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/standard_strcpy_original_false-valid-deref.i_7.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-502d2f4 [2018-10-12 23:06:16,093 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-12 23:06:16,094 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-12 23:06:16,109 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-12 23:06:16,110 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-12 23:06:16,111 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-12 23:06:16,112 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-12 23:06:16,114 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-12 23:06:16,115 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-12 23:06:16,116 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-12 23:06:16,117 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-12 23:06:16,117 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-12 23:06:16,118 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-12 23:06:16,119 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-12 23:06:16,120 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-12 23:06:16,121 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-12 23:06:16,122 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-12 23:06:16,124 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-12 23:06:16,126 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-12 23:06:16,128 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-12 23:06:16,129 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-12 23:06:16,130 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-12 23:06:16,132 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-12 23:06:16,133 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-12 23:06:16,133 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-12 23:06:16,134 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-12 23:06:16,135 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-12 23:06:16,135 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-12 23:06:16,136 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-12 23:06:16,137 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-12 23:06:16,137 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-12 23:06:16,138 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-12 23:06:16,140 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 23:06:16,155 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-12 23:06:16,156 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-12 23:06:16,156 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-12 23:06:16,157 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-12 23:06:16,157 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-12 23:06:16,158 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-12 23:06:16,158 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-12 23:06:16,159 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-12 23:06:16,159 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-12 23:06:16,159 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-12 23:06:16,159 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-12 23:06:16,159 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-12 23:06:16,160 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-12 23:06:16,161 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-12 23:06:16,161 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-12 23:06:16,215 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-12 23:06:16,229 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-12 23:06:16,235 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-12 23:06:16,236 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-12 23:06:16,237 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-12 23:06:16,238 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/standard_strcpy_original_false-valid-deref.i_7.bpl [2018-10-12 23:06:16,238 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/standard_strcpy_original_false-valid-deref.i_7.bpl' [2018-10-12 23:06:16,313 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-12 23:06:16,314 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-12 23:06:16,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-12 23:06:16,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-12 23:06:16,317 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-12 23:06:16,347 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "standard_strcpy_original_false-valid-deref.i_7.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 11:06:16" (1/1) ... [2018-10-12 23:06:16,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "standard_strcpy_original_false-valid-deref.i_7.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 11:06:16" (1/1) ... [2018-10-12 23:06:16,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "standard_strcpy_original_false-valid-deref.i_7.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 11:06:16" (1/1) ... [2018-10-12 23:06:16,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "standard_strcpy_original_false-valid-deref.i_7.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 11:06:16" (1/1) ... [2018-10-12 23:06:16,370 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "standard_strcpy_original_false-valid-deref.i_7.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 11:06:16" (1/1) ... [2018-10-12 23:06:16,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "standard_strcpy_original_false-valid-deref.i_7.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 11:06:16" (1/1) ... [2018-10-12 23:06:16,373 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "standard_strcpy_original_false-valid-deref.i_7.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 11:06:16" (1/1) ... [2018-10-12 23:06:16,375 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-12 23:06:16,376 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-12 23:06:16,376 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-12 23:06:16,376 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-12 23:06:16,377 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "standard_strcpy_original_false-valid-deref.i_7.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 11:06:16" (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 23:06:16,445 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-12 23:06:16,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-12 23:06:16,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-12 23:06:16,937 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-12 23:06:16,938 INFO L202 PluginConnector]: Adding new model standard_strcpy_original_false-valid-deref.i_7.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:06:16 BoogieIcfgContainer [2018-10-12 23:06:16,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-12 23:06:16,938 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2018-10-12 23:06:16,938 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2018-10-12 23:06:16,940 INFO L276 PluginConnector]: IcfgTransformer initialized [2018-10-12 23:06:16,943 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "standard_strcpy_original_false-valid-deref.i_7.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:06:16" (1/1) ... [2018-10-12 23:06:16,953 INFO L137 apSepIcfgTransformer]: HeapSepIcfgTransformer: Starting heap partitioning [2018-10-12 23:06:16,953 INFO L138 apSepIcfgTransformer]: To be partitioned heap arrays found [#memory_int] [2018-10-12 23:06:16,994 INFO L191 apSepIcfgTransformer]: Heap separator: starting loc-array-style preprocessing [2018-10-12 23:06:17,069 INFO L219 apSepIcfgTransformer]: finished MemlocArrayUpdater [2018-10-12 23:06:17,085 INFO L282 apSepIcfgTransformer]: finished preprocessing for the equality analysis [2018-10-12 23:06:17,174 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=1) [2018-10-12 23:06:29,811 INFO L315 AbstractInterpreter]: Visited 58 different actions 111 times. Merged at 30 different actions 51 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-10-12 23:06:29,814 INFO L306 apSepIcfgTransformer]: finished equality analysis [2018-10-12 23:06:29,819 INFO L318 apSepIcfgTransformer]: Finished detection of select terms ("array reads") [2018-10-12 23:06:29,887 WARN L152 HeapPartitionManager]: No literal set constraint found for loc-array access (select (select |#loc_#memory_int_(Array-Int-(Array-Int-#locsort2))| |v_ULTIMATE.start_read~int_#ptr.base_7|) |v_ULTIMATE.start_read~int_#ptr.offset_5|) at (assume #memory_int[read~int_#ptr.base][read~int_#ptr.offset] == read~int_#value;) [2018-10-12 23:06:29,946 WARN L152 HeapPartitionManager]: No literal set constraint found for loc-array access (select (select |#loc_#memory_int_(Array-Int-(Array-Int-#locsort2))| |v_ULTIMATE.start_read~int_#ptr.base_13|) |v_ULTIMATE.start_read~int_#ptr.offset_9|) at (assume #memory_int[read~int_#ptr.base][read~int_#ptr.offset] == read~int_#value;) [2018-10-12 23:06:30,105 INFO L232 HeapPartitionManager]: partitioning result: [2018-10-12 23:06:30,106 INFO L237 HeapPartitionManager]: location blocks for array group [#memory_int, ULTIMATE.start_write~int_old_#memory_int] [2018-10-12 23:06:30,106 INFO L246 HeapPartitionManager]: at dimension 1 [2018-10-12 23:06:30,106 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 2 [2018-10-12 23:06:30,107 INFO L248 HeapPartitionManager]: # location blocks :2 [2018-10-12 23:06:30,107 INFO L246 HeapPartitionManager]: at dimension 2 [2018-10-12 23:06:30,107 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 1 [2018-10-12 23:06:30,107 INFO L248 HeapPartitionManager]: # location blocks :1 [2018-10-12 23:06:30,108 INFO L237 HeapPartitionManager]: location blocks for array group [#memory_int, ULTIMATE.start_write~int_old_#memory_int] [2018-10-12 23:06:30,108 INFO L246 HeapPartitionManager]: at dimension 1 [2018-10-12 23:06:30,108 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 2 [2018-10-12 23:06:30,108 INFO L248 HeapPartitionManager]: # location blocks :2 [2018-10-12 23:06:30,108 INFO L246 HeapPartitionManager]: at dimension 2 [2018-10-12 23:06:30,109 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 1 [2018-10-12 23:06:30,109 INFO L248 HeapPartitionManager]: # location blocks :1 [2018-10-12 23:06:30,112 INFO L145 ransitionTransformer]: executing heap partitioning transformation [2018-10-12 23:06:30,138 INFO L202 PluginConnector]: Adding new model standard_strcpy_original_false-valid-deref.i_7.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 12.10 11:06:30 BasicIcfg [2018-10-12 23:06:30,140 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2018-10-12 23:06:30,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-12 23:06:30,141 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-12 23:06:30,146 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-12 23:06:30,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "standard_strcpy_original_false-valid-deref.i_7.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 11:06:16" (1/3) ... [2018-10-12 23:06:30,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37ed3fc2 and model type standard_strcpy_original_false-valid-deref.i_7.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 11:06:30, skipping insertion in model container [2018-10-12 23:06:30,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "standard_strcpy_original_false-valid-deref.i_7.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:06:16" (2/3) ... [2018-10-12 23:06:30,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37ed3fc2 and model type standard_strcpy_original_false-valid-deref.i_7.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 11:06:30, skipping insertion in model container [2018-10-12 23:06:30,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "standard_strcpy_original_false-valid-deref.i_7.