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 196. [2018-10-10 15:18:13,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-10 15:18:13,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2018-10-10 15:18:13,225 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 183 [2018-10-10 15:18:13,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:18:13,225 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2018-10-10 15:18:13,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-10 15:18:13,226 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2018-10-10 15:18:13,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-10-10 15:18:13,227 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:18:13,227 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:18:13,227 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:18:13,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:18:13,228 INFO L82 PathProgramCache]: Analyzing trace with hash -527187798, now seen corresponding path program 12 times [2018-10-10 15:18:13,228 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:18:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:18:14,575 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:18:14,575 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:18:14,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-10-10 15:18:14,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-10 15:18:14,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-10 15:18:14,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2018-10-10 15:18:14,577 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 42 states. [2018-10-10 15:18:17,727 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-10 15:18:18,384 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-10 15:18:18,553 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:18:19,061 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:18:19,294 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:18:19,739 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:18:19,910 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:18:20,365 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:18:20,554 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-10 15:18:21,027 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-10 15:18:21,208 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-10 15:18:21,529 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-10 15:18:22,021 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2018-10-10 15:18:22,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:18:22,895 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2018-10-10 15:18:22,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-10 15:18:22,896 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 195 [2018-10-10 15:18:22,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:18:22,897 INFO L225 Difference]: With dead ends: 218 [2018-10-10 15:18:22,898 INFO L226 Difference]: Without dead ends: 218 [2018-10-10 15:18:22,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2105 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=2185, Invalid=8321, Unknown=0, NotChecked=0, Total=10506 [2018-10-10 15:18:22,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-10-10 15:18:22,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 208. [2018-10-10 15:18:22,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-10 15:18:22,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2018-10-10 15:18:22,903 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 195 [2018-10-10 15:18:22,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:18:22,904 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2018-10-10 15:18:22,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-10 15:18:22,904 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2018-10-10 15:18:22,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-10 15:18:22,905 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:18:22,905 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:18:22,906 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:18:22,906 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:18:22,906 INFO L82 PathProgramCache]: Analyzing trace with hash -192630352, now seen corresponding path program 13 times [2018-10-10 15:18:22,907 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:18:22,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:18:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:18:24,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:18:24,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-10 15:18:24,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-10 15:18:24,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-10 15:18:24,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1625, Unknown=0, NotChecked=0, Total=1892 [2018-10-10 15:18:24,057 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 44 states. [2018-10-10 15:18:29,416 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:18:32,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:18:32,827 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2018-10-10 15:18:32,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-10 15:18:32,828 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 207 [2018-10-10 15:18:32,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:18:32,829 INFO L225 Difference]: With dead ends: 230 [2018-10-10 15:18:32,829 INFO L226 Difference]: Without dead ends: 230 [2018-10-10 15:18:32,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2716 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=3048, Invalid=9608, Unknown=0, NotChecked=0, Total=12656 [2018-10-10 15:18:32,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-10-10 15:18:32,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 220. [2018-10-10 15:18:32,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-10 15:18:32,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 220 transitions. [2018-10-10 15:18:32,835 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 220 transitions. Word has length 207 [2018-10-10 15:18:32,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:18:32,836 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 220 transitions. [2018-10-10 15:18:32,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-10 15:18:32,836 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 220 transitions. [2018-10-10 15:18:32,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-10 15:18:32,837 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:18:32,838 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:18:32,838 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:18:32,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:18:32,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1868150346, now seen corresponding path program 14 times [2018-10-10 15:18:32,839 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:18:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:18:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:18:34,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:18:34,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-10 15:18:34,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-10 15:18:34,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-10 15:18:34,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1799, Unknown=0, NotChecked=0, Total=2070 [2018-10-10 15:18:34,064 INFO L87 Difference]: Start difference. First operand 220 states and 220 transitions. Second operand 46 states. [2018-10-10 15:18:37,324 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:18:38,936 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:18:39,529 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:18:39,750 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:18:40,179 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:18:40,352 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:18:40,818 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:18:41,001 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:18:41,487 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:18:42,150 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:18:43,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:18:43,762 INFO L93 Difference]: Finished difference Result 242 states and 242 transitions. [2018-10-10 15:18:43,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-10 15:18:43,762 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 219 [2018-10-10 15:18:43,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:18:43,764 INFO L225 Difference]: With dead ends: 242 [2018-10-10 15:18:43,764 INFO L226 Difference]: Without dead ends: 242 [2018-10-10 15:18:43,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2906 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=3140, Invalid=10432, Unknown=0, NotChecked=0, Total=13572 [2018-10-10 15:18:43,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-10-10 15:18:43,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 232. [2018-10-10 15:18:43,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-10-10 15:18:43,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2018-10-10 15:18:43,770 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 219 [2018-10-10 15:18:43,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:18:43,770 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2018-10-10 15:18:43,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-10 15:18:43,771 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2018-10-10 15:18:43,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-10-10 15:18:43,772 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:18:43,772 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:18:43,772 