java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplTransformed.xml -s ../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf -i ../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_false-valid-free.i_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b8f97f7-m [2018-10-10 16:20:17,194 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-10 16:20:17,196 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-10 16:20:17,208 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-10 16:20:17,209 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-10 16:20:17,210 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-10 16:20:17,211 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-10 16:20:17,212 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-10 16:20:17,214 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-10 16:20:17,215 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-10 16:20:17,216 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-10 16:20:17,216 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-10 16:20:17,217 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-10 16:20:17,218 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-10 16:20:17,219 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-10 16:20:17,220 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-10 16:20:17,220 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-10 16:20:17,222 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-10 16:20:17,224 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-10 16:20:17,226 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-10 16:20:17,227 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-10 16:20:17,228 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-10 16:20:17,230 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-10 16:20:17,231 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-10 16:20:17,231 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-10 16:20:17,232 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-10 16:20:17,233 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-10 16:20:17,233 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-10 16:20:17,234 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-10 16:20:17,235 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-10 16:20:17,235 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-10 16:20:17,236 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-10 16:20:17,236 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-10 16:20:17,237 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-10 16:20:17,238 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-10 16:20:17,238 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-10 16:20:17,239 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 16:20:17,249 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-10 16:20:17,249 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-10 16:20:17,250 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-10 16:20:17,250 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-10 16:20:17,250 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-10 16:20:17,250 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-10 16:20:17,251 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-10 16:20:17,251 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-10 16:20:17,251 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-10 16:20:17,252 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-10 16:20:17,252 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-10 16:20:17,252 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-10 16:20:17,252 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-10 16:20:17,253 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-10 16:20:17,253 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-10 16:20:17,296 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-10 16:20:17,309 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-10 16:20:17,312 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-10 16:20:17,314 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-10 16:20:17,315 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-10 16:20:17,315 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_false-valid-free.i_5.bpl [2018-10-10 16:20:17,316 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_false-valid-free.i_5.bpl' [2018-10-10 16:20:17,377 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-10 16:20:17,379 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-10 16:20:17,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-10 16:20:17,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-10 16:20:17,380 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-10 16:20:17,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 04:20:17" (1/1) ... [2018-10-10 16:20:17,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 04:20:17" (1/1) ... [2018-10-10 16:20:17,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 04:20:17" (1/1) ... [2018-10-10 16:20:17,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 04:20:17" (1/1) ... [2018-10-10 16:20:17,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 04:20:17" (1/1) ... [2018-10-10 16:20:17,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 04:20:17" (1/1) ... [2018-10-10 16:20:17,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 04:20:17" (1/1) ... [2018-10-10 16:20:17,450 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-10 16:20:17,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-10 16:20:17,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-10 16:20:17,456 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-10 16:20:17,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 04:20:17" (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 16:20:17,542 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-10 16:20:17,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-10 16:20:17,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-10 16:20:18,092 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-10 16:20:18,093 INFO L202 PluginConnector]: Adding new model 960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 04:20:18 BoogieIcfgContainer [2018-10-10 16:20:18,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-10 16:20:18,094 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2018-10-10 16:20:18,094 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2018-10-10 16:20:18,096 INFO L276 PluginConnector]: IcfgTransformer initialized [2018-10-10 16:20:18,100 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 04:20:18" (1/1) ... [2018-10-10 16:20:18,109 INFO L137 apSepIcfgTransformer]: HeapSepIcfgTransformer: Starting heap partitioning [2018-10-10 16:20:18,110 INFO L138 apSepIcfgTransformer]: To be partitioned heap arrays found [#memory_int] [2018-10-10 16:20:18,149 INFO L191 apSepIcfgTransformer]: Heap separator: starting loc-array-style preprocessing [2018-10-10 16:20:18,190 INFO L217 apSepIcfgTransformer]: finished MemlocArrayUpdater [2018-10-10 16:20:18,206 INFO L280 apSepIcfgTransformer]: finished preprocessing for the equality analysis [2018-10-10 16:20:18,271 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=1) [2018-10-10 16:20:49,328 INFO L315 AbstractInterpreter]: Visited 61 different actions 87 times. Merged at 14 different actions 24 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-10-10 16:20:49,332 INFO L304 apSepIcfgTransformer]: finished equality analysis [2018-10-10 16:20:49,337 INFO L316 apSepIcfgTransformer]: Finished detection of select terms ("array reads") [2018-10-10 16:20:49,373 WARN L152 HeapPartitionManager]: No literal set constraint found for loc-array access (select |v_#locv_ULTIMATE.start_write~int_old_#memory_int_4_1_1| |v_ULTIMATE.start_write~int_#ptr.base_13|) at (assume write~int_old_#memory_int[write~int_#ptr.base := write~int_old_#memory_int[write~int_#ptr.base][write~int_#ptr.offset := write~int_#value]] == #memory_int;) [2018-10-10 16:20:49,411 INFO L232 HeapPartitionManager]: partitioning result: [2018-10-10 16:20:49,412 INFO L237 HeapPartitionManager]: location blocks for array group [#memory_int, ULTIMATE.start_write~int_old_#memory_int] [2018-10-10 16:20:49,412 INFO L246 HeapPartitionManager]: at dimension 1 [2018-10-10 16:20:49,412 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 3 [2018-10-10 16:20:49,412 INFO L248 HeapPartitionManager]: # location blocks :2 [2018-10-10 16:20:49,412 INFO L246 HeapPartitionManager]: at dimension 2 [2018-10-10 16:20:49,413 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 0 [2018-10-10 16:20:49,413 INFO L248 HeapPartitionManager]: # location blocks :0 [2018-10-10 16:20:49,413 INFO L237 HeapPartitionManager]: location blocks for array group [#memory_int, ULTIMATE.start_write~int_old_#memory_int] [2018-10-10 16:20:49,413 INFO L246 HeapPartitionManager]: at dimension 1 [2018-10-10 16:20:49,413 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 3 [2018-10-10 16:20:49,413 INFO L248 HeapPartitionManager]: # location blocks :2 [2018-10-10 16:20:49,413 INFO L246 HeapPartitionManager]: at dimension 2 [2018-10-10 16:20:49,413 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 0 [2018-10-10 16:20:49,414 INFO L248 HeapPartitionManager]: # location blocks :0 [2018-10-10 16:20:49,415 INFO L145 ransitionTransformer]: executing heap partitioning transformation [2018-10-10 16:20:49,430 INFO L202 PluginConnector]: Adding new model 960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.10 04:20:49 BasicIcfg [2018-10-10 16:20:49,430 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2018-10-10 16:20:49,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-10 16:20:49,432 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-10 16:20:49,435 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-10 16:20:49,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 04:20:17" (1/3) ... [2018-10-10 16:20:49,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@739e6a59 and model type 960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 04:20:49, skipping insertion in model container [2018-10-10 16:20:49,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 04:20:18" (2/3) ... [2018-10-10 16:20:49,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@739e6a59 and model type 960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.10 04:20:49, skipping insertion in model container [2018-10-10 16:20:49,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.10 04:20:49" (3/3) ... [2018-10-10 16:20:49,439 INFO L112 eAbstractionObserver]: Analyzing ICFG memPartitionedIcfg [2018-10-10 16:20:49,451 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-10-10 16:20:49,459 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-10 16:20:49,477 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-10 16:20:49,501 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-10 16:20:49,502 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-10 16:20:49,502 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-10 16:20:49,503 INFO L384 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-10-10 16:20:49,503 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-10 16:20:49,503 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-10 16:20:49,503 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-10 16:20:49,504 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-10 16:20:49,504 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-10 16:20:49,517 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2018-10-10 16:20:49,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-10 16:20:49,525 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:20:49,526 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:20:49,527 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:20:49,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:20:49,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1565987991, now seen corresponding path program 1 times [2018-10-10 16:20:49,588 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:20:49,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:20:50,549 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 16:20:50,552 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-10 16:20:50,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2018-10-10 16:20:50,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-10 16:20:50,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-10 16:20:50,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-10-10 16:20:50,572 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 14 states. [2018-10-10 16:20:51,222 WARN L178 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-10-10 16:20:52,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:20:52,050 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-10 16:20:52,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-10 16:20:52,051 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2018-10-10 16:20:52,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:20:52,061 INFO L225 Difference]: With dead ends: 74 [2018-10-10 16:20:52,061 INFO L226 Difference]: Without dead ends: 74 [2018-10-10 16:20:52,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2018-10-10 16:20:52,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-10 16:20:52,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2018-10-10 16:20:52,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-10 16:20:52,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-10 16:20:52,104 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 51 [2018-10-10 16:20:52,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:20:52,105 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-10 16:20:52,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-10 16:20:52,106 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-10 16:20:52,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-10 16:20:52,108 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:20:52,108 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:20:52,108 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:20:52,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:20:52,109 INFO L82 PathProgramCache]: Analyzing trace with hash -725690753, now seen corresponding path program 1 times [2018-10-10 16:20:52,110 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:20:52,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:20:52,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:20:52,647 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:20:52,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-10 16:20:52,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-10 16:20:52,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-10 16:20:52,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2018-10-10 16:20:52,650 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 17 states. [2018-10-10 16:20:54,134 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-10 16:20:54,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:20:54,281 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-10 16:20:54,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-10 16:20:54,282 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2018-10-10 16:20:54,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:20:54,284 INFO L225 Difference]: With dead ends: 86 [2018-10-10 16:20:54,285 INFO L226 Difference]: Without dead ends: 86 [2018-10-10 16:20:54,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=388, Invalid=1094, Unknown=0, NotChecked=0, Total=1482 [2018-10-10 16:20:54,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-10 16:20:54,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2018-10-10 16:20:54,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-10 16:20:54,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-10 16:20:54,302 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 63 [2018-10-10 16:20:54,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:20:54,302 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-10 16:20:54,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-10 16:20:54,303 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-10 16:20:54,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-10 16:20:54,306 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:20:54,306 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:20:54,307 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:20:54,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:20:54,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1481309287, now seen corresponding path program 2 times [2018-10-10 16:20:54,311 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:20:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:20:54,833 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:20:54,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:20:54,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-10 16:20:54,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-10 16:20:54,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-10 16:20:54,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2018-10-10 16:20:54,835 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 20 states. [2018-10-10 16:20:55,623 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2018-10-10 16:20:56,108 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-10 16:20:56,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:20:56,720 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-10 16:20:56,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-10 16:20:56,721 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2018-10-10 16:20:56,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:20:56,723 INFO L225 Difference]: With dead ends: 98 [2018-10-10 16:20:56,723 INFO L226 Difference]: Without dead ends: 98 [2018-10-10 16:20:56,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=471, Invalid=1509, Unknown=0, NotChecked=0, Total=1980 [2018-10-10 16:20:56,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-10 16:20:56,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2018-10-10 16:20:56,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-10 16:20:56,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-10 16:20:56,732 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 75 [2018-10-10 16:20:56,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:20:56,733 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-10 16:20:56,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-10 16:20:56,733 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-10 16:20:56,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-10 16:20:56,735 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:20:56,735 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:20:56,735 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:20:56,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:20:56,736 INFO L82 PathProgramCache]: Analyzing trace with hash 8750671, now seen corresponding path program 3 times [2018-10-10 16:20:56,737 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:20:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:20:57,458 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:20:57,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:20:57,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-10 16:20:57,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-10 16:20:57,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-10 16:20:57,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2018-10-10 16:20:57,460 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 22 states. [2018-10-10 16:21:00,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:21:00,023 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-10 16:21:00,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-10 16:21:00,024 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 87 [2018-10-10 16:21:00,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:21:00,026 INFO L225 Difference]: With dead ends: 110 [2018-10-10 16:21:00,026 INFO L226 Difference]: Without dead ends: 110 [2018-10-10 16:21:00,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=547, Invalid=1903, Unknown=0, NotChecked=0, Total=2450 [2018-10-10 16:21:00,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-10 16:21:00,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2018-10-10 16:21:00,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-10 16:21:00,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-10 16:21:00,036 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 87 [2018-10-10 16:21:00,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:21:00,036 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-10 16:21:00,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-10 16:21:00,037 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-10 16:21:00,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-10 16:21:00,038 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:21:00,038 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:21:00,039 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:21:00,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:21:00,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1727558711, now seen corresponding path program 4 times [2018-10-10 16:21:00,040 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:21:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:21:00,551 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:21:00,551 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:21:00,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-10 16:21:00,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-10 16:21:00,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-10 16:21:00,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2018-10-10 16:21:00,553 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 24 states. [2018-10-10 16:21:03,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:21:03,541 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-10-10 16:21:03,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-10 16:21:03,542 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 99 [2018-10-10 16:21:03,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:21:03,545 INFO L225 Difference]: With dead ends: 122 [2018-10-10 16:21:03,545 INFO L226 Difference]: Without dead ends: 122 [2018-10-10 16:21:03,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=623, Invalid=2347, Unknown=0, NotChecked=0, Total=2970 [2018-10-10 16:21:03,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-10 16:21:03,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 112. [2018-10-10 16:21:03,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-10 16:21:03,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-10 16:21:03,555 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 99 [2018-10-10 16:21:03,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:21:03,555 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-10 16:21:03,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-10 16:21:03,555 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-10 16:21:03,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-10 16:21:03,557 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:21:03,557 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:21:03,557 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:21:03,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:21:03,558 INFO L82 PathProgramCache]: Analyzing trace with hash 640534047, now seen corresponding path program 5 times [2018-10-10 16:21:03,559 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:21:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:21:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:21:04,227 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:21:04,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-10 16:21:04,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-10 16:21:04,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-10 16:21:04,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2018-10-10 16:21:04,229 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 28 states. [2018-10-10 16:21:05,870 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-10 16:21:06,017 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:21:06,410 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:21:06,548 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:21:06,925 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:21:07,321 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2018-10-10 16:21:07,495 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2018-10-10 16:21:07,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:21:07,884 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-10-10 16:21:07,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-10 16:21:07,885 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 111 [2018-10-10 16:21:07,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:21:07,886 INFO L225 Difference]: With dead ends: 134 [2018-10-10 16:21:07,887 INFO L226 Difference]: Without dead ends: 134 [2018-10-10 16:21:07,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1004, Invalid=3156, Unknown=0, NotChecked=0, Total=4160 [2018-10-10 16:21:07,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-10 16:21:07,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 124. [2018-10-10 16:21:07,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-10 16:21:07,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-10-10 16:21:07,895 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 111 [2018-10-10 16:21:07,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:21:07,896 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-10-10 16:21:07,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-10 16:21:07,896 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-10-10 16:21:07,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-10 16:21:07,898 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:21:07,898 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:21:07,898 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:21:07,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:21:07,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1504672775, now seen corresponding path program 6 times [2018-10-10 16:21:07,900 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:21:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:21:08,677 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:21:08,678 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:21:08,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-10-10 16:21:08,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-10 16:21:08,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-10 16:21:08,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2018-10-10 16:21:08,680 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 30 states. [2018-10-10 16:21:11,032 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-10 16:21:11,467 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:21:11,783 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-10 16:21:11,931 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:21:12,480 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-10 16:21:12,644 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2018-10-10 16:21:13,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:21:13,380 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-10-10 16:21:13,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-10 16:21:13,382 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 123 [2018-10-10 16:21:13,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:21:13,383 INFO L225 Difference]: With dead ends: 146 [2018-10-10 16:21:13,384 INFO L226 Difference]: Without dead ends: 146 [2018-10-10 16:21:13,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1064, Invalid=3628, Unknown=0, NotChecked=0, Total=4692 [2018-10-10 16:21:13,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-10 16:21:13,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 136. [2018-10-10 16:21:13,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-10 16:21:13,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-10-10 16:21:13,392 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 123 [2018-10-10 16:21:13,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:21:13,393 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-10-10 16:21:13,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-10 16:21:13,393 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-10-10 16:21:13,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-10 16:21:13,395 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:21:13,395 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:21:13,395 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:21:13,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:21:13,396 INFO L82 PathProgramCache]: Analyzing trace with hash 503813615, now seen corresponding path program 7 times [2018-10-10 16:21:13,396 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:21:13,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:21:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:21:14,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:21:14,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-10 16:21:14,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-10 16:21:14,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-10 16:21:14,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2018-10-10 16:21:14,878 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 32 states. [2018-10-10 16:21:15,583 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-10 16:21:17,520 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:21:17,662 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-10 16:21:18,590 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:21:20,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:21:20,453 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-10-10 16:21:20,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-10 16:21:20,454 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 135 [2018-10-10 16:21:20,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:21:20,455 INFO L225 Difference]: With dead ends: 158 [2018-10-10 16:21:20,455 INFO L226 Difference]: Without dead ends: 158 [2018-10-10 16:21:20,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1413, Invalid=4439, Unknown=0, NotChecked=0, Total=5852 [2018-10-10 16:21:20,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-10 16:21:20,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2018-10-10 16:21:20,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-10 16:21:20,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-10 16:21:20,463 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 135 [2018-10-10 16:21:20,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:21:20,464 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-10 16:21:20,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-10 16:21:20,464 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-10 16:21:20,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-10 16:21:20,466 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:21:20,466 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:21:20,466 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:21:20,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:21:20,467 INFO L82 PathProgramCache]: Analyzing trace with hash 281023447, now seen corresponding path program 8 times [2018-10-10 16:21:20,468 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:21:20,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:21:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:21:21,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:21:21,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-10 16:21:21,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-10 16:21:21,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-10 16:21:21,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2018-10-10 16:21:21,753 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 32 states. [2018-10-10 16:21:27,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:21:27,145 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2018-10-10 16:21:27,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-10 16:21:27,146 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 147 [2018-10-10 16:21:27,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:21:27,147 INFO L225 Difference]: With dead ends: 170 [2018-10-10 16:21:27,148 INFO L226 Difference]: Without dead ends: 170 [2018-10-10 16:21:27,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=927, Invalid=4623, Unknown=0, NotChecked=0, Total=5550 [2018-10-10 16:21:27,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-10 16:21:27,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2018-10-10 16:21:27,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-10 16:21:27,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-10-10 16:21:27,157 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 147 [2018-10-10 16:21:27,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:21:27,157 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-10-10 16:21:27,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-10 16:21:27,158 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-10-10 16:21:27,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-10 16:21:27,160 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:21:27,160 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:21:27,161 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:21:27,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:21:27,161 INFO L82 PathProgramCache]: Analyzing trace with hash -798820929, now seen corresponding path program 9 times [2018-10-10 16:21:27,162 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:21:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:21:28,228 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:21:28,228 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:21:28,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-10-10 16:21:28,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-10 16:21:28,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-10 16:21:28,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2018-10-10 16:21:28,230 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 36 states. [2018-10-10 16:21:30,143 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-10 16:21:31,183 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:21:31,329 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:21:31,751 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:21:32,844 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:21:33,045 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:21:34,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:21:34,497 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2018-10-10 16:21:34,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-10 16:21:34,498 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 159 [2018-10-10 16:21:34,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:21:34,499 INFO L225 Difference]: With dead ends: 182 [2018-10-10 16:21:34,499 INFO L226 Difference]: Without dead ends: 182 [2018-10-10 16:21:34,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1890, Invalid=5942, Unknown=0, NotChecked=0, Total=7832 [2018-10-10 16:21:34,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-10 16:21:34,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 172. [2018-10-10 16:21:34,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-10-10 16:21:34,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2018-10-10 16:21:34,506 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 159 [2018-10-10 16:21:34,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:21:34,507 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2018-10-10 16:21:34,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-10 16:21:34,507 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2018-10-10 16:21:34,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-10 16:21:34,508 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:21:34,509 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:21:34,509 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:21:34,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:21:34,509 INFO L82 PathProgramCache]: Analyzing trace with hash 2088385447, now seen corresponding path program 10 times [2018-10-10 16:21:34,510 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:21:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:21:35,475 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:21:35,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:21:35,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-10 16:21:35,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-10 16:21:35,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-10 16:21:35,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2018-10-10 16:21:35,477 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 38 states. [2018-10-10 16:21:37,883 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-10 16:21:38,054 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:21:38,217 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-10 16:21:38,585 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:21:38,730 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:21:39,143 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:21:39,291 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:21:39,798 WARN L178 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:21:39,958 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:21:40,408 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:21:40,574 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:21:41,027 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:21:41,192 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-10 16:21:41,629 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-10 16:21:42,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:21:42,558 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2018-10-10 16:21:42,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-10 16:21:42,559 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 171 [2018-10-10 16:21:42,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:21:42,561 INFO L225 Difference]: With dead ends: 194 [2018-10-10 16:21:42,561 INFO L226 Difference]: Without dead ends: 194 [2018-10-10 16:21:42,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1966, Invalid=6590, Unknown=0, NotChecked=0, Total=8556 [2018-10-10 16:21:42,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-10 16:21:42,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 184. [2018-10-10 16:21:42,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-10 16:21:42,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2018-10-10 16:21:42,569 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 171 [2018-10-10 16:21:42,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:21:42,570 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2018-10-10 16:21:42,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-10 16:21:42,570 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2018-10-10 16:21:42,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-10 16:21:42,571 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:21:42,571 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:21:42,571 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:21:42,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:21:42,572 INFO L82 PathProgramCache]: Analyzing trace with hash 898622863, now seen corresponding path program 11 times [2018-10-10 16:21:42,572 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:21:42,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:21:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:21:44,013 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:21:44,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-10 16:21:44,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-10 16:21:44,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-10 16:21:44,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1349, Unknown=0, NotChecked=0, Total=1560 [2018-10-10 16:21:44,015 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand 40 states. [2018-10-10 16:21:46,022 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-10 16:21:48,135 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:21:48,311 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:21:48,784 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:21:49,361 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:21:51,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:21:51,617 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2018-10-10 16:21:51,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-10 16:21:51,617 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 183 [2018-10-10 16:21:51,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:21:51,619 INFO L225 Difference]: With dead ends: 206 [2018-10-10 16:21:51,619 INFO L226 Difference]: Without dead ends: 206 [2018-10-10 16:21:51,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=2435, Invalid=7665, Unknown=0, NotChecked=0, Total=10100 [2018-10-10 16:21:51,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-10-10 16:21:51,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 196. [2018-10-10 16:21:51,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-10 16:21:51,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2018-10-10 16:21:51,626 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 183 [2018-10-10 16:21:51,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:21:51,627 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2018-10-10 16:21:51,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-10 16:21:51,627 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2018-10-10 16:21:51,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-10-10 16:21:51,628 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:21:51,628 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:21:51,628 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:21:51,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:21:51,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1657932937, now seen corresponding path program 12 times [2018-10-10 16:21:51,629 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:21:51,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:21:52,954 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:21:52,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:21:52,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-10-10 16:21:52,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-10 16:21:52,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-10 16:21:52,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2018-10-10 16:21:52,956 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 42 states. [2018-10-10 16:21:55,757 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2018-10-10 16:21:56,385 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-10 16:21:56,536 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2018-10-10 16:21:57,060 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-10 16:21:57,242 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:21:57,755 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:21:57,938 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:21:58,407 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:21:58,624 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:21:58,788 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-10 16:21:59,146 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:21:59,336 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-10 16:21:59,823 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-10 16:21:59,998 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-10 16:22:00,335 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-10 16:22:00,507 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-10 16:22:00,820 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2018-10-10 16:22:01,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:22:01,709 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2018-10-10 16:22:01,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-10 16:22:01,709 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 195 [2018-10-10 16:22:01,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:22:01,711 INFO L225 Difference]: With dead ends: 218 [2018-10-10 16:22:01,711 INFO L226 Difference]: Without dead ends: 218 [2018-10-10 16:22:01,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2105 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=2185, Invalid=8321, Unknown=0, NotChecked=0, Total=10506 [2018-10-10 16:22:01,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-10-10 16:22:01,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 208. [2018-10-10 16:22:01,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-10 16:22:01,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2018-10-10 16:22:01,716 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 195 [2018-10-10 16:22:01,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:22:01,717 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2018-10-10 16:22:01,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-10 16:22:01,717 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2018-10-10 16:22:01,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-10 16:22:01,718 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:22:01,718 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:22:01,718 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:22:01,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:22:01,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1440638303, now seen corresponding path program 13 times [2018-10-10 16:22:01,719 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:22:01,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:22:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:22:02,975 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:22:02,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-10 16:22:02,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-10 16:22:02,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-10 16:22:02,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1625, Unknown=0, NotChecked=0, Total=1892 [2018-10-10 16:22:02,976 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 44 states. [2018-10-10 16:22:07,435 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:22:08,748 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:22:09,104 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-10 16:22:09,890 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:22:12,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:22:12,291 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2018-10-10 16:22:12,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-10 16:22:12,291 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 207 [2018-10-10 16:22:12,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:22:12,293 INFO L225 Difference]: With dead ends: 230 [2018-10-10 16:22:12,293 INFO L226 Difference]: Without dead ends: 230 [2018-10-10 16:22:12,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2716 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=3048, Invalid=9608, Unknown=0, NotChecked=0, Total=12656 [2018-10-10 16:22:12,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-10-10 16:22:12,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 220. [2018-10-10 16:22:12,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-10 16:22:12,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 220 transitions. [2018-10-10 16:22:12,301 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 220 transitions. Word has length 207 [2018-10-10 16:22:12,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:22:12,301 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 220 transitions. [2018-10-10 16:22:12,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-10 16:22:12,301 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 220 transitions. [2018-10-10 16:22:12,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-10 16:22:12,302 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:22:12,303 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:22:12,303 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:22:12,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:22:12,303 INFO L82 PathProgramCache]: Analyzing trace with hash -2094318777, now seen corresponding path program 14 times [2018-10-10 16:22:12,304 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:22:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:22:13,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:22:13,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:22:13,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-10 16:22:13,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-10 16:22:13,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-10 16:22:13,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1799, Unknown=0, NotChecked=0, Total=2070 [2018-10-10 16:22:13,663 INFO L87 Difference]: Start difference. First operand 220 states and 220 transitions. Second operand 46 states. [2018-10-10 16:22:16,573 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-10 16:22:16,715 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:22:17,167 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:22:17,307 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:22:17,721 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:22:17,871 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:22:18,308 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:22:18,471 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:22:18,911 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:22:19,137 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:22:19,645 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:22:19,815 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:22:20,266 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:22:20,447 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:22:20,925 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:22:21,111 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:22:21,587 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:22:21,776 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:22:22,273 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:22:22,469 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-10 16:22:22,955 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-10 16:22:23,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:22:23,945 INFO L93 Difference]: Finished difference Result 242 states and 242 transitions. [2018-10-10 16:22:23,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-10 16:22:23,946 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 219 [2018-10-10 16:22:23,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:22:23,947 INFO L225 Difference]: With dead ends: 242 [2018-10-10 16:22:23,947 INFO L226 Difference]: Without dead ends: 242 [2018-10-10 16:22:23,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2906 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=3140, Invalid=10432, Unknown=0, NotChecked=0, Total=13572 [2018-10-10 16:22:23,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-10-10 16:22:23,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 232. [2018-10-10 16:22:23,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-10-10 16:22:23,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2018-10-10 16:22:23,953 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 219 [2018-10-10 16:22:23,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:22:23,954 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2018-10-10 16:22:23,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-10 16:22:23,954 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2018-10-10 16:22:23,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-10-10 16:22:23,955 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:22:23,956 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:22:23,956 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:22:23,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:22:23,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1235121455, now seen corresponding path program 15 times [2018-10-10 16:22:23,957 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:22:23,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:22:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:22:25,470 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:22:25,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-10 16:22:25,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-10 16:22:25,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-10 16:22:25,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1925, Unknown=0, NotChecked=0, Total=2256 [2018-10-10 16:22:25,472 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand 48 states. [2018-10-10 16:22:29,386 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:22:29,570 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:22:34,458 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2018-10-10 16:22:35,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:22:35,497 INFO L93 Difference]: Finished difference Result 254 states and 254 transitions. [2018-10-10 16:22:35,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-10 16:22:35,498 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 231 [2018-10-10 16:22:35,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:22:35,499 INFO L225 Difference]: With dead ends: 254 [2018-10-10 16:22:35,499 INFO L226 Difference]: Without dead ends: 254 [2018-10-10 16:22:35,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3423 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=3729, Invalid=11771, Unknown=0, NotChecked=0, Total=15500 [2018-10-10 16:22:35,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-10-10 16:22:35,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 244. [2018-10-10 16:22:35,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-10-10 16:22:35,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 244 transitions. [2018-10-10 16:22:35,505 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 244 transitions. Word has length 231 [2018-10-10 16:22:35,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:22:35,505 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 244 transitions. [2018-10-10 16:22:35,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-10 16:22:35,506 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 244 transitions. [2018-10-10 16:22:35,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-10 16:22:35,507 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:22:35,507 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:22:35,508 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:22:35,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:22:35,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1321341719, now seen corresponding path program 16 times [2018-10-10 16:22:35,509 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:22:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:22:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:22:37,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:22:37,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-10 16:22:37,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-10 16:22:37,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-10 16:22:37,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2122, Unknown=0, NotChecked=0, Total=2256 [2018-10-10 16:22:37,332 INFO L87 Difference]: Start difference. First operand 244 states and 244 transitions. Second operand 48 states. [2018-10-10 16:22:48,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:22:48,319 INFO L93 Difference]: Finished difference Result 266 states and 266 transitions. [2018-10-10 16:22:48,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-10 16:22:48,320 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 243 [2018-10-10 16:22:48,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:22:48,321 INFO L225 Difference]: With dead ends: 266 [2018-10-10 16:22:48,321 INFO L226 Difference]: Without dead ends: 266 [2018-10-10 16:22:48,323 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2323 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1535, Invalid=11575, Unknown=0, NotChecked=0, Total=13110 [2018-10-10 16:22:48,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-10-10 16:22:48,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 256. [2018-10-10 16:22:48,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-10-10 16:22:48,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 256 transitions. [2018-10-10 16:22:48,327 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 256 transitions. Word has length 243 [2018-10-10 16:22:48,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:22:48,328 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 256 transitions. [2018-10-10 16:22:48,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-10 16:22:48,328 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 256 transitions. [2018-10-10 16:22:48,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-10-10 16:22:48,329 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:22:48,329 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:22:48,330 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:22:48,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:22:48,330 INFO L82 PathProgramCache]: Analyzing trace with hash 958403839, now seen corresponding path program 17 times [2018-10-10 16:22:48,331 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:22:48,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:22:49,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:22:49,798 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:22:49,798 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-10-10 16:22:49,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-10 16:22:49,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-10 16:22:49,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=2249, Unknown=0, NotChecked=0, Total=2652 [2018-10-10 16:22:49,799 INFO L87 Difference]: Start difference. First operand 256 states and 256 transitions. Second operand 52 states. [2018-10-10 16:22:54,893 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:22:55,099 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:22:55,540 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:22:57,365 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:23:01,114 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:23:02,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:23:02,366 INFO L93 Difference]: Finished difference Result 278 states and 278 transitions. [2018-10-10 16:23:02,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-10 16:23:02,367 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 255 [2018-10-10 16:23:02,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:23:02,369 INFO L225 Difference]: With dead ends: 278 [2018-10-10 16:23:02,369 INFO L226 Difference]: Without dead ends: 278 [2018-10-10 16:23:02,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4214 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=4478, Invalid=14154, Unknown=0, NotChecked=0, Total=18632 [2018-10-10 16:23:02,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-10-10 16:23:02,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 268. [2018-10-10 16:23:02,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-10-10 16:23:02,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 268 transitions. [2018-10-10 16:23:02,375 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 268 transitions. Word has length 255 [2018-10-10 16:23:02,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:23:02,377 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 268 transitions. [2018-10-10 16:23:02,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-10 16:23:02,377 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 268 transitions. [2018-10-10 16:23:02,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-10-10 16:23:02,378 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:23:02,378 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:23:02,378 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:23:02,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:23:02,379 INFO L82 PathProgramCache]: Analyzing trace with hash 809663207, now seen corresponding path program 18 times [2018-10-10 16:23:02,379 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:23:02,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:23:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:23:04,049 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:23:04,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-10-10 16:23:04,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-10 16:23:04,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-10 16:23:04,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2455, Unknown=0, NotChecked=0, Total=2862 [2018-10-10 16:23:04,051 INFO L87 Difference]: Start difference. First operand 268 states and 268 transitions. Second operand 54 states. [2018-10-10 16:23:07,622 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:23:08,168 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:23:08,721 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:23:09,295 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:23:09,886 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:23:10,214 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-10 16:23:10,414 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-10 16:23:10,628 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:23:10,801 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:23:11,262 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:23:11,906 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:23:12,092 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:23:12,575 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:23:12,778 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:23:13,283 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:23:13,478 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:23:13,995 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:23:14,200 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:23:14,728 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:23:14,937 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:23:15,504 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:23:17,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:23:17,374 INFO L93 Difference]: Finished difference Result 290 states and 290 transitions. [2018-10-10 16:23:17,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-10 16:23:17,380 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 267 [2018-10-10 16:23:17,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:23:17,382 INFO L225 Difference]: With dead ends: 290 [2018-10-10 16:23:17,382 INFO L226 Difference]: Without dead ends: 290 [2018-10-10 16:23:17,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4448 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=4586, Invalid=15154, Unknown=0, NotChecked=0, Total=19740 [2018-10-10 16:23:17,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-10-10 16:23:17,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 280. [2018-10-10 16:23:17,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-10-10 16:23:17,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 280 transitions. [2018-10-10 16:23:17,389 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 280 transitions. Word has length 267 [2018-10-10 16:23:17,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:23:17,389 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 280 transitions. [2018-10-10 16:23:17,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-10 16:23:17,389 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 280 transitions. [2018-10-10 16:23:17,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-10-10 16:23:17,391 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:23:17,391 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:23:17,391 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:23:17,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:23:17,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1555252431, now seen corresponding path program 19 times [2018-10-10 16:23:17,392 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:23:17,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:23:19,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:23:19,251 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:23:19,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-10-10 16:23:19,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-10 16:23:19,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-10 16:23:19,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=2597, Unknown=0, NotChecked=0, Total=3080 [2018-10-10 16:23:19,252 INFO L87 Difference]: Start difference. First operand 280 states and 280 transitions. Second operand 56 states. [2018-10-10 16:23:21,360 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2018-10-10 16:23:25,567 WARN L178 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-10 16:23:25,745 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:23:25,927 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:23:30,985 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:23:33,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:23:33,711 INFO L93 Difference]: Finished difference Result 302 states and 302 transitions. [2018-10-10 16:23:33,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-10 16:23:33,711 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 279 [2018-10-10 16:23:33,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:23:33,713 INFO L225 Difference]: With dead ends: 302 [2018-10-10 16:23:33,713 INFO L226 Difference]: Without dead ends: 302 [2018-10-10 16:23:33,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5089 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=5295, Invalid=16757, Unknown=0, NotChecked=0, Total=22052 [2018-10-10 16:23:33,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2018-10-10 16:23:33,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 292. [2018-10-10 16:23:33,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-10-10 16:23:33,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 292 transitions. [2018-10-10 16:23:33,720 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 292 transitions. Word has length 279 [2018-10-10 16:23:33,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:23:33,720 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 292 transitions. [2018-10-10 16:23:33,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-10 16:23:33,721 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 292 transitions. [2018-10-10 16:23:33,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-10-10 16:23:33,722 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:23:33,723 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:23:33,723 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:23:33,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:23:33,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1744597687, now seen corresponding path program 20 times [2018-10-10 16:23:33,724 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:23:33,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:23:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:23:35,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:23:35,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-10-10 16:23:35,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-10 16:23:35,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-10 16:23:35,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=2891, Unknown=0, NotChecked=0, Total=3306 [2018-10-10 16:23:35,912 INFO L87 Difference]: Start difference. First operand 292 states and 292 transitions. Second operand 58 states. [2018-10-10 16:23:39,745 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-10 16:23:40,472 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-10 16:23:40,664 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:23:41,094 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-10 16:23:41,330 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:23:41,510 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:23:41,998 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:23:42,176 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:23:42,656 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:23:42,840 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:23:43,328 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:23:43,519 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:23:44,039 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:23:44,256 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:23:44,796 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:23:45,017 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:23:45,562 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:23:45,774 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:23:46,160 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-10 16:23:46,407 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:23:46,628 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:23:47,190 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:23:47,415 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:23:47,985 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:23:48,235 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:23:48,870 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:23:49,116 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-10 16:23:49,724 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-10 16:23:49,964 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-10 16:23:50,397 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-10 16:23:50,629 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-10 16:23:51,053 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2018-10-10 16:23:51,326 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2018-10-10 16:23:52,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:23:52,292 INFO L93 Difference]: Finished difference Result 314 states and 314 transitions. [2018-10-10 16:23:52,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-10 16:23:52,292 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 291 [2018-10-10 16:23:52,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:23:52,293 INFO L225 Difference]: With dead ends: 314 [2018-10-10 16:23:52,294 INFO L226 Difference]: Without dead ends: 314 [2018-10-10 16:23:52,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5093 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=4885, Invalid=17765, Unknown=0, NotChecked=0, Total=22650 [2018-10-10 16:23:52,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2018-10-10 16:23:52,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 304. [2018-10-10 16:23:52,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-10-10 16:23:52,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 304 transitions. [2018-10-10 16:23:52,300 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 304 transitions. Word has length 291 [2018-10-10 16:23:52,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:23:52,300 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 304 transitions. [2018-10-10 16:23:52,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-10 16:23:52,301 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 304 transitions. [2018-10-10 16:23:52,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-10-10 16:23:52,302 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:23:52,302 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:23:52,303 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:23:52,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:23:52,303 INFO L82 PathProgramCache]: Analyzing trace with hash -56097633, now seen corresponding path program 21 times [2018-10-10 16:23:52,303 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:23:52,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:23:54,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:23:54,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:23:54,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-10-10 16:23:54,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-10 16:23:54,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-10 16:23:54,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=2969, Unknown=0, NotChecked=0, Total=3540 [2018-10-10 16:23:54,706 INFO L87 Difference]: Start difference. First operand 304 states and 304 transitions. Second operand 60 states. [2018-10-10 16:24:01,431 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:24:09,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:24:09,796 INFO L93 Difference]: Finished difference Result 326 states and 326 transitions. [2018-10-10 16:24:09,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-10 16:24:09,798 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 303 [2018-10-10 16:24:09,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:24:09,800 INFO L225 Difference]: With dead ends: 326 [2018-10-10 16:24:09,800 INFO L226 Difference]: Without dead ends: 326 [2018-10-10 16:24:09,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6048 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=6180, Invalid=19580, Unknown=0, NotChecked=0, Total=25760 [2018-10-10 16:24:09,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2018-10-10 16:24:09,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 316. [2018-10-10 16:24:09,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-10-10 16:24:09,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 316 transitions. [2018-10-10 16:24:09,807 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 316 transitions. Word has length 303 [2018-10-10 16:24:09,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:24:09,807 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 316 transitions. [2018-10-10 16:24:09,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-10 16:24:09,807 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 316 transitions. [2018-10-10 16:24:09,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-10-10 16:24:09,809 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:24:09,809 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:24:09,809 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:24:09,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:24:09,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1178598023, now seen corresponding path program 22 times [2018-10-10 16:24:09,810 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:24:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:24:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:24:12,596 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:24:12,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-10-10 16:24:12,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-10 16:24:12,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-10 16:24:12,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=3207, Unknown=0, NotChecked=0, Total=3782 [2018-10-10 16:24:12,597 INFO L87 Difference]: Start difference. First operand 316 states and 316 transitions. Second operand 62 states. [2018-10-10 16:24:15,390 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-10 16:24:15,530 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:24:15,973 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:24:16,115 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:24:16,521 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:24:16,667 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:24:17,014 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-10 16:24:17,171 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:24:17,323 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:24:17,838 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:24:17,998 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:24:18,446 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:24:18,611 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:24:19,065 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:24:19,233 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:24:19,703 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:24:19,889 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:24:20,406 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:24:20,593 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:24:21,098 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:24:21,296 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:24:21,838 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:24:22,078 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:24:22,663 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:24:22,872 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:24:23,406 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:24:23,621 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:24:24,181 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:24:24,401 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:24:24,981 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:24:25,756 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:24:25,983 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:24:26,548 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:24:27,250 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-10 16:24:27,498 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:24:28,294 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-10 16:24:29,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:24:29,537 INFO L93 Difference]: Finished difference Result 338 states and 338 transitions. [2018-10-10 16:24:29,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-10 16:24:29,537 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 315 [2018-10-10 16:24:29,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:24:29,539 INFO L225 Difference]: With dead ends: 338 [2018-10-10 16:24:29,539 INFO L226 Difference]: Without dead ends: 338 [2018-10-10 16:24:29,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6326 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=6304, Invalid=20756, Unknown=0, NotChecked=0, Total=27060 [2018-10-10 16:24:29,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-10-10 16:24:29,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 328. [2018-10-10 16:24:29,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-10-10 16:24:29,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 328 transitions. [2018-10-10 16:24:29,545 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 328 transitions. Word has length 315 [2018-10-10 16:24:29,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:24:29,546 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 328 transitions. [2018-10-10 16:24:29,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-10 16:24:29,546 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 328 transitions. [2018-10-10 16:24:29,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-10-10 16:24:29,548 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:24:29,548 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:24:29,548 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:24:29,548 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:24:29,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1900958831, now seen corresponding path program 23 times [2018-10-10 16:24:29,549 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:24:29,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:24:31,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:24:31,721 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:24:31,721 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-10-10 16:24:31,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-10 16:24:31,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-10 16:24:31,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=667, Invalid=3365, Unknown=0, NotChecked=0, Total=4032 [2018-10-10 16:24:31,722 INFO L87 Difference]: Start difference. First operand 328 states and 328 transitions. Second operand 64 states. [2018-10-10 16:24:34,640 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-10 16:24:37,399 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:24:37,589 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:24:39,391 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:24:42,728 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:24:45,768 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:24:47,721 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:24:49,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:24:49,743 INFO L93 Difference]: Finished difference Result 350 states and 350 transitions. [2018-10-10 16:24:49,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-10-10 16:24:49,744 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 327 [2018-10-10 16:24:49,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:24:49,745 INFO L225 Difference]: With dead ends: 350 [2018-10-10 16:24:49,745 INFO L226 Difference]: Without dead ends: 350 [2018-10-10 16:24:49,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7091 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=7133, Invalid=22623, Unknown=0, NotChecked=0, Total=29756 [2018-10-10 16:24:49,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2018-10-10 16:24:49,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 340. [2018-10-10 16:24:49,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-10-10 16:24:49,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 340 transitions. [2018-10-10 16:24:49,751 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 340 transitions. Word has length 327 [2018-10-10 16:24:49,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:24:49,751 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 340 transitions. [2018-10-10 16:24:49,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-10 16:24:49,751 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 340 transitions. [2018-10-10 16:24:49,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-10-10 16:24:49,753 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:24:49,753 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:24:49,754 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:24:49,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:24:49,754 INFO L82 PathProgramCache]: Analyzing trace with hash 727519831, now seen corresponding path program 24 times [2018-10-10 16:24:49,755 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:24:49,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:24:52,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:24:52,103 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:24:52,104 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-10-10 16:24:52,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-10 16:24:52,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-10 16:24:52,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=3859, Unknown=0, NotChecked=0, Total=4290 [2018-10-10 16:24:52,105 INFO L87 Difference]: Start difference. First operand 340 states and 340 transitions. Second operand 66 states. [2018-10-10 16:24:55,828 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-10 16:24:56,544 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2018-10-10 16:24:56,717 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 49 [2018-10-10 16:24:57,283 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 49 [2018-10-10 16:24:57,469 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 49 [2018-10-10 16:24:57,882 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 43 [2018-10-10 16:24:58,174 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 49 [2018-10-10 16:24:58,378 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 49 [2018-10-10 16:24:58,994 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 49 [2018-10-10 16:24:59,207 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 49 [2018-10-10 16:24:59,560 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 49 [2018-10-10 16:24:59,860 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 56 [2018-10-10 16:25:00,109 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 16:25:00,289 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 16:25:00,508 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 16:25:00,754 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 16:25:00,999 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 16:25:01,177 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 16:25:01,363 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 16:25:01,609 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 16:25:01,859 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 16:25:02,044 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 16:25:02,243 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 16:25:02,500 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 16:25:02,765 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 16:25:03,011 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 16:25:03,235 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 16:25:03,514 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 16:25:03,791 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 16:25:03,999 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 16:25:04,203 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 16:25:04,475 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 16:25:04,765 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 16:25:04,968 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 16:25:05,178 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 16:25:05,459 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 16:25:05,749 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 16:25:05,955 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 16:25:06,161 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 16:25:06,456 WARN L178 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 16:25:06,753 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 58 [2018-10-10 16:25:06,964 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2018-10-10 16:25:07,178 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2018-10-10 16:25:07,469 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 57 [2018-10-10 16:25:07,780 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 58 [2018-10-10 16:25:08,005 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2018-10-10 16:25:08,330 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 57 [2018-10-10 16:25:08,620 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 58 [2018-10-10 16:25:08,840 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 50 [2018-10-10 16:25:09,135 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 57 [2018-10-10 16:25:09,403 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2018-10-10 16:25:09,884 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2018-10-10 16:25:10,144 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2018-10-10 16:25:10,597 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2018-10-10 16:25:10,849 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2018-10-10 16:25:11,299 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2018-10-10 16:25:11,555 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2018-10-10 16:25:13,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:25:13,248 INFO L93 Difference]: Finished difference Result 362 states and 362 transitions. [2018-10-10 16:25:13,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-10 16:25:13,249 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 339 [2018-10-10 16:25:13,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:25:13,250 INFO L225 Difference]: With dead ends: 362 [2018-10-10 16:25:13,251 INFO L226 Difference]: Without dead ends: 362 [2018-10-10 16:25:13,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6491 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=5471, Invalid=23599, Unknown=0, NotChecked=0, Total=29070 [2018-10-10 16:25:13,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2018-10-10 16:25:13,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 352. [2018-10-10 16:25:13,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-10-10 16:25:13,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 352 transitions. [2018-10-10 16:25:13,255 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 352 transitions. Word has length 339 [2018-10-10 16:25:13,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:25:13,256 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 352 transitions. [2018-10-10 16:25:13,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-10 16:25:13,256 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 352 transitions. [2018-10-10 16:25:13,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-10-10 16:25:13,257 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:25:13,257 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:25:13,257 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:25:13,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:25:13,258 INFO L82 PathProgramCache]: Analyzing trace with hash 586560575, now seen corresponding path program 25 times [2018-10-10 16:25:13,258 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:25:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:25:16,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:25:16,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:25:16,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-10-10 16:25:16,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-10 16:25:16,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-10 16:25:16,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=771, Invalid=3785, Unknown=0, NotChecked=0, Total=4556 [2018-10-10 16:25:16,007 INFO L87 Difference]: Start difference. First operand 352 states and 352 transitions. Second operand 68 states. [2018-10-10 16:25:18,218 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2018-10-10 16:25:23,582 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:25:28,395 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:25:28,674 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:25:30,899 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:25:33,633 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:25:35,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:25:35,879 INFO L93 Difference]: Finished difference Result 374 states and 374 transitions. [2018-10-10 16:25:35,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-10-10 16:25:35,880 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 351 [2018-10-10 16:25:35,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:25:35,881 INFO L225 Difference]: With dead ends: 374 [2018-10-10 16:25:35,882 INFO L226 Difference]: Without dead ends: 374 [2018-10-10 16:25:35,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8218 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=8154, Invalid=25886, Unknown=0, NotChecked=0, Total=34040 [2018-10-10 16:25:35,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2018-10-10 16:25:35,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 364. [2018-10-10 16:25:35,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-10-10 16:25:35,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 364 transitions. [2018-10-10 16:25:35,889 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 364 transitions. Word has length 351 [2018-10-10 16:25:35,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:25:35,889 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 364 transitions. [2018-10-10 16:25:35,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-10 16:25:35,889 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 364 transitions. [2018-10-10 16:25:35,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-10-10 16:25:35,891 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:25:35,892 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:25:35,892 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:25:35,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:25:35,892 INFO L82 PathProgramCache]: Analyzing trace with hash -2019313113, now seen corresponding path program 26 times [2018-10-10 16:25:35,893 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:25:35,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:25:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:25:38,521 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:25:38,521 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-10-10 16:25:38,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-10 16:25:38,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-10 16:25:38,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=775, Invalid=4055, Unknown=0, NotChecked=0, Total=4830 [2018-10-10 16:25:38,523 INFO L87 Difference]: Start difference. First operand 364 states and 364 transitions. Second operand 70 states. [2018-10-10 16:25:41,091 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-10 16:25:41,235 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:25:41,682 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:25:41,824 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:25:42,257 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:25:42,410 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:25:42,862 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:25:43,022 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:25:43,484 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:25:43,644 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:25:44,184 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:25:44,356 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:25:44,849 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:25:45,026 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:25:45,496 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:25:46,148 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:25:46,331 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:25:46,830 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:25:47,016 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:25:47,528 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:25:47,732 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:25:48,258 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:25:49,035 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:25:49,855 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:25:50,616 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:25:51,398 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:25:52,197 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:25:52,426 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:25:53,019 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:25:53,871 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:25:54,156 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:25:54,812 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:25:55,061 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:25:55,679 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:25:56,564 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:25:57,435 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-10 16:25:58,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:25:58,773 INFO L93 Difference]: Finished difference Result 386 states and 386 transitions. [2018-10-10 16:25:58,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-10-10 16:25:58,774 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 363 [2018-10-10 16:25:58,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:25:58,776 INFO L225 Difference]: With dead ends: 386 [2018-10-10 16:25:58,776 INFO L226 Difference]: Without dead ends: 386 [2018-10-10 16:25:58,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8540 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=8294, Invalid=27238, Unknown=0, NotChecked=0, Total=35532 [2018-10-10 16:25:58,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2018-10-10 16:25:58,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 376. [2018-10-10 16:25:58,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2018-10-10 16:25:58,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 376 transitions. [2018-10-10 16:25:58,783 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 376 transitions. Word has length 363 [2018-10-10 16:25:58,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:25:58,783 INFO L481 AbstractCegarLoop]: Abstraction has 376 states and 376 transitions. [2018-10-10 16:25:58,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-10 16:25:58,784 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 376 transitions. [2018-10-10 16:25:58,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-10-10 16:25:58,786 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:25:58,786 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:25:58,786 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:25:58,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:25:58,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1980783601, now seen corresponding path program 27 times [2018-10-10 16:25:58,787 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:25:58,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:25:59,360 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-10 16:26:01,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:26:01,773 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:26:01,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-10-10 16:26:01,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-10 16:26:01,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-10 16:26:01,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=883, Invalid=4229, Unknown=0, NotChecked=0, Total=5112 [2018-10-10 16:26:01,775 INFO L87 Difference]: Start difference. First operand 376 states and 376 transitions. Second operand 72 states. [2018-10-10 16:26:04,264 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2018-10-10 16:26:04,915 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-10 16:26:07,774 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:26:09,751 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:26:11,080 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:26:14,728 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:26:19,740 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:26:23,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:26:23,757 INFO L93 Difference]: Finished difference Result 398 states and 398 transitions. [2018-10-10 16:26:23,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-10 16:26:23,758 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 375 [2018-10-10 16:26:23,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:26:23,760 INFO L225 Difference]: With dead ends: 398 [2018-10-10 16:26:23,760 INFO L226 Difference]: Without dead ends: 398 [2018-10-10 16:26:23,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9429 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=9243, Invalid=29369, Unknown=0, NotChecked=0, Total=38612 [2018-10-10 16:26:23,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2018-10-10 16:26:23,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 388. [2018-10-10 16:26:23,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-10-10 16:26:23,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 388 transitions. [2018-10-10 16:26:23,767 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 388 transitions. Word has length 375 [2018-10-10 16:26:23,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:26:23,768 INFO L481 AbstractCegarLoop]: Abstraction has 388 states and 388 transitions. [2018-10-10 16:26:23,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-10 16:26:23,768 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 388 transitions. [2018-10-10 16:26:23,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-10-10 16:26:23,770 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:26:23,770 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:26:23,770 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:26:23,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:26:23,771 INFO L82 PathProgramCache]: Analyzing trace with hash -614206985, now seen corresponding path program 28 times [2018-10-10 16:26:23,771 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:26:23,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:26:27,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:26:27,358 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:26:27,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-10-10 16:26:27,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-10 16:26:27,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-10 16:26:27,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=4619, Unknown=0, NotChecked=0, Total=5402 [2018-10-10 16:26:27,360 INFO L87 Difference]: Start difference. First operand 388 states and 388 transitions. Second operand 74 states. [2018-10-10 16:26:29,909 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2018-10-10 16:26:30,082 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2018-10-10 16:26:30,632 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-10 16:26:31,268 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-10 16:26:31,444 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:26:31,946 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:26:32,116 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:26:32,598 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:26:32,776 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:26:33,271 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:26:33,456 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:26:33,966 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:26:34,161 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:26:34,689 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:26:34,885 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:26:35,130 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-10 16:26:35,390 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-10 16:26:35,591 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:26:35,812 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:26:36,378 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:26:36,595 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:26:36,792 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-10 16:26:37,188 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:26:37,417 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:26:38,017 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:26:38,261 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:26:38,865 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:26:39,103 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:26:39,718 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:26:39,968 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:26:40,201 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-10 16:26:40,453 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-10 16:26:40,685 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:26:40,938 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:26:41,588 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:26:41,851 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:26:42,509 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:26:42,779 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:26:43,445 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:26:43,716 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:26:44,406 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:26:44,692 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:26:45,440 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:26:45,763 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:26:46,473 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:26:46,769 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:26:47,485 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:26:47,786 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-10 16:26:48,475 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-10 16:26:48,753 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-10 16:26:49,260 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-10 16:26:49,534 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-10 16:26:50,644 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2018-10-10 16:26:51,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:26:51,615 INFO L93 Difference]: Finished difference Result 410 states and 410 transitions. [2018-10-10 16:26:51,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-10 16:26:51,616 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 387 [2018-10-10 16:26:51,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:26:51,617 INFO L225 Difference]: With dead ends: 410 [2018-10-10 16:26:51,617 INFO L226 Difference]: Without dead ends: 410 [2018-10-10 16:26:51,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9425 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=8673, Invalid=30729, Unknown=0, NotChecked=0, Total=39402 [2018-10-10 16:26:51,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2018-10-10 16:26:51,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 400. [2018-10-10 16:26:51,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2018-10-10 16:26:51,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 400 transitions. [2018-10-10 16:26:51,625 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 400 transitions. Word has length 387 [2018-10-10 16:26:51,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:26:51,626 INFO L481 AbstractCegarLoop]: Abstraction has 400 states and 400 transitions. [2018-10-10 16:26:51,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-10 16:26:51,626 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 400 transitions. [2018-10-10 16:26:51,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-10-10 16:26:51,628 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:26:51,629 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:26:51,629 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:26:51,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:26:51,629 INFO L82 PathProgramCache]: Analyzing trace with hash 780837855, now seen corresponding path program 29 times [2018-10-10 16:26:51,630 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:26:51,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:26:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 5017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:26:54,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:26:54,637 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-10-10 16:26:54,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-10 16:26:54,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-10 16:26:54,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1003, Invalid=4697, Unknown=0, NotChecked=0, Total=5700 [2018-10-10 16:26:54,638 INFO L87 Difference]: Start difference. First operand 400 states and 400 transitions. Second operand 76 states. [2018-10-10 16:27:00,577 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-10 16:27:00,772 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:27:00,992 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:27:05,490 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:27:10,673 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:27:10,940 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:27:14,245 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:27:15,164 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:27:16,158 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:27:17,153 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:27:18,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:27:18,899 INFO L93 Difference]: Finished difference Result 422 states and 422 transitions. [2018-10-10 16:27:18,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-10-10 16:27:18,900 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 399 [2018-10-10 16:27:18,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:27:18,901 INFO L225 Difference]: With dead ends: 422 [2018-10-10 16:27:18,901 INFO L226 Difference]: Without dead ends: 422 [2018-10-10 16:27:18,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10724 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=10400, Invalid=33072, Unknown=0, NotChecked=0, Total=43472 [2018-10-10 16:27:18,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2018-10-10 16:27:18,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 412. [2018-10-10 16:27:18,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-10-10 16:27:18,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 412 transitions. [2018-10-10 16:27:18,908 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 412 transitions. Word has length 399 [2018-10-10 16:27:18,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:27:18,909 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 412 transitions. [2018-10-10 16:27:18,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-10 16:27:18,909 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 412 transitions. [2018-10-10 16:27:18,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-10-10 16:27:18,911 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:27:18,911 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:27:18,911 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:27:18,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:27:18,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1225934393, now seen corresponding path program 30 times [2018-10-10 16:27:18,912 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:27:18,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:27:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:27:22,998 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:27:22,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-10-10 16:27:22,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-10 16:27:22,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-10 16:27:23,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1007, Invalid=4999, Unknown=0, NotChecked=0, Total=6006 [2018-10-10 16:27:23,000 INFO L87 Difference]: Start difference. First operand 412 states and 412 transitions. Second operand 78 states. [2018-10-10 16:27:26,496 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:27:27,057 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:27:27,200 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:27:27,633 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:27:28,232 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:27:28,852 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:27:29,669 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:27:30,141 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:27:30,315 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:27:30,986 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:27:31,336 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-10 16:27:31,536 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:27:31,748 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:27:32,266 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:27:32,991 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:27:33,721 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:27:34,468 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:27:36,039 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:27:36,503 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-10 16:27:37,831 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:27:38,662 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:27:39,515 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:27:40,419 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:27:40,672 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:27:41,338 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:27:41,625 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:27:41,869 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-10 16:27:42,291 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:27:42,560 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:27:43,234 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:27:44,186 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:27:45,145 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:27:46,122 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-10 16:27:47,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:27:47,696 INFO L93 Difference]: Finished difference Result 434 states and 434 transitions. [2018-10-10 16:27:47,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-10-10 16:27:47,696 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 411 [2018-10-10 16:27:47,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:27:47,698 INFO L225 Difference]: With dead ends: 434 [2018-10-10 16:27:47,698 INFO L226 Difference]: Without dead ends: 434 [2018-10-10 16:27:47,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11090 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=10556, Invalid=34600, Unknown=0, NotChecked=0, Total=45156 [2018-10-10 16:27:47,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-10-10 16:27:47,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 424. [2018-10-10 16:27:47,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-10-10 16:27:47,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 424 transitions. [2018-10-10 16:27:47,705 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 424 transitions. Word has length 411 [2018-10-10 16:27:47,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:27:47,705 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 424 transitions. [2018-10-10 16:27:47,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-10 16:27:47,706 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 424 transitions. [2018-10-10 16:27:47,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-10-10 16:27:47,708 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:27:47,708 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:27:47,708 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:27:47,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:27:47,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1458097233, now seen corresponding path program 31 times [2018-10-10 16:27:47,709 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:27:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:27:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:27:51,082 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:27:51,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-10 16:27:51,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-10 16:27:51,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-10 16:27:51,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1131, Invalid=5189, Unknown=0, NotChecked=0, Total=6320 [2018-10-10 16:27:51,083 INFO L87 Difference]: Start difference. First operand 424 states and 424 transitions. Second operand 80 states. [2018-10-10 16:27:56,926 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:28:02,075 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:28:02,322 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:28:04,405 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:28:05,996 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:28:06,817 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:28:07,367 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-10 16:28:07,763 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:28:08,640 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:28:12,226 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:28:12,564 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:28:13,241 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:28:16,154 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:28:17,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:28:17,978 INFO L93 Difference]: Finished difference Result 446 states and 446 transitions. [2018-10-10 16:28:17,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-10-10 16:28:17,979 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 423 [2018-10-10 16:28:17,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:28:17,981 INFO L225 Difference]: With dead ends: 446 [2018-10-10 16:28:17,981 INFO L226 Difference]: Without dead ends: 446 [2018-10-10 16:28:17,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12103 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=11625, Invalid=36995, Unknown=0, NotChecked=0, Total=48620 [2018-10-10 16:28:17,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2018-10-10 16:28:17,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 436. [2018-10-10 16:28:17,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2018-10-10 16:28:17,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 436 transitions. [2018-10-10 16:28:17,989 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 436 transitions. Word has length 423 [2018-10-10 16:28:17,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:28:17,989 INFO L481 AbstractCegarLoop]: Abstraction has 436 states and 436 transitions. [2018-10-10 16:28:17,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-10 16:28:17,989 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 436 transitions. [2018-10-10 16:28:17,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-10-10 16:28:17,992 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:28:17,992 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 16:28:17,992 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:28:17,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:28:17,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1164897897, now seen corresponding path program 32 times [2018-10-10 16:28:17,993 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:28:18,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:28:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 0 proven. 6112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:28:22,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:28:22,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-10 16:28:22,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-10 16:28:22,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-10 16:28:22,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=6090, Unknown=0, NotChecked=0, Total=6320 [2018-10-10 16:28:22,664 INFO L87 Difference]: Start difference. First operand 436 states and 436 transitions. Second operand 80 states.