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 12.10 11:06:30" (3/3) ... [2018-10-12 23:06:30,150 INFO L112 eAbstractionObserver]: Analyzing ICFG memPartitionedIcfg [2018-10-12 23:06:30,161 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-10-12 23:06:30,170 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-12 23:06:30,189 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-12 23:06:30,226 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-12 23:06:30,227 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-12 23:06:30,227 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-12 23:06:30,227 INFO L384 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-10-12 23:06:30,227 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-12 23:06:30,230 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-12 23:06:30,231 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-12 23:06:30,231 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-12 23:06:30,231 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-12 23:06:30,251 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2018-10-12 23:06:30,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-12 23:06:30,263 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:06:30,264 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] [2018-10-12 23:06:30,266 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:06:30,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:06:30,272 INFO L82 PathProgramCache]: Analyzing trace with hash 935810993, now seen corresponding path program 1 times [2018-10-12 23:06:30,342 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:06:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:06:31,917 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 23:06:31,920 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-12 23:06:31,920 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-10-12 23:06:31,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-12 23:06:31,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-12 23:06:31,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2018-10-12 23:06:31,940 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 12 states. [2018-10-12 23:06:33,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:06:33,261 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-12 23:06:33,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-12 23:06:33,264 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2018-10-12 23:06:33,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:06:33,276 INFO L225 Difference]: With dead ends: 85 [2018-10-12 23:06:33,276 INFO L226 Difference]: Without dead ends: 85 [2018-10-12 23:06:33,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2018-10-12 23:06:33,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-12 23:06:33,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2018-10-12 23:06:33,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-12 23:06:33,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-12 23:06:33,318 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 30 [2018-10-12 23:06:33,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:06:33,318 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-12 23:06:33,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-12 23:06:33,319 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-12 23:06:33,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-12 23:06:33,320 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:06:33,321 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-12 23:06:33,321 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:06:33,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:06:33,322 INFO L82 PathProgramCache]: Analyzing trace with hash 465255713, now seen corresponding path program 1 times [2018-10-12 23:06:33,323 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:06:33,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:06:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:06:34,050 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:06:34,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-10-12 23:06:34,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-12 23:06:34,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-12 23:06:34,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2018-10-12 23:06:34,052 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 15 states. [2018-10-12 23:06:35,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:06:35,616 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-12 23:06:35,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-12 23:06:35,619 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2018-10-12 23:06:35,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:06:35,621 INFO L225 Difference]: With dead ends: 113 [2018-10-12 23:06:35,621 INFO L226 Difference]: Without dead ends: 113 [2018-10-12 23:06:35,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2018-10-12 23:06:35,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-12 23:06:35,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 87. [2018-10-12 23:06:35,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-12 23:06:35,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-12 23:06:35,632 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 58 [2018-10-12 23:06:35,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:06:35,632 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-12 23:06:35,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-12 23:06:35,633 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-12 23:06:35,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-12 23:06:35,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:06:35,636 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 23:06:35,636 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:06:35,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:06:35,636 INFO L82 PathProgramCache]: Analyzing trace with hash -276194671, now seen corresponding path program 2 times [2018-10-12 23:06:35,637 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:06:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:06:36,157 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:06:36,158 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:06:36,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-10-12 23:06:36,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-12 23:06:36,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-12 23:06:36,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2018-10-12 23:06:36,160 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 16 states. [2018-10-12 23:06:37,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:06:37,566 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-10-12 23:06:37,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-12 23:06:37,567 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2018-10-12 23:06:37,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:06:37,570 INFO L225 Difference]: With dead ends: 141 [2018-10-12 23:06:37,570 INFO L226 Difference]: Without dead ends: 141 [2018-10-12 23:06:37,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=284, Invalid=772, Unknown=0, NotChecked=0, Total=1056 [2018-10-12 23:06:37,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-12 23:06:37,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 115. [2018-10-12 23:06:37,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-12 23:06:37,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-10-12 23:06:37,582 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 86 [2018-10-12 23:06:37,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:06:37,582 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-10-12 23:06:37,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-12 23:06:37,583 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-10-12 23:06:37,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-12 23:06:37,587 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:06:37,587 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-12 23:06:37,587 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:06:37,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:06:37,588 INFO L82 PathProgramCache]: Analyzing trace with hash 994996225, now seen corresponding path program 3 times [2018-10-12 23:06:37,589 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:06:37,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:06:38,306 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:06:38,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:06:38,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-12 23:06:38,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-12 23:06:38,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-12 23:06:38,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2018-10-12 23:06:38,308 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 17 states. [2018-10-12 23:06:40,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:06:40,384 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-10-12 23:06:40,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-12 23:06:40,385 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 114 [2018-10-12 23:06:40,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:06:40,388 INFO L225 Difference]: With dead ends: 169 [2018-10-12 23:06:40,388 INFO L226 Difference]: Without dead ends: 169 [2018-10-12 23:06:40,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2018-10-12 23:06:40,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-12 23:06:40,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 143. [2018-10-12 23:06:40,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-12 23:06:40,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-12 23:06:40,399 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 114 [2018-10-12 23:06:40,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:06:40,400 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-12 23:06:40,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-12 23:06:40,400 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-12 23:06:40,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-12 23:06:40,403 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:06:40,403 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2018-10-12 23:06:40,403 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:06:40,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:06:40,404 INFO L82 PathProgramCache]: Analyzing trace with hash -2061124239, now seen corresponding path program 4 times [2018-10-12 23:06:40,405 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:06:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:06:40,959 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:06:40,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:06:40,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-10-12 23:06:40,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-12 23:06:40,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-12 23:06:40,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2018-10-12 23:06:40,961 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 18 states. [2018-10-12 23:06:42,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:06:42,706 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-10-12 23:06:42,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-12 23:06:42,712 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 142 [2018-10-12 23:06:42,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:06:42,714 INFO L225 Difference]: With dead ends: 197 [2018-10-12 23:06:42,714 INFO L226 Difference]: Without dead ends: 197 [2018-10-12 23:06:42,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=332, Invalid=1000, Unknown=0, NotChecked=0, Total=1332 [2018-10-12 23:06:42,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-10-12 23:06:42,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 171. [2018-10-12 23:06:42,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-12 23:06:42,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-10-12 23:06:42,726 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 142 [2018-10-12 23:06:42,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:06:42,726 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-10-12 23:06:42,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-12 23:06:42,727 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-10-12 23:06:42,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-12 23:06:42,730 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:06:42,730 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2018-10-12 23:06:42,730 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:06:42,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:06:42,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1361806049, now seen corresponding path program 5 times [2018-10-12 23:06:42,732 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:06:42,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:06:43,749 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 295 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:06:43,749 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:06:43,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-10-12 23:06:43,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-12 23:06:43,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-12 23:06:43,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2018-10-12 23:06:43,750 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 19 states. [2018-10-12 23:06:45,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:06:45,736 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2018-10-12 23:06:45,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-12 23:06:45,736 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 170 [2018-10-12 23:06:45,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:06:45,739 INFO L225 Difference]: With dead ends: 225 [2018-10-12 23:06:45,739 INFO L226 Difference]: Without dead ends: 225 [2018-10-12 23:06:45,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=356, Invalid=1126, Unknown=0, NotChecked=0, Total=1482 [2018-10-12 23:06:45,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-10-12 23:06:45,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 199. [2018-10-12 23:06:45,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-12 23:06:45,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-10-12 23:06:45,751 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 170 [2018-10-12 23:06:45,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:06:45,752 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-10-12 23:06:45,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-12 23:06:45,752 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-10-12 23:06:45,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-12 23:06:45,755 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:06:45,756 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2018-10-12 23:06:45,756 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:06:45,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:06:45,757 INFO L82 PathProgramCache]: Analyzing trace with hash 561758289, now seen corresponding path program 6 times [2018-10-12 23:06:45,757 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:06:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:06:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 438 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:06:46,600 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:06:46,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-12 23:06:46,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-12 23:06:46,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-12 23:06:46,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2018-10-12 23:06:46,602 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 20 states. [2018-10-12 23:06:49,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:06:49,167 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2018-10-12 23:06:49,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-12 23:06:49,168 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 198 [2018-10-12 23:06:49,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:06:49,170 INFO L225 Difference]: With dead ends: 253 [2018-10-12 23:06:49,170 INFO L226 Difference]: Without dead ends: 253 [2018-10-12 23:06:49,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=380, Invalid=1260, Unknown=0, NotChecked=0, Total=1640 [2018-10-12 23:06:49,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-10-12 23:06:49,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 227. [2018-10-12 23:06:49,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-10-12 23:06:49,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2018-10-12 23:06:49,181 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 198 [2018-10-12 23:06:49,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:06:49,181 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2018-10-12 23:06:49,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-12 23:06:49,182 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2018-10-12 23:06:49,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-10-12 23:06:49,185 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:06:49,185 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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] [2018-10-12 23:06:49,186 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:06:49,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:06:49,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1983018433, now seen corresponding path program 7 times [2018-10-12 23:06:49,187 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:06:49,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:06:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 0 proven. 