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:18:43,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:18:43,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1714817212, now seen corresponding path program 15 times [2018-10-10 15:18:43,774 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:18:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:18:45,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:18:45,508 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:18:45,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-10 15:18:45,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-10 15:18:45,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-10 15:18:45,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1925, Unknown=0, NotChecked=0, Total=2256 [2018-10-10 15:18:45,510 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand 48 states. [2018-10-10 15:18:49,906 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:18:55,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:18:55,268 INFO L93 Difference]: Finished difference Result 254 states and 254 transitions. [2018-10-10 15:18:55,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-10 15:18:55,268 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 231 [2018-10-10 15:18:55,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:18:55,270 INFO L225 Difference]: With dead ends: 254 [2018-10-10 15:18:55,270 INFO L226 Difference]: Without dead ends: 254 [2018-10-10 15:18:55,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3423 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=3729, Invalid=11771, Unknown=0, NotChecked=0, Total=15500 [2018-10-10 15:18:55,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-10-10 15:18:55,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 244. [2018-10-10 15:18:55,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-10-10 15:18:55,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 244 transitions. [2018-10-10 15:18:55,276 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 244 transitions. Word has length 231 [2018-10-10 15:18:55,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:18:55,277 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 244 transitions. [2018-10-10 15:18:55,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-10 15:18:55,277 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 244 transitions. [2018-10-10 15:18:55,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-10 15:18:55,278 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:18:55,279 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:18:55,279 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:18:55,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:18:55,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1238274366, now seen corresponding path program 16 times [2018-10-10 15:18:55,280 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:18:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:18:56,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:18:56,946 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:18:56,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-10 15:18:56,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-10 15:18:56,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-10 15:18:56,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2122, Unknown=0, NotChecked=0, Total=2256 [2018-10-10 15:18:56,947 INFO L87 Difference]: Start difference. First operand 244 states and 244 transitions. Second operand 48 states. [2018-10-10 15:19:07,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:19:07,822 INFO L93 Difference]: Finished difference Result 266 states and 266 transitions. [2018-10-10 15:19:07,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-10 15:19:07,823 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 243 [2018-10-10 15:19:07,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:19:07,825 INFO L225 Difference]: With dead ends: 266 [2018-10-10 15:19:07,825 INFO L226 Difference]: Without dead ends: 266 [2018-10-10 15:19:07,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2323 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1535, Invalid=11575, Unknown=0, NotChecked=0, Total=13110 [2018-10-10 15:19:07,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-10-10 15:19:07,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 256. [2018-10-10 15:19:07,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-10-10 15:19:07,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 256 transitions. [2018-10-10 15:19:07,831 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 256 transitions. Word has length 243 [2018-10-10 15:19:07,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:19:07,831 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 256 transitions. [2018-10-10 15:19:07,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-10 15:19:07,832 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 256 transitions. [2018-10-10 15:19:07,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-10-10 15:19:07,833 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:19:07,833 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:19:07,833 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:19:07,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:19:07,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1319765048, now seen corresponding path program 17 times [2018-10-10 15:19:07,835 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:19:07,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:19:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:19:11,141 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:19:11,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-10-10 15:19:11,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-10 15:19:11,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-10 15:19:11,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=2249, Unknown=0, NotChecked=0, Total=2652 [2018-10-10 15:19:11,142 INFO L87 Difference]: Start difference. First operand 256 states and 256 transitions. Second operand 52 states. [2018-10-10 15:19:15,352 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-10 15:19:15,697 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:19:20,449 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:19:21,635 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:19:24,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:19:24,180 INFO L93 Difference]: Finished difference Result 278 states and 278 transitions. [2018-10-10 15:19:24,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-10 15:19:24,180 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 255 [2018-10-10 15:19:24,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:19:24,182 INFO L225 Difference]: With dead ends: 278 [2018-10-10 15:19:24,182 INFO L226 Difference]: Without dead ends: 278 [2018-10-10 15:19:24,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4214 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=4478, Invalid=14154, Unknown=0, NotChecked=0, Total=18632 [2018-10-10 15:19:24,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-10-10 15:19:24,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 268. [2018-10-10 15:19:24,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-10-10 15:19:24,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 268 transitions. [2018-10-10 15:19:24,188 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 268 transitions. Word has length 255 [2018-10-10 15:19:24,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:19:24,189 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 268 transitions. [2018-10-10 15:19:24,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-10 15:19:24,189 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 268 transitions. [2018-10-10 15:19:24,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-10-10 15:19:24,190 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:19:24,190 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:19:24,191 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:19:24,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:19:24,191 INFO L82 PathProgramCache]: Analyzing trace with hash -668913714, now seen corresponding path program 18 times [2018-10-10 15:19:24,192 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:19:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:19:25,303 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-10 15:19:27,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:19:27,034 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:19:27,034 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-10-10 15:19:27,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-10 15:19:27,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-10 15:19:27,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2455, Unknown=0, NotChecked=0, Total=2862 [2018-10-10 15:19:27,035 INFO L87 Difference]: Start difference. First operand 268 states and 268 transitions. Second operand 54 states. [2018-10-10 15:19:30,684 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-10 15:19:31,053 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:19:32,895 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:19:33,340 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:19:33,515 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:19:33,979 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:19:34,632 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:19:35,316 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:19:35,504 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:19:35,850 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-10 