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-deref.i_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b8f97f7-m [2018-10-10 15:17:08,694 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-10 15:17:08,696 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-10 15:17:08,712 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-10 15:17:08,713 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-10 15:17:08,714 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-10 15:17:08,716 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-10 15:17:08,718 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-10 15:17:08,720 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-10 15:17:08,721 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-10 15:17:08,723 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-10 15:17:08,723 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-10 15:17:08,724 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-10 15:17:08,727 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-10 15:17:08,734 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-10 15:17:08,735 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-10 15:17:08,739 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-10 15:17:08,741 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-10 15:17:08,744 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-10 15:17:08,746 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-10 15:17:08,748 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-10 15:17:08,749 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-10 15:17:08,753 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-10 15:17:08,753 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-10 15:17:08,753 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-10 15:17:08,754 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-10 15:17:08,755 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-10 15:17:08,756 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-10 15:17:08,756 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-10 15:17:08,757 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-10 15:17:08,757 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-10 15:17:08,758 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-10 15:17:08,758 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-10 15:17:08,759 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-10 15:17:08,760 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-10 15:17:08,760 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-10 15:17:08,761 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 15:17:08,770 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-10 15:17:08,770 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-10 15:17:08,771 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-10 15:17:08,771 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-10 15:17:08,771 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-10 15:17:08,772 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-10 15:17:08,772 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-10 15:17:08,773 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-10 15:17:08,773 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-10 15:17:08,773 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-10 15:17:08,773 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-10 15:17:08,773 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-10 15:17:08,774 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-10 15:17:08,774 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-10 15:17:08,775 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-10 15:17:08,820 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-10 15:17:08,834 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-10 15:17:08,839 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-10 15:17:08,840 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-10 15:17:08,841 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-10 15:17:08,841 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_false-valid-deref.i_5.bpl [2018-10-10 15:17:08,842 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_false-valid-deref.i_5.bpl' [2018-10-10 15:17:08,908 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-10 15:17:08,909 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-10-10 15:17:08,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-10 15:17:08,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-10 15:17:08,911 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-10 15:17:08,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:17:08" (1/1) ... [2018-10-10 15:17:08,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:17:08" (1/1) ... [2018-10-10 15:17:08,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:17:08" (1/1) ... [2018-10-10 15:17:08,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:17:08" (1/1) ... [2018-10-10 15:17:08,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:17:08" (1/1) ... [2018-10-10 15:17:08,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:17:08" (1/1) ... [2018-10-10 15:17:08,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:17:08" (1/1) ... [2018-10-10 15:17:08,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-10 15:17:08,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-10 15:17:08,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-10 15:17:08,966 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-10 15:17:08,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:17:08" (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 15:17:09,038 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-10 15:17:09,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-10 15:17:09,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-10 15:17:09,768 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-10 15:17:09,769 INFO L202 PluginConnector]: Adding new model 960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 03:17:09 BoogieIcfgContainer [2018-10-10 15:17:09,769 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-10 15:17:09,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-10 15:17:09,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-10 15:17:09,774 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-10 15:17:09,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:17:08" (1/2) ... [2018-10-10 15:17:09,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bdafce6 and model type 960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 03:17:09, skipping insertion in model container [2018-10-10 15:17:09,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 03:17:09" (2/2) ... [2018-10-10 15:17:09,778 INFO L112 eAbstractionObserver]: Analyzing ICFG 960521-1_false-valid-deref.i_5.bpl [2018-10-10 15:17:09,788 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-10-10 15:17:09,798 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-10 15:17:09,815 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-10 15:17:09,842 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-10 15:17:09,843 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-10 15:17:09,843 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-10 15:17:09,843 INFO L384 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-10-10 15:17:09,843 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-10 15:17:09,843 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-10 15:17:09,844 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-10 15:17:09,844 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-10 15:17:09,844 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-10 15:17:09,861 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2018-10-10 15:17:09,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-10 15:17:09,872 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:09,872 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 15:17:09,874 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:09,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:09,879 INFO L82 PathProgramCache]: Analyzing trace with hash -412527006, now seen corresponding path program 1 times [2018-10-10 15:17:09,928 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:10,636 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-10 15:17:10,954 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 15:17:10,957 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-10 15:17:10,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2018-10-10 15:17:10,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-10 15:17:10,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-10 15:17:10,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-10-10 15:17:10,983 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 14 states. [2018-10-10 15:17:11,657 WARN L178 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-10-10 15:17:12,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:17:12,515 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-10 15:17:12,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-10 15:17:12,517 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2018-10-10 15:17:12,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:17:12,530 INFO L225 Difference]: With dead ends: 74 [2018-10-10 15:17:12,530 INFO L226 Difference]: Without dead ends: 74 [2018-10-10 15:17:12,533 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2018-10-10 15:17:12,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-10 15:17:12,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2018-10-10 15:17:12,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-10 15:17:12,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-10 15:17:12,580 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 51 [2018-10-10 15:17:12,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:17:12,580 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-10 15:17:12,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-10 15:17:12,581 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-10 15:17:12,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-10 15:17:12,583 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:12,583 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 15:17:12,584 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:12,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:12,585 INFO L82 PathProgramCache]: Analyzing trace with hash 349139816, now seen corresponding path program 1 times [2018-10-10 15:17:12,586 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:13,144 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 15:17:13,144 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:17:13,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-10 15:17:13,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-10 15:17:13,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-10 15:17:13,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2018-10-10 15:17:13,148 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 17 states. [2018-10-10 15:17:13,758 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2018-10-10 15:17:14,816 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-10 15:17:14,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:17:14,984 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-10 15:17:14,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-10 15:17:14,985 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2018-10-10 15:17:14,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:17:14,987 INFO L225 Difference]: With dead ends: 86 [2018-10-10 15:17:14,988 INFO L226 Difference]: Without dead ends: 86 [2018-10-10 15:17:14,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=388, Invalid=1094, Unknown=0, NotChecked=0, Total=1482 [2018-10-10 15:17:14,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-10 15:17:14,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2018-10-10 15:17:14,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-10 15:17:14,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-10 15:17:14,999 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 63 [2018-10-10 15:17:14,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:17:14,999 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-10 15:17:15,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-10 15:17:15,000 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-10 15:17:15,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-10 15:17:15,002 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:15,003 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 15:17:15,003 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:15,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:15,003 INFO L82 PathProgramCache]: Analyzing trace with hash -939247762, now seen corresponding path program 2 times [2018-10-10 15:17:15,004 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:15,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:15,468 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 15:17:15,469 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:17:15,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-10 15:17:15,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-10 15:17:15,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-10 15:17:15,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2018-10-10 15:17:15,471 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 20 states. [2018-10-10 15:17:16,588 WARN L178 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2018-10-10 15:17:17,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:17:17,774 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-10 15:17:17,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-10 15:17:17,775 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2018-10-10 15:17:17,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:17:17,777 INFO L225 Difference]: With dead ends: 98 [2018-10-10 15:17:17,777 INFO L226 Difference]: Without dead ends: 98 [2018-10-10 15:17:17,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=471, Invalid=1509, Unknown=0, NotChecked=0, Total=1980 [2018-10-10 15:17:17,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-10 15:17:17,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2018-10-10 15:17:17,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-10 15:17:17,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-10 15:17:17,786 