609 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:06:49,882 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:06:49,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-10-12 23:06:49,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-12 23:06:49,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-12 23:06:49,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2018-10-12 23:06:49,884 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 21 states. [2018-10-12 23:06:52,496 WARN L178 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2018-10-12 23:06:52,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:06:52,902 INFO L93 Difference]: Finished difference Result 281 states and 281 transitions. [2018-10-12 23:06:52,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-12 23:06:52,902 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 226 [2018-10-12 23:06:52,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:06:52,904 INFO L225 Difference]: With dead ends: 281 [2018-10-12 23:06:52,904 INFO L226 Difference]: Without dead ends: 281 [2018-10-12 23:06:52,905 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=404, Invalid=1402, Unknown=0, NotChecked=0, Total=1806 [2018-10-12 23:06:52,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-10-12 23:06:52,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 255. [2018-10-12 23:06:52,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-10-12 23:06:52,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 255 transitions. [2018-10-12 23:06:52,912 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 255 transitions. Word has length 226 [2018-10-12 23:06:52,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:06:52,913 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 255 transitions. [2018-10-12 23:06:52,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-12 23:06:52,913 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 255 transitions. [2018-10-12 23:06:52,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-10-12 23:06:52,917 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:06:52,917 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2018-10-12 23:06:52,918 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:06:52,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:06:52,918 INFO L82 PathProgramCache]: Analyzing trace with hash -848583887, now seen corresponding path program 8 times [2018-10-12 23:06:52,919 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:06:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:06:53,860 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 0 proven. 808 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:06:53,861 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:06:53,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-12 23:06:53,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-12 23:06:53,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-12 23:06:53,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2018-10-12 23:06:53,862 INFO L87 Difference]: Start difference. First operand 255 states and 255 transitions. Second operand 22 states. [2018-10-12 23:06:56,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:06:56,890 INFO L93 Difference]: Finished difference Result 309 states and 309 transitions. [2018-10-12 23:06:56,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-12 23:06:56,890 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 254 [2018-10-12 23:06:56,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:06:56,892 INFO L225 Difference]: With dead ends: 309 [2018-10-12 23:06:56,892 INFO L226 Difference]: Without dead ends: 309 [2018-10-12 23:06:56,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=428, Invalid=1552, Unknown=0, NotChecked=0, Total=1980 [2018-10-12 23:06:56,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-10-12 23:06:56,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 283. [2018-10-12 23:06:56,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-10-12 23:06:56,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 283 transitions. [2018-10-12 23:06:56,899 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 283 transitions. Word has length 254 [2018-10-12 23:06:56,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:06:56,900 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 283 transitions. [2018-10-12 23:06:56,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-12 23:06:56,900 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 283 transitions. [2018-10-12 23:06:56,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-10-12 23:06:56,902 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:06:56,903 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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] [2018-10-12 23:06:56,903 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:06:56,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:06:56,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1555871583, now seen corresponding path program 9 times [2018-10-12 23:06:56,904 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:06:56,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:06:58,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:06:58,129 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:06:58,129 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-10-12 23:06:58,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-12 23:06:58,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-12 23:06:58,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2018-10-12 23:06:58,130 INFO L87 Difference]: Start difference. First operand 283 states and 283 transitions. Second operand 23 states. [2018-10-12 23:07:01,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:07:01,395 INFO L93 Difference]: Finished difference Result 337 states and 337 transitions. [2018-10-12 23:07:01,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-12 23:07:01,395 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 282 [2018-10-12 23:07:01,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:07:01,398 INFO L225 Difference]: With dead ends: 337 [2018-10-12 23:07:01,398 INFO L226 Difference]: Without dead ends: 337 [2018-10-12 23:07:01,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=452, Invalid=1710, Unknown=0, NotChecked=0, Total=2162 [2018-10-12 23:07:01,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2018-10-12 23:07:01,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 311. [2018-10-12 23:07:01,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2018-10-12 23:07:01,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 311 transitions. [2018-10-12 23:07:01,405 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 311 transitions. Word has length 282 [2018-10-12 23:07:01,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:07:01,406 INFO L481 AbstractCegarLoop]: Abstraction has 311 states and 311 transitions. [2018-10-12 23:07:01,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-12 23:07:01,406 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 311 transitions. [2018-10-12 23:07:01,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-10-12 23:07:01,408 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:07:01,408 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2018-10-12 23:07:01,409 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:07:01,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:07:01,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1909810705, now seen corresponding path program 10 times [2018-10-12 23:07:01,410 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:07:01,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:07:03,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 0 proven. 1290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:07:03,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:07:03,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-12 23:07:03,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-12 23:07:03,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-12 23:07:03,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2018-10-12 23:07:03,081 INFO L87 Difference]: Start difference. First operand 311 states and 311 transitions. Second operand 24 states. [2018-10-12 23:07:06,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:07:06,723 INFO L93 Difference]: Finished difference Result 365 states and 365 transitions. [2018-10-12 23:07:06,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-12 23:07:06,724 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 310 [2018-10-12 23:07:06,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:07:06,726 INFO L225 Difference]: With dead ends: 365 [2018-10-12 23:07:06,726 INFO L226 Difference]: Without dead ends: 365 [2018-10-12 23:07:06,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=476, Invalid=1876, Unknown=0, NotChecked=0, Total=2352 [2018-10-12 23:07:06,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2018-10-12 23:07:06,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 339. [2018-10-12 23:07:06,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-10-12 23:07:06,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 339 transitions. [2018-10-12 23:07:06,733 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 339 transitions. Word has length 310 [2018-10-12 23:07:06,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:07:06,734 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 339 transitions. [2018-10-12 23:07:06,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-12 23:07:06,734 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 339 transitions. [2018-10-12 23:07:06,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-10-12 23:07:06,736 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:07:06,737 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 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] [2018-10-12 23:07:06,737 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:07:06,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:07:06,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1321337983, now seen corresponding path program 11 times [2018-10-12 23:07:06,738 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:07:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:07:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1573 backedges. 0 proven. 1573 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:07:07,992 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:07:07,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-10-12 23:07:07,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-12 23:07:07,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-12 23:07:07,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2018-10-12 23:07:07,994 INFO L87 Difference]: Start difference. First operand 339 states and 339 transitions. Second operand 25 states. [2018-10-12 23:07:12,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:07:12,353 INFO L93 Difference]: Finished difference Result 393 states and 393 transitions. [2018-10-12 23:07:12,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-12 23:07:12,354 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 338 [2018-10-12 23:07:12,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:07:12,356 INFO L225 Difference]: With dead ends: 393 [2018-10-12 23:07:12,357 INFO L226 Difference]: Without dead ends: 393 [2018-10-12 23:07:12,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=500, Invalid=2050, Unknown=0, NotChecked=0, Total=2550 [2018-10-12 23:07:12,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2018-10-12 23:07:12,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 367. [2018-10-12 23:07:12,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2018-10-12 23:07:12,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 367 transitions. [2018-10-12 23:07:12,364 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 367 transitions. Word has length 338 [2018-10-12 23:07:12,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:07:12,365 INFO L481 AbstractCegarLoop]: Abstraction has 367 states and 367 transitions. [2018-10-12 23:07:12,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-12 23:07:12,365 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 367 transitions. [2018-10-12 23:07:12,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2018-10-12 23:07:12,368 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:07:12,368 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 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] [2018-10-12 23:07:12,368 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:07:12,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:07:12,369 INFO L82 PathProgramCache]: Analyzing trace with hash -677836559, now seen corresponding path program 12 times [2018-10-12 23:07:12,369 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:07:12,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:07:14,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1884 backedges. 