15:19:36,082 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:19:40,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:19:40,034 INFO L93 Difference]: Finished difference Result 290 states and 290 transitions. [2018-10-10 15:19:40,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-10 15:19:40,034 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 267 [2018-10-10 15:19:40,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:19:40,036 INFO L225 Difference]: With dead ends: 290 [2018-10-10 15:19:40,036 INFO L226 Difference]: Without dead ends: 290 [2018-10-10 15:19:40,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4448 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=4586, Invalid=15154, Unknown=0, NotChecked=0, Total=19740 [2018-10-10 15:19:40,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-10-10 15:19:40,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 280. [2018-10-10 15:19:40,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-10-10 15:19:40,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 280 transitions. [2018-10-10 15:19:40,043 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 280 transitions. Word has length 267 [2018-10-10 15:19:40,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:19:40,043 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 280 transitions. [2018-10-10 15:19:40,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-10 15:19:40,043 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 280 transitions. [2018-10-10 15:19:40,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-10-10 15:19:40,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:19:40,045 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:19:40,045 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:19:40,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:19:40,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1523616468, now seen corresponding path program 19 times [2018-10-10 15:19:40,047 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:19:40,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:19:42,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:19:42,027 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:19:42,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-10-10 15:19:42,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-10 15:19:42,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-10 15:19:42,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=2597, Unknown=0, NotChecked=0, Total=3080 [2018-10-10 15:19:42,029 INFO L87 Difference]: Start difference. First operand 280 states and 280 transitions. Second operand 56 states. [2018-10-10 15:19:46,125 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:19:46,292 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-10 15:19:48,201 WARN L178 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-10 15:19:51,338 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-10 15:19:53,622 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:19:56,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:19:56,503 INFO L93 Difference]: Finished difference Result 302 states and 302 transitions. [2018-10-10 15:19:56,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-10 15:19:56,503 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 279 [2018-10-10 15:19:56,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:19:56,505 INFO L225 Difference]: With dead ends: 302 [2018-10-10 15:19:56,505 INFO L226 Difference]: Without dead ends: 302 [2018-10-10 15:19:56,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5089 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=5295, Invalid=16757, Unknown=0, NotChecked=0, Total=22052 [2018-10-10 15:19:56,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2018-10-10 15:19:56,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 292. [2018-10-10 15:19:56,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-10-10 15:19:56,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 292 transitions. [2018-10-10 15:19:56,514 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 292 transitions. Word has length 279 [2018-10-10 15:19:56,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:19:56,514 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 292 transitions. [2018-10-10 15:19:56,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-10 15:19:56,514 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 292 transitions. [2018-10-10 15:19:56,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-10-10 15:19:56,516 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:19:56,516 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:19:56,516 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:19:56,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:19:56,517 INFO L82 PathProgramCache]: Analyzing trace with hash 2036436186, now seen corresponding path program 20 times [2018-10-10 15:19:56,517 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:19:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:19:58,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:19:58,360 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:19:58,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-10-10 15:19:58,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-10 15:19:58,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-10 15:19:58,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=2891, Unknown=0, NotChecked=0, Total=3306 [2018-10-10 15:19:58,361 INFO L87 Difference]: Start difference. First operand 292 states and 292 transitions. Second operand 58 states. [2018-10-10 15:20:01,614 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2018-10-10 15:20:01,780 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2018-10-10 15:20:03,043 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-10 15:20:03,216 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:03,727 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:03,902 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:04,370 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:04,548 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:05,029 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:05,216 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:05,703 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:05,894 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:06,393 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:06,625 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:06,837 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-10 15:20:07,205 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:07,408 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:07,937 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:08,146 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:08,679 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:08,893 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:09,441 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:09,659 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:10,237 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:10,463 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:11,062 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:11,300 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-10 15:20:11,683 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2018-10-10 15:20:11,931 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-10 15:20:12,174 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-10 15:20:12,593 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-10 15:20:12,804 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-10 15:20:14,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:20:14,323 INFO L93 Difference]: Finished difference Result 314 states and 314 transitions. [2018-10-10 15:20:14,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-10 15:20:14,324 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 291 [2018-10-10 15:20:14,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:20:14,326 INFO L225 Difference]: With dead ends: 314 [2018-10-10 15:20:14,326 INFO L226 Difference]: Without dead ends: 314 [2018-10-10 15:20:14,327 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5093 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=4885, Invalid=17765, Unknown=0, NotChecked=0, Total=22650 [2018-10-10 15:20:14,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2018-10-10 15:20:14,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 304. [2018-10-10 15:20:14,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-10-10 15:20:14,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 304 transitions. [2018-10-10 15:20:14,333 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 304 transitions. Word has length 291 [2018-10-10 15:20:14,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:20:14,333 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 304 transitions. [2018-10-10 15:20:14,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-10 15:20:14,333 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 304 transitions. [2018-10-10 15:20:14,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-10-10 15:20:14,335 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:20:14,335 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:20:14,335 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:20:14,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:20:14,336 INFO L82 PathProgramCache]: Analyzing trace with hash -476989984, now seen corresponding path program 21 times [2018-10-10 15:20:14,336 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:20:14,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:20:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:20:17,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:20:17,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-10-10 