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 75 [2018-10-10 15:17:17,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:17:17,787 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-10 15:17:17,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-10 15:17:17,787 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-10 15:17:17,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-10 15:17:17,789 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:17,789 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 15:17:17,789 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:17,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:17,790 INFO L82 PathProgramCache]: Analyzing trace with hash 893723252, now seen corresponding path program 3 times [2018-10-10 15:17:17,791 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:18,418 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 15:17:18,419 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:17:18,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-10 15:17:18,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-10 15:17:18,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-10 15:17:18,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2018-10-10 15:17:18,420 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 22 states. [2018-10-10 15:17:20,238 WARN L178 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-10 15:17:21,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:17:21,092 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-10 15:17:21,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-10 15:17:21,092 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 87 [2018-10-10 15:17:21,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:17:21,094 INFO L225 Difference]: With dead ends: 110 [2018-10-10 15:17:21,094 INFO L226 Difference]: Without dead ends: 110 [2018-10-10 15:17:21,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=547, Invalid=1903, Unknown=0, NotChecked=0, Total=2450 [2018-10-10 15:17:21,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-10 15:17:21,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2018-10-10 15:17:21,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-10 15:17:21,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-10 15:17:21,104 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 87 [2018-10-10 15:17:21,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:17:21,105 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-10 15:17:21,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-10 15:17:21,105 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-10 15:17:21,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-10 15:17:21,107 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:21,107 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 15:17:21,108 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:21,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:21,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1601194886, now seen corresponding path program 4 times [2018-10-10 15:17:21,109 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:21,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:21,723 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 15:17:21,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:17:21,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-10 15:17:21,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-10 15:17:21,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-10 15:17:21,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2018-10-10 15:17:21,725 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 24 states. [2018-10-10 15:17:22,818 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2018-10-10 15:17:24,580 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2018-10-10 15:17:24,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:17:24,677 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-10-10 15:17:24,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-10 15:17:24,685 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 99 [2018-10-10 15:17:24,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:17:24,687 INFO L225 Difference]: With dead ends: 122 [2018-10-10 15:17:24,687 INFO L226 Difference]: Without dead ends: 122 [2018-10-10 15:17:24,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=623, Invalid=2347, Unknown=0, NotChecked=0, Total=2970 [2018-10-10 15:17:24,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-10 15:17:24,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 112. [2018-10-10 15:17:24,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-10 15:17:24,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-10 15:17:24,696 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 99 [2018-10-10 15:17:24,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:17:24,697 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-10 15:17:24,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-10 15:17:24,697 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-10 15:17:24,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-10 15:17:24,699 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:24,699 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 15:17:24,700 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:24,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:24,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1113494144, now seen corresponding path program 5 times [2018-10-10 15:17:24,701 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:24,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:25,263 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 15:17:25,263 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:17:25,264 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-10 15:17:25,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-10 15:17:25,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-10 15:17:25,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2018-10-10 15:17:25,265 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 28 states. [2018-10-10 15:17:27,059 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:17:27,559 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:17:27,972 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:17:28,162 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2018-10-10 15:17:28,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:17:28,822 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-10-10 15:17:28,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-10 15:17:28,824 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 111 [2018-10-10 15:17:28,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:17:28,826 INFO L225 Difference]: With dead ends: 134 [2018-10-10 15:17:28,826 INFO L226 Difference]: Without dead ends: 134 [2018-10-10 15:17:28,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1004, Invalid=3156, Unknown=0, NotChecked=0, Total=4160 [2018-10-10 15:17:28,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-10 15:17:28,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 124. [2018-10-10 15:17:28,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-10 15:17:28,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-10-10 15:17:28,835 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 111 [2018-10-10 15:17:28,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:17:28,836 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-10-10 15:17:28,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-10 15:17:28,836 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-10-10 15:17:28,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-10 15:17:28,838 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:28,838 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 15:17:28,839 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:28,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:28,839 INFO L82 PathProgramCache]: Analyzing trace with hash 267898246, now seen corresponding path program 6 times [2018-10-10 15:17:28,840 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:30,109 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 15:17:30,110 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:17:30,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-10-10 15:17:30,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-10 15:17:30,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-10 15:17:30,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2018-10-10 15:17:30,111 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 30 states. [2018-10-10 15:17:32,415 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-10 15:17:33,354 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:17:34,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:17:34,545 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-10-10 15:17:34,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-10 15:17:34,546 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 123 [2018-10-10 15:17:34,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:17:34,547 INFO L225 Difference]: With dead ends: 146 [2018-10-10 15:17:34,547 INFO L226 Difference]: Without dead ends: 146 [2018-10-10 15:17:34,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1064, Invalid=3628, Unknown=0, NotChecked=0, Total=4692 [2018-10-10 15:17:34,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-10 15:17:34,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 136. [2018-10-10 15:17:34,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-10 15:17:34,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-10-10 15:17:34,557 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 123 [2018-10-10 15:17:34,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:17:34,557 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-10-10 15:17:34,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-10 15:17:34,558 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-10-10 15:17:34,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-10 15:17:34,560 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:34,560 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 15:17:34,560 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:34,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:34,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1255167116, now seen corresponding path program 7 times [2018-10-10 15:17:34,561 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:34,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:36,541 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 15:17:36,541 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:17:36,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-10 15:17:36,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-10 15:17:36,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-10 15:17:36,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2018-10-10 15:17:36,543 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 32 states. [2018-10-10 15:17:37,235 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-10 15:17:39,652 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:17:41,551 WARN L178 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2018-10-10 15:17:42,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:17:42,179 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-10-10 15:17:42,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-10 15:17:42,180 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 135 [2018-10-10 15:17:42,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:17:42,182 INFO L225 Difference]: With dead ends: 158 [2018-10-10 15:17:42,182 INFO L226 Difference]: Without dead ends: 158 [2018-10-10 15:17:42,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1413, Invalid=4439, Unknown=0, NotChecked=0, Total=5852 [2018-10-10 15:17:42,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-10 15:17:42,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2018-10-10 15:17:42,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-10 15:17:42,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-10 15:17:42,191 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 135 [2018-10-10 15:17:42,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:17:42,191 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-10 15:17:42,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-10 15:17:42,192 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-10 15:17:42,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-10 15:17:42,194 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:42,194 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 15:17:42,194 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:42,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:42,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1322745198, now seen corresponding path program 8 times [2018-10-10 15:17:42,195 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:43,025 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 15:17:43,026 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:17:43,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-10 15:17:43,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-10 15:17:43,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-10 15:17:43,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2018-10-10 15:17:43,027 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 32 states. [2018-10-10 15:17:47,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:17:47,999 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2018-10-10 15:17:47,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-10 15:17:47,999 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 147 [2018-10-10 15:17:48,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:17:48,000 INFO L225 Difference]: With dead ends: 170 [2018-10-10 15:17:48,001 INFO L226 Difference]: Without dead ends: 170 [2018-10-10 15:17:48,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=927, Invalid=4623, Unknown=0, NotChecked=0, Total=5550 [2018-10-10 15:17:48,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-10 15:17:48,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2018-10-10 15:17:48,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-10 15:17:48,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-10-10 15:17:48,008 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 147 [2018-10-10 