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/bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b8f97f7-m [2018-10-10 15:28:28,149 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-10 15:28:28,152 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-10 15:28:28,163 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-10 15:28:28,164 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-10 15:28:28,165 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-10 15:28:28,166 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-10 15:28:28,168 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-10 15:28:28,169 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-10 15:28:28,170 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-10 15:28:28,171 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-10 15:28:28,172 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-10 15:28:28,172 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-10 15:28:28,173 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-10 15:28:28,175 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-10 15:28:28,175 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-10 15:28:28,176 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-10 15:28:28,178 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-10 15:28:28,180 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-10 15:28:28,182 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-10 15:28:28,183 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-10 15:28:28,184 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-10 15:28:28,187 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-10 15:28:28,187 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-10 15:28:28,187 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-10 15:28:28,188 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-10 15:28:28,189 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-10 15:28:28,190 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-10 15:28:28,191 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-10 15:28:28,192 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-10 15:28:28,192 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-10 15:28:28,193 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-10 15:28:28,202 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 15:28:28,215 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-10 15:28:28,219 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-10 15:28:28,220 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-10 15:28:28,220 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-10 15:28:28,220 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-10 15:28:28,220 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-10 15:28:28,221 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-10 15:28:28,221 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-10 15:28:28,222 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-10 15:28:28,222 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-10 15:28:28,222 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-10 15:28:28,222 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-10 15:28:28,223 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-10 15:28:28,223 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-10 15:28:28,224 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-10 15:28:28,266 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-10 15:28:28,278 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-10 15:28:28,282 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-10 15:28:28,287 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-10 15:28:28,288 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-10 15:28:28,288 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl [2018-10-10 15:28:28,289 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl' [2018-10-10 15:28:28,349 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-10 15:28:28,351 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-10-10 15:28:28,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-10 15:28:28,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-10 15:28:28,352 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-10 15:28:28,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:28:28" (1/1) ... [2018-10-10 15:28:28,381 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:28:28" (1/1) ... [2018-10-10 15:28:28,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:28:28" (1/1) ... [2018-10-10 15:28:28,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:28:28" (1/1) ... [2018-10-10 15:28:28,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:28:28" (1/1) ... [2018-10-10 15:28:28,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:28:28" (1/1) ... [2018-10-10 15:28:28,404 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:28:28" (1/1) ... [2018-10-10 15:28:28,406 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-10 15:28:28,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-10 15:28:28,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-10 15:28:28,407 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-10 15:28:28,408 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:28:28" (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 15:28:28,475 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-10 15:28:28,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-10 15:28:28,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-10 15:28:28,959 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-10 15:28:28,960 INFO L202 PluginConnector]: Adding new model bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 03:28:28 BoogieIcfgContainer [2018-10-10 15:28:28,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-10 15:28:28,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-10 15:28:28,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-10 15:28:28,966 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-10 15:28:28,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:28:28" (1/2) ... [2018-10-10 15:28:28,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@179a8aa and model type bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 03:28:28, skipping insertion in model container [2018-10-10 15:28:28,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 03:28:28" (2/2) ... [2018-10-10 15:28:28,970 INFO L112 eAbstractionObserver]: Analyzing ICFG bubblesort-alloca_true-valid-memsafety_true-termination.i_8.bpl [2018-10-10 15:28:28,980 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-10-10 15:28:28,989 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-10 15:28:29,006 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-10 15:28:29,036 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-10 15:28:29,037 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-10 15:28:29,037 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-10 15:28:29,037 INFO L384 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-10-10 15:28:29,037 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-10 15:28:29,038 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-10 15:28:29,038 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-10 15:28:29,038 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-10 15:28:29,038 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-10 15:28:29,058 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2018-10-10 15:28:29,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-10 15:28:29,068 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:28:29,069 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] [2018-10-10 15:28:29,070 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:28:29,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:28:29,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1412051856, now seen corresponding path program 1 times [2018-10-10 15:28:29,140 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:28:29,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:28:29,885 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 15:28:29,887 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-10 15:28:29,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-10-10 15:28:29,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-10 15:28:29,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-10 15:28:29,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-10-10 15:28:29,913 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 12 states. [2018-10-10 15:28:30,706 WARN L178 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2018-10-10 15:28:31,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:28:31,133 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2018-10-10 15:28:31,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-10 15:28:31,139 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2018-10-10 15:28:31,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:28:31,152 INFO L225 Difference]: With dead ends: 94 [2018-10-10 15:28:31,153 INFO L226 Difference]: Without dead ends: 94 [2018-10-10 15:28:31,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2018-10-10 15:28:31,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-10 15:28:31,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 62. [2018-10-10 15:28:31,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-10 15:28:31,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2018-10-10 15:28:31,198 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 35 [2018-10-10 15:28:31,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:28:31,198 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2018-10-10 15:28:31,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-10 15:28:31,199 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2018-10-10 15:28:31,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-10 15:28:31,201 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:28:31,202 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-10 15:28:31,203 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:28:31,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:28:31,203 INFO L82 PathProgramCache]: Analyzing trace with hash -776350115, now seen corresponding path program 1 times [2018-10-10 15:28:31,204 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:28:31,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:28:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:28:31,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:28:31,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-10-10 15:28:31,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-10 15:28:31,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-10 15:28:31,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2018-10-10 15:28:31,706 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 15 states. [2018-10-10 15:28:33,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:28:33,272 INFO L93 Difference]: Finished difference Result 155 states and 161 transitions. [2018-10-10 15:28:33,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-10 15:28:33,274 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2018-10-10 15:28:33,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:28:33,276 INFO L225 Difference]: With dead ends: 155 [2018-10-10 15:28:33,276 INFO L226 Difference]: Without dead ends: 155 [2018-10-10 15:28:33,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=295, Invalid=761, Unknown=0, NotChecked=0, Total=1056 [2018-10-10 15:28:33,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-10 15:28:33,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 85. [2018-10-10 15:28:33,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-10 15:28:33,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2018-10-10 15:28:33,290 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 58 [2018-10-10 15:28:33,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:28:33,291 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2018-10-10 15:28:33,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-10 15:28:33,291 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2018-10-10 15:28:33,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-10 15:28:33,294 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:28:33,294 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-10 15:28:33,295 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:28:33,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:28:33,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1496518192, now seen corresponding path program 2 times [2018-10-10 15:28:33,296 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:28:33,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:28:33,939 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:28:33,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:28:33,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-10-10 15:28:33,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-10 15:28:33,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-10 15:28:33,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2018-10-10 15:28:33,942 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 19 states. [2018-10-10 15:28:34,931 WARN L178 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2018-10-10 15:28:35,602 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2018-10-10 15:28:36,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:28:36,244 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2018-10-10 15:28:36,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-10 15:28:36,245 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2018-10-10 15:28:36,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:28:36,248 INFO L225 Difference]: With dead ends: 161 [2018-10-10 15:28:36,249 INFO L226 Difference]: Without dead ends: 161 [2018-10-10 15:28:36,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=365, Invalid=967, Unknown=0, NotChecked=0, Total=1332 [2018-10-10 15:28:36,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-10 15:28:36,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 110. [2018-10-10 15:28:36,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-10 15:28:36,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2018-10-10 15:28:36,260 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 81 [2018-10-10 15:28:36,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:28:36,261 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2018-10-10 15:28:36,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-10 15:28:36,261 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2018-10-10 15:28:36,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-10 15:28:36,265 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:28:36,265 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-10 15:28:36,265 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:28:36,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:28:36,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1037220109, now seen corresponding path program 1 times [2018-10-10 15:28:36,267 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:28:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:28:36,368 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-10 15:28:36,368 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-10 15:28:36,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-10 15:28:36,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-10 15:28:36,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-10 15:28:36,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-10-10 15:28:36,369 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 6 states. [2018-10-10 15:28:36,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:28:36,731 INFO L93 Difference]: Finished difference Result 136 states and 140 transitions. [2018-10-10 15:28:36,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-10 15:28:36,733 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2018-10-10 15:28:36,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:28:36,734 INFO L225 Difference]: With dead ends: 136 [2018-10-10 15:28:36,734 INFO L226 Difference]: Without dead ends: 132 [2018-10-10 15:28:36,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-10-10 15:28:36,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-10-10 15:28:36,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 111. [2018-10-10 15:28:36,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-10 15:28:36,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2018-10-10 15:28:36,743 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 87 [2018-10-10 15:28:36,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:28:36,743 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2018-10-10 15:28:36,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-10 15:28:36,744 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2018-10-10 15:28:36,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-10 15:28:36,745 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:28:36,745 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-10 15:28:36,746 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:28:36,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:28:36,746 INFO L82 PathProgramCache]: Analyzing trace with hash -917858694, now seen corresponding path program 2 times [2018-10-10 15:28:36,747 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:28:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:28:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 79 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-10 15:28:36,900 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:28:36,901 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-10-10 15:28:36,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-10 15:28:36,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-10 15:28:36,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-10-10 15:28:36,902 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand 11 states. [2018-10-10 15:28:37,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:28:37,057 INFO L93 Difference]: Finished difference Result 179 states and 182 transitions. [2018-10-10 15:28:37,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-10 15:28:37,061 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 110 [2018-10-10 15:28:37,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:28:37,062 INFO L225 Difference]: With dead ends: 179 [2018-10-10 15:28:37,063 INFO L226 Difference]: Without dead ends: 173 [2018-10-10 15:28:37,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2018-10-10 15:28:37,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-10 15:28:37,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 134. [2018-10-10 15:28:37,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-10 15:28:37,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2018-10-10 15:28:37,073 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 110 [2018-10-10 15:28:37,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:28:37,073 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2018-10-10 15:28:37,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-10 15:28:37,074 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2018-10-10 15:28:37,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-10 15:28:37,076 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:28:37,076 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2018-10-10 15:28:37,076 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:28:37,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:28:37,077 INFO L82 PathProgramCache]: Analyzing trace with hash -319558035, now seen corresponding path program 3 times [2018-10-10 15:28:37,077 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:28:37,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:28:37,312 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 61 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:28:37,313 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:28:37,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-10-10 15:28:37,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-10 15:28:37,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-10 15:28:37,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2018-10-10 15:28:37,314 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 15 states. [2018-10-10 15:28:37,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:28:37,633 INFO L93 Difference]: Finished difference Result 250 states and 253 transitions. [2018-10-10 15:28:37,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-10 15:28:37,637 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 133 [2018-10-10 15:28:37,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:28:37,639 INFO L225 Difference]: With dead ends: 250 [2018-10-10 15:28:37,639 INFO L226 Difference]: Without dead ends: 221 [2018-10-10 15:28:37,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2018-10-10 15:28:37,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-10-10 15:28:37,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 177. [2018-10-10 15:28:37,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-10-10 15:28:37,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2018-10-10 15:28:37,654 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 133 [2018-10-10 15:28:37,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:28:37,655 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2018-10-10 15:28:37,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-10 15:28:37,655 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2018-10-10 15:28:37,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-10 15:28:37,657 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:28:37,657 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2018-10-10 15:28:37,658 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:28:37,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:28:37,658 INFO L82 PathProgramCache]: Analyzing trace with hash 2016630042, now seen corresponding path program 4 times [2018-10-10 15:28:37,659 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:28:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:28:38,015 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 86 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:28:38,015 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:28:38,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-10 15:28:38,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-10 15:28:38,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-10 15:28:38,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2018-10-10 15:28:38,017 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand 17 states. [2018-10-10 15:28:38,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:28:38,602 INFO L93 Difference]: Finished difference Result 321 states and 324 transitions. [2018-10-10 15:28:38,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-10 15:28:38,603 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 156 [2018-10-10 15:28:38,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:28:38,605 INFO L225 Difference]: With dead ends: 321 [2018-10-10 15:28:38,605 INFO L226 Difference]: Without dead ends: 269 [2018-10-10 15:28:38,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=226, Invalid=830, Unknown=0, NotChecked=0, Total=1056 [2018-10-10 15:28:38,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-10-10 15:28:38,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 223. [2018-10-10 15:28:38,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-10-10 15:28:38,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 226 transitions. [2018-10-10 15:28:38,614 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 226 transitions. Word has length 156 [2018-10-10 15:28:38,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:28:38,615 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 226 transitions. [2018-10-10 15:28:38,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-10 15:28:38,615 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 226 transitions. [2018-10-10 15:28:38,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-10-10 15:28:38,617 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:28:38,618 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2018-10-10 15:28:38,618 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:28:38,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:28:38,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1576092723, now seen corresponding path program 5 times [2018-10-10 15:28:38,619 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:28:38,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:28:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 75 proven. 303 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:28:40,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:28:40,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-10-10 15:28:40,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-10 15:28:40,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-10 15:28:40,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2018-10-10 15:28:40,277 INFO L87 Difference]: Start difference. First operand 223 states and 226 transitions. Second operand 26 states. [2018-10-10 15:28:40,858 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2018-10-10 15:28:42,130 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2018-10-10 15:28:43,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:28:43,458 INFO L93 Difference]: Finished difference Result 225 states and 227 transitions. [2018-10-10 15:28:43,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-10 15:28:43,459 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 179 [2018-10-10 15:28:43,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:28:43,461 INFO L225 Difference]: With dead ends: 225 [2018-10-10 15:28:43,461 INFO L226 Difference]: Without dead ends: 225 [2018-10-10 15:28:43,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=673, Invalid=2519, Unknown=0, NotChecked=0, Total=3192 [2018-10-10 15:28:43,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-10-10 15:28:43,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2018-10-10 15:28:43,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-10-10 15:28:43,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 225 transitions. [2018-10-10 15:28:43,469 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 225 transitions. Word has length 179 [2018-10-10 15:28:43,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:28:43,469 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 225 transitions. [2018-10-10 15:28:43,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-10 15:28:43,469 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 225 transitions. [2018-10-10 15:28:43,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-10 15:28:43,472 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:28:43,473 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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] [2018-10-10 15:28:43,473 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:28:43,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:28:43,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1567944288, now seen corresponding path program 6 times [2018-10-10 15:28:43,474 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:28:43,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:28:44,014 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 139 proven. 382 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:28:44,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:28:44,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-10-10 15:28:44,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-10 15:28:44,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-10 15:28:44,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2018-10-10 15:28:44,016 INFO L87 Difference]: Start difference. First operand 223 states and 225 transitions. Second operand 21 states. [2018-10-10 15:28:44,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:28:44,583 INFO L93 Difference]: Finished difference Result 390 states and 393 transitions. [2018-10-10 15:28:44,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-10 15:28:44,583 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 202 [2018-10-10 15:28:44,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:28:44,586 INFO L225 Difference]: With dead ends: 390 [2018-10-10 15:28:44,586 INFO L226 Difference]: Without dead ends: 315 [2018-10-10 15:28:44,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=347, Invalid=1375, Unknown=0, NotChecked=0, Total=1722 [2018-10-10 15:28:44,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-10-10 15:28:44,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 269. [2018-10-10 15:28:44,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-10-10 15:28:44,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 272 transitions. [2018-10-10 15:28:44,593 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 272 transitions. Word has length 202 [2018-10-10 15:28:44,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:28:44,594 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 272 transitions. [2018-10-10 15:28:44,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-10 15:28:44,594 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 272 transitions. [2018-10-10 15:28:44,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-10-10 15:28:44,597 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:28:44,597 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2018-10-10 15:28:44,597 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:28:44,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:28:44,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1337365459, now seen corresponding path program 7 times [2018-10-10 15:28:44,599 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:28:44,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:28:45,589 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 97 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:28:45,590 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:28:45,590 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-10 15:28:45,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-10 15:28:45,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-10 15:28:45,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2018-10-10 15:28:45,591 INFO L87 Difference]: Start difference. First operand 269 states and 272 transitions. Second operand 32 states. [2018-10-10 15:28:48,713 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2018-10-10 15:28:48,893 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2018-10-10 15:28:49,149 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2018-10-10 15:28:49,294 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2018-10-10 15:28:49,745 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-10 15:28:50,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:28:50,129 INFO L93 Difference]: Finished difference Result 271 states and 273 transitions. [2018-10-10 15:28:50,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-10 15:28:50,130 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 225 [2018-10-10 15:28:50,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:28:50,133 INFO L225 Difference]: With dead ends: 271 [2018-10-10 15:28:50,133 INFO L226 Difference]: Without dead ends: 271 [2018-10-10 15:28:50,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=994, Invalid=4118, Unknown=0, NotChecked=0, Total=5112 [2018-10-10 15:28:50,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-10-10 15:28:50,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 269. [2018-10-10 15:28:50,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-10-10 15:28:50,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 271 transitions. [2018-10-10 15:28:50,140 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 271 transitions. Word has length 225 [2018-10-10 15:28:50,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:28:50,140 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 271 transitions. [2018-10-10 15:28:50,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-10 15:28:50,140 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 271 transitions. [2018-10-10 15:28:50,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-10-10 15:28:50,143 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:28:50,143 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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] [2018-10-10 15:28:50,143 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:28:50,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:28:50,144 INFO L82 PathProgramCache]: Analyzing trace with hash 2088988570, now seen corresponding path program 8 times [2018-10-10 15:28:50,145 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:28:50,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:28:50,554 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 215 proven. 661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:28:50,554 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:28:50,555 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-10-10 15:28:50,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-10 15:28:50,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-10 15:28:50,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2018-10-10 15:28:50,556 INFO L87 Difference]: Start difference. First operand 269 states and 271 transitions. Second operand 25 states. [2018-10-10 15:28:51,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:28:51,366 INFO L93 Difference]: Finished difference Result 459 states and 462 transitions. [2018-10-10 15:28:51,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-10 15:28:51,366 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 248 [2018-10-10 15:28:51,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:28:51,369 INFO L225 Difference]: With dead ends: 459 [2018-10-10 15:28:51,369 INFO L226 Difference]: Without dead ends: 361 [2018-10-10 15:28:51,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=494, Invalid=2056, Unknown=0, NotChecked=0, Total=2550 [2018-10-10 15:28:51,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2018-10-10 15:28:51,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 315. [2018-10-10 15:28:51,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-10-10 15:28:51,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 318 transitions. [2018-10-10 15:28:51,376 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 318 transitions. Word has length 248 [2018-10-10 15:28:51,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:28:51,377 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 318 transitions. [2018-10-10 15:28:51,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-10 15:28:51,377 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 318 transitions. [2018-10-10 15:28:51,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2018-10-10 15:28:51,378 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:28:51,379 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2018-10-10 15:28:51,379 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:28:51,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:28:51,379 INFO L82 PathProgramCache]: Analyzing trace with hash 629900237, now seen corresponding path program 9 times [2018-10-10 15:28:51,380 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:28:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:28:52,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 240 proven. 848 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:28:52,527 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:28:52,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-10-10 15:28:52,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-10 15:28:52,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-10 15:28:52,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2018-10-10 15:28:52,528 INFO L87 Difference]: Start difference. First operand 315 states and 318 transitions. Second operand 34 states. [2018-10-10 15:28:58,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:28:58,197 INFO L93 Difference]: Finished difference Result 317 states and 319 transitions. [2018-10-10 15:28:58,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-10 15:28:58,197 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 271 [2018-10-10 15:28:58,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:28:58,200 INFO L225 Difference]: With dead ends: 317 [2018-10-10 15:28:58,200 INFO L226 Difference]: Without dead ends: 317 [2018-10-10 15:28:58,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1035, Invalid=4817, Unknown=0, NotChecked=0, Total=5852 [2018-10-10 15:28:58,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2018-10-10 15:28:58,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 315. [2018-10-10 15:28:58,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-10-10 15:28:58,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 317 transitions. [2018-10-10 15:28:58,209 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 317 transitions. Word has length 271 [2018-10-10 15:28:58,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:28:58,210 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 317 transitions. [2018-10-10 15:28:58,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-10 15:28:58,211 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 317 transitions. [2018-10-10 15:28:58,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-10-10 15:28:58,212 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:28:58,213 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 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] [2018-10-10 15:28:58,214 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:28:58,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:28:58,214 INFO L82 PathProgramCache]: Analyzing trace with hash -434690464, now seen corresponding path program 10 times [2018-10-10 15:28:58,215 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:28:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:28:59,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1323 backedges. 314 proven. 1009 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:28:59,253 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:28:59,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-10-10 15:28:59,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-10 15:28:59,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-10 15:28:59,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2018-10-10 15:28:59,255 INFO L87 Difference]: Start difference. First operand 315 states and 317 transitions. Second operand 29 states. [2018-10-10 15:29:00,609 WARN L178 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2018-10-10 15:29:00,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:29:00,939 INFO L93 Difference]: Finished difference Result 528 states and 531 transitions. [2018-10-10 15:29:00,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-10 15:29:00,939 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 294 [2018-10-10 15:29:00,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:29:00,942 INFO L225 Difference]: With dead ends: 528 [2018-10-10 15:29:00,942 INFO L226 Difference]: Without dead ends: 407 [2018-10-10 15:29:00,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=667, Invalid=2873, Unknown=0, NotChecked=0, Total=3540 [2018-10-10 15:29:00,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2018-10-10 15:29:00,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 361. [2018-10-10 15:29:00,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2018-10-10 15:29:00,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 364 transitions. [2018-10-10 15:29:00,950 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 364 transitions. Word has length 294 [2018-10-10 15:29:00,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:29:00,951 INFO L481 AbstractCegarLoop]: Abstraction has 361 states and 364 transitions. [2018-10-10 15:29:00,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-10 15:29:00,951 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 364 transitions. [2018-10-10 15:29:00,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2018-10-10 15:29:00,953 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:29:00,953 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 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] [2018-10-10 15:29:00,953 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:29:00,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:29:00,953 INFO L82 PathProgramCache]: Analyzing trace with hash -210642605, now seen corresponding path program 11 times [2018-10-10 15:29:00,954 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:29:00,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:29:02,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1581 backedges. 262 proven. 1319 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:29:02,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:29:02,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-10 15:29:02,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-10 15:29:02,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-10 15:29:02,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1431, Unknown=0, NotChecked=0, Total=1560 [2018-10-10 15:29:02,441 INFO L87 Difference]: Start difference. First operand 361 states and 364 transitions. Second operand 40 states. [2018-10-10 15:29:07,097 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2018-10-10 15:29:07,248 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:29:07,691 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:29:07,843 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:29:08,271 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:29:08,419 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2018-10-10 15:29:08,857 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-10 15:29:09,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:29:09,269 INFO L93 Difference]: Finished difference Result 363 states and 365 transitions. [2018-10-10 15:29:09,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-10 15:29:09,269 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 317 [2018-10-10 15:29:09,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:29:09,273 INFO L225 Difference]: With dead ends: 363 [2018-10-10 15:29:09,273 INFO L226 Difference]: Without dead ends: 363 [2018-10-10 15:29:09,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1978 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1567, Invalid=7175, Unknown=0, NotChecked=0, Total=8742 [2018-10-10 15:29:09,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-10-10 15:29:09,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 361. [2018-10-10 15:29:09,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2018-10-10 15:29:09,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 363 transitions. [2018-10-10 15:29:09,282 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 363 transitions. Word has length 317 [2018-10-10 15:29:09,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:29:09,283 INFO L481 AbstractCegarLoop]: Abstraction has 361 states and 363 transitions. [2018-10-10 15:29:09,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-10 15:29:09,283 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 363 transitions. [2018-10-10 15:29:09,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-10-10 15:29:09,285 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:29:09,285 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 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] [2018-10-10 15:29:09,285 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:29:09,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:29:09,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1118960154, now seen corresponding path program 12 times [2018-10-10 15:29:09,286 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:29:09,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:29:11,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1862 backedges. 436 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:29:11,174 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:29:11,174 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-10-10 15:29:11,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-10 15:29:11,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-10 15:29:11,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2018-10-10 15:29:11,178 INFO L87 Difference]: Start difference. First operand 361 states and 363 transitions. Second operand 33 states. [2018-10-10 15:29:12,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:29:12,272 INFO L93 Difference]: Finished difference Result 597 states and 600 transitions. [2018-10-10 15:29:12,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-10 15:29:12,272 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 340 [2018-10-10 15:29:12,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:29:12,275 INFO L225 Difference]: With dead ends: 597 [2018-10-10 15:29:12,275 INFO L226 Difference]: Without dead ends: 453 [2018-10-10 15:29:12,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=866, Invalid=3826, Unknown=0, NotChecked=0, Total=4692 [2018-10-10 15:29:12,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2018-10-10 15:29:12,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 407. [2018-10-10 15:29:12,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2018-10-10 15:29:12,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 410 transitions. [2018-10-10 15:29:12,284 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 410 transitions. Word has length 340 [2018-10-10 15:29:12,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:29:12,284 INFO L481 AbstractCegarLoop]: Abstraction has 407 states and 410 transitions. [2018-10-10 15:29:12,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-10 15:29:12,285 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 410 transitions. [2018-10-10 15:29:12,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-10-10 15:29:12,286 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:29:12,287 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 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] [2018-10-10 15:29:12,287 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:29:12,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:29:12,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1947696077, now seen corresponding path program 13 times [2018-10-10 15:29:12,288 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:29:12,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:29:14,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2166 backedges. 379 proven. 1787 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:29:14,585 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:29:14,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-10 15:29:14,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-10 15:29:14,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-10 15:29:14,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1744, Unknown=0, NotChecked=0, Total=1892 [2018-10-10 15:29:14,587 INFO L87 Difference]: Start difference. First operand 407 states and 410 transitions. Second operand 44 states. [2018-10-10 15:29:17,815 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2018-10-10 15:29:19,444 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2018-10-10 15:29:19,673 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2018-10-10 15:29:19,921 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2018-10-10 15:29:20,114 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2018-10-10 15:29:20,408 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2018-10-10 15:29:20,723 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2018-10-10 15:29:20,886 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-10 15:29:21,071 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:29:21,232 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2018-10-10 15:29:21,421 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-10 15:29:21,579 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2018-10-10 15:29:22,020 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2018-10-10 15:29:22,171 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2018-10-10 15:29:22,574 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-10 15:29:22,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:29:22,964 INFO L93 Difference]: Finished difference Result 409 states and 411 transitions. [2018-10-10 15:29:22,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-10 15:29:22,964 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 363 [2018-10-10 15:29:22,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:29:22,967 INFO L225 Difference]: With dead ends: 409 [2018-10-10 15:29:22,967 INFO L226 Difference]: Without dead ends: 409 [2018-10-10 15:29:22,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2512 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1798, Invalid=8914, Unknown=0, NotChecked=0, Total=10712 [2018-10-10 15:29:22,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2018-10-10 15:29:22,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 407. [2018-10-10 15:29:22,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2018-10-10 15:29:22,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 409 transitions. [2018-10-10 15:29:22,976 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 409 transitions. Word has length 363 [2018-10-10 15:29:22,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:29:22,977 INFO L481 AbstractCegarLoop]: Abstraction has 407 states and 409 transitions. [2018-10-10 15:29:22,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-10 15:29:22,978 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 409 transitions. [2018-10-10 15:29:22,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2018-10-10 15:29:22,980 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:29:22,980 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 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] [2018-10-10 15:29:22,980 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:29:22,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:29:22,981 INFO L82 PathProgramCache]: Analyzing trace with hash -309055904, now seen corresponding path program 14 times [2018-10-10 15:29:22,981 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:29:23,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:29:23,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2493 backedges. 581 proven. 1912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:29:23,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:29:23,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-10-10 15:29:23,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-10 15:29:23,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-10 15:29:23,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2018-10-10 15:29:23,956 INFO L87 Difference]: Start difference. First operand 407 states and 409 transitions. Second operand 37 states. [2018-10-10 15:29:25,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:29:25,616 INFO L93 Difference]: Finished difference Result 666 states and 669 transitions. [2018-10-10 15:29:25,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-10 15:29:25,616 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 386 [2018-10-10 15:29:25,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:29:25,619 INFO L225 Difference]: With dead ends: 666 [2018-10-10 15:29:25,619 INFO L226 Difference]: Without dead ends: 499 [2018-10-10 15:29:25,621 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1606 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1091, Invalid=4915, Unknown=0, NotChecked=0, Total=6006 [2018-10-10 15:29:25,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2018-10-10 15:29:25,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 453. [2018-10-10 15:29:25,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2018-10-10 15:29:25,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 456 transitions. [2018-10-10 15:29:25,627 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 456 transitions. Word has length 386 [2018-10-10 15:29:25,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:29:25,627 INFO L481 AbstractCegarLoop]: Abstraction has 453 states and 456 transitions. [2018-10-10 15:29:25,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-10 15:29:25,627 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 456 transitions. [2018-10-10 15:29:25,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2018-10-10 15:29:25,629 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:29:25,630 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 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] [2018-10-10 15:29:25,630 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:29:25,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:29:25,631 INFO L82 PathProgramCache]: Analyzing trace with hash 669560531, now seen corresponding path program 15 times [2018-10-10 15:29:25,631 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:29:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:29:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2843 backedges. 519 proven. 2324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:29:27,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:29:27,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-10 15:29:27,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-10 15:29:27,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-10 15:29:27,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2067, Unknown=0, NotChecked=0, Total=2256 [2018-10-10 15:29:27,441 INFO L87 Difference]: Start difference. First operand 453 states and 456 transitions. Second operand 48 states. [2018-10-10 15:29:32,742 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2018-10-10 15:29:32,895 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:29:33,352 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:29:33,504 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:29:33,946 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:29:34,098 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:29:34,550 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:29:34,703 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:29:34,856 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-10-10 15:29:35,029 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2018-10-10 15:29:35,257 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:29:35,413 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2018-10-10 15:29:35,876 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-10 15:29:36,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:29:36,290 INFO L93 Difference]: Finished difference Result 455 states and 457 transitions. [2018-10-10 15:29:36,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-10 15:29:36,290 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 409 [2018-10-10 15:29:36,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:29:36,292 INFO L225 Difference]: With dead ends: 455 [2018-10-10 15:29:36,293 INFO L226 Difference]: Without dead ends: 455 [2018-10-10 15:29:36,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3267 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=2264, Invalid=11076, Unknown=0, NotChecked=0, Total=13340 [2018-10-10 15:29:36,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2018-10-10 15:29:36,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 453. [2018-10-10 15:29:36,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2018-10-10 15:29:36,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 455 transitions. [2018-10-10 15:29:36,300 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 455 transitions. Word has length 409 [2018-10-10 15:29:36,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:29:36,300 INFO L481 AbstractCegarLoop]: Abstraction has 453 states and 455 transitions. [2018-10-10 15:29:36,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-10 15:29:36,301 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 455 transitions. [2018-10-10 15:29:36,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2018-10-10 15:29:36,303 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:29:36,303 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 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] [2018-10-10 15:29:36,303 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:29:36,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:29:36,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1239223142, now seen corresponding path program 16 times [2018-10-10 15:29:36,305 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:29:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:29:37,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3216 backedges. 749 proven. 2467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:29:37,164 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:29:37,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-10-10 15:29:37,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-10 15:29:37,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-10 15:29:37,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1407, Unknown=0, NotChecked=0, Total=1640 [2018-10-10 15:29:37,166 INFO L87 Difference]: Start difference. First operand 453 states and 455 transitions. Second operand 41 states. [2018-10-10 15:29:38,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:29:38,676 INFO L93 Difference]: Finished difference Result 735 states and 738 transitions. [2018-10-10 15:29:38,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-10 15:29:38,676 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 432 [2018-10-10 15:29:38,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:29:38,679 INFO L225 Difference]: With dead ends: 735 [2018-10-10 15:29:38,679 INFO L226 Difference]: Without dead ends: 545 [2018-10-10 15:29:38,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2041 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1342, Invalid=6140, Unknown=0, NotChecked=0, Total=7482 [2018-10-10 15:29:38,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2018-10-10 15:29:38,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 499. [2018-10-10 15:29:38,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 499 states. [2018-10-10 15:29:38,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 502 transitions. [2018-10-10 15:29:38,689 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 502 transitions. Word has length 432 [2018-10-10 15:29:38,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:29:38,689 INFO L481 AbstractCegarLoop]: Abstraction has 499 states and 502 transitions. [2018-10-10 15:29:38,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-10 15:29:38,690 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 502 transitions. [2018-10-10 15:29:38,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2018-10-10 15:29:38,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:29:38,694 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 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] [2018-10-10 15:29:38,694 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:29:38,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:29:38,694 INFO L82 PathProgramCache]: Analyzing trace with hash -696867891, now seen corresponding path program 17 times [2018-10-10 15:29:38,695 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:29:38,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:29:41,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 846 proven. 2766 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:29:41,200 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:29:41,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-10-10 15:29:41,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-10 15:29:41,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-10 15:29:41,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2267, Unknown=0, NotChecked=0, Total=2450 [2018-10-10 15:29:41,202 INFO L87 Difference]: Start difference. First operand 499 states and 502 transitions. Second operand 50 states. [2018-10-10 15:29:48,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:29:48,437 INFO L93 Difference]: Finished difference Result 501 states and 503 transitions. [2018-10-10 15:29:48,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-10 15:29:48,438 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 455 [2018-10-10 15:29:48,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:29:48,441 INFO L225 Difference]: With dead ends: 501 [2018-10-10 15:29:48,441 INFO L226 Difference]: Without dead ends: 501 [2018-10-10 15:29:48,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3600 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1927, Invalid=11645, Unknown=0, NotChecked=0, Total=13572 [2018-10-10 15:29:48,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2018-10-10 15:29:48,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 499. [2018-10-10 15:29:48,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 499 states. [2018-10-10 15:29:48,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 501 transitions. [2018-10-10 15:29:48,449 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 501 transitions. Word has length 455 [2018-10-10 15:29:48,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:29:48,450 INFO L481 AbstractCegarLoop]: Abstraction has 499 states and 501 transitions. [2018-10-10 15:29:48,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-10 15:29:48,450 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 501 transitions. [2018-10-10 15:29:48,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2018-10-10 15:29:48,452 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:29:48,453 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 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] [2018-10-10 15:29:48,453 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:29:48,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:29:48,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1901590944, now seen corresponding path program 18 times [2018-10-10 15:29:48,454 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:29:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:29:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4031 backedges. 940 proven. 3091 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:29:50,651 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:29:50,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-10-10 15:29:50,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-10 15:29:50,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-10 15:29:50,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1703, Unknown=0, NotChecked=0, Total=1980 [2018-10-10 15:29:50,652 INFO L87 Difference]: Start difference. First operand 499 states and 501 transitions. Second operand 45 states. [2018-10-10 15:29:52,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:29:52,369 INFO L93 Difference]: Finished difference Result 804 states and 807 transitions. [2018-10-10 15:29:52,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-10 15:29:52,369 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 478 [2018-10-10 15:29:52,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:29:52,371 INFO L225 Difference]: With dead ends: 804 [2018-10-10 15:29:52,371 INFO L226 Difference]: Without dead ends: 591 [2018-10-10 15:29:52,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2528 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1619, Invalid=7501, Unknown=0, NotChecked=0, Total=9120 [2018-10-10 15:29:52,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2018-10-10 15:29:52,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 545. [2018-10-10 15:29:52,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2018-10-10 15:29:52,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 548 transitions. [2018-10-10 15:29:52,379 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 548 transitions. Word has length 478 [2018-10-10 15:29:52,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:29:52,379 INFO L481 AbstractCegarLoop]: Abstraction has 545 states and 548 transitions. [2018-10-10 15:29:52,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-10 15:29:52,379 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 548 transitions. [2018-10-10 15:29:52,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2018-10-10 15:29:52,382 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:29:52,383 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 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] [2018-10-10 15:29:52,383 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:29:52,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:29:52,383 INFO L82 PathProgramCache]: Analyzing trace with hash -46721965, now seen corresponding path program 19 times [2018-10-10 15:29:52,384 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:29:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:29:55,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4473 backedges. 868 proven. 3605 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:29:55,285 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:29:55,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-10-10 15:29:55,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-10 15:29:55,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-10 15:29:55,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=2815, Unknown=0, NotChecked=0, Total=3080 [2018-10-10 15:29:55,287 INFO L87 Difference]: Start difference. First operand 545 states and 548 transitions. Second operand 56 states. [2018-10-10 15:30:02,934 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2018-10-10 15:30:03,105 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:30:03,576 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:30:03,735 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:30:04,195 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:30:04,351 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:30:04,839 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:30:05,011 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:30:05,515 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:30:05,717 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:30:06,245 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:30:06,426 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:30:06,937 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:30:07,118 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2018-10-10 15:30:07,632 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-10 15:30:08,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:30:08,107 INFO L93 Difference]: Finished difference Result 547 states and 549 transitions. [2018-10-10 15:30:08,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-10 15:30:08,110 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 501 [2018-10-10 15:30:08,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:30:08,114 INFO L225 Difference]: With dead ends: 547 [2018-10-10 15:30:08,114 INFO L226 Difference]: Without dead ends: 547 [2018-10-10 15:30:08,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4880 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=3085, Invalid=15821, Unknown=0, NotChecked=0, Total=18906 [2018-10-10 15:30:08,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2018-10-10 15:30:08,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 545. [2018-10-10 15:30:08,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2018-10-10 15:30:08,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 547 transitions. [2018-10-10 15:30:08,122 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 547 transitions. Word has length 501 [2018-10-10 15:30:08,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:30:08,122 INFO L481 AbstractCegarLoop]: Abstraction has 545 states and 547 transitions. [2018-10-10 15:30:08,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-10 15:30:08,122 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 547 transitions. [2018-10-10 15:30:08,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2018-10-10 15:30:08,125 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:30:08,126 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 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] [2018-10-10 15:30:08,126 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:30:08,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:30:08,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1731878682, now seen corresponding path program 20 times [2018-10-10 15:30:08,127 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:30:08,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:30:09,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4938 backedges. 1154 proven. 3784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:30:09,190 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:30:09,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-10-10 15:30:09,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-10 15:30:09,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-10 15:30:09,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=2027, Unknown=0, NotChecked=0, Total=2352 [2018-10-10 15:30:09,191 INFO L87 Difference]: Start difference. First operand 545 states and 547 transitions. Second operand 49 states. [2018-10-10 15:30:11,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:30:11,390 INFO L93 Difference]: Finished difference Result 873 states and 876 transitions. [2018-10-10 15:30:11,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-10 15:30:11,390 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 524 [2018-10-10 15:30:11,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:30:11,393 INFO L225 Difference]: With dead ends: 873 [2018-10-10 15:30:11,393 INFO L226 Difference]: Without dead ends: 637 [2018-10-10 15:30:11,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3067 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1922, Invalid=8998, Unknown=0, NotChecked=0, Total=10920 [2018-10-10 15:30:11,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2018-10-10 15:30:11,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 591. [2018-10-10 15:30:11,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2018-10-10 15:30:11,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 594 transitions. [2018-10-10 15:30:11,402 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 594 transitions. Word has length 524 [2018-10-10 15:30:11,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:30:11,402 INFO L481 AbstractCegarLoop]: Abstraction has 591 states and 594 transitions. [2018-10-10 15:30:11,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-10 15:30:11,402 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 594 transitions. [2018-10-10 15:30:11,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2018-10-10 15:30:11,406 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:30:11,406 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 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] [2018-10-10 15:30:11,407 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:30:11,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:30:11,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1785527245, now seen corresponding path program 21 times [2018-10-10 15:30:11,408 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:30:11,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:30:14,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5426 backedges. 1077 proven. 4349 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:30:14,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:30:14,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-10-10 15:30:14,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-10 15:30:14,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-10 15:30:14,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=3248, Unknown=0, NotChecked=0, Total=3540 [2018-10-10 15:30:14,120 INFO L87 Difference]: Start difference. First operand 591 states and 594 transitions. Second operand 60 states. [2018-10-10 15:30:22,639 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2018-10-10 15:30:22,796 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2018-10-10 15:30:23,474 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2018-10-10 15:30:23,641 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-10 15:30:23,914 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2018-10-10 15:30:24,103 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-10 15:30:24,268 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-10 15:30:24,743 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-10 15:30:24,915 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-10 15:30:25,406 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-10 15:30:25,587 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-10 15:30:26,136 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-10 15:30:26,378 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-10 15:30:26,894 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-10 15:30:27,093 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2018-10-10 15:30:27,606 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2018-10-10 15:30:27,782 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2018-10-10 15:30:28,139 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-10 15:30:28,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:30:28,604 INFO L93 Difference]: Finished difference Result 593 states and 595 transitions. [2018-10-10 15:30:28,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-10 15:30:28,604 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 547 [2018-10-10 15:30:28,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:30:28,607 INFO L225 Difference]: With dead ends: 593 [2018-10-10 15:30:28,607 INFO L226 Difference]: Without dead ends: 593 [2018-10-10 15:30:28,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5702 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=3392, Invalid=18364, Unknown=0, NotChecked=0, Total=21756 [2018-10-10 15:30:28,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2018-10-10 15:30:28,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 591. [2018-10-10 15:30:28,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2018-10-10 15:30:28,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 593 transitions. [2018-10-10 15:30:28,614 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 593 transitions. Word has length 547 [2018-10-10 15:30:28,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:30:28,615 INFO L481 AbstractCegarLoop]: Abstraction has 591 states and 593 transitions. [2018-10-10 15:30:28,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-10 15:30:28,615 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 593 transitions. [2018-10-10 15:30:28,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2018-10-10 15:30:28,618 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:30:28,619 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 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] [2018-10-10 15:30:28,619 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:30:28,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:30:28,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1863233120, now seen corresponding path program 22 times [2018-10-10 15:30:28,620 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:30:28,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:30:29,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5937 backedges. 1391 proven. 4546 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:30:29,916 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:30:29,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-10-10 15:30:29,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-10 15:30:29,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-10 15:30:29,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=2379, Unknown=0, NotChecked=0, Total=2756 [2018-10-10 15:30:29,917 INFO L87 Difference]: Start difference. First operand 591 states and 593 transitions. Second operand 53 states. [2018-10-10 15:30:32,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:30:32,098 INFO L93 Difference]: Finished difference Result 942 states and 945 transitions. [2018-10-10 15:30:32,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-10 15:30:32,098 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 570 [2018-10-10 15:30:32,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:30:32,101 INFO L225 Difference]: With dead ends: 942 [2018-10-10 15:30:32,101 INFO L226 Difference]: Without dead ends: 683 [2018-10-10 15:30:32,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3658 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2251, Invalid=10631, Unknown=0, NotChecked=0, Total=12882 [2018-10-10 15:30:32,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2018-10-10 15:30:32,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 637. [2018-10-10 15:30:32,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 637 states. [2018-10-10 15:30:32,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 640 transitions. [2018-10-10 15:30:32,109 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 640 transitions. Word has length 570 [2018-10-10 15:30:32,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:30:32,109 INFO L481 AbstractCegarLoop]: Abstraction has 637 states and 640 transitions. [2018-10-10 15:30:32,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-10 15:30:32,110 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 640 transitions. [2018-10-10 15:30:32,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2018-10-10 15:30:32,113 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:30:32,114 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 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] [2018-10-10 15:30:32,114 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:30:32,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:30:32,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1048119763, now seen corresponding path program 23 times [2018-10-10 15:30:32,115 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:30:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:30:35,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6471 backedges. 1309 proven. 5162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:30:35,124 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:30:35,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-10-10 15:30:35,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-10 15:30:35,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-10 15:30:35,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=3675, Unknown=0, NotChecked=0, Total=4032 [2018-10-10 15:30:35,126 INFO L87 Difference]: Start difference. First operand 637 states and 640 transitions. Second operand 64 states. [2018-10-10 15:30:42,561 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2018-10-10 15:30:42,708 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:30:43,145 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:30:43,290 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:30:43,744 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:30:43,901 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:30:44,366 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:30:44,525 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:30:44,820 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2018-10-10 15:30:45,008 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:30:45,672 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:30:46,155 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:30:46,327 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:30:46,499 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-10-10 15:30:46,690 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2018-10-10 15:30:46,932 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:30:47,112 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:30:47,625 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:30:47,810 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:30:48,333 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:30:48,517 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2018-10-10 15:30:49,044 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-10 15:30:49,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:30:49,520 INFO L93 Difference]: Finished difference Result 639 states and 641 transitions. [2018-10-10 15:30:49,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-10 15:30:49,521 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 593 [2018-10-10 15:30:49,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:30:49,524 INFO L225 Difference]: With dead ends: 639 [2018-10-10 15:30:49,524 INFO L226 Difference]: Without dead ends: 639 [2018-10-10 15:30:49,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6817 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=4030, Invalid=21410, Unknown=0, NotChecked=0, Total=25440 [2018-10-10 15:30:49,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2018-10-10 15:30:49,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 637. [2018-10-10 15:30:49,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 637 states. [2018-10-10 15:30:49,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 639 transitions. [2018-10-10 15:30:49,532 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 639 transitions. Word has length 593 [2018-10-10 15:30:49,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:30:49,532 INFO L481 AbstractCegarLoop]: Abstraction has 637 states and 639 transitions. [2018-10-10 15:30:49,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-10 15:30:49,532 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 639 transitions. [2018-10-10 15:30:49,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2018-10-10 15:30:49,536 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:30:49,537 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 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] [2018-10-10 15:30:49,537 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:30:49,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:30:49,537 INFO L82 PathProgramCache]: Analyzing trace with hash -883148390, now seen corresponding path program 24 times [2018-10-10 15:30:49,538 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:30:49,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:30:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7028 backedges. 1651 proven. 5377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:30:51,060 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:30:51,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-10-10 15:30:51,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-10 15:30:51,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-10 15:30:51,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=2759, Unknown=0, NotChecked=0, Total=3192 [2018-10-10 15:30:51,062 INFO L87 Difference]: Start difference. First operand 637 states and 639 transitions. Second operand 57 states. [2018-10-10 15:30:53,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:30:53,862 INFO L93 Difference]: Finished difference Result 1011 states and 1014 transitions. [2018-10-10 15:30:53,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-10 15:30:53,863 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 616 [2018-10-10 15:30:53,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:30:53,865 INFO L225 Difference]: With dead ends: 1011 [2018-10-10 15:30:53,865 INFO L226 Difference]: Without dead ends: 729 [2018-10-10 15:30:53,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4301 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2606, Invalid=12400, Unknown=0, NotChecked=0, Total=15006 [2018-10-10 15:30:53,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2018-10-10 15:30:53,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 683. [2018-10-10 15:30:53,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 683 states. [2018-10-10 15:30:53,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 686 transitions. [2018-10-10 15:30:53,874 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 686 transitions. Word has length 616 [2018-10-10 15:30:53,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:30:53,874 INFO L481 AbstractCegarLoop]: Abstraction has 683 states and 686 transitions. [2018-10-10 15:30:53,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-10 15:30:53,874 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 686 transitions. [2018-10-10 15:30:53,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2018-10-10 15:30:53,878 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:30:53,879 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 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] [2018-10-10 15:30:53,879 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:30:53,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:30:53,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1656652749, now seen corresponding path program 25 times [2018-10-10 15:30:53,880 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:30:53,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:30:57,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7608 backedges. 1564 proven. 6044 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:30:57,428 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:30:57,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-10-10 15:30:57,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-10 15:30:57,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-10 15:30:57,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=4204, Unknown=0, NotChecked=0, Total=4556 [2018-10-10 15:30:57,429 INFO L87 Difference]: Start difference. First operand 683 states and 686 transitions. Second operand 68 states. [2018-10-10 15:31:07,042 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2018-10-10 15:31:08,072 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2018-10-10 15:31:08,228 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2018-10-10 15:31:09,018 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2018-10-10 15:31:09,207 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 62 [2018-10-10 15:31:09,542 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2018-10-10 15:31:09,950 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 61 [2018-10-10 15:31:10,148 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-10 15:31:10,294 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:31:10,451 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-10 15:31:10,667 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-10 15:31:10,878 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-10 15:31:11,050 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:31:11,212 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-10 15:31:11,441 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-10 15:31:11,642 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-10 15:31:11,802 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:31:11,964 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-10 15:31:12,233 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-10 15:31:12,474 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2018-10-10 15:31:12,690 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-10 15:31:12,860 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2018-10-10 15:31:13,096 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2018-10-10 15:31:13,298 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2018-10-10 15:31:13,691 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2018-10-10 15:31:13,881 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2018-10-10 15:31:14,260 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2018-10-10 15:31:14,443 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2018-10-10 15:31:14,812 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2018-10-10 15:31:15,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:31:15,299 INFO L93 Difference]: Finished difference Result 685 states and 687 transitions. [2018-10-10 15:31:15,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-10 15:31:15,300 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 639 [2018-10-10 15:31:15,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:31:15,302 INFO L225 Difference]: With dead ends: 685 [2018-10-10 15:31:15,302 INFO L226 Difference]: Without dead ends: 685 [2018-10-10 15:31:15,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7523 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=4045, Invalid=24011, Unknown=0, NotChecked=0, Total=28056 [2018-10-10 15:31:15,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2018-10-10 15:31:15,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 683. [2018-10-10 15:31:15,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 683 states. [2018-10-10 15:31:15,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 685 transitions. [2018-10-10 15:31:15,311 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 685 transitions. Word has length 639 [2018-10-10 15:31:15,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:31:15,311 INFO L481 AbstractCegarLoop]: Abstraction has 683 states and 685 transitions. [2018-10-10 15:31:15,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-10 15:31:15,311 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 685 transitions. [2018-10-10 15:31:15,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2018-10-10 15:31:15,316 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:31:15,316 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 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] [2018-10-10 15:31:15,316 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:31:15,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:31:15,317 INFO L82 PathProgramCache]: Analyzing trace with hash 2139367008, now seen corresponding path program 26 times [2018-10-10 15:31:15,317 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:31:15,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:31:16,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8211 backedges. 1934 proven. 6277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:31:16,861 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:31:16,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-10-10 15:31:16,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-10 15:31:16,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-10 15:31:16,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=3167, Unknown=0, NotChecked=0, Total=3660 [2018-10-10 15:31:16,862 INFO L87 Difference]: Start difference. First operand 683 states and 685 transitions. Second operand 61 states. [2018-10-10 15:31:19,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:31:19,952 INFO L93 Difference]: Finished difference Result 1080 states and 1083 transitions. [2018-10-10 15:31:19,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-10 15:31:19,953 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 662 [2018-10-10 15:31:19,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:31:19,956 INFO L225 Difference]: With dead ends: 1080 [2018-10-10 15:31:19,956 INFO L226 Difference]: Without dead ends: 775 [2018-10-10 15:31:19,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4996 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2987, Invalid=14305, Unknown=0, NotChecked=0, Total=17292 [2018-10-10 15:31:19,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2018-10-10 15:31:19,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 729. [2018-10-10 15:31:19,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 729 states. [2018-10-10 15:31:19,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 732 transitions. [2018-10-10 15:31:19,965 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 732 transitions. Word has length 662 [2018-10-10 15:31:19,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:31:19,965 INFO L481 AbstractCegarLoop]: Abstraction has 729 states and 732 transitions. [2018-10-10 15:31:19,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-10 15:31:19,965 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 732 transitions. [2018-10-10 15:31:19,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2018-10-10 15:31:19,970 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:31:19,971 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 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] [2018-10-10 15:31:19,971 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:31:19,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:31:19,971 INFO L82 PathProgramCache]: Analyzing trace with hash 835358547, now seen corresponding path program 27 times [2018-10-10 15:31:19,972 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:31:20,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:31:24,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8837 backedges. 1842 proven. 6995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:31:24,923 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:31:24,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-10-10 15:31:24,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-10 15:31:24,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-10 15:31:24,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=4647, Unknown=0, NotChecked=0, Total=5112 [2018-10-10 15:31:24,924 INFO L87 Difference]: Start difference. First operand 729 states and 732 transitions. Second operand 72 states. [2018-10-10 15:31:36,152 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2018-10-10 15:31:36,306 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:31:36,740 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:31:36,882 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:31:37,339 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:31:37,495 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:31:37,843 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2018-10-10 15:31:38,082 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:31:38,240 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:31:38,717 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:31:38,881 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:31:39,389 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:31:39,560 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:31:40,083 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:31:40,261 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:31:40,780 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:31:40,961 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:31:41,512 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:31:41,705 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:31:42,244 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:31:42,443 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:31:43,053 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:31:43,277 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2018-10-10 15:31:43,842 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-10 15:31:44,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:31:44,378 INFO L93 Difference]: Finished difference Result 731 states and 733 transitions. [2018-10-10 15:31:44,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-10-10 15:31:44,379 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 685 [2018-10-10 15:31:44,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:31:44,382 INFO L225 Difference]: With dead ends: 731 [2018-10-10 15:31:44,382 INFO L226 Difference]: Without dead ends: 731 [2018-10-10 15:31:44,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9078 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=5099, Invalid=27843, Unknown=0, NotChecked=0, Total=32942 [2018-10-10 15:31:44,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2018-10-10 15:31:44,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 729. [2018-10-10 15:31:44,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 729 states. [2018-10-10 15:31:44,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 731 transitions. [2018-10-10 15:31:44,390 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 731 transitions. Word has length 685 [2018-10-10 15:31:44,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:31:44,391 INFO L481 AbstractCegarLoop]: Abstraction has 729 states and 731 transitions. [2018-10-10 15:31:44,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-10 15:31:44,391 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 731 transitions. [2018-10-10 15:31:44,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2018-10-10 15:31:44,397 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:31:44,397 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 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] [2018-10-10 15:31:44,398 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:31:44,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:31:44,398 INFO L82 PathProgramCache]: Analyzing trace with hash 2095875098, now seen corresponding path program 28 times [2018-10-10 15:31:44,399 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:31:44,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:31:46,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9486 backedges. 2240 proven. 7246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:31:46,481 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:31:46,481 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-10-10 15:31:46,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-10 15:31:46,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-10 15:31:46,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=557, Invalid=3603, Unknown=0, NotChecked=0, Total=4160 [2018-10-10 15:31:46,483 INFO L87 Difference]: Start difference. First operand 729 states and 731 transitions. Second operand 65 states. [2018-10-10 15:31:50,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:31:50,038 INFO L93 Difference]: Finished difference Result 1149 states and 1152 transitions. [2018-10-10 15:31:50,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-10 15:31:50,039 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 708 [2018-10-10 15:31:50,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:31:50,042 INFO L225 Difference]: With dead ends: 1149 [2018-10-10 15:31:50,042 INFO L226 Difference]: Without dead ends: 821 [2018-10-10 15:31:50,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5743 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3394, Invalid=16346, Unknown=0, NotChecked=0, Total=19740 [2018-10-10 15:31:50,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2018-10-10 15:31:50,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 775. [2018-10-10 15:31:50,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2018-10-10 15:31:50,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 778 transitions. [2018-10-10 15:31:50,049 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 778 transitions. Word has length 708 [2018-10-10 15:31:50,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:31:50,049 INFO L481 AbstractCegarLoop]: Abstraction has 775 states and 778 transitions. [2018-10-10 15:31:50,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-10 15:31:50,049 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 778 transitions. [2018-10-10 15:31:50,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2018-10-10 15:31:50,054 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:31:50,055 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 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] [2018-10-10 15:31:50,055 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:31:50,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:31:50,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1194277837, now seen corresponding path program 29 times [2018-10-10 15:31:50,056 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:31:50,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:31:54,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10158 backedges. 2143 proven. 8015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:31:54,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:31:54,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-10-10 15:31:54,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-10 15:31:54,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-10 15:31:54,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=5200, Unknown=0, NotChecked=0, Total=5700 [2018-10-10 15:31:54,995 INFO L87 Difference]: Start difference. First operand 775 states and 778 transitions. Second operand 76 states. [2018-10-10 15:32:07,164 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2018-10-10 15:32:07,317 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2018-10-10 15:32:08,022 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2018-10-10 15:32:08,191 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-10 15:32:08,505 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2018-10-10 15:32:08,745 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-10 15:32:08,927 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-10 15:32:09,408 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-10 15:32:09,593 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-10 15:32:09,891 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2018-10-10 15:32:10,091 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-10 15:32:10,268 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-10 15:32:10,784 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-10 15:32:10,970 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-10 15:32:11,279 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2018-10-10 15:32:11,493 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-10 15:32:11,678 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-10 15:32:12,225 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-10 15:32:12,422 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-10 15:32:12,977 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-10 15:32:13,182 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-10 15:32:13,550 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2018-10-10 15:32:13,832 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-10 15:32:14,058 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-10 15:32:14,649 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-10 15:32:14,861 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2018-10-10 15:32:15,441 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2018-10-10 15:32:15,648 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2018-10-10 15:32:16,050 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-10 15:32:16,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:32:16,602 INFO L93 Difference]: Finished difference Result 777 states and 779 transitions. [2018-10-10 15:32:16,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-10-10 15:32:16,602 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 731 [2018-10-10 15:32:16,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:32:16,605 INFO L225 Difference]: With dead ends: 777 [2018-10-10 15:32:16,605 INFO L226 Difference]: Without dead ends: 777 [2018-10-10 15:32:16,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10188 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=5482, Invalid=31190, Unknown=0, NotChecked=0, Total=36672 [2018-10-10 15:32:16,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2018-10-10 15:32:16,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 775. [2018-10-10 15:32:16,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2018-10-10 15:32:16,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 777 transitions. [2018-10-10 15:32:16,612 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 777 transitions. Word has length 731 [2018-10-10 15:32:16,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:32:16,612 INFO L481 AbstractCegarLoop]: Abstraction has 775 states and 777 transitions. [2018-10-10 15:32:16,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-10 15:32:16,612 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 777 transitions. [2018-10-10 15:32:16,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 755 [2018-10-10 15:32:16,617 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:32:16,618 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 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] [2018-10-10 15:32:16,618 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:32:16,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:32:16,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1144754592, now seen corresponding path program 30 times [2018-10-10 15:32:16,619 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:32:16,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:32:18,517 INFO L134 CoverageAnalysis]: Checked inductivity of 10853 backedges. 2569 proven. 8284 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:32:18,517 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:32:18,517 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-10-10 15:32:18,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-10 15:32:18,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-10 15:32:18,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=625, Invalid=4067, Unknown=0, NotChecked=0, Total=4692 [2018-10-10 15:32:18,519 INFO L87 Difference]: Start difference. First operand 775 states and 777 transitions. Second operand 69 states. [2018-10-10 15:32:21,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:32:21,807 INFO L93 Difference]: Finished difference Result 1218 states and 1221 transitions. [2018-10-10 15:32:21,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-10 15:32:21,807 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 754 [2018-10-10 15:32:21,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:32:21,810 INFO L225 Difference]: With dead ends: 1218 [2018-10-10 15:32:21,810 INFO L226 Difference]: Without dead ends: 867 [2018-10-10 15:32:21,812 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6542 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3827, Invalid=18523, Unknown=0, NotChecked=0, Total=22350 [2018-10-10 15:32:21,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2018-10-10 15:32:21,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 821. [2018-10-10 15:32:21,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 821 states. [2018-10-10 15:32:21,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 824 transitions. [2018-10-10 15:32:21,819 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 824 transitions. Word has length 754 [2018-10-10 15:32:21,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:32:21,820 INFO L481 AbstractCegarLoop]: Abstraction has 821 states and 824 transitions. [2018-10-10 15:32:21,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-10 15:32:21,820 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 824 transitions. [2018-10-10 15:32:21,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 778 [2018-10-10 15:32:21,825 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:32:21,826 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 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] [2018-10-10 15:32:21,826 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:32:21,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:32:21,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1481090259, now seen corresponding path program 31 times [2018-10-10 15:32:21,827 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:32:21,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:32:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11571 backedges. 2467 proven. 9104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:32:26,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:32:26,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-10 15:32:26,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-10 15:32:26,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-10 15:32:26,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=589, Invalid=5731, Unknown=0, NotChecked=0, Total=6320 [2018-10-10 15:32:26,869 INFO L87 Difference]: Start difference. First operand 821 states and 824 transitions. Second operand 80 states. [2018-10-10 15:32:36,986 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2018-10-10 15:32:37,135 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:32:37,575 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:32:37,762 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:32:38,221 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:32:38,376 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:32:38,847 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:32:39,001 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:32:39,192 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-10-10 15:32:39,412 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2018-10-10 15:32:39,604 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:32:39,773 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:32:40,266 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:32:40,439 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:32:40,941 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:32:41,118 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:32:41,631 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:32:41,812 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:32:42,348 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:32:42,542 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:32:43,087 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:32:43,281 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:32:43,852 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:32:44,055 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:32:44,264 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-10-10 15:32:44,488 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2018-10-10 15:32:44,751 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:32:44,952 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:32:45,528 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:32:45,735 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2018-10-10 15:32:46,321 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-10 15:32:46,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:32:46,878 INFO L93 Difference]: Finished difference Result 823 states and 825 transitions. [2018-10-10 15:32:46,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-10 15:32:46,879 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 777 [2018-10-10 15:32:46,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:32:46,881 INFO L225 Difference]: With dead ends: 823 [2018-10-10 15:32:46,881 INFO L226 Difference]: Without dead ends: 823 [2018-10-10 15:32:46,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11663 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=6292, Invalid=35120, Unknown=0, NotChecked=0, Total=41412 [2018-10-10 15:32:46,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2018-10-10 15:32:46,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 821. [2018-10-10 15:32:46,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 821 states. [2018-10-10 15:32:46,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 823 transitions. [2018-10-10 15:32:46,889 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 823 transitions. Word has length 777 [2018-10-10 15:32:46,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:32:46,889 INFO L481 AbstractCegarLoop]: Abstraction has 821 states and 823 transitions. [2018-10-10 15:32:46,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-10 15:32:46,889 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 823 transitions. [2018-10-10 15:32:46,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 801 [2018-10-10 15:32:46,893 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:32:46,894 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 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] [2018-10-10 15:32:46,894 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:32:46,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:32:46,894 INFO L82 PathProgramCache]: Analyzing trace with hash 2068790938, now seen corresponding path program 32 times [2018-10-10 15:32:46,895 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:32:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:32:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12312 backedges. 2921 proven. 9391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:32:49,204 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:32:49,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-10-10 15:32:49,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-10 15:32:49,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-10 15:32:49,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=697, Invalid=4559, Unknown=0, NotChecked=0, Total=5256 [2018-10-10 15:32:49,206 INFO L87 Difference]: Start difference. First operand 821 states and 823 transitions. Second operand 73 states. [2018-10-10 15:32:52,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:32:52,919 INFO L93 Difference]: Finished difference Result 1287 states and 1290 transitions. [2018-10-10 15:32:52,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-10 15:32:52,919 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 800 [2018-10-10 15:32:52,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:32:52,922 INFO L225 Difference]: With dead ends: 1287 [2018-10-10 15:32:52,922 INFO L226 Difference]: Without dead ends: 913 [2018-10-10 15:32:52,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7393 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4286, Invalid=20836, Unknown=0, NotChecked=0, Total=25122 [2018-10-10 15:32:52,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2018-10-10 15:32:52,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 867. [2018-10-10 15:32:52,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 867 states. [2018-10-10 15:32:52,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 870 transitions. [2018-10-10 15:32:52,930 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 870 transitions. Word has length 800 [2018-10-10 15:32:52,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:32:52,930 INFO L481 AbstractCegarLoop]: Abstraction has 867 states and 870 transitions. [2018-10-10 15:32:52,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-10 15:32:52,931 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 870 transitions. [2018-10-10 15:32:52,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 824 [2018-10-10 15:32:52,935 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:32:52,936 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 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] [2018-10-10 15:32:52,936 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:32:52,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:32:52,936 INFO L82 PathProgramCache]: Analyzing trace with hash 881009613, now seen corresponding path program 33 times [2018-10-10 15:32:52,937 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:32:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:32:58,947 INFO L134 CoverageAnalysis]: Checked inductivity of 13076 backedges. 3162 proven. 9914 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:32:58,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:32:58,947 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2018-10-10 15:32:58,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-10 15:32:58,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-10 15:32:58,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=6187, Unknown=0, NotChecked=0, Total=6642 [2018-10-10 15:32:58,948 INFO L87 Difference]: Start difference. First operand 867 states and 870 transitions. Second operand 82 states. [2018-10-10 15:33:16,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:33:16,004 INFO L93 Difference]: Finished difference Result 869 states and 871 transitions. [2018-10-10 15:33:16,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-10-10 15:33:16,004 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 823 [2018-10-10 15:33:16,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:33:16,009 INFO L225 Difference]: With dead ends: 869 [2018-10-10 15:33:16,009 INFO L226 Difference]: Without dead ends: 869 [2018-10-10 15:33:16,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11688 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=4383, Invalid=34229, Unknown=0, NotChecked=0, Total=38612 [2018-10-10 15:33:16,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2018-10-10 15:33:16,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 867. [2018-10-10 15:33:16,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 867 states. [2018-10-10 15:33:16,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 869 transitions. [2018-10-10 15:33:16,016 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 869 transitions. Word has length 823 [2018-10-10 15:33:16,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:33:16,016 INFO L481 AbstractCegarLoop]: Abstraction has 867 states and 869 transitions. [2018-10-10 15:33:16,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-10 15:33:16,017 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 869 transitions. [2018-10-10 15:33:16,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 847 [2018-10-10 15:33:16,021 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:33:16,021 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 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] [2018-10-10 15:33:16,022 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:33:16,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:33:16,022 INFO L82 PathProgramCache]: Analyzing trace with hash -359954848, now seen corresponding path program 34 times [2018-10-10 15:33:16,022 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:33:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:33:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 13863 backedges. 3296 proven. 10567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:33:18,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:33:18,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2018-10-10 15:33:18,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-10 15:33:18,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-10 15:33:18,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=773, Invalid=5079, Unknown=0, NotChecked=0, Total=5852 [2018-10-10 15:33:18,374 INFO L87 Difference]: Start difference. First operand 867 states and 869 transitions. Second operand 77 states. [2018-10-10 15:33:23,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:33:23,032 INFO L93 Difference]: Finished difference Result 1356 states and 1359 transitions. [2018-10-10 15:33:23,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-10-10 15:33:23,032 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 846 [2018-10-10 15:33:23,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:33:23,036 INFO L225 Difference]: With dead ends: 1356 [2018-10-10 15:33:23,036 INFO L226 Difference]: Without dead ends: 959 [2018-10-10 15:33:23,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8296 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4771, Invalid=23285, Unknown=0, NotChecked=0, Total=28056 [2018-10-10 15:33:23,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2018-10-10 15:33:23,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 913. [2018-10-10 15:33:23,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 913 states. [2018-10-10 15:33:23,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 916 transitions. [2018-10-10 15:33:23,044 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 916 transitions. Word has length 846 [2018-10-10 15:33:23,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:33:23,045 INFO L481 AbstractCegarLoop]: Abstraction has 913 states and 916 transitions. [2018-10-10 15:33:23,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-10 15:33:23,045 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 916 transitions. [2018-10-10 15:33:23,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 870 [2018-10-10 15:33:23,050 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:33:23,050 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 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] [2018-10-10 15:33:23,051 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:33:23,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:33:23,051 INFO L82 PathProgramCache]: Analyzing trace with hash 772557395, now seen corresponding path program 35 times [2018-10-10 15:33:23,052 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:33:23,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:33:28,924 INFO L134 CoverageAnalysis]: Checked inductivity of 14673 backedges. 3184 proven. 11489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:33:28,924 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:33:28,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2018-10-10 15:33:28,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-10 15:33:28,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-10 15:33:28,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=729, Invalid=6927, Unknown=0, NotChecked=0, Total=7656 [2018-10-10 15:33:28,926 INFO L87 Difference]: Start difference. First operand 913 states and 916 transitions. Second operand 88 states. [2018-10-10 15:33:39,353 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2018-10-10 15:33:39,872 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2018-10-10 15:33:40,016 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:33:40,471 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:33:40,653 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:33:40,825 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-10-10 15:33:40,992 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2018-10-10 15:33:41,169 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:33:41,324 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:33:41,798 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:33:41,965 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:33:42,465 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:33:42,637 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:33:43,140 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:33:43,314 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:33:43,838 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:33:44,016 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:33:44,548 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:33:44,737 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:33:45,289 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:33:45,480 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:33:45,860 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2018-10-10 15:33:46,112 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:33:46,309 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:33:46,680 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2018-10-10 15:33:46,905 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:33:47,108 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:33:47,689 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:33:47,902 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:33:48,498 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:33:48,712 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:33:49,322 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:33:49,541 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:33:50,159 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:33:50,377 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2018-10-10 15:33:51,092 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-10 15:33:51,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:33:51,685 INFO L93 Difference]: Finished difference Result 915 states and 917 transitions. [2018-10-10 15:33:51,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-10-10 15:33:51,686 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 869 [2018-10-10 15:33:51,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:33:51,690 INFO L225 Difference]: With dead ends: 915 [2018-10-10 15:33:51,690 INFO L226 Difference]: Without dead ends: 915 [2018-10-10 15:33:51,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14572 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=7609, Invalid=43241, Unknown=0, NotChecked=0, Total=50850 [2018-10-10 15:33:51,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2018-10-10 15:33:51,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 913. [2018-10-10 15:33:51,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 913 states. [2018-10-10 15:33:51,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 915 transitions. [2018-10-10 15:33:51,698 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 915 transitions. Word has length 869 [2018-10-10 15:33:51,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:33:51,699 INFO L481 AbstractCegarLoop]: Abstraction has 913 states and 915 transitions. [2018-10-10 15:33:51,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-10 15:33:51,699 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 915 transitions. [2018-10-10 15:33:51,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 893 [2018-10-10 15:33:51,704 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:33:51,704 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 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] [2018-10-10 15:33:51,704 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:33:51,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:33:51,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1793616154, now seen corresponding path program 36 times [2018-10-10 15:33:51,705 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:33:51,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:33:54,206 INFO L134 CoverageAnalysis]: Checked inductivity of 15506 backedges. 3694 proven. 11812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:33:54,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:33:54,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2018-10-10 15:33:54,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-10 15:33:54,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-10 15:33:54,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=853, Invalid=5627, Unknown=0, NotChecked=0, Total=6480 [2018-10-10 15:33:54,208 INFO L87 Difference]: Start difference. First operand 913 states and 915 transitions. Second operand 81 states. [2018-10-10 15:33:59,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:33:59,301 INFO L93 Difference]: Finished difference Result 1425 states and 1428 transitions. [2018-10-10 15:33:59,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-10-10 15:33:59,301 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 892 [2018-10-10 15:33:59,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:33:59,305 INFO L225 Difference]: With dead ends: 1425 [2018-10-10 15:33:59,305 INFO L226 Difference]: Without dead ends: 1005 [2018-10-10 15:33:59,306 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9251 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5282, Invalid=25870, Unknown=0, NotChecked=0, Total=31152 [2018-10-10 15:33:59,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2018-10-10 15:33:59,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 959. [2018-10-10 15:33:59,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2018-10-10 15:33:59,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 962 transitions. [2018-10-10 15:33:59,313 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 962 transitions. Word has length 892 [2018-10-10 15:33:59,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:33:59,313 INFO L481 AbstractCegarLoop]: Abstraction has 959 states and 962 transitions. [2018-10-10 15:33:59,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-10 15:33:59,313 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 962 transitions. [2018-10-10 15:33:59,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2018-10-10 15:33:59,319 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:33:59,319 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 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] [2018-10-10 15:33:59,319 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:33:59,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:33:59,320 INFO L82 PathProgramCache]: Analyzing trace with hash 478034893, now seen corresponding path program 37 times [2018-10-10 15:33:59,320 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:33:59,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:34:05,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16362 backedges. 3577 proven. 12785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:34:05,761 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:34:05,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2018-10-10 15:34:05,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-10 15:34:05,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-10 15:34:05,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=772, Invalid=7600, Unknown=0, NotChecked=0, Total=8372 [2018-10-10 15:34:05,763 INFO L87 Difference]: Start difference. First operand 959 states and 962 transitions. Second operand 92 states. [2018-10-10 15:34:22,864 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2018-10-10 15:34:23,015 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2018-10-10 15:34:23,756 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2018-10-10 15:34:23,922 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-10 15:34:24,402 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-10 15:34:24,564 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-10 15:34:25,064 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-10 15:34:25,239 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-10 15:34:25,738 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-10 15:34:25,945 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-10 15:34:26,464 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-10 15:34:26,663 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-10 15:34:26,867 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:34:27,064 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2018-10-10 15:34:27,279 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-10 15:34:27,473 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-10 15:34:28,021 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-10 15:34:28,216 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-10 15:34:28,789 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-10 15:34:28,993 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-10 15:34:29,576 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-10 15:34:29,783 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-10 15:34:30,375 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-10 15:34:30,588 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-10 15:34:31,195 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-10 15:34:31,422 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-10 15:34:31,824 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2018-10-10 15:34:32,143 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-10 15:34:32,375 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-10 15:34:33,048 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-10 15:34:33,283 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2018-10-10 15:34:33,931 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-10-10 15:34:34,167 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2018-10-10 15:34:34,810 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2018-10-10 15:34:35,035 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2018-10-10 15:34:35,482 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-10 15:34:36,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:34:36,115 INFO L93 Difference]: Finished difference Result 961 states and 963 transitions. [2018-10-10 15:34:36,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-10-10 15:34:36,116 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 915 [2018-10-10 15:34:36,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:34:36,119 INFO L225 Difference]: With dead ends: 961 [2018-10-10 15:34:36,119 INFO L226 Difference]: Without dead ends: 961 [2018-10-10 15:34:36,121 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15970 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=8068, Invalid=47392, Unknown=0, NotChecked=0, Total=55460 [2018-10-10 15:34:36,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2018-10-10 15:34:36,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 959. [2018-10-10 15:34:36,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2018-10-10 15:34:36,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 961 transitions. [2018-10-10 15:34:36,128 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 961 transitions. Word has length 915 [2018-10-10 15:34:36,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:34:36,128 INFO L481 AbstractCegarLoop]: Abstraction has 959 states and 961 transitions. [2018-10-10 15:34:36,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-10 15:34:36,128 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 961 transitions. [2018-10-10 15:34:36,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 939 [2018-10-10 15:34:36,134 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:34:36,134 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 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] [2018-10-10 15:34:36,134 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:34:36,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:34:36,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1570074208, now seen corresponding path program 38 times [2018-10-10 15:34:36,135 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:34:36,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:34:39,341 INFO L134 CoverageAnalysis]: Checked inductivity of 17241 backedges. 4115 proven. 13126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:34:39,341 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:34:39,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2018-10-10 15:34:39,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-10 15:34:39,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-10 15:34:39,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=937, Invalid=6203, Unknown=0, NotChecked=0, Total=7140 [2018-10-10 15:34:39,342 INFO L87 Difference]: Start difference. First operand 959 states and 961 transitions. Second operand 85 states. [2018-10-10 15:34:44,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:34:44,920 INFO L93 Difference]: Finished difference Result 1494 states and 1497 transitions. [2018-10-10 15:34:44,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-10-10 15:34:44,920 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 938 [2018-10-10 15:34:44,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:34:44,925 INFO L225 Difference]: With dead ends: 1494 [2018-10-10 15:34:44,925 INFO L226 Difference]: Without dead ends: 1051 [2018-10-10 15:34:44,927 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10258 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5819, Invalid=28591, Unknown=0, NotChecked=0, Total=34410 [2018-10-10 15:34:44,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2018-10-10 15:34:44,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1005. [2018-10-10 15:34:44,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1005 states. [2018-10-10 15:34:44,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1008 transitions. [2018-10-10 15:34:44,935 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1008 transitions. Word has length 938 [2018-10-10 15:34:44,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:34:44,935 INFO L481 AbstractCegarLoop]: Abstraction has 1005 states and 1008 transitions. [2018-10-10 15:34:44,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-10 15:34:44,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1008 transitions. [2018-10-10 15:34:44,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 962 [2018-10-10 15:34:44,941 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:34:44,942 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 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] [2018-10-10 15:34:44,942 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:34:44,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:34:44,942 INFO L82 PathProgramCache]: Analyzing trace with hash -365658157, now seen corresponding path program 39 times [2018-10-10 15:34:44,943 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:34:45,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:34:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 18143 backedges. 3993 proven. 14150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:34:51,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:34:51,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2018-10-10 15:34:51,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-10 15:34:51,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-10 15:34:51,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=885, Invalid=8235, Unknown=0, NotChecked=0, Total=9120 [2018-10-10 15:34:51,782 INFO L87 Difference]: Start difference. First operand 1005 states and 1008 transitions. Second operand 96 states. [2018-10-10 15:35:10,150 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2018-10-10 15:35:10,301 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:35:10,753 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:35:10,902 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:35:11,366 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:35:11,515 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:35:11,988 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:35:12,148 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:35:12,322 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-10-10 15:35:12,664 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:35:12,890 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:35:13,076 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-10-10 15:35:13,442 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:35:13,616 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:35:14,128 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:35:14,312 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:35:14,835 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:35:15,018 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:35:15,571 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:35:15,764 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:35:16,318 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:35:16,519 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:35:17,094 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:35:17,298 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:35:17,909 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:35:18,213 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:35:18,827 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:35:19,046 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:35:19,692 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:35:19,910 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:35:20,534 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:35:20,760 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:35:21,409 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:35:21,638 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:35:22,289 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:35:22,525 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2018-10-10 15:35:23,263 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-10 15:35:23,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:35:23,931 INFO L93 Difference]: Finished difference Result 1007 states and 1009 transitions. [2018-10-10 15:35:23,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2018-10-10 15:35:23,931 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 961 [2018-10-10 15:35:23,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:35:23,935 INFO L225 Difference]: With dead ends: 1007 [2018-10-10 15:35:23,935 INFO L226 Difference]: Without dead ends: 1007 [2018-10-10 15:35:23,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17805 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=9050, Invalid=52206, Unknown=0, NotChecked=0, Total=61256 [2018-10-10 15:35:23,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2018-10-10 15:35:23,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 1005. [2018-10-10 15:35:23,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1005 states. [2018-10-10 15:35:23,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1007 transitions. [2018-10-10 15:35:23,944 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1007 transitions. Word has length 961 [2018-10-10 15:35:23,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:35:23,944 INFO L481 AbstractCegarLoop]: Abstraction has 1005 states and 1007 transitions. [2018-10-10 15:35:23,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-10 15:35:23,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1007 transitions. [2018-10-10 15:35:23,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 985 [2018-10-10 15:35:23,950 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:35:23,951 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 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] [2018-10-10 15:35:23,951 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:35:23,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:35:23,951 INFO L82 PathProgramCache]: Analyzing trace with hash -719584358, now seen corresponding path program 40 times [2018-10-10 15:35:23,952 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:35:23,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:35:26,956 INFO L134 CoverageAnalysis]: Checked inductivity of 19068 backedges. 4559 proven. 14509 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:35:26,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:35:26,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2018-10-10 15:35:26,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-10 15:35:26,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-10 15:35:26,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=6807, Unknown=0, NotChecked=0, Total=7832 [2018-10-10 15:35:26,958 INFO L87 Difference]: Start difference. First operand 1005 states and 1007 transitions. Second operand 89 states. [2018-10-10 15:35:32,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:35:32,152 INFO L93 Difference]: Finished difference Result 1563 states and 1566 transitions. [2018-10-10 15:35:32,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-10-10 15:35:32,152 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 984 [2018-10-10 15:35:32,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:35:32,156 INFO L225 Difference]: With dead ends: 1563 [2018-10-10 15:35:32,156 INFO L226 Difference]: Without dead ends: 1097 [2018-10-10 15:35:32,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11317 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=6382, Invalid=31448, Unknown=0, NotChecked=0, Total=37830 [2018-10-10 15:35:32,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2018-10-10 15:35:32,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1051. [2018-10-10 15:35:32,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1051 states. [2018-10-10 15:35:32,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1054 transitions. [2018-10-10 15:35:32,166 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1054 transitions. Word has length 984 [2018-10-10 15:35:32,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:35:32,167 INFO L481 AbstractCegarLoop]: Abstraction has 1051 states and 1054 transitions. [2018-10-10 15:35:32,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-10 15:35:32,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1054 transitions. [2018-10-10 15:35:32,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1008 [2018-10-10 15:35:32,173 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:35:32,173 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 43, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 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] [2018-10-10 15:35:32,173 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:35:32,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:35:32,174 INFO L82 PathProgramCache]: Analyzing trace with hash 98862029, now seen corresponding path program 41 times [2018-10-10 15:35:32,174 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:35:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:35:40,072 INFO L134 CoverageAnalysis]: Checked inductivity of 20016 backedges. 4432 proven. 15584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:35:40,073 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:35:40,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2018-10-10 15:35:40,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-10 15:35:40,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-10 15:35:40,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=864, Invalid=9036, Unknown=0, NotChecked=0, Total=9900 [2018-10-10 15:35:40,074 INFO L87 Difference]: Start difference. First operand 1051 states and 1054 transitions. Second operand 100 states. [2018-10-10 15:35:58,918 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2018-10-10 15:35:59,129 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2018-10-10 15:36:00,429 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2018-10-10 15:36:00,586 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2018-10-10 15:36:01,488 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2018-10-10 15:36:01,721 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 62 [2018-10-10 15:36:01,893 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-10 15:36:02,104 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2018-10-10 15:36:02,587 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 61 [2018-10-10 15:36:02,781 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-10 15:36:02,938 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:36:03,106 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-10 15:36:03,326 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-10 15:36:03,526 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-10 15:36:03,690 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:36:03,865 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-10 15:36:04,146 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-10 15:36:04,381 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-10 15:36:04,550 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:36:04,724 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-10 15:36:04,955 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-10 15:36:05,169 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-10 15:36:05,344 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:36:05,527 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-10 15:36:05,770 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-10 15:36:05,989 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-10 15:36:06,169 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:36:06,354 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-10 15:36:06,604 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-10 15:36:06,831 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-10 15:36:07,044 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:36:07,234 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-10 15:36:07,488 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-10 15:36:07,719 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-10 15:36:07,910 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:36:08,103 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-10 15:36:08,373 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-10 15:36:08,619 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-10 15:36:08,845 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:36:09,051 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-10 15:36:09,368 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-10 15:36:09,619 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-10 15:36:09,815 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:36:10,008 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-10 15:36:10,294 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-10 15:36:10,546 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-10 15:36:10,754 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:36:10,953 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-10 15:36:11,239 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-10 15:36:11,505 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2018-10-10 15:36:11,712 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:36:11,914 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-10-10 15:36:12,214 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2018-10-10 15:36:12,476 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2018-10-10 15:36:12,681 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-10 15:36:12,879 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2018-10-10 15:36:13,173 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2018-10-10 15:36:13,432 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2018-10-10 15:36:13,918 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2018-10-10 15:36:14,198 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2018-10-10 15:36:14,791 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2018-10-10 15:36:15,028 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2018-10-10 15:36:15,488 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2018-10-10 15:36:16,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:36:16,190 INFO L93 Difference]: Finished difference Result 1053 states and 1055 transitions. [2018-10-10 15:36:16,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2018-10-10 15:36:16,190 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 1007 [2018-10-10 15:36:16,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:36:16,195 INFO L225 Difference]: With dead ends: 1053 [2018-10-10 15:36:16,196 INFO L226 Difference]: Without dead ends: 1053 [2018-10-10 15:36:16,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18943 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=9025, Invalid=56255, Unknown=0, NotChecked=0, Total=65280 [2018-10-10 15:36:16,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2018-10-10 15:36:16,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 1051. [2018-10-10 15:36:16,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1051 states. [2018-10-10 15:36:16,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1053 transitions. [2018-10-10 15:36:16,204 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1053 transitions. Word has length 1007 [2018-10-10 15:36:16,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:36:16,204 INFO L481 AbstractCegarLoop]: Abstraction has 1051 states and 1053 transitions. [2018-10-10 15:36:16,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-10 15:36:16,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1053 transitions. [2018-10-10 15:36:16,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1031 [2018-10-10 15:36:16,211 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:36:16,211 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 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] [2018-10-10 15:36:16,211 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:36:16,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:36:16,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1315035552, now seen corresponding path program 42 times [2018-10-10 15:36:16,212 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:36:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:36:19,620 INFO L134 CoverageAnalysis]: Checked inductivity of 20987 backedges. 5026 proven. 15961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:36:19,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:36:19,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2018-10-10 15:36:19,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-10 15:36:19,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-10 15:36:19,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1117, Invalid=7439, Unknown=0, NotChecked=0, Total=8556 [2018-10-10 15:36:19,621 INFO L87 Difference]: Start difference. First operand 1051 states and 1053 transitions. Second operand 93 states. [2018-10-10 15:36:22,922 WARN L178 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2018-10-10 15:36:26,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:36:26,610 INFO L93 Difference]: Finished difference Result 1632 states and 1635 transitions. [2018-10-10 15:36:26,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-10-10 15:36:26,610 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 1030 [2018-10-10 15:36:26,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:36:26,614 INFO L225 Difference]: With dead ends: 1632 [2018-10-10 15:36:26,614 INFO L226 Difference]: Without dead ends: 1143 [2018-10-10 15:36:26,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12428 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=6971, Invalid=34441, Unknown=0, NotChecked=0, Total=41412 [2018-10-10 15:36:26,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2018-10-10 15:36:26,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 1097. [2018-10-10 15:36:26,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1097 states. [2018-10-10 15:36:26,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1100 transitions. [2018-10-10 15:36:26,625 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1100 transitions. Word has length 1030 [2018-10-10 15:36:26,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:36:26,625 INFO L481 AbstractCegarLoop]: Abstraction has 1097 states and 1100 transitions. [2018-10-10 15:36:26,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-10 15:36:26,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1100 transitions. [2018-10-10 15:36:26,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1054 [2018-10-10 15:36:26,632 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:36:26,632 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 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] [2018-10-10 15:36:26,633 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:36:26,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:36:26,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1054623059, now seen corresponding path program 43 times [2018-10-10 15:36:26,634 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:36:26,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:36:35,049 INFO L134 CoverageAnalysis]: Checked inductivity of 21981 backedges. 4894 proven. 17087 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:36:35,049 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:36:35,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2018-10-10 15:36:35,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-10 15:36:35,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-10 15:36:35,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1057, Invalid=9655, Unknown=0, NotChecked=0, Total=10712 [2018-10-10 15:36:35,051 INFO L87 Difference]: Start difference. First operand 1097 states and 1100 transitions. Second operand 104 states. [2018-10-10 15:36:56,831 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2018-10-10 15:36:56,975 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:36:57,426 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:36:57,570 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:36:58,041 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:36:58,191 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:36:58,667 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:36:58,825 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:36:59,309 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:36:59,475 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:36:59,975 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:37:00,148 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:37:00,336 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-10-10 15:37:00,552 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2018-10-10 15:37:00,772 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:37:00,952 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:37:01,491 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:37:01,679 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:37:02,235 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:37:02,425 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:37:02,996 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:37:03,193 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:37:03,787 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:37:03,995 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:37:04,377 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2018-10-10 15:37:04,633 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:37:04,910 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:37:05,602 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:37:05,826 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:37:06,444 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:37:06,663 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:37:07,296 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:37:07,528 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:37:08,178 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:37:08,412 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:37:09,076 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:37:09,323 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:37:09,999 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-10-10 15:37:10,242 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-10 15:37:10,472 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-10-10 15:37:10,713 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56