15:20:17,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-10 15:20:17,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-10 15:20:17,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=2969, Unknown=0, NotChecked=0, Total=3540 [2018-10-10 15:20:17,874 INFO L87 Difference]: Start difference. First operand 304 states and 304 transitions. Second operand 60 states. [2018-10-10 15:20:19,916 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-10 15:20:22,009 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:20:22,197 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:20:27,143 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:20:32,108 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2018-10-10 15:20:32,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:20:32,793 INFO L93 Difference]: Finished difference Result 326 states and 326 transitions. [2018-10-10 15:20:32,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-10 15:20:32,796 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 303 [2018-10-10 15:20:32,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:20:32,797 INFO L225 Difference]: With dead ends: 326 [2018-10-10 15:20:32,797 INFO L226 Difference]: Without dead ends: 326 [2018-10-10 15:20:32,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6048 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=6180, Invalid=19580, Unknown=0, NotChecked=0, Total=25760 [2018-10-10 15:20:32,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2018-10-10 15:20:32,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 316. [2018-10-10 15:20:32,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-10-10 15:20:32,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 316 transitions. [2018-10-10 15:20:32,803 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 316 transitions. Word has length 303 [2018-10-10 15:20:32,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:20:32,803 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 316 transitions. [2018-10-10 15:20:32,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-10 15:20:32,804 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 316 transitions. [2018-10-10 15:20:32,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-10-10 15:20:32,805 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:20:32,805 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:20:32,806 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:20:32,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:20:32,806 INFO L82 PathProgramCache]: Analyzing trace with hash 417236454, now seen corresponding path program 22 times [2018-10-10 15:20:32,807 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:20:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:20:34,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:20:34,991 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:20:34,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-10-10 15:20:34,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-10 15:20:34,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-10 15:20:34,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=3207, Unknown=0, NotChecked=0, Total=3782 [2018-10-10 15:20:34,992 INFO L87 Difference]: Start difference. First operand 316 states and 316 transitions. Second operand 62 states. [2018-10-10 15:20:38,423 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:38,965 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:39,529 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:40,106 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:40,689 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:40,863 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:20:41,326 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:41,499 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:20:41,987 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:42,172 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:20:42,354 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-10 15:20:42,558 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-10 15:20:42,752 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:42,944 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:20:43,439 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:43,624 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:20:44,121 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:44,828 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:45,032 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:20:45,556 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:45,764 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:20:46,311 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:46,528 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:20:47,087 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:47,306 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:20:47,961 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:48,189 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:20:48,769 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:49,011 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:20:49,604 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:49,843 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-10 15:20:50,453 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-10 15:20:51,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:20:51,728 INFO L93 Difference]: Finished difference Result 338 states and 338 transitions. [2018-10-10 15:20:51,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-10 15:20:51,728 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 315 [2018-10-10 15:20:51,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:20:51,730 INFO L225 Difference]: With dead ends: 338 [2018-10-10 15:20:51,730 INFO L226 Difference]: Without dead ends: 338 [2018-10-10 15:20:51,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6326 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=6304, Invalid=20756, Unknown=0, NotChecked=0, Total=27060 [2018-10-10 15:20:51,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-10-10 15:20:51,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 328. [2018-10-10 15:20:51,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-10-10 15:20:51,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 328 transitions. [2018-10-10 15:20:51,736 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 328 transitions. Word has length 315 [2018-10-10 15:20:51,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:20:51,736 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 328 transitions. [2018-10-10 15:20:51,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-10 15:20:51,737 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 328 transitions. [2018-10-10 15:20:51,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-10-10 15:20:51,738 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:20:51,738 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:20:51,739 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:20:51,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:20:51,739 INFO L82 PathProgramCache]: Analyzing trace with hash -930775828, now seen corresponding path program 23 times [2018-10-10 15:20:51,740 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:20:51,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:20:52,313 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-10 15:20:54,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:20:54,886 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:20:54,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-10-10 15:20:54,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-10 15:20:54,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-10 15:20:54,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=667, Invalid=3365, Unknown=0, NotChecked=0, Total=4032 [2018-10-10 15:20:54,887 INFO L87 Difference]: Start difference. First operand 328 states and 328 transitions. Second operand 64 states. [2018-10-10 15:20:57,813 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:21:00,547 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:21:02,988 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:21:08,041 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:21:12,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:21:12,427 INFO L93 Difference]: Finished difference Result 350 states and 350 transitions. [2018-10-10 15:21:12,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-10-10 15:21:12,428 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 327 [2018-10-10 15:21:12,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:21:12,429 INFO L225 Difference]: With dead ends: 350 [2018-10-10 15:21:12,429 INFO L226 Difference]: Without dead ends: 350 [2018-10-10 15:21:12,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7091 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=7133, Invalid=22623, Unknown=0, NotChecked=0, Total=29756 [2018-10-10 15:21:12,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2018-10-10 15:21:12,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 340. [2018-10-10 15:21:12,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-10-10 15:21:12,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 340 transitions. [2018-10-10 15:21:12,436 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 340 transitions. Word has length 327 [2018-10-10 15:21:12,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:21:12,436 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 340 transitions. [2018-10-10 