15:17:48,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:17:48,008 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-10-10 15:17:48,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-10 15:17:48,009 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-10-10 15:17:48,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-10 15:17:48,011 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:48,011 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 15:17:48,011 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:48,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:48,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1975375768, now seen corresponding path program 9 times [2018-10-10 15:17:48,013 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:48,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:49,104 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 15:17:49,104 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:17:49,104 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-10-10 15:17:49,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-10 15:17:49,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-10 15:17:49,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2018-10-10 15:17:49,106 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 36 states. [2018-10-10 15:17:52,909 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:17:53,516 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:17:53,725 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:17:55,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:17:55,099 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2018-10-10 15:17:55,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-10 15:17:55,099 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 159 [2018-10-10 15:17:55,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:17:55,101 INFO L225 Difference]: With dead ends: 182 [2018-10-10 15:17:55,101 INFO L226 Difference]: Without dead ends: 182 [2018-10-10 15:17:55,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1890, Invalid=5942, Unknown=0, NotChecked=0, Total=7832 [2018-10-10 15:17:55,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-10 15:17:55,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 172. [2018-10-10 15:17:55,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-10-10 15:17:55,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2018-10-10 15:17:55,110 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 159 [2018-10-10 15:17:55,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:17:55,110 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2018-10-10 15:17:55,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-10 15:17:55,111 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2018-10-10 15:17:55,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-10 15:17:55,113 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:55,113 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 15:17:55,113 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:55,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:55,114 INFO L82 PathProgramCache]: Analyzing trace with hash 453890974, now seen corresponding path program 10 times [2018-10-10 15:17:55,114 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:55,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:56,059 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 15:17:56,059 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:17:56,059 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-10 15:17:56,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-10 15:17:56,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-10 15:17:56,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2018-10-10 15:17:56,061 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 38 states. [2018-10-10 15:17:58,503 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:17:58,671 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-10 15:17:59,568 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:18:00,320 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:18:00,726 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:18:01,296 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:18:02,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:18:02,722 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2018-10-10 15:18:02,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-10 15:18:02,723 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 171 [2018-10-10 15:18:02,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:18:02,725 INFO L225 Difference]: With dead ends: 194 [2018-10-10 15:18:02,725 INFO L226 Difference]: Without dead ends: 194 [2018-10-10 15:18:02,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1966, Invalid=6590, Unknown=0, NotChecked=0, Total=8556 [2018-10-10 15:18:02,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-10 15:18:02,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 184. [2018-10-10 15:18:02,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-10 15:18:02,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2018-10-10 15:18:02,732 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 171 [2018-10-10 15:18:02,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:18:02,732 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2018-10-10 15:18:02,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-10 15:18:02,733 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2018-10-10 15:18:02,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-10 15:18:02,734 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:18:02,735 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 15:18:02,735 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:18:02,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:18:02,735 INFO L82 PathProgramCache]: Analyzing trace with hash -749341020, now seen corresponding path program 11 times [2018-10-10 15:18:02,736 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:18:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:18:03,760 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 15:18:03,761 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:18:03,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-10 15:18:03,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-10 15:18:03,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-10 15:18:03,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1349, Unknown=0, NotChecked=0, Total=1560 [2018-10-10 15:18:03,762 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand 40 states. [2018-10-10 15:18:06,886 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-10 15:18:08,848 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:18:09,063 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:18:11,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:18:11,683 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2018-10-10 15:18:11,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-10 15:18:11,683 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 183 [2018-10-10 15:18:11,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:18:11,685 INFO L225 Difference]: With dead ends: 206 [2018-10-10 15:18:11,685 INFO L226 Difference]: Without dead ends: 206 [2018-10-10 15:18:11,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=2435, Invalid=7665, Unknown=0, NotChecked=0, Total=10100 [2018-10-10 15:18:11,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-10-10 15:18:11,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 196. [2018-10-10 15:18:11,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-10 15:18:11,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2018-10-10 15:18:11,693 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 183 [2018-10-10 15:18:11,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:18:11,693 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2018-10-10 15:18:11,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-10 15:18:11,694 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2018-10-10 15:18:11,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-10-10 15:18:11,695 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:18:11,695 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 15:18:11,695 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:18:11,696 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:18:11,696 INFO L82 PathProgramCache]: Analyzing trace with hash -527187798, now seen corresponding path program 12 times [2018-10-10 15:18:11,696 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:18:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:18:12,955 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 15:18:12,955 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:18:12,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-10-10 15:18:12,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-10 15:18:12,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-10 15:18:12,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2018-10-10 15:18:12,957 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 42 states. [2018-10-10 15:18:16,234 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-10 15:18:16,386 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2018-10-10 15:18:16,907 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-10 15:18:17,080 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:18:17,553 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:18:17,722 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:18:18,170 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:18:18,355 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:18:18,831 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:18:19,040 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-10 15:18:19,205 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2018-10-10 15:18:19,382 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2018-10-10 15:18:19,560 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-10 15:18:19,733 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-10 15:18:20,048 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-10 15:18:20,220 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-10 15:18:21,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:18:21,443 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2018-10-10 15:18:21,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-10 15:18:21,444 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 195 [2018-10-10 15:18:21,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:18:21,445 INFO L225 Difference]: With dead ends: 218 [2018-10-10 15:18:21,445 INFO L226 Difference]: Without dead ends: 218 [2018-10-10 15:18:21,446 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 15:18:21,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-10-10 15:18:21,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 208. [2018-10-10 15:18:21,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-10 15:18:21,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2018-10-10 15:18:21,451 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 195 [2018-10-10 15:18:21,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:18:21,451 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2018-10-10 15:18:21,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-10 15:18:21,451 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2018-10-10 15:18:21,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-10 15:18:21,452 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:18:21,453 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 15:18:21,453 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:18:21,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:18:21,453 INFO L82 PathProgramCache]: Analyzing trace with hash -192630352, now seen corresponding path program 13 times [2018-10-10 15:18:21,454 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:18:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:18:22,556 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 15:18:22,556 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:18:22,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-10 15:18:22,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-10 15:18:22,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-10 15:18:22,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1625, Unknown=0, NotChecked=0, Total=1892 [2018-10-10 15:18:22,558 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 44 states. [2018-10-10 15:18:25,632 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:18:29,543 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:18:31,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:18:31,201 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2018-10-10 15:18:31,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-10 15:18:31,202 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 207 [2018-10-10 15:18:31,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:18:31,203 INFO L225 Difference]: With dead ends: 230 [2018-10-10 15:18:31,204 INFO L226 Difference]: Without dead ends: 230 [2018-10-10 15:18:31,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2716 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=3048, Invalid=9608, Unknown=0, NotChecked=0, Total=12656 [2018-10-10 15:18:31,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-10-10 15:18:31,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 220. [2018-10-10 15:18:31,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-10 15:18:31,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 220 transitions. [2018-10-10 15:18:31,209 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 220 transitions. Word has length 207 [2018-10-10 15:18:31,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:18:31,210 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 220 transitions. [2018-10-10 15:18:31,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-10 15:18:31,210 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 220 transitions. [2018-10-10 15:18:31,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-10 15:18:31,211 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:18:31,212 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 15:18:31,212 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:18:31,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:18:31,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1868150346, now seen corresponding path program 14 times [2018-10-10 15:18:31,213 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:18:31,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:18:32,577 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 15:18:32,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:18:32,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-10 15:18:32,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-10 15:18:32,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-10 15:18:32,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1799, Unknown=0, NotChecked=0, Total=2070 [2018-10-10 15:18:32,579 INFO L87 Difference]: Start difference. First operand 220 states and 220 transitions. Second operand 46 states. [2018-10-10 15:18:35,237 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-10 15:18:35,795 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:18:36,320 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:18:37,438 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:18:37,602 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:18:38,031 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:18:38,613 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:18:38,797 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:18:39,411 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:18:39,829 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-10 15:18:40,009 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:18:40,657 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:18:42,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:18:42,248 INFO L93 Difference]: Finished difference Result 242 states and 242 transitions. [2018-10-10 15:18:42,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-10 15:18:42,249 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 219 [2018-10-10 15:18:42,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:18:42,251 INFO L225 Difference]: With dead ends: 242 [2018-10-10 15:18:42,251 INFO L226 Difference]: Without dead ends: 242 [2018-10-10 15:18:42,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2906 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=3140, Invalid=10432, Unknown=0, NotChecked=0, Total=13572 [2018-10-10 15:18:42,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-10-10 15:18:42,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 232. [2018-10-10 15:18:42,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-10-10 15:18:42,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2018-10-10 15:18:42,256 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 219 [2018-10-10 15:18:42,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:18:42,257 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2018-10-10 15:18:42,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-10 15:18:42,257 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2018-10-10 15:18:42,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-10-10 15:18:42,258 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:18:42,259 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 15:18:42,259 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:18:42,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:18:42,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1714817212, now seen corresponding path program 15 times [2018-10-10 15:18:42,260 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:18:42,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:18:43,735 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 15:18:43,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:18:43,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-10 15:18:43,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-10 15:18:43,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-10 15:18:43,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1925, Unknown=0, NotChecked=0, Total=2256 [2018-10-10 15:18:43,737 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand 48 states. [2018-10-10 15:18:49,992 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:18:53,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:18:53,614 INFO L93 Difference]: Finished difference Result 254 states and 254 transitions. [2018-10-10 15:18:53,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-10 15:18:53,614 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 231 [2018-10-10 15:18:53,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:18:53,616 INFO L225 Difference]: With dead ends: 254 [2018-10-10 15:18:53,616 INFO L226 Difference]: Without dead ends: 254 [2018-10-10 15:18:53,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3423 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=3729, Invalid=11771, Unknown=0, NotChecked=0, Total=15500 [2018-10-10 15:18:53,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-10-10 15:18:53,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 244. [2018-10-10 15:18:53,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-10-10 15:18:53,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 244 transitions. [2018-10-10 15:18:53,621 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 244 transitions. Word has length 231 [2018-10-10 15:18:53,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:18:53,622 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 244 transitions. [2018-10-10 15:18:53,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-10 15:18:53,622 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 244 transitions. [2018-10-10 15:18:53,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-10 15:18:53,623 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:18:53,624 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 15:18:53,624 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:18:53,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:18:53,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1238274366, now seen corresponding path program 16 times [2018-10-10 15:18:53,625 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:18:53,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:18:55,538 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 15:18:55,538 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:18:55,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-10 15:18:55,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-10 15:18:55,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-10 15:18:55,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2122, Unknown=0, NotChecked=0, Total=2256 [2018-10-10 15:18:55,539 INFO L87 Difference]: Start difference. First operand 244 states and 244 transitions. Second operand 48 states. [2018-10-10 15:19:06,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:19:06,211 INFO L93 Difference]: Finished difference Result 266 states and 266 transitions. [2018-10-10 15:19:06,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-10 15:19:06,212 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 243 [2018-10-10 15:19:06,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:19:06,213 INFO L225 Difference]: With dead ends: 266 [2018-10-10 15:19:06,214 INFO L226 Difference]: Without dead ends: 266 [2018-10-10 15:19:06,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2323 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1535, Invalid=11575, Unknown=0, NotChecked=0, Total=13110 [2018-10-10 15:19:06,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-10-10 15:19:06,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 256. [2018-10-10 15:19:06,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-10-10 15:19:06,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 256 transitions. [2018-10-10 15:19:06,219 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 256 transitions. Word has length 243 [2018-10-10 15:19:06,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:19:06,220 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 256 transitions. [2018-10-10 15:19:06,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-10 15:19:06,220 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 256 transitions. [2018-10-10 15:19:06,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-10-10 15:19:06,221 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:19:06,221 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 15:19:06,221 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:19:06,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:19:06,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1319765048, now seen corresponding path program 17 times [2018-10-10 15:19:06,222 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:19:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:19:08,637 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 15:19:08,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:19:08,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-10-10 15:19:08,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-10 15:19:08,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-10 15:19:08,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=2249, Unknown=0, NotChecked=0, Total=2652 [2018-10-10 15:19:08,639 INFO L87 Difference]: Start difference. First operand 256 states and 256 transitions. Second operand 52 states. [2018-10-10 15:19:13,310 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:19:15,581 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:19:21,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:19:21,430 INFO L93 Difference]: Finished difference Result 278 states and 278 transitions. [2018-10-10 15:19:21,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-10 15:19:21,431 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 255 [2018-10-10 15:19:21,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:19:21,432 INFO L225 Difference]: With dead ends: 278 [2018-10-10 15:19:21,433 INFO L226 Difference]: Without dead ends: 278 [2018-10-10 15:19:21,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4214 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=4478, Invalid=14154, Unknown=0, NotChecked=0, Total=18632 [2018-10-10 15:19:21,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-10-10 15:19:21,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 268. [2018-10-10 15:19:21,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-10-10 15:19:21,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 268 transitions. [2018-10-10 15:19:21,439 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 268 transitions. Word has length 255 [2018-10-10 15:19:21,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:19:21,439 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 268 transitions. [2018-10-10 15:19:21,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-10 15:19:21,439 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 268 transitions. [2018-10-10 15:19:21,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-10-10 15:19:21,441 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:19:21,441 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 15:19:21,441 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:19:21,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:19:21,442 INFO L82 PathProgramCache]: Analyzing trace with hash -668913714, now seen corresponding path program 18 times [2018-10-10 15:19:21,442 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:19:21,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:19:23,245 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 15:19:23,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:19:23,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-10-10 15:19:23,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-10 15:19:23,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-10 15:19:23,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2455, Unknown=0, NotChecked=0, Total=2862 [2018-10-10 15:19:23,247 INFO L87 Difference]: Start difference. First operand 268 states and 268 transitions. Second operand 54 states. [2018-10-10 15:19:27,843 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:19:28,447 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:19:29,616 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:19:30,937 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:19:31,607 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:19:32,947 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:19:33,144 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:19:33,648 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:19:33,866 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:19:34,394 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:19:35,142 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-10 15:19:36,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:19:36,428 INFO L93 Difference]: Finished difference Result 290 states and 290 transitions. [2018-10-10 15:19:36,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-10 15:19:36,429 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 267 [2018-10-10 15:19:36,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:19:36,431 INFO L225 Difference]: With dead ends: 290 [2018-10-10 15:19:36,431 INFO L226 Difference]: Without dead ends: 290 [2018-10-10 15:19:36,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4448 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=4586, Invalid=15154, Unknown=0, NotChecked=0, Total=19740 [2018-10-10 15:19:36,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-10-10 15:19:36,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 280. [2018-10-10 15:19:36,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-10-10 15:19:36,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 280 transitions. [2018-10-10 15:19:36,437 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 280 transitions. Word has length 267 [2018-10-10 15:19:36,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:19:36,438 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 280 transitions. [2018-10-10 15:19:36,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-10 15:19:36,438 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 280 transitions. [2018-10-10 15:19:36,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-10-10 15:19:36,440 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:19:36,440 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 15:19:36,440 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:19:36,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:19:36,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1523616468, now seen corresponding path program 19 times [2018-10-10 15:19:36,441 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:19:36,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:19:38,121 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 15:19:38,121 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:19:38,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-10-10 15:19:38,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-10 15:19:38,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-10 15:19:38,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=2597, Unknown=0, NotChecked=0, Total=3080 [2018-10-10 15:19:38,122 INFO L87 Difference]: Start difference. First operand 280 states and 280 transitions. Second operand 56 states. [2018-10-10 15:19:41,092 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:19:41,255 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:19:44,050 WARN L178 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-10 15:19:46,158 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:19:46,399 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:19:48,850 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:19:51,232 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2018-10-10 15:19:52,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:19:52,382 INFO L93 Difference]: Finished difference Result 302 states and 302 transitions. [2018-10-10 15:19:52,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-10 15:19:52,382 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 279 [2018-10-10 15:19:52,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:19:52,383 INFO L225 Difference]: With dead ends: 302 [2018-10-10 15:19:52,383 INFO L226 Difference]: Without dead ends: 302 [2018-10-10 15:19:52,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5089 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=5295, Invalid=16757, Unknown=0, NotChecked=0, Total=22052 [2018-10-10 15:19:52,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2018-10-10 15:19:52,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 292. [2018-10-10 15:19:52,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-10-10 15:19:52,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 292 transitions. [2018-10-10 15:19:52,389 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 292 transitions. Word has length 279 [2018-10-10 15:19:52,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:19:52,390 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 292 transitions. [2018-10-10 15:19:52,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-10 15:19:52,390 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 292 transitions. [2018-10-10 15:19:52,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-10-10 15:19:52,391 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:19:52,391 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 15:19:52,392 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:19:52,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:19:52,392 INFO L82 PathProgramCache]: Analyzing trace with hash 2036436186, now seen corresponding path program 20 times [2018-10-10 15:19:52,393 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:19:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:19:55,246 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 15:19:55,246 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:19:55,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-10-10 15:19:55,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-10 15:19:55,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-10 15:19:55,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=2891, Unknown=0, NotChecked=0, Total=3306 [2018-10-10 15:19:55,247 INFO L87 Difference]: Start difference. First operand 292 states and 292 transitions. Second operand 58 states. [2018-10-10 15:19:59,169 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-10 15:19:59,911 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-10 15:20:00,084 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:00,607 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:00,782 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:01,241 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:01,444 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:01,621 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-10 15:20:01,959 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:02,141 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:02,645 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:02,833 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:03,338 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:03,532 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:04,048 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:04,253 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:04,794 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:05,005 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:05,566 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:05,795 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:06,366 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:06,627 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:07,248 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:07,484 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:08,091 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:08,332 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-10 15:20:08,928 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-10 15:20:09,156 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-10 15:20:09,570 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-10 15:20:09,787 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-10 15:20:11,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:20:11,325 INFO L93 Difference]: Finished difference Result 314 states and 314 transitions. [2018-10-10 15:20:11,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-10 15:20:11,326 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 291 [2018-10-10 15:20:11,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:20:11,328 INFO L225 Difference]: With dead ends: 314 [2018-10-10 15:20:11,328 INFO L226 Difference]: Without dead ends: 314 [2018-10-10 15:20:11,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5093 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=4885, Invalid=17765, Unknown=0, NotChecked=0, Total=22650 [2018-10-10 15:20:11,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2018-10-10 15:20:11,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 304. [2018-10-10 15:20:11,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-10-10 15:20:11,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 304 transitions. [2018-10-10 15:20:11,334 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 304 transitions. Word has length 291 [2018-10-10 15:20:11,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:20:11,334 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 304 transitions. [2018-10-10 15:20:11,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-10 15:20:11,334 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 304 transitions. [2018-10-10 15:20:11,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-10-10 15:20:11,336 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:20:11,336 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 15:20:11,336 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:20:11,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:20:11,337 INFO L82 PathProgramCache]: Analyzing trace with hash -476989984, now seen corresponding path program 21 times [2018-10-10 15:20:11,337 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:20:11,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:20:13,669 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 15:20:13,670 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:20:13,670 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-10-10 15:20:13,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-10 15:20:13,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-10 15:20:13,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=2969, Unknown=0, NotChecked=0, Total=3540 [2018-10-10 15:20:13,671 INFO L87 Difference]: Start difference. First operand 304 states and 304 transitions. Second operand 60 states. [2018-10-10 15:20:16,745 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:20:16,907 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:20:22,094 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:20:27,233 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:20:28,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:20:28,629 INFO L93 Difference]: Finished difference Result 326 states and 326 transitions. [2018-10-10 15:20:28,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-10 15:20:28,632 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 303 [2018-10-10 15:20:28,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:20:28,633 INFO L225 Difference]: With dead ends: 326 [2018-10-10 15:20:28,633 INFO L226 Difference]: Without dead ends: 326 [2018-10-10 15:20:28,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6048 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=6180, Invalid=19580, Unknown=0, NotChecked=0, Total=25760 [2018-10-10 15:20:28,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2018-10-10 15:20:28,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 316. [2018-10-10 15:20:28,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-10-10 15:20:28,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 316 transitions. [2018-10-10 15:20:28,638 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 316 transitions. Word has length 303 [2018-10-10 15:20:28,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:20:28,639 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 316 transitions. [2018-10-10 15:20:28,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-10 15:20:28,639 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 316 transitions. [2018-10-10 15:20:28,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-10-10 15:20:28,641 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:20:28,641 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 15:20:28,642 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:20:28,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:20:28,642 INFO L82 PathProgramCache]: Analyzing trace with hash 417236454, now seen corresponding path program 22 times [2018-10-10 15:20:28,643 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:20:28,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:20:31,369 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 15:20:31,370 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:20:31,370 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-10-10 15:20:31,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-10 15:20:31,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-10 15:20:31,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=3207, Unknown=0, NotChecked=0, Total=3782 [2018-10-10 15:20:31,371 INFO L87 Difference]: Start difference. First operand 316 states and 316 transitions. Second operand 62 states. [2018-10-10 15:20:34,905 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:36,592 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:37,201 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:37,442 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:20:37,895 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:38,079 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:20:39,213 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:39,881 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:40,064 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:20:40,556 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:41,252 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:41,967 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:42,366 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-10 15:20:42,616 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-10 15:20:42,828 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:43,578 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:43,798 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:20:44,345 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:45,136 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:45,944 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:46,185 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-10 15:20:47,477 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2018-10-10 15:20:48,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:20:48,187 INFO L93 Difference]: Finished difference Result 338 states and 338 transitions. [2018-10-10 15:20:48,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-10 15:20:48,187 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 315 [2018-10-10 15:20:48,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:20:48,189 INFO L225 Difference]: With dead ends: 338 [2018-10-10 15:20:48,189 INFO L226 Difference]: Without dead ends: 338 [2018-10-10 15:20:48,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6326 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=6304, Invalid=20756, Unknown=0, NotChecked=0, Total=27060 [2018-10-10 15:20:48,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-10-10 15:20:48,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 328. [2018-10-10 15:20:48,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-10-10 15:20:48,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 328 transitions. [2018-10-10 15:20:48,195 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 328 transitions. Word has length 315 [2018-10-10 15:20:48,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:20:48,196 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 328 transitions. [2018-10-10 15:20:48,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-10 15:20:48,196 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 328 transitions. [2018-10-10 15:20:48,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-10-10 15:20:48,198 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:20:48,198 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 15:20:48,198 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:20:48,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:20:48,199 INFO L82 PathProgramCache]: Analyzing trace with hash -930775828, now seen corresponding path program 23 times [2018-10-10 15:20:48,199 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:20:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:20:50,560 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 15:20:50,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:20:50,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-10-10 15:20:50,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-10 15:20:50,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-10 15:20:50,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=667, Invalid=3365, Unknown=0, NotChecked=0, Total=4032 [2018-10-10 15:20:50,562 INFO L87 Difference]: Start difference. First operand 328 states and 328 transitions. Second operand 64 states. [2018-10-10 15:20:53,296 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-10 15:20:57,727 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:20:57,991 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:20:58,624 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:21:03,170 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-10 15:21:07,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:21:07,903 INFO L93 Difference]: Finished difference Result 350 states and 350 transitions. [2018-10-10 15:21:07,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-10-10 15:21:07,904 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 327 [2018-10-10 15:21:07,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:21:07,905 INFO L225 Difference]: With dead ends: 350 [2018-10-10 15:21:07,905 INFO L226 Difference]: Without dead ends: 350 [2018-10-10 15:21:07,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7091 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=7133, Invalid=22623, Unknown=0, NotChecked=0, Total=29756 [2018-10-10 15:21:07,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2018-10-10 15:21:07,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 340. [2018-10-10 15:21:07,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-10-10 15:21:07,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 340 transitions. [2018-10-10 15:21:07,910 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 340 transitions. Word has length 327 [2018-10-10 15:21:07,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:21:07,911 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 340 transitions. [2018-10-10 15:21:07,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-10 15:21:07,911 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 340 transitions. [2018-10-10 15:21:07,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-10-10 15:21:07,912 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:21:07,913 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 15:21:07,913 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:21:07,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:21:07,913 INFO L82 PathProgramCache]: Analyzing trace with hash 830741234, now seen corresponding path program 24 times [2018-10-10 15:21:07,914 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:21:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:21:10,290 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 15:21:10,290 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:21:10,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-10-10 15:21:10,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-10 15:21:10,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-10 15:21:10,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=3859, Unknown=0, NotChecked=0, Total=4290 [2018-10-10 15:21:10,292 INFO L87 Difference]: Start difference. First operand 340 states and 340 transitions. Second operand 66 states. [2018-10-10 15:21:13,308 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2018-10-10 15:21:14,712 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2018-10-10 15:21:14,887 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 49 [2018-10-10 15:21:15,484 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 49 [2018-10-10 15:21:15,671 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 49 [2018-10-10 15:21:16,283 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 49 [2018-10-10 15:21:16,482 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 49 [2018-10-10 15:21:17,113 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 49 [2018-10-10 15:21:17,330 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 49 [2018-10-10 15:21:17,687 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 49 [2018-10-10 15:21:18,011 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 56 [2018-10-10 15:21:18,303 WARN L178 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 15:21:18,527 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 15:21:18,751 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 15:21:18,993 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 15:21:19,237 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 15:21:19,408 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 15:21:19,595 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 15:21:19,843 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 15:21:20,093 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 15:21:20,274 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 15:21:20,465 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 15:21:20,737 WARN L178 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 15:21:20,994 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 15:21:21,183 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 15:21:21,378 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 15:21:21,638 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 15:21:21,905 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 15:21:22,097 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 15:21:22,291 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 15:21:22,556 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 15:21:22,837 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 15:21:23,030 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 15:21:23,244 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 15:21:23,568 WARN L178 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 15:21:23,854 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 15:21:24,051 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 15:21:24,253 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 15:21:24,528 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 15:21:24,809 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 58 [2018-10-10 15:21:25,018 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2018-10-10 15:21:25,222 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2018-10-10 15:21:25,495 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 57 [2018-10-10 15:21:25,796 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 58 [2018-10-10 15:21:26,285 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 57 [2018-10-10 15:21:26,556 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 58 [2018-10-10 15:21:27,028 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 57 [2018-10-10 15:21:27,287 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2018-10-10 15:21:27,754 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2018-10-10 15:21:27,996 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2018-10-10 15:21:28,489 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2018-10-10 15:21:28,799 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2018-10-10 15:21:29,232 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2018-10-10 15:21:31,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:21:31,096 INFO L93 Difference]: Finished difference Result 362 states and 362 transitions. [2018-10-10 15:21:31,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-10 15:21:31,096 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 339 [2018-10-10 15:21:31,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:21:31,097 INFO L225 Difference]: With dead ends: 362 [2018-10-10 15:21:31,098 INFO L226 Difference]: Without dead ends: 362 [2018-10-10 15:21:31,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6491 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=5471, Invalid=23599, Unknown=0, NotChecked=0, Total=29070 [2018-10-10 15:21:31,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2018-10-10 15:21:31,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 352. [2018-10-10 15:21:31,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-10-10 15:21:31,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 352 transitions. [2018-10-10 15:21:31,103 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 352 transitions. Word has length 339 [2018-10-10 15:21:31,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:21:31,103 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 352 transitions. [2018-10-10 15:21:31,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-10 15:21:31,103 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 352 transitions. [2018-10-10 15:21:31,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-10-10 15:21:31,105 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:21:31,106 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 15:21:31,106 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:21:31,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:21:31,106 INFO L82 PathProgramCache]: Analyzing trace with hash -2103975944, now seen corresponding path program 25 times [2018-10-10 15:21:31,107 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:21:31,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:21:34,326 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 15:21:34,327 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:21:34,327 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-10-10 15:21:34,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-10 15:21:34,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-10 15:21:34,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=771, Invalid=3785, Unknown=0, NotChecked=0, Total=4556 [2018-10-10 15:21:34,328 INFO L87 Difference]: Start difference. First operand 352 states and 352 transitions. Second operand 68 states. [2018-10-10 15:21:38,978 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:21:40,665 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:21:43,802 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:21:44,040 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:21:49,062 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:21:53,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:21:53,873 INFO L93 Difference]: Finished difference Result 374 states and 374 transitions. [2018-10-10 15:21:53,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-10-10 15:21:53,873 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 351 [2018-10-10 15:21:53,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:21:53,875 INFO L225 Difference]: With dead ends: 374 [2018-10-10 15:21:53,875 INFO L226 Difference]: Without dead ends: 374 [2018-10-10 15:21:53,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8218 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=8154, Invalid=25886, Unknown=0, NotChecked=0, Total=34040 [2018-10-10 15:21:53,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2018-10-10 15:21:53,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 364. [2018-10-10 15:21:53,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-10-10 15:21:53,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 364 transitions. [2018-10-10 15:21:53,882 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 364 transitions. Word has length 351 [2018-10-10 15:21:53,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:21:53,883 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 364 transitions. [2018-10-10 15:21:53,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-10 15:21:53,883 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 364 transitions. [2018-10-10 15:21:53,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-10-10 15:21:53,885 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:21:53,885 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:21:53,885 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:21:53,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:21:53,886 INFO L82 PathProgramCache]: Analyzing trace with hash 977161214, now seen corresponding path program 26 times [2018-10-10 15:21:53,886 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:21:53,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:21:56,490 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 15:21:56,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:21:56,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-10-10 15:21:56,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-10 15:21:56,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-10 15:21:56,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=775, Invalid=4055, Unknown=0, NotChecked=0, Total=4830 [2018-10-10 15:21:56,492 INFO L87 Difference]: Start difference. First operand 364 states and 364 transitions. Second operand 70 states. [2018-10-10 15:21:59,182 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-10 15:21:59,355 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:21:59,947 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:00,106 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:22:00,544 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:00,698 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:22:01,152 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:01,314 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:22:01,782 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:01,953 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:22:02,435 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:03,088 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:03,767 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:03,952 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:22:04,496 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:04,729 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:22:05,243 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:05,967 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:06,725 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:06,937 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:22:07,488 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:07,720 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:22:08,279 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:08,498 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:22:09,074 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:09,321 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:22:10,021 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:10,262 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:22:11,692 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:13,409 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:14,586 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-10 15:22:15,574 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2018-10-10 15:22:16,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:22:16,652 INFO L93 Difference]: Finished difference Result 386 states and 386 transitions. [2018-10-10 15:22:16,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-10-10 15:22:16,653 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 363 [2018-10-10 15:22:16,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:22:16,654 INFO L225 Difference]: With dead ends: 386 [2018-10-10 15:22:16,654 INFO L226 Difference]: Without dead ends: 386 [2018-10-10 15:22:16,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8540 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=8294, Invalid=27238, Unknown=0, NotChecked=0, Total=35532 [2018-10-10 15:22:16,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2018-10-10 15:22:16,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 376. [2018-10-10 15:22:16,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2018-10-10 15:22:16,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 376 transitions. [2018-10-10 15:22:16,660 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 376 transitions. Word has length 363 [2018-10-10 15:22:16,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:22:16,661 INFO L481 AbstractCegarLoop]: Abstraction has 376 states and 376 transitions. [2018-10-10 15:22:16,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-10 15:22:16,661 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 376 transitions. [2018-10-10 15:22:16,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-10-10 15:22:16,663 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:22:16,663 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 15:22:16,664 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:22:16,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:22:16,664 INFO L82 PathProgramCache]: Analyzing trace with hash -2034966780, now seen corresponding path program 27 times [2018-10-10 15:22:16,664 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:22:16,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:22:19,384 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 15:22:19,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:22:19,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-10-10 15:22:19,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-10 15:22:19,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-10 15:22:19,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=883, Invalid=4229, Unknown=0, NotChecked=0, Total=5112 [2018-10-10 15:22:19,385 INFO L87 Difference]: Start difference. First operand 376 states and 376 transitions. Second operand 72 states. [2018-10-10 15:22:24,841 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:22:29,861 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:22:34,983 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:22:35,293 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:22:40,352 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2018-10-10 15:22:41,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:22:41,136 INFO L93 Difference]: Finished difference Result 398 states and 398 transitions. [2018-10-10 15:22:41,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-10 15:22:41,137 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 375 [2018-10-10 15:22:41,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:22:41,139 INFO L225 Difference]: With dead ends: 398 [2018-10-10 15:22:41,139 INFO L226 Difference]: Without dead ends: 398 [2018-10-10 15:22:41,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9429 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=9243, Invalid=29369, Unknown=0, NotChecked=0, Total=38612 [2018-10-10 15:22:41,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2018-10-10 15:22:41,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 388. [2018-10-10 15:22:41,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-10-10 15:22:41,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 388 transitions. [2018-10-10 15:22:41,146 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 388 transitions. Word has length 375 [2018-10-10 15:22:41,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:22:41,147 INFO L481 AbstractCegarLoop]: Abstraction has 388 states and 388 transitions. [2018-10-10 15:22:41,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-10 15:22:41,147 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 388 transitions. [2018-10-10 15:22:41,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-10-10 15:22:41,149 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:22:41,149 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 15:22:41,150 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:22:41,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:22:41,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1510401782, now seen corresponding path program 28 times [2018-10-10 15:22:41,151 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:22:41,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:22:43,989 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 15:22:43,989 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:22:43,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-10-10 15:22:43,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-10 15:22:43,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-10 15:22:43,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=4619, Unknown=0, NotChecked=0, Total=5402 [2018-10-10 15:22:43,990 INFO L87 Difference]: Start difference. First operand 388 states and 388 transitions. Second operand 74 states. [2018-10-10 15:22:47,884 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-10 15:22:48,068 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:22:48,405 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-10 15:22:48,579 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:22:48,745 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:22:49,225 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:22:49,400 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:22:49,897 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:22:50,082 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:22:50,453 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-10 15:22:50,680 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:22:50,888 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:22:51,402 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:22:51,594 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:22:52,113 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:22:52,316 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:22:52,863 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:22:53,086 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:22:53,641 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:22:53,858 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:22:54,429 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:22:54,652 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:22:55,233 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:22:55,491 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:22:55,727 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-10 15:22:56,157 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:22:56,394 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:22:57,001 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:22:57,256 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:22:57,872 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:22:58,133 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:22:58,763 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:22:59,022 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:22:59,656 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:22:59,917 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:23:00,334 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-10 15:23:00,594 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:23:00,928 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:23:01,598 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:23:01,874 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:23:02,547 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:23:02,837 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:23:03,524 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:23:03,809 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-10 15:23:04,507 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-10 15:23:04,787 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-10 15:23:05,308 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-10 15:23:07,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:23:07,592 INFO L93 Difference]: Finished difference Result 410 states and 410 transitions. [2018-10-10 15:23:07,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-10 15:23:07,593 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 387 [2018-10-10 15:23:07,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:23:07,596 INFO L225 Difference]: With dead ends: 410 [2018-10-10 15:23:07,596 INFO L226 Difference]: Without dead ends: 410 [2018-10-10 15:23:07,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9425 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=8673, Invalid=30729, Unknown=0, NotChecked=0, Total=39402 [2018-10-10 15:23:07,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2018-10-10 15:23:07,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 400. [2018-10-10 15:23:07,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2018-10-10 15:23:07,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 400 transitions. [2018-10-10 15:23:07,603 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 400 transitions. Word has length 387 [2018-10-10 15:23:07,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:23:07,603 INFO L481 AbstractCegarLoop]: Abstraction has 400 states and 400 transitions. [2018-10-10 15:23:07,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-10 15:23:07,603 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 400 transitions. [2018-10-10 15:23:07,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-10-10 15:23:07,605 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:23:07,606 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 15:23:07,606 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:23:07,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:23:07,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1170766352, now seen corresponding path program 29 times [2018-10-10 15:23:07,607 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:23:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:23:10,657 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 15:23:10,658 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:23:10,658 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-10-10 15:23:10,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-10 15:23:10,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-10 15:23:10,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1003, Invalid=4697, Unknown=0, NotChecked=0, Total=5700 [2018-10-10 15:23:10,659 INFO L87 Difference]: Start difference. First operand 400 states and 400 transitions. Second operand 76 states. [2018-10-10 15:23:21,550 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:23:23,895 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:23:26,221 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:23:31,338 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:23:34,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:23:34,661 INFO L93 Difference]: Finished difference Result 422 states and 422 transitions. [2018-10-10 15:23:34,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-10-10 15:23:34,662 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 399 [2018-10-10 15:23:34,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:23:34,664 INFO L225 Difference]: With dead ends: 422 [2018-10-10 15:23:34,664 INFO L226 Difference]: Without dead ends: 422 [2018-10-10 15:23:34,665 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10724 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=10400, Invalid=33072, Unknown=0, NotChecked=0, Total=43472 [2018-10-10 15:23:34,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2018-10-10 15:23:34,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 412. [2018-10-10 15:23:34,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-10-10 15:23:34,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 412 transitions. [2018-10-10 15:23:34,670 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 412 transitions. Word has length 399 [2018-10-10 15:23:34,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:23:34,671 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 412 transitions. [2018-10-10 15:23:34,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-10 15:23:34,671 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 412 transitions. [2018-10-10 15:23:34,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-10-10 15:23:34,673 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:23:34,673 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 15:23:34,673 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:23:34,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:23:34,674 INFO L82 PathProgramCache]: Analyzing trace with hash -476020202, now seen corresponding path program 30 times [2018-10-10 15:23:34,674 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:23:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:23:38,171 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 15:23:38,172 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:23:38,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-10-10 15:23:38,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-10 15:23:38,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-10 15:23:38,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1007, Invalid=4999, Unknown=0, NotChecked=0, Total=6006 [2018-10-10 15:23:38,173 INFO L87 Difference]: Start difference. First operand 412 states and 412 transitions. Second operand 78 states. [2018-10-10 15:23:41,521 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:41,695 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:23:41,889 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-10 15:23:42,180 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:42,328 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:23:42,799 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:42,961 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:23:43,410 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:43,569 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:23:44,040 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:44,677 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:44,865 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:23:45,361 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:45,537 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:23:46,049 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:46,230 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:23:46,767 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:46,996 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:23:47,545 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:47,745 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:23:48,289 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:49,045 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:49,250 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:23:49,828 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:50,051 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:23:50,634 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:51,457 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:52,393 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:53,200 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:54,903 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:55,771 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:56,650 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:56,950 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:23:57,681 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:58,620 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:59,568 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:24:00,533 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:24:03,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:24:03,094 INFO L93 Difference]: Finished difference Result 434 states and 434 transitions. [2018-10-10 15:24:03,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-10-10 15:24:03,095 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 411 [2018-10-10 15:24:03,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:24:03,096 INFO L225 Difference]: With dead ends: 434 [2018-10-10 15:24:03,096 INFO L226 Difference]: Without dead ends: 434 [2018-10-10 15:24:03,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11090 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=10556, Invalid=34600, Unknown=0, NotChecked=0, Total=45156 [2018-10-10 15:24:03,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-10-10 15:24:03,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 424. [2018-10-10 15:24:03,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-10-10 15:24:03,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 424 transitions. [2018-10-10 15:24:03,103 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 424 transitions. Word has length 411 [2018-10-10 15:24:03,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:24:03,103 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 424 transitions. [2018-10-10 15:24:03,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-10 15:24:03,103 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 424 transitions. [2018-10-10 15:24:03,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-10-10 15:24:03,105 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:24:03,106 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 15:24:03,106 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:24:03,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:24:03,106 INFO L82 PathProgramCache]: Analyzing trace with hash 750694684, now seen corresponding path program 31 times [2018-10-10 15:24:03,107 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:24:03,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:24:06,725 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 15:24:06,725 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:24:06,726 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-10 15:24:06,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-10 15:24:06,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-10 15:24:06,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1131, Invalid=5189, Unknown=0, NotChecked=0, Total=6320 [2018-10-10 15:24:06,727 INFO L87 Difference]: Start difference. First operand 424 states and 424 transitions. Second operand 80 states. [2018-10-10 15:24:12,444 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:24:17,406 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-10 15:24:17,669 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:24:27,602 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:24:33,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:24:33,387 INFO L93 Difference]: Finished difference Result 446 states and 446 transitions. [2018-10-10 15:24:33,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-10-10 15:24:33,387 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 423 [2018-10-10 15:24:33,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:24:33,389 INFO L225 Difference]: With dead ends: 446 [2018-10-10 15:24:33,389 INFO L226 Difference]: Without dead ends: 446 [2018-10-10 15:24:33,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12103 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=11625, Invalid=36995, Unknown=0, NotChecked=0, Total=48620 [2018-10-10 15:24:33,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2018-10-10 15:24:33,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 436. [2018-10-10 15:24:33,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2018-10-10 15:24:33,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 436 transitions. [2018-10-10 15:24:33,395 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 436 transitions. Word has length 423 [2018-10-10 15:24:33,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:24:33,396 INFO L481 AbstractCegarLoop]: Abstraction has 436 states and 436 transitions. [2018-10-10 15:24:33,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-10 15:24:33,396 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 436 transitions. [2018-10-10 15:24:33,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-10-10 15:24:33,399 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:24:33,399 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 15:24:33,399 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:24:33,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:24:33,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1579190050, now seen corresponding path program 32 times [2018-10-10 15:24:33,400 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:24:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:24:38,961 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 15:24:38,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:24:38,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-10 15:24:38,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-10 15:24:38,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-10 15:24:38,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=6090, Unknown=0, NotChecked=0, Total=6320 [2018-10-10 15:24:38,963 INFO L87 Difference]: Start difference. First operand 436 states and 436 transitions. Second operand 80 states. [2018-10-10 15:25:10,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:25:10,156 INFO L93 Difference]: Finished difference Result 458 states and 458 transitions. [2018-10-10 15:25:10,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-10-10 15:25:10,156 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 435 [2018-10-10 15:25:10,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:25:10,159 INFO L225 Difference]: With dead ends: 458 [2018-10-10 15:25:10,159 INFO L226 Difference]: Without dead ends: 458 [2018-10-10 15:25:10,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6811 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=2751, Invalid=35079, Unknown=0, NotChecked=0, Total=37830 [2018-10-10 15:25:10,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2018-10-10 15:25:10,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 448. [2018-10-10 15:25:10,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2018-10-10 15:25:10,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 448 transitions. [2018-10-10 15:25:10,166 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 448 transitions. Word has length 435 [2018-10-10 15:25:10,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:25:10,166 INFO L481 AbstractCegarLoop]: Abstraction has 448 states and 448 transitions. [2018-10-10 15:25:10,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-10 15:25:10,166 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 448 transitions. [2018-10-10 15:25:10,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2018-10-10 15:25:10,169 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:25:10,169 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 15:25:10,169 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:25:10,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:25:10,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1534884824, now seen corresponding path program 33 times [2018-10-10 15:25:10,170 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:25:10,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:25:14,084 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 15:25:14,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:25:14,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2018-10-10 15:25:14,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-10 15:25:14,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-10 15:25:14,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1267, Invalid=5705, Unknown=0, NotChecked=0, Total=6972 [2018-10-10 15:25:14,085 INFO L87 Difference]: Start difference. First operand 448 states and 448 transitions. Second operand 84 states. [2018-10-10 15:25:18,123 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:25:19,144 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:25:23,979 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-10 15:25:24,232 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:25:25,167 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:25:34,288 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-10 15:25:39,521 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:25:42,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:25:42,341 INFO L93 Difference]: Finished difference Result 470 states and 470 transitions. [2018-10-10 15:25:42,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-10-10 15:25:42,341 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 447 [2018-10-10 15:25:42,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:25:42,343 INFO L225 Difference]: With dead ends: 470 [2018-10-10 15:25:42,343 INFO L226 Difference]: Without dead ends: 470 [2018-10-10 15:25:42,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13566 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=12918, Invalid=41138, Unknown=0, NotChecked=0, Total=54056 [2018-10-10 15:25:42,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2018-10-10 15:25:42,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 460. [2018-10-10 15:25:42,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2018-10-10 15:25:42,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 460 transitions. [2018-10-10 15:25:42,350 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 460 transitions. Word has length 447 [2018-10-10 15:25:42,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:25:42,350 INFO L481 AbstractCegarLoop]: Abstraction has 460 states and 460 transitions. [2018-10-10 15:25:42,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-10 15:25:42,350 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 460 transitions. [2018-10-10 15:25:42,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2018-10-10 15:25:42,353 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:25:42,353 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 15:25:42,353 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:25:42,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:25:42,354 INFO L82 PathProgramCache]: Analyzing trace with hash 2087004206, now seen corresponding path program 34 times [2018-10-10 15:25:42,354 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:25:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:25:46,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:25:46,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:25:46,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2018-10-10 15:25:46,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-10 15:25:46,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-10 15:25:46,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1271, Invalid=6039, Unknown=0, NotChecked=0, Total=7310 [2018-10-10 15:25:46,357 INFO L87 Difference]: Start difference. First operand 460 states and 460 transitions. Second operand 86 states. [2018-10-10 15:25:49,125 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-10 15:25:49,270 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:25:49,628 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-10 15:25:49,821 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:25:49,974 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:25:50,422 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:25:50,579 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57