0 proven. 1884 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:07:14,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:07:14,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-10-12 23:07:14,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-12 23:07:14,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-12 23:07:14,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2018-10-12 23:07:14,159 INFO L87 Difference]: Start difference. First operand 367 states and 367 transitions. Second operand 26 states. [2018-10-12 23:07:19,654 WARN L178 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2018-10-12 23:07:20,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:07:20,027 INFO L93 Difference]: Finished difference Result 421 states and 421 transitions. [2018-10-12 23:07:20,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-12 23:07:20,028 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 366 [2018-10-12 23:07:20,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:07:20,030 INFO L225 Difference]: With dead ends: 421 [2018-10-12 23:07:20,030 INFO L226 Difference]: Without dead ends: 421 [2018-10-12 23:07:20,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=524, Invalid=2232, Unknown=0, NotChecked=0, Total=2756 [2018-10-12 23:07:20,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2018-10-12 23:07:20,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 395. [2018-10-12 23:07:20,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2018-10-12 23:07:20,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 395 transitions. [2018-10-12 23:07:20,037 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 395 transitions. Word has length 366 [2018-10-12 23:07:20,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:07:20,038 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 395 transitions. [2018-10-12 23:07:20,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-12 23:07:20,038 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 395 transitions. [2018-10-12 23:07:20,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2018-10-12 23:07:20,041 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:07:20,041 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 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] [2018-10-12 23:07:20,041 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:07:20,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:07:20,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1493339745, now seen corresponding path program 13 times [2018-10-12 23:07:20,043 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:07:20,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:07:21,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 0 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:07:21,542 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:07:21,542 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-10-12 23:07:21,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-12 23:07:21,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-12 23:07:21,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2018-10-12 23:07:21,544 INFO L87 Difference]: Start difference. First operand 395 states and 395 transitions. Second operand 27 states. [2018-10-12 23:07:26,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:07:26,736 INFO L93 Difference]: Finished difference Result 449 states and 449 transitions. [2018-10-12 23:07:26,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-12 23:07:26,736 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 394 [2018-10-12 23:07:26,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:07:26,739 INFO L225 Difference]: With dead ends: 449 [2018-10-12 23:07:26,739 INFO L226 Difference]: Without dead ends: 449 [2018-10-12 23:07:26,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=548, Invalid=2422, Unknown=0, NotChecked=0, Total=2970 [2018-10-12 23:07:26,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2018-10-12 23:07:26,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 423. [2018-10-12 23:07:26,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423 states. [2018-10-12 23:07:26,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 423 transitions. [2018-10-12 23:07:26,747 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 423 transitions. Word has length 394 [2018-10-12 23:07:26,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:07:26,748 INFO L481 AbstractCegarLoop]: Abstraction has 423 states and 423 transitions. [2018-10-12 23:07:26,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-12 23:07:26,748 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 423 transitions. [2018-10-12 23:07:26,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2018-10-12 23:07:26,751 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:07:26,751 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 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] [2018-10-12 23:07:26,751 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:07:26,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:07:26,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1483306031, now seen corresponding path program 14 times [2018-10-12 23:07:26,753 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:07:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:07:27,281 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-12 23:07:29,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2590 backedges. 0 proven. 2590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:07:29,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:07:29,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-12 23:07:29,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-12 23:07:29,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-12 23:07:29,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2018-10-12 23:07:29,102 INFO L87 Difference]: Start difference. First operand 423 states and 423 transitions. Second operand 28 states. [2018-10-12 23:07:35,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:07:35,324 INFO L93 Difference]: Finished difference Result 477 states and 477 transitions. [2018-10-12 23:07:35,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-12 23:07:35,325 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 422 [2018-10-12 23:07:35,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:07:35,327 INFO L225 Difference]: With dead ends: 477 [2018-10-12 23:07:35,327 INFO L226 Difference]: Without dead ends: 477 [2018-10-12 23:07:35,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=572, Invalid=2620, Unknown=0, NotChecked=0, Total=3192 [2018-10-12 23:07:35,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2018-10-12 23:07:35,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 451. [2018-10-12 23:07:35,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2018-10-12 23:07:35,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 451 transitions. [2018-10-12 23:07:35,335 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 451 transitions. Word has length 422 [2018-10-12 23:07:35,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:07:35,336 INFO L481 AbstractCegarLoop]: Abstraction has 451 states and 451 transitions. [2018-10-12 23:07:35,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-12 23:07:35,336 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 451 transitions. [2018-10-12 23:07:35,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2018-10-12 23:07:35,339 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:07:35,339 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 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] [2018-10-12 23:07:35,339 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:07:35,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:07:35,340 INFO L82 PathProgramCache]: Analyzing trace with hash 863043905, now seen corresponding path program 15 times [2018-10-12 23:07:35,340 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:07:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:07:35,885 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-12 23:07:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2985 backedges. 0 proven. 2985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:07:37,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:07:37,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-10-12 23:07:37,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-12 23:07:37,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-12 23:07:37,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2018-10-12 23:07:37,474 INFO L87 Difference]: Start difference. First operand 451 states and 451 transitions. Second operand 29 states. [2018-10-12 23:07:43,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:07:43,848 INFO L93 Difference]: Finished difference Result 505 states and 505 transitions. [2018-10-12 23:07:43,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-12 23:07:43,848 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 450 [2018-10-12 23:07:43,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:07:43,851 INFO L225 Difference]: With dead ends: 505 [2018-10-12 23:07:43,852 INFO L226 Difference]: Without dead ends: 505 [2018-10-12 23:07:43,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=596, Invalid=2826, Unknown=0, NotChecked=0, Total=3422 [2018-10-12 23:07:43,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2018-10-12 23:07:43,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 479. [2018-10-12 23:07:43,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2018-10-12 23:07:43,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 479 transitions. [2018-10-12 23:07:43,860 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 479 transitions. Word has length 450 [2018-10-12 23:07:43,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:07:43,860 INFO L481 AbstractCegarLoop]: Abstraction has 479 states and 479 transitions. [2018-10-12 23:07:43,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-12 23:07:43,861 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 479 transitions. [2018-10-12 23:07:43,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2018-10-12 23:07:43,863 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:07:43,864 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 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] [2018-10-12 23:07:43,864 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:07:43,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:07:43,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1789783729, now seen corresponding path program 16 times [2018-10-12 23:07:43,865 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:07:43,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:07:45,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3408 backedges. 0 proven. 3408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:07:45,594 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:07:45,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-10-12 23:07:45,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-12 23:07:45,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-12 23:07:45,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2018-10-12 23:07:45,595 INFO L87 Difference]: Start difference. First operand 479 states and 479 transitions. Second operand 30 states. [2018-10-12 23:07:46,068 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-10-12 23:07:52,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:07:52,855 INFO L93 Difference]: Finished difference Result 533 states and 533 transitions. [2018-10-12 23:07:52,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-12 23:07:52,855 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 478 [2018-10-12 23:07:52,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:07:52,858 INFO L225 Difference]: With dead ends: 533 [2018-10-12 23:07:52,858 INFO L226 Difference]: Without dead ends: 533 [2018-10-12 23:07:52,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=620, Invalid=3040, Unknown=0, NotChecked=0, Total=3660 [2018-10-12 23:07:52,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2018-10-12 23:07:52,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 507. [2018-10-12 23:07:52,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 507 states. [2018-10-12 23:07:52,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 507 transitions. [2018-10-12 23:07:52,867 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 507 transitions. Word has length 478 [2018-10-12 23:07:52,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:07:52,868 INFO L481 AbstractCegarLoop]: Abstraction has 507 states and 507 transitions. [2018-10-12 23:07:52,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-12 23:07:52,868 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 507 transitions. [2018-10-12 23:07:52,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2018-10-12 23:07:52,871 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:07:52,871 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 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] [2018-10-12 23:07:52,872 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:07:52,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:07:52,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1184279519, now seen corresponding path program 17 times [2018-10-12 23:07:52,873 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:07:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:07:55,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3859 backedges. 0 proven. 3859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:07:55,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:07:55,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-10-12 23:07:55,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-12 23:07:55,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-12 23:07:55,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2018-10-12 23:07:55,207 INFO L87 Difference]: Start difference. First operand 507 states and 507 transitions. Second operand 31 states. [2018-10-12 23:07:55,779 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-10-12 23:07:59,279 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2018-10-12 23:08:03,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:08:03,201 INFO L93 Difference]: Finished difference Result 561 states and 561 transitions. [2018-10-12 23:08:03,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-12 23:08:03,202 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 506 [2018-10-12 23:08:03,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:08:03,205 INFO L225 Difference]: With dead ends: 561 [2018-10-12 23:08:03,205 INFO L226 Difference]: Without dead ends: 561 [2018-10-12 23:08:03,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=644, Invalid=3262, Unknown=0, NotChecked=0, Total=3906 [2018-10-12 23:08:03,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2018-10-12 23:08:03,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 535. [2018-10-12 23:08:03,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2018-10-12 23:08:03,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 535 transitions. [2018-10-12 23:08:03,214 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 535 transitions. Word has length 506 [2018-10-12 23:08:03,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:08:03,215 INFO L481 AbstractCegarLoop]: Abstraction has 535 states and 535 transitions. [2018-10-12 23:08:03,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-12 23:08:03,215 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 535 transitions. [2018-10-12 23:08:03,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2018-10-12 23:08:03,219 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:08:03,219 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 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] [2018-10-12 23:08:03,219 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:08:03,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:08:03,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1983958639, now seen corresponding path program 18 times [2018-10-12 23:08:03,221 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:08:03,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:08:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4338 backedges. 0 proven. 4338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:08:05,282 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:08:05,282 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-12 23:08:05,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-12 23:08:05,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-12 23:08:05,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2018-10-12 23:08:05,284 INFO L87 Difference]: Start difference. First operand 535 states and 535 transitions. Second operand 32 states. [2018-10-12 23:08:13,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:08:13,659 INFO L93 Difference]: Finished difference Result 589 states and 589 transitions. [2018-10-12 23:08:13,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-12 23:08:13,659 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 534 [2018-10-12 23:08:13,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:08:13,662 INFO L225 Difference]: With dead ends: 589 [2018-10-12 23:08:13,662 INFO L226 Difference]: Without dead ends: 589 [2018-10-12 23:08:13,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=668, Invalid=3492, Unknown=0, NotChecked=0, Total=4160 [2018-10-12 23:08:13,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2018-10-12 23:08:13,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 563. [2018-10-12 23:08:13,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 563 states. [2018-10-12 23:08:13,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 563 transitions. [2018-10-12 23:08:13,670 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 563 transitions. Word has length 534 [2018-10-12 23:08:13,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:08:13,671 INFO L481 AbstractCegarLoop]: Abstraction has 563 states and 563 transitions. [2018-10-12 23:08:13,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-12 23:08:13,671 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 563 transitions. [2018-10-12 23:08:13,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2018-10-12 23:08:13,675 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:08:13,675 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 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] [2018-10-12 23:08:13,676 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:08:13,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:08:13,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1137411841, now seen corresponding path program 19 times [2018-10-12 23:08:13,677 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:08:13,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:08:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 4845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:08:15,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:08:15,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-10-12 23:08:15,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-12 23:08:15,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-12 23:08:15,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2018-10-12 23:08:15,878 INFO L87 Difference]: Start difference. First operand 563 states and 563 transitions. Second operand 33 states. [2018-10-12 23:08:24,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:08:24,888 INFO L93 Difference]: Finished difference Result 617 states and 617 transitions. [2018-10-12 23:08:24,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-12 23:08:24,889 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 562 [2018-10-12 23:08:24,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:08:24,892 INFO L225 Difference]: With dead ends: 617 [2018-10-12 23:08:24,892 INFO L226 Difference]: Without dead ends: 617 [2018-10-12 23:08:24,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=692, Invalid=3730, Unknown=0, NotChecked=0, Total=4422 [2018-10-12 23:08:24,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2018-10-12 23:08:24,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 591. [2018-10-12 23:08:24,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2018-10-12 23:08:24,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 591 transitions. [2018-10-12 23:08:24,901 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 591 transitions. Word has length 562 [2018-10-12 23:08:24,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:08:24,901 INFO L481 AbstractCegarLoop]: Abstraction has 591 states and 591 transitions. [2018-10-12 23:08:24,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-12 23:08:24,902 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 591 transitions. [2018-10-12 23:08:24,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2018-10-12 23:08:24,906 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:08:24,906 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 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] [2018-10-12 23:08:24,906 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:08:24,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:08:24,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1303008369, now seen corresponding path program 20 times [2018-10-12 23:08:24,908 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:08:24,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:08:27,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5380 backedges. 0 proven. 5380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:08:27,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:08:27,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-10-12 23:08:27,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-12 23:08:27,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-12 23:08:27,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2018-10-12 23:08:27,133 INFO L87 Difference]: Start difference. First operand 591 states and 591 transitions. Second operand 34 states. [2018-10-12 23:08:36,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:08:36,975 INFO L93 Difference]: Finished difference Result 645 states and 645 transitions. [2018-10-12 23:08:36,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-12 23:08:36,975 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 590 [2018-10-12 23:08:36,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:08:36,978 INFO L225 Difference]: With dead ends: 645 [2018-10-12 23:08:36,978 INFO L226 Difference]: Without dead ends: 645 [2018-10-12 23:08:36,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=716, Invalid=3976, Unknown=0, NotChecked=0, Total=4692 [2018-10-12 23:08:36,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2018-10-12 23:08:36,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 619. [2018-10-12 23:08:36,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 619 states. [2018-10-12 23:08:36,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 619 transitions. [2018-10-12 23:08:36,988 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 619 transitions. Word has length 590 [2018-10-12 23:08:36,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:08:36,988 INFO L481 AbstractCegarLoop]: Abstraction has 619 states and 619 transitions. [2018-10-12 23:08:36,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-12 23:08:36,988 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 619 transitions. [2018-10-12 23:08:36,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 619 [2018-10-12 23:08:36,993 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:08:36,993 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 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] [2018-10-12 23:08:36,994 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:08:36,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:08:36,994 INFO L82 PathProgramCache]: Analyzing trace with hash 192387553, now seen corresponding path program 21 times [2018-10-12 23:08:36,995 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:08:37,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:08:39,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5943 backedges. 0 proven. 5943 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:08:39,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:08:39,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-10-12 23:08:39,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-12 23:08:39,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-12 23:08:39,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2018-10-12 23:08:39,414 INFO L87 Difference]: Start difference. First operand 619 states and 619 transitions. Second operand 35 states. [2018-10-12 23:08:49,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:08:49,909 INFO L93 Difference]: Finished difference Result 673 states and 673 transitions. [2018-10-12 23:08:49,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-12 23:08:49,910 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 618 [2018-10-12 23:08:49,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:08:49,913 INFO L225 Difference]: With dead ends: 673 [2018-10-12 23:08:49,914 INFO L226 Difference]: Without dead ends: 673 [2018-10-12 23:08:49,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=740, Invalid=4230, Unknown=0, NotChecked=0, Total=4970 [2018-10-12 23:08:49,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2018-10-12 23:08:49,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 647. [2018-10-12 23:08:49,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 647 states. [2018-10-12 23:08:49,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 647 transitions. [2018-10-12 23:08:49,922 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 647 transitions. Word has length 618 [2018-10-12 23:08:49,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:08:49,923 INFO L481 AbstractCegarLoop]: Abstraction has 647 states and 647 transitions. [2018-10-12 23:08:49,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-12 23:08:49,923 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 647 transitions. [2018-10-12 23:08:49,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 647 [2018-10-12 23:08:49,928 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:08:49,929 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 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] [2018-10-12 23:08:49,929 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:08:49,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:08:49,929 INFO L82 PathProgramCache]: Analyzing trace with hash -548448431, now seen corresponding path program 22 times [2018-10-12 23:08:49,930 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:08:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:08:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6534 backedges. 0 proven. 6534 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:08:52,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:08:52,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-10-12 23:08:52,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-12 23:08:52,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-12 23:08:52,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2018-10-12 23:08:52,600 INFO L87 Difference]: Start difference. First operand 647 states and 647 transitions. Second operand 36 states. [2018-10-12 23:09:03,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:09:03,914 INFO L93 Difference]: Finished difference Result 701 states and 701 transitions. [2018-10-12 23:09:03,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-12 23:09:03,914 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 646 [2018-10-12 23:09:03,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:09:03,917 INFO L225 Difference]: With dead ends: 701 [2018-10-12 23:09:03,917 INFO L226 Difference]: Without dead ends: 701 [2018-10-12 23:09:03,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=764, Invalid=4492, Unknown=0, NotChecked=0, Total=5256 [2018-10-12 23:09:03,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2018-10-12 23:09:03,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 675. [2018-10-12 23:09:03,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 675 states. [2018-10-12 23:09:03,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 675 transitions. [2018-10-12 23:09:03,924 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 675 transitions. Word has length 646 [2018-10-12 23:09:03,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:09:03,925 INFO L481 AbstractCegarLoop]: Abstraction has 675 states and 675 transitions. [2018-10-12 23:09:03,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-12 23:09:03,925 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 675 transitions. [2018-10-12 23:09:03,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 675 [2018-10-12 23:09:03,930 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:09:03,931 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 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] [2018-10-12 23:09:03,931 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:09:03,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:09:03,931 INFO L82 PathProgramCache]: Analyzing trace with hash 692948161, now seen corresponding path program 23 times [2018-10-12 23:09:03,932 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:09:03,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:09:06,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7153 backedges. 0 proven. 7153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:09:06,828 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:09:06,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-10-12 23:09:06,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-12 23:09:06,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-12 23:09:06,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2018-10-12 23:09:06,830 INFO L87 Difference]: Start difference. First operand 675 states and 675 transitions. Second operand 37 states. [2018-10-12 23:09:19,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:09:19,103 INFO L93 Difference]: Finished difference Result 729 states and 729 transitions. [2018-10-12 23:09:19,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-12 23:09:19,103 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 674 [2018-10-12 23:09:19,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:09:19,106 INFO L225 Difference]: With dead ends: 729 [2018-10-12 23:09:19,106 INFO L226 Difference]: Without dead ends: 729 [2018-10-12 23:09:19,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=788, Invalid=4762, Unknown=0, NotChecked=0, Total=5550 [2018-10-12 23:09:19,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2018-10-12 23:09:19,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 703. [2018-10-12 23:09:19,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2018-10-12 23:09:19,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 703 transitions. [2018-10-12 23:09:19,114 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 703 transitions. Word has length 674 [2018-10-12 23:09:19,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:09:19,115 INFO L481 AbstractCegarLoop]: Abstraction has 703 states and 703 transitions. [2018-10-12 23:09:19,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-12 23:09:19,115 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 703 transitions. [2018-10-12 23:09:19,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 703 [2018-10-12 23:09:19,120 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:09:19,120 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 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] [2018-10-12 23:09:19,121 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:09:19,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:09:19,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1200503345, now seen corresponding path program 24 times [2018-10-12 23:09:19,122 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:09:19,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:09:19,903 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-12 23:09:22,990 INFO L134 CoverageAnalysis]: Checked inductivity of 7800 backedges. 0 proven. 7800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:09:22,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:09:22,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-12 23:09:22,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-12 23:09:22,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-12 23:09:22,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2018-10-12 23:09:22,991 INFO L87 Difference]: Start difference. First operand 703 states and 703 transitions. Second operand 38 states. [2018-10-12 23:09:36,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:09:36,338 INFO L93 Difference]: Finished difference Result 757 states and 757 transitions. [2018-10-12 23:09:36,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-12 23:09:36,338 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 702 [2018-10-12 23:09:36,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:09:36,341 INFO L225 Difference]: With dead ends: 757 [2018-10-12 23:09:36,341 INFO L226 Difference]: Without dead ends: 757 [2018-10-12 23:09:36,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=812, Invalid=5040, Unknown=0, NotChecked=0, Total=5852 [2018-10-12 23:09:36,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2018-10-12 23:09:36,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 731. [2018-10-12 23:09:36,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2018-10-12 23:09:36,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 731 transitions. [2018-10-12 23:09:36,349 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 731 transitions. Word has length 702 [2018-10-12 23:09:36,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:09:36,350 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 731 transitions. [2018-10-12 23:09:36,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-12 23:09:36,350 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 731 transitions. [2018-10-12 23:09:36,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 731 [2018-10-12 23:09:36,355 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:09:36,356 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 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] [2018-10-12 23:09:36,356 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:09:36,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:09:36,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1775411295, now seen corresponding path program 25 times [2018-10-12 23:09:36,357 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:09:36,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:09:39,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8475 backedges. 0 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:09:39,813 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:09:39,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-10-12 23:09:39,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-12 23:09:39,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-12 23:09:39,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2018-10-12 23:09:39,814 INFO L87 Difference]: Start difference. First operand 731 states and 731 transitions. Second operand 39 states. [2018-10-12 23:09:54,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:09:54,915 INFO L93 Difference]: Finished difference Result 785 states and 785 transitions. [2018-10-12 23:09:54,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-12 23:09:54,916 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 730 [2018-10-12 23:09:54,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:09:54,919 INFO L225 Difference]: With dead ends: 785 [2018-10-12 23:09:54,919 INFO L226 Difference]: Without dead ends: 785 [2018-10-12 23:09:54,920 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=836, Invalid=5326, Unknown=0, NotChecked=0, Total=6162 [2018-10-12 23:09:54,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2018-10-12 23:09:54,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 759. [2018-10-12 23:09:54,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 759 states. [2018-10-12 23:09:54,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 759 transitions. [2018-10-12 23:09:54,927 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 759 transitions. Word has length 730 [2018-10-12 23:09:54,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:09:54,928 INFO L481 AbstractCegarLoop]: Abstraction has 759 states and 759 transitions. [2018-10-12 23:09:54,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-12 23:09:54,928 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 759 transitions. [2018-10-12 23:09:54,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 759 [2018-10-12 23:09:54,934 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:09:54,935 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 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] [2018-10-12 23:09:54,935 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:09:54,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:09:54,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1866923281, now seen corresponding path program 26 times [2018-10-12 23:09:54,936 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:09:55,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:09:58,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9178 backedges. 0 proven. 9178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:09:58,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:09:58,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-12 23:09:58,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-12 23:09:58,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-12 23:09:58,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2018-10-12 23:09:58,525 INFO L87 Difference]: Start difference. First operand 759 states and 759 transitions. Second operand 40 states. [2018-10-12 23:10:14,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:10:14,253 INFO L93 Difference]: Finished difference Result 813 states and 813 transitions. [2018-10-12 23:10:14,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-12 23:10:14,253 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 758 [2018-10-12 23:10:14,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:10:14,256 INFO L225 Difference]: With dead ends: 813 [2018-10-12 23:10:14,256 INFO L226 Difference]: Without dead ends: 813 [2018-10-12 23:10:14,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=860, Invalid=5620, Unknown=0, NotChecked=0, Total=6480 [2018-10-12 23:10:14,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2018-10-12 23:10:14,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 787. [2018-10-12 23:10:14,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 787 states. [2018-10-12 23:10:14,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 787 transitions. [2018-10-12 23:10:14,265 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 787 transitions. Word has length 758 [2018-10-12 23:10:14,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:10:14,266 INFO L481 AbstractCegarLoop]: Abstraction has 787 states and 787 transitions. [2018-10-12 23:10:14,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-12 23:10:14,266 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 787 transitions. [2018-10-12 23:10:14,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 787 [2018-10-12 23:10:14,273 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:10:14,274 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 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] [2018-10-12 23:10:14,274 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:10:14,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:10:14,275 INFO L82 PathProgramCache]: Analyzing trace with hash 720835201, now seen corresponding path program 27 times [2018-10-12 23:10:14,275 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:10:14,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:10:18,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9909 backedges. 0 proven. 9909 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:10:18,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:10:18,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-10-12 23:10:18,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-12 23:10:18,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-12 23:10:18,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2018-10-12 23:10:18,268 INFO L87 Difference]: Start difference. First operand 787 states and 787 transitions. Second operand 41 states. [2018-10-12 23:10:34,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:10:34,580 INFO L93 Difference]: Finished difference Result 841 states and 841 transitions. [2018-10-12 23:10:34,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-12 23:10:34,580 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 786 [2018-10-12 23:10:34,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:10:34,583 INFO L225 Difference]: With dead ends: 841 [2018-10-12 23:10:34,583 INFO L226 Difference]: Without dead ends: 841 [2018-10-12 23:10:34,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=884, Invalid=5922, Unknown=0, NotChecked=0, Total=6806 [2018-10-12 23:10:34,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2018-10-12 23:10:34,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 815. [2018-10-12 23:10:34,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 815 states. [2018-10-12 23:10:34,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 815 transitions. [2018-10-12 23:10:34,592 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 815 transitions. Word has length 786 [2018-10-12 23:10:34,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:10:34,593 INFO L481 AbstractCegarLoop]: Abstraction has 815 states and 815 transitions. [2018-10-12 23:10:34,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-12 23:10:34,593 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 815 transitions. [2018-10-12 23:10:34,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 815 [2018-10-12 23:10:34,600 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:10:34,601 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 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] [2018-10-12 23:10:34,601 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:10:34,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:10:34,601 INFO L82 PathProgramCache]: Analyzing trace with hash 525967345, now seen corresponding path program 28 times [2018-10-12 23:10:34,602 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:10:34,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:10:38,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10668 backedges. 0 proven. 10668 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:10:38,263 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:10:38,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-10-12 23:10:38,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-12 23:10:38,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-12 23:10:38,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2018-10-12 23:10:38,265 INFO L87 Difference]: Start difference. First operand 815 states and 815 transitions. Second operand 42 states. [2018-10-12 23:10:55,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:10:55,441 INFO L93 Difference]: Finished difference Result 869 states and 869 transitions. [2018-10-12 23:10:55,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-12 23:10:55,441 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 814 [2018-10-12 23:10:55,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:10:55,444 INFO L225 Difference]: With dead ends: 869 [2018-10-12 23:10:55,445 INFO L226 Difference]: Without dead ends: 869 [2018-10-12 23:10:55,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=908, Invalid=6232, Unknown=0, NotChecked=0, Total=7140 [2018-10-12 23:10:55,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2018-10-12 23:10:55,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 843. [2018-10-12 23:10:55,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 843 states. [2018-10-12 23:10:55,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 843 transitions. [2018-10-12 23:10:55,453 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 843 transitions. Word has length 814 [2018-10-12 23:10:55,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:10:55,453 INFO L481 AbstractCegarLoop]: Abstraction has 843 states and 843 transitions. [2018-10-12 23:10:55,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-12 23:10:55,454 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 843 transitions. [2018-10-12 23:10:55,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 843 [2018-10-12 23:10:55,461 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:10:55,461 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 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] [2018-10-12 23:10:55,462 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:10:55,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:10:55,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1601526431, now seen corresponding path program 29 times [2018-10-12 23:10:55,463 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:10:55,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:10:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 11455 backedges. 0 proven. 11455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:10:59,263 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:10:59,264 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-10-12 23:10:59,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-12 23:10:59,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-12 23:10:59,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2018-10-12 23:10:59,265 INFO L87 Difference]: Start difference. First operand 843 states and 843 transitions. Second operand 43 states. [2018-10-12 23:11:17,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:11:17,308 INFO L93 Difference]: Finished difference Result 897 states and 897 transitions. [2018-10-12 23:11:17,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-12 23:11:17,308 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 842 [2018-10-12 23:11:17,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:11:17,311 INFO L225 Difference]: With dead ends: 897 [2018-10-12 23:11:17,311 INFO L226 Difference]: Without dead ends: 897 [2018-10-12 23:11:17,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=932, Invalid=6550, Unknown=0, NotChecked=0, Total=7482 [2018-10-12 23:11:17,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2018-10-12 23:11:17,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 871. [2018-10-12 23:11:17,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 871 states. [2018-10-12 23:11:17,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 871 transitions. [2018-10-12 23:11:17,319 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 871 transitions. Word has length 842 [2018-10-12 23:11:17,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:11:17,319 INFO L481 AbstractCegarLoop]: Abstraction has 871 states and 871 transitions. [2018-10-12 23:11:17,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-12 23:11:17,319 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 871 transitions. [2018-10-12 23:11:17,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 871 [2018-10-12 23:11:17,327 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:11:17,328 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 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] [2018-10-12 23:11:17,328 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:11:17,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:11:17,328 INFO L82 PathProgramCache]: Analyzing trace with hash 10887889, now seen corresponding path program 30 times [2018-10-12 23:11:17,329 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:11:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:11:21,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12270 backedges. 0 proven. 12270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:11:21,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:11:21,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-12 23:11:21,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-12 23:11:21,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-12 23:11:21,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2018-10-12 23:11:21,412 INFO L87 Difference]: Start difference. First operand 871 states and 871 transitions. Second operand 44 states. [2018-10-12 23:11:40,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:11:40,515 INFO L93 Difference]: Finished difference Result 925 states and 925 transitions. [2018-10-12 23:11:40,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-12 23:11:40,515 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 870 [2018-10-12 23:11:40,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:11:40,518 INFO L225 Difference]: With dead ends: 925 [2018-10-12 23:11:40,518 INFO L226 Difference]: Without dead ends: 925 [2018-10-12 23:11:40,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=956, Invalid=6876, Unknown=0, NotChecked=0, Total=7832 [2018-10-12 23:11:40,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2018-10-12 23:11:40,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 899. [2018-10-12 23:11:40,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2018-10-12 23:11:40,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 899 transitions. [2018-10-12 23:11:40,526 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 899 transitions. Word has length 870 [2018-10-12 23:11:40,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:11:40,526 INFO L481 AbstractCegarLoop]: Abstraction has 899 states and 899 transitions. [2018-10-12 23:11:40,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-12 23:11:40,526 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 899 transitions. [2018-10-12 23:11:40,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 899 [2018-10-12 23:11:40,534 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:11:40,535 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 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] [2018-10-12 23:11:40,535 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:11:40,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:11:40,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1882711999, now seen corresponding path program 31 times [2018-10-12 23:11:40,536 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:11:40,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:11:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 13113 backedges. 0 proven. 13113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:11:45,007 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:11:45,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-10-12 23:11:45,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-12 23:11:45,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-12 23:11:45,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2018-10-12 23:11:45,009 INFO L87 Difference]: Start difference. First operand 899 states and 899 transitions. Second operand 45 states. [2018-10-12 23:12:05,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:12:05,305 INFO L93 Difference]: Finished difference Result 953 states and 953 transitions. [2018-10-12 23:12:05,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-12 23:12:05,305 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 898 [2018-10-12 23:12:05,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:12:05,308 INFO L225 Difference]: With dead ends: 953 [2018-10-12 23:12:05,309 INFO L226 Difference]: Without dead ends: 953 [2018-10-12 23:12:05,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=980, Invalid=7210, Unknown=0, NotChecked=0, Total=8190 [2018-10-12 23:12:05,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2018-10-12 23:12:05,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 927. [2018-10-12 23:12:05,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 927 states. [2018-10-12 23:12:05,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 927 transitions. [2018-10-12 23:12:05,318 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 927 transitions. Word has length 898 [2018-10-12 23:12:05,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:12:05,319 INFO L481 AbstractCegarLoop]: Abstraction has 927 states and 927 transitions. [2018-10-12 23:12:05,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-12 23:12:05,319 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 927 transitions. [2018-10-12 23:12:05,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 927 [2018-10-12 23:12:05,325 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:12:05,326 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 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] [2018-10-12 23:12:05,326 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:12:05,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:12:05,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1676900943, now seen corresponding path program 32 times [2018-10-12 23:12:05,327 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:12:05,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:12:09,898 INFO L134 CoverageAnalysis]: Checked inductivity of 13984 backedges. 0 proven. 13984 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:12:09,899 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:12:09,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-12 23:12:09,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-12 23:12:09,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-12 23:12:09,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2018-10-12 23:12:09,901 INFO L87 Difference]: Start difference. First operand 927 states and 927 transitions. Second operand 46 states. [2018-10-12 23:12:31,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:12:31,107 INFO L93 Difference]: Finished difference Result 981 states and 981 transitions. [2018-10-12 23:12:31,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-12 23:12:31,107 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 926 [2018-10-12 23:12:31,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:12:31,110 INFO L225 Difference]: With dead ends: 981 [2018-10-12 23:12:31,110 INFO L226 Difference]: Without dead ends: 981 [2018-10-12 23:12:31,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1004, Invalid=7552, Unknown=0, NotChecked=0, Total=8556 [2018-10-12 23:12:31,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2018-10-12 23:12:31,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 955. [2018-10-12 23:12:31,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 955 states. [2018-10-12 23:12:31,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 955 transitions. [2018-10-12 23:12:31,118 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 955 transitions. Word has length 926 [2018-10-12 23:12:31,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:12:31,119 INFO L481 AbstractCegarLoop]: Abstraction has 955 states and 955 transitions. [2018-10-12 23:12:31,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-12 23:12:31,119 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 955 transitions. [2018-10-12 23:12:31,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 955 [2018-10-12 23:12:31,126 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:12:31,126 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 23:12:31,126 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:12:31,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:12:31,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1905224481, now seen corresponding path program 33 times [2018-10-12 23:12:31,127 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:12:31,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:12:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 14883 backedges. 0 proven. 14883 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:12:35,841 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:12:35,841 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-10-12 23:12:35,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-12 23:12:35,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-12 23:12:35,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2018-10-12 23:12:35,842 INFO L87 Difference]: Start difference. First operand 955 states and 955 transitions. Second operand 47 states. [2018-10-12 23:12:58,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:12:58,276 INFO L93 Difference]: Finished difference Result 1009 states and 1009 transitions. [2018-10-12 23:12:58,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-12 23:12:58,276 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 954 [2018-10-12 23:12:58,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:12:58,279 INFO L225 Difference]: With dead ends: 1009 [2018-10-12 23:12:58,279 INFO L226 Difference]: Without dead ends: 1009 [2018-10-12 23:12:58,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1028, Invalid=7902, Unknown=0, NotChecked=0, Total=8930 [2018-10-12 23:12:58,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2018-10-12 23:12:58,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 983. [2018-10-12 23:12:58,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 983 states. [2018-10-12 23:12:58,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 983 transitions. [2018-10-12 23:12:58,287 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 983 transitions. Word has length 954 [2018-10-12 23:12:58,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:12:58,287 INFO L481 AbstractCegarLoop]: Abstraction has 983 states and 983 transitions. [2018-10-12 23:12:58,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-12 23:12:58,288 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 983 transitions. [2018-10-12 23:12:58,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 983 [2018-10-12 23:12:58,295 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:12:58,295 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 23:12:58,295 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:12:58,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:12:58,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1517078673, now seen corresponding path program 34 times [2018-10-12 23:12:58,296 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:12:58,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:13:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 15810 backedges. 0 proven. 15810 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:13:03,639 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:13:03,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-12 23:13:03,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-12 23:13:03,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-12 23:13:03,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2018-10-12 23:13:03,640 INFO L87 Difference]: Start difference. First operand 983 states and 983 transitions. Second operand 48 states. [2018-10-12 23:13:27,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:13:27,563 INFO L93 Difference]: Finished difference Result 1037 states and 1037 transitions. [2018-10-12 23:13:27,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-12 23:13:27,563 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 982 [2018-10-12 23:13:27,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:13:27,566 INFO L225 Difference]: With dead ends: 1037 [2018-10-12 23:13:27,567 INFO L226 Difference]: Without dead ends: 1037 [2018-10-12 23:13:27,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1422 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1052, Invalid=8260, Unknown=0, NotChecked=0, Total=9312 [2018-10-12 23:13:27,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2018-10-12 23:13:27,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 1011. [2018-10-12 23:13:27,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1011 states. [2018-10-12 23:13:27,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 1011 transitions. [2018-10-12 23:13:27,574 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 1011 transitions. Word has length 982 [2018-10-12 23:13:27,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:13:27,575 INFO L481 AbstractCegarLoop]: Abstraction has 1011 states and 1011 transitions. [2018-10-12 23:13:27,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-12 23:13:27,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 1011 transitions. [2018-10-12 23:13:27,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1011 [2018-10-12 23:13:27,582 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:13:27,582 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 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 23:13:27,583 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:13:27,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:13:27,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1631543807, now seen corresponding path program 35 times [2018-10-12 23:13:27,584 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:13:27,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:13:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16765 backedges. 0 proven. 16765 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:13:32,734 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:13:32,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-10-12 23:13:32,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-12 23:13:32,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-12 23:13:32,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2018-10-12 23:13:32,735 INFO L87 Difference]: Start difference. First operand 1011 states and 1011 transitions. Second operand 49 states. [2018-10-12 23:13:57,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:13:57,751 INFO L93 Difference]: Finished difference Result 1065 states and 1065 transitions. [2018-10-12 23:13:57,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-12 23:13:57,752 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 1010 [2018-10-12 23:13:57,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:13:57,755 INFO L225 Difference]: With dead ends: 1065 [2018-10-12 23:13:57,755 INFO L226 Difference]: Without dead ends: 1065 [2018-10-12 23:13:57,756 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1076, Invalid=8626, Unknown=0, NotChecked=0, Total=9702 [2018-10-12 23:13:57,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2018-10-12 23:13:57,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1039. [2018-10-12 23:13:57,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2018-10-12 23:13:57,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1039 transitions. [2018-10-12 23:13:57,763 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1039 transitions. Word has length 1010 [2018-10-12 23:13:57,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:13:57,764 INFO L481 AbstractCegarLoop]: Abstraction has 1039 states and 1039 transitions. [2018-10-12 23:13:57,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-12 23:13:57,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1039 transitions. [2018-10-12 23:13:57,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1039 [2018-10-12 23:13:57,772 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:13:57,772 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 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 23:13:57,773 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:13:57,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:13:57,773 INFO L82 PathProgramCache]: Analyzing trace with hash -2069435535, now seen corresponding path program 36 times [2018-10-12 23:13:57,774 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:13:57,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:14:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 17748 backedges. 0 proven. 17748 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:14:03,173 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:14:03,174 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-10-12 23:14:03,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-12 23:14:03,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-12 23:14:03,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2018-10-12 23:14:03,175 INFO L87 Difference]: Start difference. First operand 1039 states and 1039 transitions. Second operand 50 states. [2018-10-12 23:14:29,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 23:14:29,006 INFO L93 Difference]: Finished difference Result 1093 states and 1093 transitions. [2018-10-12 23:14:29,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-12 23:14:29,007 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 1038 [2018-10-12 23:14:29,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 23:14:29,010 INFO L225 Difference]: With dead ends: 1093 [2018-10-12 23:14:29,010 INFO L226 Difference]: Without dead ends: 1093 [2018-10-12 23:14:29,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1100, Invalid=9000, Unknown=0, NotChecked=0, Total=10100 [2018-10-12 23:14:29,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2018-10-12 23:14:29,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 1067. [2018-10-12 23:14:29,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1067 states. [2018-10-12 23:14:29,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1067 transitions. [2018-10-12 23:14:29,017 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1067 transitions. Word has length 1038 [2018-10-12 23:14:29,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 23:14:29,018 INFO L481 AbstractCegarLoop]: Abstraction has 1067 states and 1067 transitions. [2018-10-12 23:14:29,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-12 23:14:29,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1067 transitions. [2018-10-12 23:14:29,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1067 [2018-10-12 23:14:29,026 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 23:14:29,026 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 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 23:14:29,026 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 23:14:29,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 23:14:29,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1346089185, now seen corresponding path program 37 times [2018-10-12 23:14:29,027 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 23:14:29,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 23:14:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18759 backedges. 0 proven. 18759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 23:14:34,628 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 23:14:34,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-10-12 23:14:34,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-12 23:14:34,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-12 23:14:34,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2404, Unknown=0, NotChecked=0, Total=2550 [2018-10-12 23:14:34,629 INFO L87 Difference]: Start difference. First operand 1067 states and 1067 transitions. Second operand 51 states.