15:21:12,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-10 15:21:12,437 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 340 transitions. [2018-10-10 15:21:12,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-10-10 15:21:12,438 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:21:12,439 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:21:12,439 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:21:12,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:21:12,439 INFO L82 PathProgramCache]: Analyzing trace with hash 830741234, now seen corresponding path program 24 times [2018-10-10 15:21:12,440 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:21:12,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:21:13,177 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-10 15:21:13,408 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-10 15:21:15,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:21:15,481 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:21:15,481 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-10-10 15:21:15,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-10 15:21:15,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-10 15:21:15,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=3859, Unknown=0, NotChecked=0, Total=4290 [2018-10-10 15:21:15,482 INFO L87 Difference]: Start difference. First operand 340 states and 340 transitions. Second operand 66 states. [2018-10-10 15:21:18,432 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2018-10-10 15:21:19,853 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2018-10-10 15:21:20,024 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 49 [2018-10-10 15:21:20,603 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 49 [2018-10-10 15:21:20,790 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 49 [2018-10-10 15:21:21,385 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 49 [2018-10-10 15:21:21,585 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 49 [2018-10-10 15:21:22,220 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 49 [2018-10-10 15:21:22,447 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 49 [2018-10-10 15:21:22,812 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 49 [2018-10-10 15:21:23,154 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 56 [2018-10-10 15:21:23,474 WARN L178 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 15:21:23,678 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 15:21:23,900 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 15:21:24,154 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 15:21:24,401 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 15:21:24,578 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 15:21:24,781 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 15:21:25,046 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 15:21:25,308 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 15:21:25,492 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 15:21:25,687 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 15:21:25,953 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 15:21:26,221 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 15:21:26,422 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 15:21:26,623 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 15:21:26,897 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 15:21:27,183 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 15:21:27,378 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 15:21:27,582 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 15:21:27,858 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 15:21:28,147 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 15:21:28,340 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 15:21:28,605 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 15:21:28,916 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 15:21:29,213 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 15:21:29,407 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 15:21:29,607 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 15:21:29,889 WARN L178 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 15:21:30,172 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 58 [2018-10-10 15:21:30,367 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2018-10-10 15:21:30,568 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2018-10-10 15:21:30,838 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 57 [2018-10-10 15:21:31,127 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 58 [2018-10-10 15:21:31,336 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2018-10-10 15:21:31,640 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 57 [2018-10-10 15:21:31,936 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 58 [2018-10-10 15:21:32,422 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 57 [2018-10-10 15:21:32,689 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2018-10-10 15:21:33,161 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2018-10-10 15:21:33,414 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2018-10-10 15:21:33,630 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2018-10-10 15:21:33,933 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2018-10-10 15:21:34,177 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2018-10-10 15:21:34,623 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2018-10-10 15:21:34,855 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2018-10-10 15:21:36,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:21:36,466 INFO L93 Difference]: Finished difference Result 362 states and 362 transitions. [2018-10-10 15:21:36,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-10 15:21:36,467 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 339 [2018-10-10 15:21:36,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:21:36,469 INFO L225 Difference]: With dead ends: 362 [2018-10-10 15:21:36,469 INFO L226 Difference]: Without dead ends: 362 [2018-10-10 15:21:36,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6491 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=5471, Invalid=23599, Unknown=0, NotChecked=0, Total=29070 [2018-10-10 15:21:36,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2018-10-10 15:21:36,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 352. [2018-10-10 15:21:36,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-10-10 15:21:36,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 352 transitions. [2018-10-10 15:21:36,474 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 352 transitions. Word has length 339 [2018-10-10 15:21:36,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:21:36,475 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 352 transitions. [2018-10-10 15:21:36,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-10 15:21:36,475 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 352 transitions. [2018-10-10 15:21:36,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-10-10 15:21:36,477 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:21:36,477 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:21:36,477 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:21:36,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:21:36,478 INFO L82 PathProgramCache]: Analyzing trace with hash -2103975944, now seen corresponding path program 25 times [2018-10-10 15:21:36,478 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:21:36,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:21:40,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:21:40,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:21:40,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-10-10 15:21:40,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-10 15:21:40,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-10 15:21:40,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=771, Invalid=3785, Unknown=0, NotChecked=0, Total=4556 [2018-10-10 15:21:40,547 INFO L87 Difference]: Start difference. First operand 352 states and 352 transitions. Second operand 68 states. [2018-10-10 15:21:44,122 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:21:45,749 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:21:48,994 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:21:51,143 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:21:52,392 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:21:54,155 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:21:56,391 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:21:59,188 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2018-10-10 15:22:00,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:22:00,570 INFO L93 Difference]: Finished difference Result 374 states and 374 transitions. [2018-10-10 15:22:00,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-10-10 15:22:00,570 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 351 [2018-10-10 15:22:00,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:22:00,572 INFO L225 Difference]: With dead ends: 374 [2018-10-10 15:22:00,572 INFO L226 Difference]: Without dead ends: 374 [2018-10-10 15:22:00,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8218 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=8154, Invalid=25886, Unknown=0, NotChecked=0, Total=34040 [2018-10-10 15:22:00,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2018-10-10 15:22:00,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 364. [2018-10-10 15:22:00,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-10-10 15:22:00,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 364 transitions. [2018-10-10 15:22:00,578 