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 0.1.23-502d2f4 [2018-10-12 22:28:25,139 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-12 22:28:25,141 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-12 22:28:25,157 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-12 22:28:25,158 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-12 22:28:25,159 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-12 22:28:25,163 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-12 22:28:25,167 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-12 22:28:25,172 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-12 22:28:25,173 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-12 22:28:25,177 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-12 22:28:25,177 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-12 22:28:25,178 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-12 22:28:25,179 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-12 22:28:25,183 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-12 22:28:25,184 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-12 22:28:25,186 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-12 22:28:25,193 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-12 22:28:25,195 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-12 22:28:25,200 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-12 22:28:25,201 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-12 22:28:25,203 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-12 22:28:25,208 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-12 22:28:25,227 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf [2018-10-12 22:28:25,242 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-12 22:28:25,243 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-12 22:28:25,244 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-12 22:28:25,245 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-12 22:28:25,245 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-12 22:28:25,245 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-12 22:28:25,246 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-12 22:28:25,246 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-12 22:28:25,246 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-12 22:28:25,247 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-12 22:28:25,248 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-12 22:28:25,248 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-12 22:28:25,248 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-12 22:28:25,252 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-12 22:28:25,252 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-12 22:28:25,322 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-12 22:28:25,338 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-12 22:28:25,345 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-12 22:28:25,347 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-12 22:28:25,348 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-12 22:28:25,349 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_false-valid-free.i_5.bpl [2018-10-12 22:28:25,349 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_false-valid-free.i_5.bpl' [2018-10-12 22:28:25,427 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-12 22:28:25,429 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-12 22:28:25,429 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-12 22:28:25,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-12 22:28:25,430 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-12 22:28:25,459 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 12.10 10:28:25" (1/1) ... [2018-10-12 22:28:25,462 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 12.10 10:28:25" (1/1) ... [2018-10-12 22:28:25,480 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 12.10 10:28:25" (1/1) ... [2018-10-12 22:28:25,481 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 12.10 10:28:25" (1/1) ... [2018-10-12 22:28:25,486 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 12.10 10:28:25" (1/1) ... [2018-10-12 22:28:25,490 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 12.10 10:28:25" (1/1) ... [2018-10-12 22:28:25,491 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 12.10 10:28:25" (1/1) ... [2018-10-12 22:28:25,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-12 22:28:25,498 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-12 22:28:25,499 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-12 22:28:25,499 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-12 22:28:25,500 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 12.10 10:28:25" (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 [2018-10-12 22:28:25,565 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-12 22:28:25,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-12 22:28:25,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-12 22:28:26,127 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-12 22:28:26,128 INFO L202 PluginConnector]: Adding new model 960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:28:26 BoogieIcfgContainer [2018-10-12 22:28:26,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-12 22:28:26,129 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2018-10-12 22:28:26,129 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2018-10-12 22:28:26,130 INFO L276 PluginConnector]: IcfgTransformer initialized [2018-10-12 22:28:26,134 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 12.10 10:28:26" (1/1) ... [2018-10-12 22:28:26,143 INFO L137 apSepIcfgTransformer]: HeapSepIcfgTransformer: Starting heap partitioning [2018-10-12 22:28:26,143 INFO L138 apSepIcfgTransformer]: To be partitioned heap arrays found [#memory_int] [2018-10-12 22:28:26,183 INFO L191 apSepIcfgTransformer]: Heap separator: starting loc-array-style preprocessing [2018-10-12 22:28:26,240 INFO L219 apSepIcfgTransformer]: finished MemlocArrayUpdater [2018-10-12 22:28:26,262 INFO L282 apSepIcfgTransformer]: finished preprocessing for the equality analysis [2018-10-12 22:28:26,330 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=1) [2018-10-12 22:29:05,020 INFO L315 AbstractInterpreter]: Visited 61 different actions 94 times. Merged at 14 different actions 31 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-10-12 22:29:05,025 INFO L306 apSepIcfgTransformer]: finished equality analysis [2018-10-12 22:29:05,028 INFO L318 apSepIcfgTransformer]: Finished detection of select terms ("array reads") [2018-10-12 22:29:05,099 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;) [2018-10-12 22:29:05,151 INFO L232 HeapPartitionManager]: partitioning result: [2018-10-12 22:29:05,152 INFO L237 HeapPartitionManager]: location blocks for array group [#memory_int, ULTIMATE.start_write~int_old_#memory_int] [2018-10-12 22:29:05,152 INFO L246 HeapPartitionManager]: at dimension 1 [2018-10-12 22:29:05,152 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 3 [2018-10-12 22:29:05,152 INFO L248 HeapPartitionManager]: # location blocks :2 [2018-10-12 22:29:05,153 INFO L246 HeapPartitionManager]: at dimension 2 [2018-10-12 22:29:05,153 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 0 [2018-10-12 22:29:05,153 INFO L248 HeapPartitionManager]: # location blocks :0 [2018-10-12 22:29:05,153 INFO L237 HeapPartitionManager]: location blocks for array group [#memory_int, ULTIMATE.start_write~int_old_#memory_int] [2018-10-12 22:29:05,154 INFO L246 HeapPartitionManager]: at dimension 1 [2018-10-12 22:29:05,154 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 3 [2018-10-12 22:29:05,154 INFO L248 HeapPartitionManager]: # location blocks :2 [2018-10-12 22:29:05,154 INFO L246 HeapPartitionManager]: at dimension 2 [2018-10-12 22:29:05,154 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 0 [2018-10-12 22:29:05,155 INFO L248 HeapPartitionManager]: # location blocks :0 [2018-10-12 22:29:05,156 INFO L145 ransitionTransformer]: executing heap partitioning transformation [2018-10-12 22:29:05,174 INFO L202 PluginConnector]: Adding new model 960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 12.10 10:29:05 BasicIcfg [2018-10-12 22:29:05,174 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2018-10-12 22:29:05,178 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-12 22:29:05,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-12 22:29:05,182 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-12 22:29:05,182 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 12.10 10:28:25" (1/3) ... [2018-10-12 22:29:05,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efd5a01 and model type 960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:29:05, skipping insertion in model container [2018-10-12 22:29:05,187 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 12.10 10:28:26" (2/3) ... [2018-10-12 22:29:05,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efd5a01 and model type 960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 10:29:05, skipping insertion in model container [2018-10-12 22:29:05,188 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 12.10 10:29:05" (3/3) ... [2018-10-12 22:29:05,191 INFO L112 eAbstractionObserver]: Analyzing ICFG memPartitionedIcfg [2018-10-12 22:29:05,211 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-10-12 22:29:05,221 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-12 22:29:05,240 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-12 22:29:05,267 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-12 22:29:05,268 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-12 22:29:05,268 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-12 22:29:05,268 INFO L384 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-10-12 22:29:05,272 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-12 22:29:05,272 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-12 22:29:05,273 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-12 22:29:05,273 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-12 22:29:05,273 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-12 22:29:05,292 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2018-10-12 22:29:05,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-12 22:29:05,308 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:29:05,310 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] [2018-10-12 22:29:05,312 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:29:05,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:29:05,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1565987991, now seen corresponding path program 1 times [2018-10-12 22:29:05,371 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:29:05,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:29:06,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:29:06,654 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-12 22:29:06,655 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2018-10-12 22:29:06,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-12 22:29:06,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-12 22:29:06,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-10-12 22:29:06,675 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 14 states. [2018-10-12 22:29:07,428 WARN L178 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-10-12 22:29:08,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:29:08,193 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-12 22:29:08,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-12 22:29:08,195 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2018-10-12 22:29:08,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:29:08,208 INFO L225 Difference]: With dead ends: 74 [2018-10-12 22:29:08,208 INFO L226 Difference]: Without dead ends: 74 [2018-10-12 22:29:08,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2018-10-12 22:29:08,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-12 22:29:08,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2018-10-12 22:29:08,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-12 22:29:08,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-12 22:29:08,254 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 51 [2018-10-12 22:29:08,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:29:08,255 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-12 22:29:08,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-12 22:29:08,256 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-12 22:29:08,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-12 22:29:08,259 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:29:08,259 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] [2018-10-12 22:29:08,260 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:29:08,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:29:08,260 INFO L82 PathProgramCache]: Analyzing trace with hash -725690753, now seen corresponding path program 1 times [2018-10-12 22:29:08,261 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:29:08,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:29:08,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:29:08,992 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:29:08,992 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-12 22:29:08,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-12 22:29:08,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-12 22:29:08,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2018-10-12 22:29:08,995 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 17 states. [2018-10-12 22:29:10,508 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-12 22:29:10,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:29:10,667 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-12 22:29:10,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-12 22:29:10,674 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2018-10-12 22:29:10,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:29:10,676 INFO L225 Difference]: With dead ends: 86 [2018-10-12 22:29:10,676 INFO L226 Difference]: Without dead ends: 86 [2018-10-12 22:29:10,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=388, Invalid=1094, Unknown=0, NotChecked=0, Total=1482 [2018-10-12 22:29:10,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-12 22:29:10,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2018-10-12 22:29:10,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-12 22:29:10,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-12 22:29:10,688 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 63 [2018-10-12 22:29:10,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:29:10,688 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-12 22:29:10,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-12 22:29:10,689 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-12 22:29:10,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-12 22:29:10,690 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:29:10,690 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] [2018-10-12 22:29:10,693 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:29:10,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:29:10,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1481309287, now seen corresponding path program 2 times [2018-10-12 22:29:10,694 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:29:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:29:11,275 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:29:11,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:29:11,276 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-12 22:29:11,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-12 22:29:11,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-12 22:29:11,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2018-10-12 22:29:11,277 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 20 states. [2018-10-12 22:29:12,072 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2018-10-12 22:29:13,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:29:13,169 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-12 22:29:13,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-12 22:29:13,171 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2018-10-12 22:29:13,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:29:13,174 INFO L225 Difference]: With dead ends: 98 [2018-10-12 22:29:13,174 INFO L226 Difference]: Without dead ends: 98 [2018-10-12 22:29:13,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=471, Invalid=1509, Unknown=0, NotChecked=0, Total=1980 [2018-10-12 22:29:13,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-12 22:29:13,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2018-10-12 22:29:13,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-12 22:29:13,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-12 22:29:13,184 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 75 [2018-10-12 22:29:13,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:29:13,184 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-12 22:29:13,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-12 22:29:13,185 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-12 22:29:13,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-12 22:29:13,186 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:29:13,186 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] [2018-10-12 22:29:13,187 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:29:13,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:29:13,187 INFO L82 PathProgramCache]: Analyzing trace with hash 8750671, now seen corresponding path program 3 times [2018-10-12 22:29:13,188 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:29:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:29:13,974 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:29:13,974 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:29:13,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-12 22:29:13,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-12 22:29:13,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-12 22:29:13,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2018-10-12 22:29:13,976 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 22 states. [2018-10-12 22:29:16,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:29:16,634 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-12 22:29:16,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-12 22:29:16,635 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 87 [2018-10-12 22:29:16,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:29:16,638 INFO L225 Difference]: With dead ends: 110 [2018-10-12 22:29:16,639 INFO L226 Difference]: Without dead ends: 110 [2018-10-12 22:29:16,640 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 [2018-10-12 22:29:16,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-12 22:29:16,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2018-10-12 22:29:16,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-12 22:29:16,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-12 22:29:16,648 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 87 [2018-10-12 22:29:16,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:29:16,649 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-12 22:29:16,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-12 22:29:16,649 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-12 22:29:16,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-12 22:29:16,650 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:29:16,651 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] [2018-10-12 22:29:16,651 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:29:16,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:29:16,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1727558711, now seen corresponding path program 4 times [2018-10-12 22:29:16,652 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:29:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:29:17,202 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:29:17,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:29:17,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-12 22:29:17,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-12 22:29:17,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-12 22:29:17,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2018-10-12 22:29:17,204 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 24 states. [2018-10-12 22:29:19,767 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2018-10-12 22:29:20,151 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2018-10-12 22:29:20,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:29:20,248 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-10-12 22:29:20,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-12 22:29:20,249 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 99 [2018-10-12 22:29:20,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:29:20,251 INFO L225 Difference]: With dead ends: 122 [2018-10-12 22:29:20,251 INFO L226 Difference]: Without dead ends: 122 [2018-10-12 22:29:20,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=623, Invalid=2347, Unknown=0, NotChecked=0, Total=2970 [2018-10-12 22:29:20,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-12 22:29:20,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 112. [2018-10-12 22:29:20,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-12 22:29:20,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-12 22:29:20,261 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 99 [2018-10-12 22:29:20,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:29:20,261 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-12 22:29:20,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-12 22:29:20,262 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-12 22:29:20,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-12 22:29:20,263 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:29:20,263 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] [2018-10-12 22:29:20,264 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:29:20,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:29:20,264 INFO L82 PathProgramCache]: Analyzing trace with hash 640534047, now seen corresponding path program 5 times [2018-10-12 22:29:20,265 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:29:20,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:29:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:29:21,050 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:29:21,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-12 22:29:21,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-12 22:29:21,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-12 22:29:21,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2018-10-12 22:29:21,052 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 28 states. [2018-10-12 22:29:22,717 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-12 22:29:22,868 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:29:23,392 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:29:23,805 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:29:23,968 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2018-10-12 22:29:24,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:29:24,666 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-10-12 22:29:24,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-12 22:29:24,669 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 111 [2018-10-12 22:29:24,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:29:24,671 INFO L225 Difference]: With dead ends: 134 [2018-10-12 22:29:24,671 INFO L226 Difference]: Without dead ends: 134 [2018-10-12 22:29:24,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1004, Invalid=3156, Unknown=0, NotChecked=0, Total=4160 [2018-10-12 22:29:24,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-12 22:29:24,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 124. [2018-10-12 22:29:24,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-12 22:29:24,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-10-12 22:29:24,681 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 111 [2018-10-12 22:29:24,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:29:24,681 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-10-12 22:29:24,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-12 22:29:24,682 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-10-12 22:29:24,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-12 22:29:24,683 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:29:24,684 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] [2018-10-12 22:29:24,684 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:29:24,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:29:24,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1504672775, now seen corresponding path program 6 times [2018-10-12 22:29:24,685 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:29:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:29:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:29:25,434 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:29:25,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-10-12 22:29:25,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-12 22:29:25,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-12 22:29:25,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2018-10-12 22:29:25,435 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 30 states. [2018-10-12 22:29:27,783 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-12 22:29:28,011 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:29:28,477 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:29:28,869 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2018-10-12 22:29:29,050 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-12 22:29:29,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:29:29,833 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-10-12 22:29:29,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-12 22:29:29,834 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 123 [2018-10-12 22:29:29,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:29:29,836 INFO L225 Difference]: With dead ends: 146 [2018-10-12 22:29:29,836 INFO L226 Difference]: Without dead ends: 146 [2018-10-12 22:29:29,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1064, Invalid=3628, Unknown=0, NotChecked=0, Total=4692 [2018-10-12 22:29:29,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-12 22:29:29,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 136. [2018-10-12 22:29:29,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-12 22:29:29,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-10-12 22:29:29,844 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 123 [2018-10-12 22:29:29,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:29:29,845 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-10-12 22:29:29,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-12 22:29:29,845 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-10-12 22:29:29,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-12 22:29:29,847 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:29:29,847 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] [2018-10-12 22:29:29,847 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:29:29,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:29:29,848 INFO L82 PathProgramCache]: Analyzing trace with hash 503813615, now seen corresponding path program 7 times [2018-10-12 22:29:29,848 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:29:29,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:29:30,753 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-12 22:29:31,688 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:29:31,688 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:29:31,688 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-12 22:29:31,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-12 22:29:31,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-12 22:29:31,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2018-10-12 22:29:31,690 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 32 states. [2018-10-12 22:29:32,363 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-12 22:29:34,155 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:29:37,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:29:37,084 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-10-12 22:29:37,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-12 22:29:37,085 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 135 [2018-10-12 22:29:37,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:29:37,086 INFO L225 Difference]: With dead ends: 158 [2018-10-12 22:29:37,086 INFO L226 Difference]: Without dead ends: 158 [2018-10-12 22:29:37,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1413, Invalid=4439, Unknown=0, NotChecked=0, Total=5852 [2018-10-12 22:29:37,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-12 22:29:37,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2018-10-12 22:29:37,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-12 22:29:37,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-12 22:29:37,096 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 135 [2018-10-12 22:29:37,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:29:37,096 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-12 22:29:37,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-12 22:29:37,097 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-12 22:29:37,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-12 22:29:37,098 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:29:37,099 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] [2018-10-12 22:29:37,099 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:29:37,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:29:37,099 INFO L82 PathProgramCache]: Analyzing trace with hash 281023447, now seen corresponding path program 8 times [2018-10-12 22:29:37,100 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:29:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:29:38,134 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:29:38,135 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:29:38,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-12 22:29:38,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-12 22:29:38,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-12 22:29:38,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2018-10-12 22:29:38,136 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 32 states. [2018-10-12 22:29:43,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:29:43,610 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2018-10-12 22:29:43,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-12 22:29:43,610 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 147 [2018-10-12 22:29:43,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:29:43,611 INFO L225 Difference]: With dead ends: 170 [2018-10-12 22:29:43,611 INFO L226 Difference]: Without dead ends: 170 [2018-10-12 22:29:43,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=927, Invalid=4623, Unknown=0, NotChecked=0, Total=5550 [2018-10-12 22:29:43,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-12 22:29:43,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2018-10-12 22:29:43,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-12 22:29:43,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-10-12 22:29:43,618 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 147 [2018-10-12 22:29:43,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:29:43,619 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-10-12 22:29:43,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-12 22:29:43,619 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-10-12 22:29:43,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-12 22:29:43,621 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:29:43,621 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] [2018-10-12 22:29:43,621 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:29:43,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:29:43,622 INFO L82 PathProgramCache]: Analyzing trace with hash -798820929, now seen corresponding path program 9 times [2018-10-12 22:29:43,622 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:29:43,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:29:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:29:44,761 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:29:44,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-10-12 22:29:44,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-12 22:29:44,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-12 22:29:44,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2018-10-12 22:29:44,763 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 36 states. [2018-10-12 22:29:48,048 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-12 22:29:48,768 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:29:49,332 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:29:49,533 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:29:50,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:29:50,951 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2018-10-12 22:29:50,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-12 22:29:50,952 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 159 [2018-10-12 22:29:50,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:29:50,953 INFO L225 Difference]: With dead ends: 182 [2018-10-12 22:29:50,953 INFO L226 Difference]: Without dead ends: 182 [2018-10-12 22:29:50,955 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 [2018-10-12 22:29:50,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-12 22:29:50,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 172. [2018-10-12 22:29:50,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-10-12 22:29:50,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2018-10-12 22:29:50,958 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 159 [2018-10-12 22:29:50,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:29:50,959 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2018-10-12 22:29:50,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-12 22:29:50,959 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2018-10-12 22:29:50,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-12 22:29:50,969 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:29:50,970 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] [2018-10-12 22:29:50,970 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:29:50,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:29:50,970 INFO L82 PathProgramCache]: Analyzing trace with hash 2088385447, now seen corresponding path program 10 times [2018-10-12 22:29:50,971 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:29:50,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:29:52,370 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:29:52,371 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:29:52,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-12 22:29:52,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-12 22:29:52,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-12 22:29:52,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2018-10-12 22:29:52,373 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 38 states. [2018-10-12 22:29:54,890 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-12 22:29:55,036 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:29:55,467 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:29:55,615 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:29:56,017 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:29:56,169 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:29:56,656 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:29:56,809 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:29:57,265 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:29:57,431 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:29:57,864 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:29:58,029 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-12 22:29:58,463 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-12 22:29:59,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:29:59,384 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2018-10-12 22:29:59,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-12 22:29:59,385 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 171 [2018-10-12 22:29:59,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:29:59,387 INFO L225 Difference]: With dead ends: 194 [2018-10-12 22:29:59,387 INFO L226 Difference]: Without dead ends: 194 [2018-10-12 22:29:59,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1966, Invalid=6590, Unknown=0, NotChecked=0, Total=8556 [2018-10-12 22:29:59,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-12 22:29:59,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 184. [2018-10-12 22:29:59,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-12 22:29:59,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2018-10-12 22:29:59,395 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 171 [2018-10-12 22:29:59,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:29:59,395 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2018-10-12 22:29:59,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-12 22:29:59,395 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2018-10-12 22:29:59,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-12 22:29:59,397 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:29:59,397 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] [2018-10-12 22:29:59,397 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:29:59,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:29:59,397 INFO L82 PathProgramCache]: Analyzing trace with hash 898622863, now seen corresponding path program 11 times [2018-10-12 22:29:59,398 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:29:59,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:30:00,635 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:30:00,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:30:00,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-12 22:30:00,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-12 22:30:00,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-12 22:30:00,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1349, Unknown=0, NotChecked=0, Total=1560 [2018-10-12 22:30:00,637 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand 40 states. [2018-10-12 22:30:04,152 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:30:04,774 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:30:04,971 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:30:05,266 WARN L178 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-12 22:30:08,497 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2018-10-12 22:30:08,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:30:08,526 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2018-10-12 22:30:08,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-12 22:30:08,527 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 183 [2018-10-12 22:30:08,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:30:08,529 INFO L225 Difference]: With dead ends: 206 [2018-10-12 22:30:08,529 INFO L226 Difference]: Without dead ends: 206 [2018-10-12 22:30:08,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=2435, Invalid=7665, Unknown=0, NotChecked=0, Total=10100 [2018-10-12 22:30:08,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-10-12 22:30:08,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 196. [2018-10-12 22:30:08,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-12 22:30:08,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2018-10-12 22:30:08,534 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 183 [2018-10-12 22:30:08,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:30:08,535 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2018-10-12 22:30:08,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-12 22:30:08,535 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2018-10-12 22:30:08,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-10-12 22:30:08,536 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:30:08,536 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] [2018-10-12 22:30:08,536 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:30:08,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:30:08,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1657932937, now seen corresponding path program 12 times [2018-10-12 22:30:08,538 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:30:08,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:30:09,703 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:30:09,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:30:09,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-10-12 22:30:09,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-12 22:30:09,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-12 22:30:09,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2018-10-12 22:30:09,705 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 42 states. [2018-10-12 22:30:13,150 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-12 22:30:13,300 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2018-10-12 22:30:13,827 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-12 22:30:14,016 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:30:14,526 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:30:14,713 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:30:14,861 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-12 22:30:15,048 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-12 22:30:15,264 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:30:15,448 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:30:15,940 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:30:16,131 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-12 22:30:16,610 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-12 22:30:16,793 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-12 22:30:17,131 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-12 22:30:17,302 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-12 22:30:17,623 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2018-10-12 22:30:18,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:30:18,530 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2018-10-12 22:30:18,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-12 22:30:18,531 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 195 [2018-10-12 22:30:18,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:30:18,532 INFO L225 Difference]: With dead ends: 218 [2018-10-12 22:30:18,532 INFO L226 Difference]: Without dead ends: 218 [2018-10-12 22:30:18,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2105 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=2185, Invalid=8321, Unknown=0, NotChecked=0, Total=10506 [2018-10-12 22:30:18,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-10-12 22:30:18,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 208. [2018-10-12 22:30:18,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-12 22:30:18,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2018-10-12 22:30:18,538 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 195 [2018-10-12 22:30:18,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:30:18,539 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2018-10-12 22:30:18,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-12 22:30:18,539 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2018-10-12 22:30:18,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-12 22:30:18,540 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:30:18,540 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] [2018-10-12 22:30:18,540 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:30:18,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:30:18,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1440638303, now seen corresponding path program 13 times [2018-10-12 22:30:18,541 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:30:18,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:30:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:30:20,553 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:30:20,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-12 22:30:20,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-12 22:30:20,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-12 22:30:20,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1625, Unknown=0, NotChecked=0, Total=1892 [2018-10-12 22:30:20,554 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 44 states. [2018-10-12 22:30:24,260 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:30:24,811 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:30:25,432 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:30:29,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:30:29,642 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2018-10-12 22:30:29,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-12 22:30:29,643 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 207 [2018-10-12 22:30:29,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:30:29,645 INFO L225 Difference]: With dead ends: 230 [2018-10-12 22:30:29,645 INFO L226 Difference]: Without dead ends: 230 [2018-10-12 22:30:29,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2716 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=3048, Invalid=9608, Unknown=0, NotChecked=0, Total=12656 [2018-10-12 22:30:29,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-10-12 22:30:29,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 220. [2018-10-12 22:30:29,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-12 22:30:29,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 220 transitions. [2018-10-12 22:30:29,651 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 220 transitions. Word has length 207 [2018-10-12 22:30:29,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:30:29,651 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 220 transitions. [2018-10-12 22:30:29,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-12 22:30:29,651 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 220 transitions. [2018-10-12 22:30:29,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-12 22:30:29,653 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:30:29,653 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] [2018-10-12 22:30:29,653 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:30:29,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:30:29,653 INFO L82 PathProgramCache]: Analyzing trace with hash -2094318777, now seen corresponding path program 14 times [2018-10-12 22:30:29,654 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:30:29,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:30:31,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:30:31,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:30:31,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-12 22:30:31,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-12 22:30:31,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-12 22:30:31,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1799, Unknown=0, NotChecked=0, Total=2070 [2018-10-12 22:30:31,124 INFO L87 Difference]: Start difference. First operand 220 states and 220 transitions. Second operand 46 states. [2018-10-12 22:30:33,789 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-12 22:30:33,930 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:30:34,383 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:30:34,526 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:30:34,935 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:30:35,088 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:30:35,574 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:30:35,762 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:30:36,200 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:30:36,363 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:30:36,813 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:30:36,988 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:30:37,446 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:30:37,637 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:30:38,123 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:30:38,301 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:30:38,811 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:30:39,002 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:30:39,510 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:30:39,707 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-12 22:30:40,199 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-12 22:30:40,815 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2018-10-12 22:30:41,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:30:41,312 INFO L93 Difference]: Finished difference Result 242 states and 242 transitions. [2018-10-12 22:30:41,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-12 22:30:41,313 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 219 [2018-10-12 22:30:41,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:30:41,314 INFO L225 Difference]: With dead ends: 242 [2018-10-12 22:30:41,314 INFO L226 Difference]: Without dead ends: 242 [2018-10-12 22:30:41,316 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 [2018-10-12 22:30:41,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-10-12 22:30:41,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 232. [2018-10-12 22:30:41,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-10-12 22:30:41,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2018-10-12 22:30:41,320 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 219 [2018-10-12 22:30:41,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:30:41,321 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2018-10-12 22:30:41,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-12 22:30:41,321 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2018-10-12 22:30:41,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-10-12 22:30:41,322 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:30:41,322 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] [2018-10-12 22:30:41,323 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:30:41,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:30:41,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1235121455, now seen corresponding path program 15 times [2018-10-12 22:30:41,324 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:30:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:30:42,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:30:42,775 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:30:42,775 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-12 22:30:42,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-12 22:30:42,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-12 22:30:42,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1925, Unknown=0, NotChecked=0, Total=2256 [2018-10-12 22:30:42,777 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand 48 states. [2018-10-12 22:30:44,611 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-12 22:30:45,147 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:30:45,685 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:30:45,867 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:30:46,336 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:30:49,254 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:30:50,753 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:30:50,989 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-12 22:30:53,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:30:53,221 INFO L93 Difference]: Finished difference Result 254 states and 254 transitions. [2018-10-12 22:30:53,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-12 22:30:53,221 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 231 [2018-10-12 22:30:53,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:30:53,224 INFO L225 Difference]: With dead ends: 254 [2018-10-12 22:30:53,224 INFO L226 Difference]: Without dead ends: 254 [2018-10-12 22:30:53,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3423 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=3729, Invalid=11771, Unknown=0, NotChecked=0, Total=15500 [2018-10-12 22:30:53,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-10-12 22:30:53,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 244. [2018-10-12 22:30:53,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-10-12 22:30:53,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 244 transitions. [2018-10-12 22:30:53,229 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 244 transitions. Word has length 231 [2018-10-12 22:30:53,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:30:53,230 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 244 transitions. [2018-10-12 22:30:53,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-12 22:30:53,230 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 244 transitions. [2018-10-12 22:30:53,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-12 22:30:53,232 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:30:53,232 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] [2018-10-12 22:30:53,232 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:30:53,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:30:53,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1321341719, now seen corresponding path program 16 times [2018-10-12 22:30:53,233 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:30:53,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:30:55,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:30:55,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:30:55,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-12 22:30:55,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-12 22:30:55,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-12 22:30:55,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2122, Unknown=0, NotChecked=0, Total=2256 [2018-10-12 22:30:55,015 INFO L87 Difference]: Start difference. First operand 244 states and 244 transitions. Second operand 48 states. [2018-10-12 22:31:06,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:31:06,395 INFO L93 Difference]: Finished difference Result 266 states and 266 transitions. [2018-10-12 22:31:06,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-12 22:31:06,396 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 243 [2018-10-12 22:31:06,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:31:06,397 INFO L225 Difference]: With dead ends: 266 [2018-10-12 22:31:06,397 INFO L226 Difference]: Without dead ends: 266 [2018-10-12 22:31:06,399 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 [2018-10-12 22:31:06,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-10-12 22:31:06,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 256. [2018-10-12 22:31:06,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-10-12 22:31:06,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 256 transitions. [2018-10-12 22:31:06,403 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 256 transitions. Word has length 243 [2018-10-12 22:31:06,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:31:06,404 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 256 transitions. [2018-10-12 22:31:06,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-12 22:31:06,404 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 256 transitions. [2018-10-12 22:31:06,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-10-12 22:31:06,405 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:31:06,406 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] [2018-10-12 22:31:06,406 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:31:06,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:31:06,406 INFO L82 PathProgramCache]: Analyzing trace with hash 958403839, now seen corresponding path program 17 times [2018-10-12 22:31:06,407 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:31:06,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:31:07,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:31:07,998 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:31:07,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-10-12 22:31:07,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-12 22:31:07,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-12 22:31:07,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=2249, Unknown=0, NotChecked=0, Total=2652 [2018-10-12 22:31:08,000 INFO L87 Difference]: Start difference. First operand 256 states and 256 transitions. Second operand 52 states. [2018-10-12 22:31:11,245 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:31:12,777 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:31:13,901 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:31:16,372 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:31:16,602 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:31:18,447 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:31:21,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:31:21,167 INFO L93 Difference]: Finished difference Result 278 states and 278 transitions. [2018-10-12 22:31:21,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-12 22:31:21,168 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 255 [2018-10-12 22:31:21,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:31:21,170 INFO L225 Difference]: With dead ends: 278 [2018-10-12 22:31:21,170 INFO L226 Difference]: Without dead ends: 278 [2018-10-12 22:31:21,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4214 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=4478, Invalid=14154, Unknown=0, NotChecked=0, Total=18632 [2018-10-12 22:31:21,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-10-12 22:31:21,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 268. [2018-10-12 22:31:21,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-10-12 22:31:21,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 268 transitions. [2018-10-12 22:31:21,176 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 268 transitions. Word has length 255 [2018-10-12 22:31:21,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:31:21,177 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 268 transitions. [2018-10-12 22:31:21,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-12 22:31:21,177 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 268 transitions. [2018-10-12 22:31:21,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-10-12 22:31:21,178 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:31:21,179 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] [2018-10-12 22:31:21,179 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:31:21,179 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:31:21,179 INFO L82 PathProgramCache]: Analyzing trace with hash 809663207, now seen corresponding path program 18 times [2018-10-12 22:31:21,180 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:31:21,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:31:22,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:31:22,975 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:31:22,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-10-12 22:31:22,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-12 22:31:22,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-12 22:31:22,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2455, Unknown=0, NotChecked=0, Total=2862 [2018-10-12 22:31:22,977 INFO L87 Difference]: Start difference. First operand 268 states and 268 transitions. Second operand 54 states. [2018-10-12 22:31:25,977 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-12 22:31:26,117 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:31:26,615 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:31:26,784 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:31:27,229 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:31:27,380 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:31:27,808 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:31:28,389 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:31:28,547 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:31:28,993 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:31:30,255 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:31:30,916 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:31:31,101 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:31:31,601 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:31:31,845 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:31:32,383 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:31:32,576 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:31:33,080 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:31:33,810 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:31:34,026 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:31:34,565 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:31:35,303 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-12 22:31:35,534 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2018-10-12 22:31:36,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:31:36,476 INFO L93 Difference]: Finished difference Result 290 states and 290 transitions. [2018-10-12 22:31:36,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-12 22:31:36,477 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 267 [2018-10-12 22:31:36,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:31:36,479 INFO L225 Difference]: With dead ends: 290 [2018-10-12 22:31:36,479 INFO L226 Difference]: Without dead ends: 290 [2018-10-12 22:31:36,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4448 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=4586, Invalid=15154, Unknown=0, NotChecked=0, Total=19740 [2018-10-12 22:31:36,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-10-12 22:31:36,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 280. [2018-10-12 22:31:36,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-10-12 22:31:36,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 280 transitions. [2018-10-12 22:31:36,486 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 280 transitions. Word has length 267 [2018-10-12 22:31:36,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:31:36,487 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 280 transitions. [2018-10-12 22:31:36,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-12 22:31:36,487 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 280 transitions. [2018-10-12 22:31:36,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-10-12 22:31:36,488 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:31:36,489 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] [2018-10-12 22:31:36,489 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:31:36,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:31:36,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1555252431, now seen corresponding path program 19 times [2018-10-12 22:31:36,490 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:31:36,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:31:38,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:31:38,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:31:38,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-10-12 22:31:38,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-12 22:31:38,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-12 22:31:38,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=2597, Unknown=0, NotChecked=0, Total=3080 [2018-10-12 22:31:38,412 INFO L87 Difference]: Start difference. First operand 280 states and 280 transitions. Second operand 56 states. [2018-10-12 22:31:40,890 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-12 22:31:41,992 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:31:42,161 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:31:44,729 WARN L178 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-12 22:31:52,487 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2018-10-12 22:31:53,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:31:53,094 INFO L93 Difference]: Finished difference Result 302 states and 302 transitions. [2018-10-12 22:31:53,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-12 22:31:53,094 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 279 [2018-10-12 22:31:53,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:31:53,096 INFO L225 Difference]: With dead ends: 302 [2018-10-12 22:31:53,096 INFO L226 Difference]: Without dead ends: 302 [2018-10-12 22:31:53,097 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5089 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=5295, Invalid=16757, Unknown=0, NotChecked=0, Total=22052 [2018-10-12 22:31:53,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2018-10-12 22:31:53,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 292. [2018-10-12 22:31:53,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-10-12 22:31:53,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 292 transitions. [2018-10-12 22:31:53,102 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 292 transitions. Word has length 279 [2018-10-12 22:31:53,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:31:53,102 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 292 transitions. [2018-10-12 22:31:53,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-12 22:31:53,103 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 292 transitions. [2018-10-12 22:31:53,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-10-12 22:31:53,104 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:31:53,105 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] [2018-10-12 22:31:53,105 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:31:53,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:31:53,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1744597687, now seen corresponding path program 20 times [2018-10-12 22:31:53,106 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:31:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:31:55,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:31:55,321 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:31:55,321 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-10-12 22:31:55,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-12 22:31:55,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-12 22:31:55,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=2891, Unknown=0, NotChecked=0, Total=3306 [2018-10-12 22:31:55,323 INFO L87 Difference]: Start difference. First operand 292 states and 292 transitions. Second operand 58 states. [2018-10-12 22:31:59,364 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2018-10-12 22:31:59,933 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-12 22:32:00,111 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:32:00,635 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:32:00,813 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:32:01,280 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:32:01,466 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:32:01,948 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:32:02,134 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:32:02,460 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-12 22:32:02,701 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:32:02,917 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:32:03,438 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:32:03,644 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:32:04,193 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:32:04,400 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:32:04,933 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:32:05,147 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:32:05,697 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:32:05,934 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:32:06,515 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:32:06,756 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:32:07,323 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:32:07,597 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:32:07,845 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-12 22:32:08,266 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:32:08,499 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-12 22:32:09,090 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-12 22:32:09,331 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-12 22:32:09,776 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-12 22:32:09,999 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-12 22:32:10,417 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2018-10-12 22:32:11,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:32:11,614 INFO L93 Difference]: Finished difference Result 314 states and 314 transitions. [2018-10-12 22:32:11,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-12 22:32:11,615 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 291 [2018-10-12 22:32:11,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:32:11,616 INFO L225 Difference]: With dead ends: 314 [2018-10-12 22:32:11,617 INFO L226 Difference]: Without dead ends: 314 [2018-10-12 22:32:11,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5093 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=4885, Invalid=17765, Unknown=0, NotChecked=0, Total=22650 [2018-10-12 22:32:11,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2018-10-12 22:32:11,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 304. [2018-10-12 22:32:11,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-10-12 22:32:11,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 304 transitions. [2018-10-12 22:32:11,623 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 304 transitions. Word has length 291 [2018-10-12 22:32:11,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:32:11,624 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 304 transitions. [2018-10-12 22:32:11,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-12 22:32:11,624 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 304 transitions. [2018-10-12 22:32:11,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-10-12 22:32:11,625 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:32:11,626 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] [2018-10-12 22:32:11,626 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:32:11,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:32:11,626 INFO L82 PathProgramCache]: Analyzing trace with hash -56097633, now seen corresponding path program 21 times [2018-10-12 22:32:11,627 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:32:11,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:32:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:32:14,446 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:32:14,446 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-10-12 22:32:14,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-12 22:32:14,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-12 22:32:14,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=2969, Unknown=0, NotChecked=0, Total=3540 [2018-10-12 22:32:14,447 INFO L87 Difference]: Start difference. First operand 304 states and 304 transitions. Second operand 60 states. [2018-10-12 22:32:17,764 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:32:21,159 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:32:23,201 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:32:28,167 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-12 22:32:28,423 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:32:29,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:32:29,786 INFO L93 Difference]: Finished difference Result 326 states and 326 transitions. [2018-10-12 22:32:29,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-12 22:32:29,787 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 303 [2018-10-12 22:32:29,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:32:29,789 INFO L225 Difference]: With dead ends: 326 [2018-10-12 22:32:29,789 INFO L226 Difference]: Without dead ends: 326 [2018-10-12 22:32:29,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6048 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=6180, Invalid=19580, Unknown=0, NotChecked=0, Total=25760 [2018-10-12 22:32:29,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2018-10-12 22:32:29,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 316. [2018-10-12 22:32:29,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-10-12 22:32:29,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 316 transitions. [2018-10-12 22:32:29,795 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 316 transitions. Word has length 303 [2018-10-12 22:32:29,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:32:29,795 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 316 transitions. [2018-10-12 22:32:29,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-12 22:32:29,795 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 316 transitions. [2018-10-12 22:32:29,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-10-12 22:32:29,797 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:32:29,797 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] [2018-10-12 22:32:29,797 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:32:29,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:32:29,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1178598023, now seen corresponding path program 22 times [2018-10-12 22:32:29,798 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:32:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:32:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:32:32,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:32:32,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-10-12 22:32:32,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-12 22:32:32,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-12 22:32:32,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=3207, Unknown=0, NotChecked=0, Total=3782 [2018-10-12 22:32:32,824 INFO L87 Difference]: Start difference. First operand 316 states and 316 transitions. Second operand 62 states. [2018-10-12 22:32:36,561 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:32:36,982 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:37,141 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:32:37,592 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:37,752 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:32:38,213 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:38,423 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:32:38,885 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:39,049 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:32:39,545 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:40,193 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:40,382 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:32:40,883 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:41,072 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:32:41,585 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:41,782 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:32:42,289 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:43,003 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:43,202 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:32:43,398 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-12 22:32:43,645 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-12 22:32:43,865 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:44,631 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:45,416 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:46,221 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:46,454 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:32:47,041 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:47,287 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:32:47,889 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:48,125 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-12 22:32:48,509 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2018-10-12 22:32:48,777 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-12 22:32:50,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:32:50,096 INFO L93 Difference]: Finished difference Result 338 states and 338 transitions. [2018-10-12 22:32:50,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-12 22:32:50,096 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 315 [2018-10-12 22:32:50,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:32:50,098 INFO L225 Difference]: With dead ends: 338 [2018-10-12 22:32:50,098 INFO L226 Difference]: Without dead ends: 338 [2018-10-12 22:32:50,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6326 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=6304, Invalid=20756, Unknown=0, NotChecked=0, Total=27060 [2018-10-12 22:32:50,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-10-12 22:32:50,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 328. [2018-10-12 22:32:50,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-10-12 22:32:50,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 328 transitions. [2018-10-12 22:32:50,104 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 328 transitions. Word has length 315 [2018-10-12 22:32:50,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:32:50,104 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 328 transitions. [2018-10-12 22:32:50,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-12 22:32:50,105 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 328 transitions. [2018-10-12 22:32:50,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-10-12 22:32:50,106 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:32:50,106 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] [2018-10-12 22:32:50,106 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:32:50,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:32:50,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1900958831, now seen corresponding path program 23 times [2018-10-12 22:32:50,107 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:32:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:32:52,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:32:52,370 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:32:52,370 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-10-12 22:32:52,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-12 22:32:52,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-12 22:32:52,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=667, Invalid=3365, Unknown=0, NotChecked=0, Total=4032 [2018-10-12 22:32:52,371 INFO L87 Difference]: Start difference. First operand 328 states and 328 transitions. Second operand 64 states. [2018-10-12 22:32:58,817 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:33:00,127 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:33:00,598 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:33:04,166 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:33:09,000 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2018-10-12 22:33:10,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:33:10,386 INFO L93 Difference]: Finished difference Result 350 states and 350 transitions. [2018-10-12 22:33:10,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-10-12 22:33:10,387 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 327 [2018-10-12 22:33:10,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:33:10,389 INFO L225 Difference]: With dead ends: 350 [2018-10-12 22:33:10,389 INFO L226 Difference]: Without dead ends: 350 [2018-10-12 22:33:10,392 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 [2018-10-12 22:33:10,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2018-10-12 22:33:10,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 340. [2018-10-12 22:33:10,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-10-12 22:33:10,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 340 transitions. [2018-10-12 22:33:10,397 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 340 transitions. Word has length 327 [2018-10-12 22:33:10,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:33:10,397 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 340 transitions. [2018-10-12 22:33:10,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-12 22:33:10,397 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 340 transitions. [2018-10-12 22:33:10,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-10-12 22:33:10,399 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:33:10,400 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] [2018-10-12 22:33:10,400 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:33:10,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:33:10,400 INFO L82 PathProgramCache]: Analyzing trace with hash 727519831, now seen corresponding path program 24 times [2018-10-12 22:33:10,401 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:33:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:33:13,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:33:13,076 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:33:13,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-10-12 22:33:13,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-12 22:33:13,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-12 22:33:13,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=3859, Unknown=0, NotChecked=0, Total=4290 [2018-10-12 22:33:13,077 INFO L87 Difference]: Start difference. First operand 340 states and 340 transitions. Second operand 66 states. [2018-10-12 22:33:16,889 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-12 22:33:17,058 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2018-10-12 22:33:17,634 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2018-10-12 22:33:17,825 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 49 [2018-10-12 22:33:18,428 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 49 [2018-10-12 22:33:18,619 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 49 [2018-10-12 22:33:19,240 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 49 [2018-10-12 22:33:19,481 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 49 [2018-10-12 22:33:20,100 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 49 [2018-10-12 22:33:20,318 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 49 [2018-10-12 22:33:20,672 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 49 [2018-10-12 22:33:20,986 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 56 [2018-10-12 22:33:21,237 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-12 22:33:21,422 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-12 22:33:21,646 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-12 22:33:21,891 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-12 22:33:22,133 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-12 22:33:22,312 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-12 22:33:22,499 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-12 22:33:22,753 WARN L178 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-12 22:33:23,014 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-12 22:33:23,214 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-12 22:33:23,415 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-12 22:33:23,693 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-12 22:33:23,964 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-12 22:33:24,156 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-12 22:33:24,388 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-12 22:33:24,672 WARN L178 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-12 22:33:24,957 WARN L178 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-12 22:33:25,162 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-12 22:33:25,367 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-12 22:33:25,636 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-12 22:33:25,935 WARN L178 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-12 22:33:26,148 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-12 22:33:26,359 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-12 22:33:26,636 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-12 22:33:26,921 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-12 22:33:27,129 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-12 22:33:27,332 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-12 22:33:27,614 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-12 22:33:27,910 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 58 [2018-10-12 22:33:28,115 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2018-10-12 22:33:28,314 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2018-10-12 22:33:28,595 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 57 [2018-10-12 22:33:28,886 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 58 [2018-10-12 22:33:29,103 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2018-10-12 22:33:29,406 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 57 [2018-10-12 22:33:29,776 WARN L178 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 58 [2018-10-12 22:33:30,261 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 57 [2018-10-12 22:33:30,526 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2018-10-12 22:33:31,018 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2018-10-12 22:33:31,277 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2018-10-12 22:33:31,726 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2018-10-12 22:33:31,971 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2018-10-12 22:33:32,418 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2018-10-12 22:33:32,668 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2018-10-12 22:33:34,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:33:34,311 INFO L93 Difference]: Finished difference Result 362 states and 362 transitions. [2018-10-12 22:33:34,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-12 22:33:34,312 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 339 [2018-10-12 22:33:34,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:33:34,313 INFO L225 Difference]: With dead ends: 362 [2018-10-12 22:33:34,313 INFO L226 Difference]: Without dead ends: 362 [2018-10-12 22:33:34,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6491 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=5471, Invalid=23599, Unknown=0, NotChecked=0, Total=29070 [2018-10-12 22:33:34,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2018-10-12 22:33:34,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 352. [2018-10-12 22:33:34,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-10-12 22:33:34,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 352 transitions. [2018-10-12 22:33:34,318 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 352 transitions. Word has length 339 [2018-10-12 22:33:34,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:33:34,318 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 352 transitions. [2018-10-12 22:33:34,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-12 22:33:34,319 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 352 transitions. [2018-10-12 22:33:34,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-10-12 22:33:34,320 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:33:34,321 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] [2018-10-12 22:33:34,321 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:33:34,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:33:34,321 INFO L82 PathProgramCache]: Analyzing trace with hash 586560575, now seen corresponding path program 25 times [2018-10-12 22:33:34,322 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:33:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:33:34,907 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-12 22:33:37,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:33:37,360 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:33:37,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-10-12 22:33:37,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-12 22:33:37,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-12 22:33:37,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=771, Invalid=3785, Unknown=0, NotChecked=0, Total=4556 [2018-10-12 22:33:37,364 INFO L87 Difference]: Start difference. First operand 352 states and 352 transitions. Second operand 68 states. [2018-10-12 22:33:45,113 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:33:45,778 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:33:46,462 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:33:47,160 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:33:50,056 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:33:55,166 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:33:57,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:33:57,423 INFO L93 Difference]: Finished difference Result 374 states and 374 transitions. [2018-10-12 22:33:57,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-10-12 22:33:57,423 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 351 [2018-10-12 22:33:57,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:33:57,426 INFO L225 Difference]: With dead ends: 374 [2018-10-12 22:33:57,426 INFO L226 Difference]: Without dead ends: 374 [2018-10-12 22:33:57,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8218 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=8154, Invalid=25886, Unknown=0, NotChecked=0, Total=34040 [2018-10-12 22:33:57,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2018-10-12 22:33:57,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 364. [2018-10-12 22:33:57,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-10-12 22:33:57,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 364 transitions. [2018-10-12 22:33:57,435 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 364 transitions. Word has length 351 [2018-10-12 22:33:57,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:33:57,436 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 364 transitions. [2018-10-12 22:33:57,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-12 22:33:57,436 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 364 transitions. [2018-10-12 22:33:57,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-10-12 22:33:57,438 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:33:57,439 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] [2018-10-12 22:33:57,439 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:33:57,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:33:57,439 INFO L82 PathProgramCache]: Analyzing trace with hash -2019313113, now seen corresponding path program 26 times [2018-10-12 22:33:57,440 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:33:57,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:34:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:34:00,104 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:34:00,105 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-10-12 22:34:00,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-12 22:34:00,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-12 22:34:00,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=775, Invalid=4055, Unknown=0, NotChecked=0, Total=4830 [2018-10-12 22:34:00,106 INFO L87 Difference]: Start difference. First operand 364 states and 364 transitions. Second operand 70 states. [2018-10-12 22:34:03,224 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:03,365 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:03,806 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:04,399 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:04,555 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:05,013 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:05,179 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:05,359 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-12 22:34:05,563 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-12 22:34:06,374 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:06,558 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:07,064 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:07,251 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:07,768 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:07,958 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:08,483 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:08,685 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:09,190 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:09,385 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:09,899 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:10,107 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:10,504 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-12 22:34:10,750 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:10,964 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:11,528 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:11,753 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:12,335 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:12,563 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:13,132 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:13,930 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:14,776 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:15,031 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:15,697 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:15,995 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:16,628 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:16,883 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:17,500 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:18,383 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:19,292 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-12 22:34:20,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:34:20,821 INFO L93 Difference]: Finished difference Result 386 states and 386 transitions. [2018-10-12 22:34:20,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-10-12 22:34:20,821 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 363 [2018-10-12 22:34:20,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:34:20,823 INFO L225 Difference]: With dead ends: 386 [2018-10-12 22:34:20,823 INFO L226 Difference]: Without dead ends: 386 [2018-10-12 22:34:20,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8540 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=8294, Invalid=27238, Unknown=0, NotChecked=0, Total=35532 [2018-10-12 22:34:20,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2018-10-12 22:34:20,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 376. [2018-10-12 22:34:20,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2018-10-12 22:34:20,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 376 transitions. [2018-10-12 22:34:20,830 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 376 transitions. Word has length 363 [2018-10-12 22:34:20,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:34:20,831 INFO L481 AbstractCegarLoop]: Abstraction has 376 states and 376 transitions. [2018-10-12 22:34:20,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-12 22:34:20,831 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 376 transitions. [2018-10-12 22:34:20,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-10-12 22:34:20,833 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:34:20,833 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] [2018-10-12 22:34:20,834 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:34:20,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:34:20,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1980783601, now seen corresponding path program 27 times [2018-10-12 22:34:20,835 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:34:20,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:34:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:34:23,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:34:23,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-10-12 22:34:23,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-12 22:34:23,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-12 22:34:23,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=883, Invalid=4229, Unknown=0, NotChecked=0, Total=5112 [2018-10-12 22:34:23,494 INFO L87 Difference]: Start difference. First operand 376 states and 376 transitions. Second operand 72 states. [2018-10-12 22:34:25,894 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2018-10-12 22:34:26,597 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-12 22:34:36,160 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:34:36,991 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:34:41,157 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:34:41,448 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:34:45,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:34:45,398 INFO L93 Difference]: Finished difference Result 398 states and 398 transitions. [2018-10-12 22:34:45,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-12 22:34:45,398 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 375 [2018-10-12 22:34:45,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:34:45,400 INFO L225 Difference]: With dead ends: 398 [2018-10-12 22:34:45,400 INFO L226 Difference]: Without dead ends: 398 [2018-10-12 22:34:45,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9429 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=9243, Invalid=29369, Unknown=0, NotChecked=0, Total=38612 [2018-10-12 22:34:45,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2018-10-12 22:34:45,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 388. [2018-10-12 22:34:45,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-10-12 22:34:45,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 388 transitions. [2018-10-12 22:34:45,407 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 388 transitions. Word has length 375 [2018-10-12 22:34:45,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:34:45,407 INFO L481 AbstractCegarLoop]: Abstraction has 388 states and 388 transitions. [2018-10-12 22:34:45,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-12 22:34:45,407 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 388 transitions. [2018-10-12 22:34:45,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-10-12 22:34:45,409 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:34:45,410 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] [2018-10-12 22:34:45,410 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:34:45,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:34:45,410 INFO L82 PathProgramCache]: Analyzing trace with hash -614206985, now seen corresponding path program 28 times [2018-10-12 22:34:45,411 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:34:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:34:48,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:34:48,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:34:48,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-10-12 22:34:48,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-12 22:34:48,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-12 22:34:48,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=4619, Unknown=0, NotChecked=0, Total=5402 [2018-10-12 22:34:48,519 INFO L87 Difference]: Start difference. First operand 388 states and 388 transitions. Second operand 74 states. [2018-10-12 22:34:51,816 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-12 22:34:51,970 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2018-10-12 22:34:52,489 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-12 22:34:52,671 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:34:53,191 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:34:53,373 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:34:53,870 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:34:54,058 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:34:54,580 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:34:54,770 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:34:55,297 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:34:55,492 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:34:56,020 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:34:56,216 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:34:56,605 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-12 22:34:56,846 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:34:57,051 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:34:57,593 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:34:57,805 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:34:58,357 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:34:58,575 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:34:59,140 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:34:59,379 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:34:59,965 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:35:00,192 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:35:00,785 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:35:01,027 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:35:01,687 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:35:01,982 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:35:02,617 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:35:02,885 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:35:03,553 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:35:03,829 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:35:04,508 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:35:04,785 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:35:05,480 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:35:05,767 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:35:06,469 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:35:06,770 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:35:07,532 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:35:07,820 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:35:08,521 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:35:08,808 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-12 22:35:09,491 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-12 22:35:09,769 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-12 22:35:10,278 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-12 22:35:12,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:35:12,618 INFO L93 Difference]: Finished difference Result 410 states and 410 transitions. [2018-10-12 22:35:12,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-12 22:35:12,618 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 387 [2018-10-12 22:35:12,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:35:12,620 INFO L225 Difference]: With dead ends: 410 [2018-10-12 22:35:12,620 INFO L226 Difference]: Without dead ends: 410 [2018-10-12 22:35:12,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9425 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=8673, Invalid=30729, Unknown=0, NotChecked=0, Total=39402 [2018-10-12 22:35:12,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2018-10-12 22:35:12,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 400. [2018-10-12 22:35:12,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2018-10-12 22:35:12,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 400 transitions. [2018-10-12 22:35:12,628 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 400 transitions. Word has length 387 [2018-10-12 22:35:12,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:35:12,628 INFO L481 AbstractCegarLoop]: Abstraction has 400 states and 400 transitions. [2018-10-12 22:35:12,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-12 22:35:12,629 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 400 transitions. [2018-10-12 22:35:12,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-10-12 22:35:12,631 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:35:12,631 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] [2018-10-12 22:35:12,632 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:35:12,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:35:12,632 INFO L82 PathProgramCache]: Analyzing trace with hash 780837855, now seen corresponding path program 29 times [2018-10-12 22:35:12,633 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:35:12,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:35:15,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 5017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:35:15,548 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:35:15,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-10-12 22:35:15,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-12 22:35:15,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-12 22:35:15,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1003, Invalid=4697, Unknown=0, NotChecked=0, Total=5700 [2018-10-12 22:35:15,549 INFO L87 Difference]: Start difference. First operand 400 states and 400 transitions. Second operand 76 states. [2018-10-12 22:35:22,158 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:35:22,360 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:35:26,927 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:35:27,771 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:35:32,644 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:35:37,557 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-12 22:35:39,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:35:39,721 INFO L93 Difference]: Finished difference Result 422 states and 422 transitions. [2018-10-12 22:35:39,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-10-12 22:35:39,722 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 399 [2018-10-12 22:35:39,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:35:39,724 INFO L225 Difference]: With dead ends: 422 [2018-10-12 22:35:39,724 INFO L226 Difference]: Without dead ends: 422 [2018-10-12 22:35:39,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10724 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=10400, Invalid=33072, Unknown=0, NotChecked=0, Total=43472 [2018-10-12 22:35:39,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2018-10-12 22:35:39,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 412. [2018-10-12 22:35:39,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-10-12 22:35:39,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 412 transitions. [2018-10-12 22:35:39,733 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 412 transitions. Word has length 399 [2018-10-12 22:35:39,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:35:39,734 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 412 transitions. [2018-10-12 22:35:39,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-12 22:35:39,734 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 412 transitions. [2018-10-12 22:35:39,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-10-12 22:35:39,736 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:35:39,737 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] [2018-10-12 22:35:39,737 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:35:39,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:35:39,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1225934393, now seen corresponding path program 30 times [2018-10-12 22:35:39,738 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:35:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:35:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:35:43,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:35:43,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-10-12 22:35:43,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-12 22:35:43,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-12 22:35:43,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1007, Invalid=4999, Unknown=0, NotChecked=0, Total=6006 [2018-10-12 22:35:43,916 INFO L87 Difference]: Start difference. First operand 412 states and 412 transitions. Second operand 78 states. [2018-10-12 22:35:46,774 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-12 22:35:46,916 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:35:47,371 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:47,515 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:35:47,886 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-12 22:35:48,072 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:48,219 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:35:48,658 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:48,811 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:35:49,273 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:49,435 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:35:49,899 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:50,537 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:51,186 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:51,359 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:35:51,861 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:52,046 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:35:52,566 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:52,770 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:35:53,414 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:53,612 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:35:54,150 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:54,891 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:55,097 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:35:55,656 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:56,444 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:56,668 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:35:57,246 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:57,476 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:35:58,141 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:59,020 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:59,869 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:36:00,113 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:36:00,747 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:36:00,999 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:36:01,663 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:36:01,934 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:36:02,615 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:36:02,883 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:36:03,426 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-12 22:36:03,664 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:36:03,940 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:36:04,632 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:36:04,917 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:36:05,625 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:36:05,916 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:36:06,625 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:36:06,928 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-12 22:36:07,636 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-12 22:36:09,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:36:09,259 INFO L93 Difference]: Finished difference Result 434 states and 434 transitions. [2018-10-12 22:36:09,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-10-12 22:36:09,259 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 411 [2018-10-12 22:36:09,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:36:09,261 INFO L225 Difference]: With dead ends: 434 [2018-10-12 22:36:09,261 INFO L226 Difference]: Without dead ends: 434 [2018-10-12 22:36:09,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11090 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=10556, Invalid=34600, Unknown=0, NotChecked=0, Total=45156 [2018-10-12 22:36:09,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-10-12 22:36:09,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 424. [2018-10-12 22:36:09,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-10-12 22:36:09,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 424 transitions. [2018-10-12 22:36:09,268 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 424 transitions. Word has length 411 [2018-10-12 22:36:09,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:36:09,268 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 424 transitions. [2018-10-12 22:36:09,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-12 22:36:09,268 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 424 transitions. [2018-10-12 22:36:09,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-10-12 22:36:09,271 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:36:09,271 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] [2018-10-12 22:36:09,271 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:36:09,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:36:09,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1458097233, now seen corresponding path program 31 times [2018-10-12 22:36:09,272 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:36:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:36:12,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:36:12,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:36:12,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-12 22:36:12,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-12 22:36:12,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-12 22:36:12,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1131, Invalid=5189, Unknown=0, NotChecked=0, Total=6320 [2018-10-12 22:36:12,561 INFO L87 Difference]: Start difference. First operand 424 states and 424 transitions. Second operand 80 states. [2018-10-12 22:36:18,317 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:36:18,507 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:36:19,043 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:36:23,678 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:36:30,340 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:36:33,840 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:36:39,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:36:39,376 INFO L93 Difference]: Finished difference Result 446 states and 446 transitions. [2018-10-12 22:36:39,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-10-12 22:36:39,376 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 423 [2018-10-12 22:36:39,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:36:39,378 INFO L225 Difference]: With dead ends: 446 [2018-10-12 22:36:39,378 INFO L226 Difference]: Without dead ends: 446 [2018-10-12 22:36:39,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12103 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=11625, Invalid=36995, Unknown=0, NotChecked=0, Total=48620 [2018-10-12 22:36:39,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2018-10-12 22:36:39,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 436. [2018-10-12 22:36:39,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2018-10-12 22:36:39,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 436 transitions. [2018-10-12 22:36:39,386 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 436 transitions. Word has length 423 [2018-10-12 22:36:39,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:36:39,386 INFO L481 AbstractCegarLoop]: Abstraction has 436 states and 436 transitions. [2018-10-12 22:36:39,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-12 22:36:39,387 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 436 transitions. [2018-10-12 22:36:39,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-10-12 22:36:39,389 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:36:39,389 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] [2018-10-12 22:36:39,390 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:36:39,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:36:39,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1164897897, now seen corresponding path program 32 times [2018-10-12 22:36:39,391 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:36:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:36:45,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 0 proven. 6112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:36:45,312 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:36:45,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-12 22:36:45,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-12 22:36:45,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-12 22:36:45,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=6090, Unknown=0, NotChecked=0, Total=6320 [2018-10-12 22:36:45,315 INFO L87 Difference]: Start difference. First operand 436 states and 436 transitions. Second operand 80 states.