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 364 transitions. Word has length 351 [2018-10-10 15:22:00,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:22:00,579 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 364 transitions. [2018-10-10 15:22:00,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-10 15:22:00,579 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 364 transitions. [2018-10-10 15:22:00,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-10-10 15:22:00,581 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:22:00,581 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:22:00,582 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:22:00,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:22:00,582 INFO L82 PathProgramCache]: Analyzing trace with hash 977161214, now seen corresponding path program 26 times [2018-10-10 15:22:00,583 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:22:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:22:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:22:03,909 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:22:03,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-10-10 15:22:03,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-10 15:22:03,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-10 15:22:03,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=775, Invalid=4055, Unknown=0, NotChecked=0, Total=4830 [2018-10-10 15:22:03,911 INFO L87 Difference]: Start difference. First operand 364 states and 364 transitions. Second operand 70 states. [2018-10-10 15:22:06,968 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:08,071 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:09,447 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:22:09,674 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-10 15:22:11,272 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:13,345 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:14,914 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:15,684 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:17,249 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:18,874 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:19,761 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:20,068 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:22:20,687 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:23,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:22:23,763 INFO L93 Difference]: Finished difference Result 386 states and 386 transitions. [2018-10-10 15:22:23,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-10-10 15:22:23,763 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 363 [2018-10-10 15:22:23,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:22:23,765 INFO L225 Difference]: With dead ends: 386 [2018-10-10 15:22:23,765 INFO L226 Difference]: Without dead ends: 386 [2018-10-10 15:22:23,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8540 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=8294, Invalid=27238, Unknown=0, NotChecked=0, Total=35532 [2018-10-10 15:22:23,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2018-10-10 15:22:23,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 376. [2018-10-10 15:22:23,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2018-10-10 15:22:23,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 376 transitions. [2018-10-10 15:22:23,771 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 376 transitions. Word has length 363 [2018-10-10 15:22:23,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:22:23,772 INFO L481 AbstractCegarLoop]: Abstraction has 376 states and 376 transitions. [2018-10-10 15:22:23,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-10 15:22:23,772 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 376 transitions. [2018-10-10 15:22:23,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-10-10 15:22:23,774 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:22:23,774 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:22:23,774 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:22:23,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:22:23,775 INFO L82 PathProgramCache]: Analyzing trace with hash -2034966780, now seen corresponding path program 27 times [2018-10-10 15:22:23,775 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:22:23,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:22:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:22:26,603 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:22:26,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-10-10 15:22:26,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-10 15:22:26,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-10 15:22:26,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=883, Invalid=4229, Unknown=0, NotChecked=0, Total=5112 [2018-10-10 15:22:26,604 INFO L87 Difference]: Start difference. First operand 376 states and 376 transitions. Second operand 72 states. [2018-10-10 15:22:35,084 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:22:40,214 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:22:48,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:22:48,307 INFO L93 Difference]: Finished difference Result 398 states and 398 transitions. [2018-10-10 15:22:48,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-10 15:22:48,308 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 375 [2018-10-10 15:22:48,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:22:48,309 INFO L225 Difference]: With dead ends: 398 [2018-10-10 15:22:48,309 INFO L226 Difference]: Without dead ends: 398 [2018-10-10 15:22:48,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9429 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=9243, Invalid=29369, Unknown=0, NotChecked=0, Total=38612 [2018-10-10 15:22:48,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2018-10-10 15:22:48,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 388. [2018-10-10 15:22:48,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-10-10 15:22:48,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 388 transitions. [2018-10-10 15:22:48,315 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 388 transitions. Word has length 375 [2018-10-10 15:22:48,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:22:48,316 INFO L481 AbstractCegarLoop]: Abstraction has 388 states and 388 transitions. [2018-10-10 15:22:48,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-10 15:22:48,316 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 388 transitions. [2018-10-10 15:22:48,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-10-10 15:22:48,318 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:22:48,318 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:22:48,319 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:22:48,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:22:48,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1510401782, now seen corresponding path program 28 times [2018-10-10 15:22:48,320 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:22:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:22:51,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:22:51,553 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:22:51,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-10-10 15:22:51,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-10 15:22:51,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-10 15:22:51,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=4619, Unknown=0, NotChecked=0, Total=5402 [2018-10-10 15:22:51,554 INFO L87 Difference]: Start difference. First operand 388 states and 388 transitions. Second operand 74 states. [2018-10-10 15:22:54,789 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-10 15:22:54,952 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2018-10-10 15:22:55,476 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-10 15:22:55,691 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:22:56,201 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:22:56,373 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:22:56,856 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:22:57,036 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:22:57,551 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:22:57,737 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:22:58,250 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:22:58,440 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:22:58,967 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:22:59,168 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:22:59,722 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:22:59,949 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:23:00,507 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:23:00,768 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:23:01,358 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:23:01,581 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:23:02,177 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:23:02,405 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:23:03,009 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:23:03,248 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:23:03,852 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:23:04,096 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:23:04,719 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:23:04,992 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:23:05,636 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:23:05,925 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:23:06,610 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:23:06,884 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:23:07,555 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:23:07,829 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:23:08,495 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:23:08,779 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:23:09,459 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:23:09,747 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:23:10,480 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:23:10,781 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:23:11,090 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-10 15:23:11,564 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:23:11,867 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-10 15:23:12,576 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-10 15:23:12,874 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-10 15:23:13,391 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-10 15:23:13,666 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-10 15:23:15,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:23:15,622 INFO L93 Difference]: Finished difference Result 410 states and 410 transitions. [2018-10-10 15:23:15,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-10 15:23:15,623 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 387 [2018-10-10 15:23:15,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:23:15,625 INFO L225 Difference]: With dead ends: 410 [2018-10-10 15:23:15,625 INFO L226 Difference]: Without dead ends: 410 [2018-10-10 15:23:15,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9425 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=8673, Invalid=30729, Unknown=0, NotChecked=0, Total=39402 [2018-10-10 15:23:15,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2018-10-10 15:23:15,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 400. [2018-10-10 15:23:15,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2018-10-10 15:23:15,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 400 transitions. [2018-10-10 15:23:15,632 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 400 transitions. Word has length 387 [2018-10-10 15:23:15,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:23:15,632 INFO L481 AbstractCegarLoop]: Abstraction has 400 states and 400 transitions. [2018-10-10 15:23:15,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-10 15:23:15,633 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 400 transitions. [2018-10-10 15:23:15,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-10-10 15:23:15,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:23:15,635 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:23:15,635 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:23:15,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:23:15,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1170766352, now seen corresponding path program 29 times [2018-10-10 15:23:15,636 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:23:15,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:23:18,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 5017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:23:18,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:23:18,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-10-10 15:23:18,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-10 15:23:18,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-10 15:23:18,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1003, Invalid=4697, Unknown=0, NotChecked=0, Total=5700 [2018-10-10 15:23:18,702 INFO L87 Difference]: Start difference. First operand 400 states and 400 transitions. Second operand 76 states. [2018-10-10 15:23:21,948 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-10 15:23:26,184 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:23:27,361 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:23:31,497 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:23:36,403 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:23:42,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:23:42,383 INFO L93 Difference]: Finished difference Result 422 states and 422 transitions. [2018-10-10 15:23:42,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-10-10 15:23:42,384 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 399 [2018-10-10 15:23:42,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:23:42,386 INFO L225 Difference]: With dead ends: 422 [2018-10-10 15:23:42,386 INFO L226 Difference]: Without dead ends: 422 [2018-10-10 15:23:42,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10724 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=10400, Invalid=33072, Unknown=0, NotChecked=0, Total=43472 [2018-10-10 15:23:42,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2018-10-10 15:23:42,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 412. [2018-10-10 15:23:42,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-10-10 15:23:42,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 412 transitions. [2018-10-10 15:23:42,393 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 412 transitions. Word has length 399 [2018-10-10 15:23:42,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:23:42,393 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 412 transitions. [2018-10-10 15:23:42,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-10 15:23:42,393 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 412 transitions. [2018-10-10 15:23:42,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-10-10 15:23:42,395 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:23:42,395 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:23:42,395 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:23:42,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:23:42,396 INFO L82 PathProgramCache]: Analyzing trace with hash -476020202, now seen corresponding path program 30 times [2018-10-10 15:23:42,396 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:23:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:23:45,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:23:45,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:23:45,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-10-10 15:23:45,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-10 15:23:45,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-10 15:23:45,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1007, Invalid=4999, Unknown=0, NotChecked=0, Total=6006 [2018-10-10 15:23:45,464 INFO L87 Difference]: Start difference. First operand 412 states and 412 transitions. Second operand 78 states. [2018-10-10 15:23:48,477 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:23:48,923 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:49,484 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:49,631 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:23:50,651 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:51,939 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:52,156 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:23:52,632 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:53,293 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:54,169 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:23:55,377 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:56,102 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:56,855 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:57,146 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:23:57,777 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:58,551 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:59,347 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:24:00,399 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:24:02,154 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:24:02,815 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:24:03,960 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:24:04,626 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:24:04,896 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:24:05,837 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:24:06,530 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:24:06,827 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:24:07,594 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:24:07,886 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-10 15:24:08,577 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-10 15:24:10,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:24:10,128 INFO L93 Difference]: Finished difference Result 434 states and 434 transitions. [2018-10-10 15:24:10,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-10-10 15:24:10,129 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 411 [2018-10-10 15:24:10,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:24:10,130 INFO L225 Difference]: With dead ends: 434 [2018-10-10 15:24:10,130 INFO L226 Difference]: Without dead ends: 434 [2018-10-10 15:24:10,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11090 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=10556, Invalid=34600, Unknown=0, NotChecked=0, Total=45156 [2018-10-10 15:24:10,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-10-10 15:24:10,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 424. [2018-10-10 15:24:10,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-10-10 15:24:10,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 424 transitions. [2018-10-10 15:24:10,136 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 424 transitions. Word has length 411 [2018-10-10 15:24:10,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:24:10,137 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 424 transitions. [2018-10-10 15:24:10,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-10 15:24:10,137 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 424 transitions. [2018-10-10 15:24:10,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-10-10 15:24:10,139 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:24:10,140 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:24:10,140 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:24:10,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:24:10,140 INFO L82 PathProgramCache]: Analyzing trace with hash 750694684, now seen corresponding path program 31 times [2018-10-10 15:24:10,141 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:24:10,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:24:13,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:24:13,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:24:13,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-10 15:24:13,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-10 15:24:13,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-10 15:24:13,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1131, Invalid=5189, Unknown=0, NotChecked=0, Total=6320 [2018-10-10 15:24:13,548 INFO L87 Difference]: Start difference. First operand 424 states and 424 transitions. Second operand 80 states. [2018-10-10 15:24:17,346 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:24:17,532 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:24:20,466 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:24:26,134 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:24:27,622 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:24:38,090 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:24:39,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:24:39,903 INFO L93 Difference]: Finished difference Result 446 states and 446 transitions. [2018-10-10 15:24:39,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-10-10 15:24:39,903 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 423 [2018-10-10 15:24:39,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:24:39,905 INFO L225 Difference]: With dead ends: 446 [2018-10-10 15:24:39,905 INFO L226 Difference]: Without dead ends: 446 [2018-10-10 15:24:39,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12103 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=11625, Invalid=36995, Unknown=0, NotChecked=0, Total=48620 [2018-10-10 15:24:39,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2018-10-10 15:24:39,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 436. [2018-10-10 15:24:39,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2018-10-10 15:24:39,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 436 transitions. [2018-10-10 15:24:39,911 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 436 transitions. Word has length 423 [2018-10-10 15:24:39,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:24:39,912 INFO L481 AbstractCegarLoop]: Abstraction has 436 states and 436 transitions. [2018-10-10 15:24:39,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-10 15:24:39,912 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 436 transitions. [2018-10-10 15:24:39,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-10-10 15:24:39,914 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:24:39,915 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:24:39,915 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:24:39,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:24:39,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1579190050, now seen corresponding path program 32 times [2018-10-10 15:24:39,916 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:24:39,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:24:45,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 0 proven. 6112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:24:45,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:24:45,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-10 15:24:45,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-10 15:24:45,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-10 15:24:45,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=6090, Unknown=0, NotChecked=0, Total=6320 [2018-10-10 15:24:45,019 INFO L87 Difference]: Start difference. First operand 436 states and 436 transitions. Second operand 80 states. [2018-10-10 15:25:16,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:25:16,888 INFO L93 Difference]: Finished difference Result 458 states and 458 transitions. [2018-10-10 15:25:16,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-10-10 15:25:16,888 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 435 [2018-10-10 15:25:16,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:25:16,890 INFO L225 Difference]: With dead ends: 458 [2018-10-10 15:25:16,890 INFO L226 Difference]: Without dead ends: 458 [2018-10-10 15:25:16,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6811 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=2751, Invalid=35079, Unknown=0, NotChecked=0, Total=37830 [2018-10-10 15:25:16,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2018-10-10 15:25:16,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 448. [2018-10-10 15:25:16,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2018-10-10 15:25:16,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 448 transitions. [2018-10-10 15:25:16,896 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 448 transitions. Word has length 435 [2018-10-10 15:25:16,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:25:16,897 INFO L481 AbstractCegarLoop]: Abstraction has 448 states and 448 transitions. [2018-10-10 15:25:16,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-10 15:25:16,897 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 448 transitions. [2018-10-10 15:25:16,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2018-10-10 15:25:16,899 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:25:16,899 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:25:16,899 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:25:16,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:25:16,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1534884824, now seen corresponding path program 33 times [2018-10-10 15:25:16,900 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:25:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:25:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:25:20,587 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:25:20,587 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2018-10-10 15:25:20,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-10 15:25:20,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-10 15:25:20,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1267, Invalid=5705, Unknown=0, NotChecked=0, Total=6972 [2018-10-10 15:25:20,588 INFO L87 Difference]: Start difference. First operand 448 states and 448 transitions. Second operand 84 states. [2018-10-10 15:25:23,907 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-10 15:25:24,068 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:25:24,321 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-10 15:25:29,407 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:25:34,193 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-10 15:25:34,434 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:25:39,366 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:25:39,706 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:25:44,481 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-10 15:25:48,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:25:48,817 INFO L93 Difference]: Finished difference Result 470 states and 470 transitions. [2018-10-10 15:25:48,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-10-10 15:25:48,817 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 447 [2018-10-10 15:25:48,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:25:48,819 INFO L225 Difference]: With dead ends: 470 [2018-10-10 15:25:48,819 INFO L226 Difference]: Without dead ends: 470 [2018-10-10 15:25:48,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13566 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=12918, Invalid=41138, Unknown=0, NotChecked=0, Total=54056 [2018-10-10 15:25:48,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2018-10-10 15:25:48,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 460. [2018-10-10 15:25:48,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2018-10-10 15:25:48,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 460 transitions. [2018-10-10 15:25:48,827 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 460 transitions. Word has length 447 [2018-10-10 15:25:48,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:25:48,827 INFO L481 AbstractCegarLoop]: Abstraction has 460 states and 460 transitions. [2018-10-10 15:25:48,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-10 15:25:48,828 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 460 transitions. [2018-10-10 15:25:48,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2018-10-10 15:25:48,830 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:25:48,831 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:25:48,831 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:25:48,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:25:48,831 INFO L82 PathProgramCache]: Analyzing trace with hash 2087004206, now seen corresponding path program 34 times [2018-10-10 15:25:48,832 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:25:48,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat