java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplTransformed.xml -s ../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf -i ../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_true-valid-memsafety.i_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-093a8c0 [2018-10-14 18:05:56,086 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-14 18:05:56,089 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-14 18:05:56,107 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-14 18:05:56,108 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-14 18:05:56,110 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-14 18:05:56,111 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-14 18:05:56,114 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-14 18:05:56,117 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-14 18:05:56,119 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-14 18:05:56,126 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-14 18:05:56,126 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-14 18:05:56,127 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-14 18:05:56,128 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-14 18:05:56,129 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-14 18:05:56,132 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-14 18:05:56,133 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-14 18:05:56,134 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-14 18:05:56,136 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-14 18:05:56,140 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-14 18:05:56,141 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-14 18:05:56,145 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-14 18:05:56,149 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-14 18:05:56,149 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-14 18:05:56,150 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-14 18:05:56,151 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-14 18:05:56,152 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-14 18:05:56,152 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-14 18:05:56,155 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-14 18:05:56,157 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-14 18:05:56,157 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-14 18:05:56,158 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-14 18:05:56,163 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf [2018-10-14 18:05:56,173 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-14 18:05:56,173 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-14 18:05:56,174 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-14 18:05:56,174 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-14 18:05:56,175 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-14 18:05:56,175 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-14 18:05:56,176 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-14 18:05:56,176 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-14 18:05:56,176 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-14 18:05:56,176 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-14 18:05:56,176 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-14 18:05:56,177 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-14 18:05:56,177 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-14 18:05:56,178 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-14 18:05:56,178 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-14 18:05:56,239 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-14 18:05:56,253 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-14 18:05:56,257 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-14 18:05:56,258 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-14 18:05:56,259 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-14 18:05:56,260 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_true-valid-memsafety.i_5.bpl [2018-10-14 18:05:56,260 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_true-valid-memsafety.i_5.bpl' [2018-10-14 18:05:56,341 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-14 18:05:56,343 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-14 18:05:56,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-14 18:05:56,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-14 18:05:56,345 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-14 18:05:56,375 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:05:56" (1/1) ... [2018-10-14 18:05:56,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:05:56" (1/1) ... [2018-10-14 18:05:56,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:05:56" (1/1) ... [2018-10-14 18:05:56,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:05:56" (1/1) ... [2018-10-14 18:05:56,399 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:05:56" (1/1) ... [2018-10-14 18:05:56,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:05:56" (1/1) ... [2018-10-14 18:05:56,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:05:56" (1/1) ... [2018-10-14 18:05:56,405 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-14 18:05:56,406 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-14 18:05:56,406 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-14 18:05:56,407 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-14 18:05:56,408 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:05:56" (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 [2018-10-14 18:05:56,490 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-14 18:05:56,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-14 18:05:56,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-14 18:05:57,130 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-14 18:05:57,131 INFO L202 PluginConnector]: Adding new model 960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:05:57 BoogieIcfgContainer [2018-10-14 18:05:57,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-14 18:05:57,131 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2018-10-14 18:05:57,131 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2018-10-14 18:05:57,132 INFO L276 PluginConnector]: IcfgTransformer initialized [2018-10-14 18:05:57,135 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:05:57" (1/1) ... [2018-10-14 18:05:57,143 INFO L137 apSepIcfgTransformer]: HeapSepIcfgTransformer: Starting heap partitioning [2018-10-14 18:05:57,143 INFO L138 apSepIcfgTransformer]: To be partitioned heap arrays found [#memory_int] [2018-10-14 18:05:57,183 INFO L191 apSepIcfgTransformer]: Heap separator: starting loc-array-style preprocessing [2018-10-14 18:05:57,242 INFO L219 apSepIcfgTransformer]: finished MemlocArrayUpdater [2018-10-14 18:05:57,265 INFO L282 apSepIcfgTransformer]: finished preprocessing for the equality analysis [2018-10-14 18:05:57,336 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=1) [2018-10-14 18:06:29,086 INFO L315 AbstractInterpreter]: Visited 61 different actions 87 times. Merged at 14 different actions 24 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-10-14 18:06:29,088 INFO L306 apSepIcfgTransformer]: finished equality analysis [2018-10-14 18:06:29,091 INFO L318 apSepIcfgTransformer]: Finished detection of select terms ("array reads") [2018-10-14 18:06:29,127 WARN L152 HeapPartitionManager]: No literal set constraint found for loc-array access (select |v_#locv_ULTIMATE.start_write~int_old_#memory_int_4_1_1| |v_ULTIMATE.start_write~int_#ptr.base_13|) at (assume write~int_old_#memory_int[write~int_#ptr.base := write~int_old_#memory_int[write~int_#ptr.base][write~int_#ptr.offset := write~int_#value]] == #memory_int;) [2018-10-14 18:06:29,167 INFO L232 HeapPartitionManager]: partitioning result: [2018-10-14 18:06:29,167 INFO L237 HeapPartitionManager]: location blocks for array group [#memory_int, ULTIMATE.start_write~int_old_#memory_int] [2018-10-14 18:06:29,167 INFO L246 HeapPartitionManager]: at dimension 1 [2018-10-14 18:06:29,167 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 3 [2018-10-14 18:06:29,168 INFO L248 HeapPartitionManager]: # location blocks :2 [2018-10-14 18:06:29,168 INFO L246 HeapPartitionManager]: at dimension 2 [2018-10-14 18:06:29,168 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 0 [2018-10-14 18:06:29,168 INFO L248 HeapPartitionManager]: # location blocks :0 [2018-10-14 18:06:29,168 INFO L237 HeapPartitionManager]: location blocks for array group [#memory_int, ULTIMATE.start_write~int_old_#memory_int] [2018-10-14 18:06:29,168 INFO L246 HeapPartitionManager]: at dimension 1 [2018-10-14 18:06:29,169 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 3 [2018-10-14 18:06:29,169 INFO L248 HeapPartitionManager]: # location blocks :2 [2018-10-14 18:06:29,169 INFO L246 HeapPartitionManager]: at dimension 2 [2018-10-14 18:06:29,169 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 0 [2018-10-14 18:06:29,169 INFO L248 HeapPartitionManager]: # location blocks :0 [2018-10-14 18:06:29,171 INFO L145 ransitionTransformer]: executing heap partitioning transformation [2018-10-14 18:06:29,188 INFO L202 PluginConnector]: Adding new model 960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.10 06:06:29 BasicIcfg [2018-10-14 18:06:29,189 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2018-10-14 18:06:29,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-14 18:06:29,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-14 18:06:29,194 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-14 18:06:29,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:05:56" (1/3) ... [2018-10-14 18:06:29,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cdb071c and model type 960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:06:29, skipping insertion in model container [2018-10-14 18:06:29,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:05:57" (2/3) ... [2018-10-14 18:06:29,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cdb071c and model type 960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 06:06:29, skipping insertion in model container [2018-10-14 18:06:29,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.10 06:06:29" (3/3) ... [2018-10-14 18:06:29,197 INFO L112 eAbstractionObserver]: Analyzing ICFG memPartitionedIcfg [2018-10-14 18:06:29,207 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-10-14 18:06:29,216 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-14 18:06:29,231 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-14 18:06:29,252 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-14 18:06:29,253 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-14 18:06:29,253 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-14 18:06:29,253 INFO L384 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-10-14 18:06:29,253 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-14 18:06:29,254 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-14 18:06:29,254 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-14 18:06:29,254 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-14 18:06:29,254 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-14 18:06:29,268 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2018-10-14 18:06:29,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-14 18:06:29,279 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:06:29,280 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:06:29,282 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:06:29,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:06:29,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1565987991, now seen corresponding path program 1 times [2018-10-14 18:06:29,343 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:06:29,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:06:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:06:30,225 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-14 18:06:30,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2018-10-14 18:06:30,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-14 18:06:30,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-14 18:06:30,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-10-14 18:06:30,245 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 14 states. [2018-10-14 18:06:31,146 WARN L179 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-10-14 18:06:31,296 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2018-10-14 18:06:31,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:06:31,869 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-14 18:06:31,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-14 18:06:31,871 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2018-10-14 18:06:31,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:06:31,882 INFO L225 Difference]: With dead ends: 74 [2018-10-14 18:06:31,882 INFO L226 Difference]: Without dead ends: 74 [2018-10-14 18:06:31,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2018-10-14 18:06:31,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-14 18:06:31,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2018-10-14 18:06:31,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-14 18:06:31,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-14 18:06:31,928 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 51 [2018-10-14 18:06:31,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:06:31,929 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-14 18:06:31,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-14 18:06:31,929 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-14 18:06:31,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-14 18:06:31,931 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:06:31,931 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:06:31,932 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:06:31,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:06:31,932 INFO L82 PathProgramCache]: Analyzing trace with hash -725690753, now seen corresponding path program 1 times [2018-10-14 18:06:31,934 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:06:31,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:06:32,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:06:32,718 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:06:32,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-14 18:06:32,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-14 18:06:32,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-14 18:06:32,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2018-10-14 18:06:32,721 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 17 states. [2018-10-14 18:06:34,163 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-14 18:06:34,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:06:34,315 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-14 18:06:34,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-14 18:06:34,315 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2018-10-14 18:06:34,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:06:34,318 INFO L225 Difference]: With dead ends: 86 [2018-10-14 18:06:34,318 INFO L226 Difference]: Without dead ends: 86 [2018-10-14 18:06:34,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=388, Invalid=1094, Unknown=0, NotChecked=0, Total=1482 [2018-10-14 18:06:34,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-14 18:06:34,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2018-10-14 18:06:34,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-14 18:06:34,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-14 18:06:34,330 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 63 [2018-10-14 18:06:34,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:06:34,331 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-14 18:06:34,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-14 18:06:34,331 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-14 18:06:34,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-14 18:06:34,333 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:06:34,334 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:06:34,334 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:06:34,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:06:34,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1481309287, now seen corresponding path program 2 times [2018-10-14 18:06:34,335 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:06:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:06:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:06:34,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:06:34,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-14 18:06:34,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-14 18:06:34,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-14 18:06:34,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2018-10-14 18:06:34,912 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 20 states. [2018-10-14 18:06:35,716 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2018-10-14 18:06:36,210 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-14 18:06:36,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:06:36,918 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-14 18:06:36,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-14 18:06:36,919 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2018-10-14 18:06:36,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:06:36,921 INFO L225 Difference]: With dead ends: 98 [2018-10-14 18:06:36,921 INFO L226 Difference]: Without dead ends: 98 [2018-10-14 18:06:36,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=471, Invalid=1509, Unknown=0, NotChecked=0, Total=1980 [2018-10-14 18:06:36,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-14 18:06:36,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2018-10-14 18:06:36,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-14 18:06:36,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-14 18:06:36,929 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 75 [2018-10-14 18:06:36,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:06:36,930 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-14 18:06:36,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-14 18:06:36,930 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-14 18:06:36,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-14 18:06:36,931 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:06:36,932 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:06:36,932 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:06:36,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:06:36,933 INFO L82 PathProgramCache]: Analyzing trace with hash 8750671, now seen corresponding path program 3 times [2018-10-14 18:06:36,933 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:06:36,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:06:37,440 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:06:37,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:06:37,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-14 18:06:37,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-14 18:06:37,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-14 18:06:37,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2018-10-14 18:06:37,442 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 22 states. [2018-10-14 18:06:39,204 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-14 18:06:40,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:06:40,043 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-14 18:06:40,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-14 18:06:40,044 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 87 [2018-10-14 18:06:40,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:06:40,045 INFO L225 Difference]: With dead ends: 110 [2018-10-14 18:06:40,045 INFO L226 Difference]: Without dead ends: 110 [2018-10-14 18:06:40,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=547, Invalid=1903, Unknown=0, NotChecked=0, Total=2450 [2018-10-14 18:06:40,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-14 18:06:40,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2018-10-14 18:06:40,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-14 18:06:40,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-14 18:06:40,054 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 87 [2018-10-14 18:06:40,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:06:40,054 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-14 18:06:40,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-14 18:06:40,054 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-14 18:06:40,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-14 18:06:40,056 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:06:40,056 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:06:40,057 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:06:40,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:06:40,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1727558711, now seen corresponding path program 4 times [2018-10-14 18:06:40,058 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:06:40,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:06:40,570 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:06:40,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:06:40,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-14 18:06:40,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-14 18:06:40,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-14 18:06:40,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2018-10-14 18:06:40,572 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 24 states. [2018-10-14 18:06:43,259 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2018-10-14 18:06:43,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:06:43,513 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-10-14 18:06:43,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-14 18:06:43,514 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 99 [2018-10-14 18:06:43,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:06:43,516 INFO L225 Difference]: With dead ends: 122 [2018-10-14 18:06:43,517 INFO L226 Difference]: Without dead ends: 122 [2018-10-14 18:06:43,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=623, Invalid=2347, Unknown=0, NotChecked=0, Total=2970 [2018-10-14 18:06:43,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-14 18:06:43,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 112. [2018-10-14 18:06:43,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-14 18:06:43,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-14 18:06:43,527 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 99 [2018-10-14 18:06:43,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:06:43,527 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-14 18:06:43,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-14 18:06:43,533 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-14 18:06:43,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-14 18:06:43,535 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:06:43,535 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:06:43,535 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:06:43,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:06:43,536 INFO L82 PathProgramCache]: Analyzing trace with hash 640534047, now seen corresponding path program 5 times [2018-10-14 18:06:43,538 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:06:43,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:06:44,373 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:06:44,374 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:06:44,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-14 18:06:44,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-14 18:06:44,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-14 18:06:44,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2018-10-14 18:06:44,375 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 28 states. [2018-10-14 18:06:45,988 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-14 18:06:46,140 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:06:46,434 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-14 18:06:46,596 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:06:46,776 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:06:47,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:06:48,000 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-10-14 18:06:48,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-14 18:06:48,004 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 111 [2018-10-14 18:06:48,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:06:48,005 INFO L225 Difference]: With dead ends: 134 [2018-10-14 18:06:48,006 INFO L226 Difference]: Without dead ends: 134 [2018-10-14 18:06:48,009 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1004, Invalid=3156, Unknown=0, NotChecked=0, Total=4160 [2018-10-14 18:06:48,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-14 18:06:48,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 124. [2018-10-14 18:06:48,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-14 18:06:48,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-10-14 18:06:48,016 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 111 [2018-10-14 18:06:48,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:06:48,016 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-10-14 18:06:48,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-14 18:06:48,016 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-10-14 18:06:48,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-14 18:06:48,018 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:06:48,018 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:06:48,019 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:06:48,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:06:48,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1504672775, now seen corresponding path program 6 times [2018-10-14 18:06:48,020 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:06:48,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:06:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:06:48,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:06:48,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-10-14 18:06:48,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-14 18:06:48,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-14 18:06:48,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2018-10-14 18:06:48,761 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 30 states. [2018-10-14 18:06:51,219 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-14 18:06:51,384 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:06:51,525 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-14 18:06:51,756 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-14 18:06:51,919 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:06:52,059 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-14 18:06:52,441 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-14 18:06:53,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:06:53,231 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-10-14 18:06:53,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-14 18:06:53,241 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 123 [2018-10-14 18:06:53,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:06:53,242 INFO L225 Difference]: With dead ends: 146 [2018-10-14 18:06:53,242 INFO L226 Difference]: Without dead ends: 146 [2018-10-14 18:06:53,244 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1064, Invalid=3628, Unknown=0, NotChecked=0, Total=4692 [2018-10-14 18:06:53,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-14 18:06:53,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 136. [2018-10-14 18:06:53,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-14 18:06:53,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-10-14 18:06:53,250 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 123 [2018-10-14 18:06:53,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:06:53,251 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-10-14 18:06:53,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-14 18:06:53,251 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-10-14 18:06:53,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-14 18:06:53,253 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:06:53,253 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:06:53,253 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:06:53,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:06:53,254 INFO L82 PathProgramCache]: Analyzing trace with hash 503813615, now seen corresponding path program 7 times [2018-10-14 18:06:53,257 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:06:53,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:06:54,614 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:06:54,615 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:06:54,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-14 18:06:54,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-14 18:06:54,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-14 18:06:54,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2018-10-14 18:06:54,616 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 32 states. [2018-10-14 18:06:55,295 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-14 18:06:56,630 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-14 18:06:56,808 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:06:57,216 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:06:57,720 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:06:58,864 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:06:59,113 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2018-10-14 18:07:00,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:07:00,115 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-10-14 18:07:00,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-14 18:07:00,116 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 135 [2018-10-14 18:07:00,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:07:00,117 INFO L225 Difference]: With dead ends: 158 [2018-10-14 18:07:00,117 INFO L226 Difference]: Without dead ends: 158 [2018-10-14 18:07:00,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1413, Invalid=4439, Unknown=0, NotChecked=0, Total=5852 [2018-10-14 18:07:00,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-14 18:07:00,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2018-10-14 18:07:00,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-14 18:07:00,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-14 18:07:00,126 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 135 [2018-10-14 18:07:00,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:07:00,126 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-14 18:07:00,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-14 18:07:00,126 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-14 18:07:00,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-14 18:07:00,128 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:07:00,128 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:07:00,128 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:07:00,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:07:00,129 INFO L82 PathProgramCache]: Analyzing trace with hash 281023447, now seen corresponding path program 8 times [2018-10-14 18:07:00,129 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:07:00,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:07:01,165 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:07:01,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:07:01,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-14 18:07:01,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-14 18:07:01,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-14 18:07:01,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2018-10-14 18:07:01,167 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 32 states. [2018-10-14 18:07:06,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:07:06,490 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2018-10-14 18:07:06,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-14 18:07:06,490 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 147 [2018-10-14 18:07:06,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:07:06,492 INFO L225 Difference]: With dead ends: 170 [2018-10-14 18:07:06,492 INFO L226 Difference]: Without dead ends: 170 [2018-10-14 18:07:06,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=927, Invalid=4623, Unknown=0, NotChecked=0, Total=5550 [2018-10-14 18:07:06,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-14 18:07:06,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2018-10-14 18:07:06,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-14 18:07:06,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-10-14 18:07:06,499 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 147 [2018-10-14 18:07:06,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:07:06,499 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-10-14 18:07:06,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-14 18:07:06,500 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-10-14 18:07:06,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-14 18:07:06,501 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:07:06,501 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:07:06,502 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:07:06,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:07:06,502 INFO L82 PathProgramCache]: Analyzing trace with hash -798820929, now seen corresponding path program 9 times [2018-10-14 18:07:06,503 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:07:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:07:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:07:07,704 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:07:07,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-10-14 18:07:07,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-14 18:07:07,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-14 18:07:07,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2018-10-14 18:07:07,706 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 36 states. [2018-10-14 18:07:09,603 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-14 18:07:12,349 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:07:13,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:07:13,894 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2018-10-14 18:07:13,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-14 18:07:13,895 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 159 [2018-10-14 18:07:13,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:07:13,896 INFO L225 Difference]: With dead ends: 182 [2018-10-14 18:07:13,896 INFO L226 Difference]: Without dead ends: 182 [2018-10-14 18:07:13,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1890, Invalid=5942, Unknown=0, NotChecked=0, Total=7832 [2018-10-14 18:07:13,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-14 18:07:13,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 172. [2018-10-14 18:07:13,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-10-14 18:07:13,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2018-10-14 18:07:13,902 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 159 [2018-10-14 18:07:13,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:07:13,903 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2018-10-14 18:07:13,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-14 18:07:13,903 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2018-10-14 18:07:13,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-14 18:07:13,904 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:07:13,905 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:07:13,905 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:07:13,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:07:13,905 INFO L82 PathProgramCache]: Analyzing trace with hash 2088385447, now seen corresponding path program 10 times [2018-10-14 18:07:13,906 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:07:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:07:14,837 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:07:14,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:07:14,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-14 18:07:14,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-14 18:07:14,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-14 18:07:14,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2018-10-14 18:07:14,839 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 38 states. [2018-10-14 18:07:17,282 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-14 18:07:17,462 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:17,892 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:18,037 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:18,444 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:18,594 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:19,154 WARN L179 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:19,308 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:19,730 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:19,893 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:20,336 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:21,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:07:21,852 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2018-10-14 18:07:21,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-14 18:07:21,853 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 171 [2018-10-14 18:07:21,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:07:21,855 INFO L225 Difference]: With dead ends: 194 [2018-10-14 18:07:21,855 INFO L226 Difference]: Without dead ends: 194 [2018-10-14 18:07:21,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1966, Invalid=6590, Unknown=0, NotChecked=0, Total=8556 [2018-10-14 18:07:21,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-14 18:07:21,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 184. [2018-10-14 18:07:21,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-14 18:07:21,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2018-10-14 18:07:21,862 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 171 [2018-10-14 18:07:21,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:07:21,863 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2018-10-14 18:07:21,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-14 18:07:21,863 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2018-10-14 18:07:21,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-14 18:07:21,864 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:07:21,864 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:07:21,865 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:07:21,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:07:21,865 INFO L82 PathProgramCache]: Analyzing trace with hash 898622863, now seen corresponding path program 11 times [2018-10-14 18:07:21,866 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:07:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:07:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:07:23,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:07:23,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-14 18:07:23,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-14 18:07:23,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-14 18:07:23,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1349, Unknown=0, NotChecked=0, Total=1560 [2018-10-14 18:07:23,102 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand 40 states. [2018-10-14 18:07:25,091 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-14 18:07:26,123 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:07:26,651 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:07:27,257 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:07:27,442 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:07:28,503 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:07:29,726 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:07:30,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:07:30,762 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2018-10-14 18:07:30,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-14 18:07:30,762 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 183 [2018-10-14 18:07:30,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:07:30,765 INFO L225 Difference]: With dead ends: 206 [2018-10-14 18:07:30,765 INFO L226 Difference]: Without dead ends: 206 [2018-10-14 18:07:30,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=2435, Invalid=7665, Unknown=0, NotChecked=0, Total=10100 [2018-10-14 18:07:30,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-10-14 18:07:30,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 196. [2018-10-14 18:07:30,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-14 18:07:30,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2018-10-14 18:07:30,771 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 183 [2018-10-14 18:07:30,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:07:30,772 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2018-10-14 18:07:30,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-14 18:07:30,772 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2018-10-14 18:07:30,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-10-14 18:07:30,773 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:07:30,773 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:07:30,773 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:07:30,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:07:30,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1657932937, now seen corresponding path program 12 times [2018-10-14 18:07:30,774 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:07:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:07:32,013 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:07:32,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:07:32,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-10-14 18:07:32,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-14 18:07:32,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-14 18:07:32,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2018-10-14 18:07:32,015 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 42 states. [2018-10-14 18:07:34,245 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2018-10-14 18:07:35,470 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-14 18:07:35,626 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2018-10-14 18:07:36,158 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-14 18:07:36,341 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:07:36,849 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:07:37,032 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:07:37,499 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:07:37,751 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:07:37,943 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-14 18:07:38,296 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:07:38,487 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-14 18:07:38,979 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-14 18:07:39,165 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-14 18:07:39,507 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-14 18:07:39,680 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-14 18:07:40,013 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2018-10-14 18:07:40,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:07:40,957 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2018-10-14 18:07:40,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-14 18:07:40,957 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 195 [2018-10-14 18:07:40,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:07:40,959 INFO L225 Difference]: With dead ends: 218 [2018-10-14 18:07:40,959 INFO L226 Difference]: Without dead ends: 218 [2018-10-14 18:07:40,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2105 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=2185, Invalid=8321, Unknown=0, NotChecked=0, Total=10506 [2018-10-14 18:07:40,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-10-14 18:07:40,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 208. [2018-10-14 18:07:40,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-14 18:07:40,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2018-10-14 18:07:40,964 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 195 [2018-10-14 18:07:40,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:07:40,964 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2018-10-14 18:07:40,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-14 18:07:40,965 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2018-10-14 18:07:40,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-14 18:07:40,966 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:07:40,966 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:07:40,966 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:07:40,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:07:40,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1440638303, now seen corresponding path program 13 times [2018-10-14 18:07:40,967 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:07:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:07:42,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:07:42,598 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:07:42,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-14 18:07:42,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-14 18:07:42,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-14 18:07:42,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1625, Unknown=0, NotChecked=0, Total=1892 [2018-10-14 18:07:42,600 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 44 states. [2018-10-14 18:07:44,876 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-14 18:07:46,076 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:07:46,485 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:07:51,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:07:51,782 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2018-10-14 18:07:51,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-14 18:07:51,783 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 207 [2018-10-14 18:07:51,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:07:51,785 INFO L225 Difference]: With dead ends: 230 [2018-10-14 18:07:51,785 INFO L226 Difference]: Without dead ends: 230 [2018-10-14 18:07:51,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2716 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=3048, Invalid=9608, Unknown=0, NotChecked=0, Total=12656 [2018-10-14 18:07:51,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-10-14 18:07:51,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 220. [2018-10-14 18:07:51,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-14 18:07:51,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 220 transitions. [2018-10-14 18:07:51,790 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 220 transitions. Word has length 207 [2018-10-14 18:07:51,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:07:51,791 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 220 transitions. [2018-10-14 18:07:51,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-14 18:07:51,791 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 220 transitions. [2018-10-14 18:07:51,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-14 18:07:51,792 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:07:51,792 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:07:51,792 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:07:51,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:07:51,792 INFO L82 PathProgramCache]: Analyzing trace with hash -2094318777, now seen corresponding path program 14 times [2018-10-14 18:07:51,793 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:07:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:07:53,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:07:53,148 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:07:53,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-14 18:07:53,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-14 18:07:53,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-14 18:07:53,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1799, Unknown=0, NotChecked=0, Total=2070 [2018-10-14 18:07:53,149 INFO L87 Difference]: Start difference. First operand 220 states and 220 transitions. Second operand 46 states. [2018-10-14 18:07:55,932 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:56,364 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:56,895 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:58,005 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:58,217 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:58,712 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:58,876 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:59,325 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:59,509 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:00,025 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:00,206 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:01,364 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:02,037 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-14 18:08:03,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:08:03,011 INFO L93 Difference]: Finished difference Result 242 states and 242 transitions. [2018-10-14 18:08:03,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-14 18:08:03,012 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 219 [2018-10-14 18:08:03,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:08:03,013 INFO L225 Difference]: With dead ends: 242 [2018-10-14 18:08:03,014 INFO L226 Difference]: Without dead ends: 242 [2018-10-14 18:08:03,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2906 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=3140, Invalid=10432, Unknown=0, NotChecked=0, Total=13572 [2018-10-14 18:08:03,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-10-14 18:08:03,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 232. [2018-10-14 18:08:03,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-10-14 18:08:03,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2018-10-14 18:08:03,019 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 219 [2018-10-14 18:08:03,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:08:03,020 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2018-10-14 18:08:03,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-14 18:08:03,020 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2018-10-14 18:08:03,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-10-14 18:08:03,021 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:08:03,021 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:08:03,022 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:08:03,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:08:03,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1235121455, now seen corresponding path program 15 times [2018-10-14 18:08:03,023 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:08:03,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:08:04,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:08:04,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:08:04,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-14 18:08:04,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-14 18:08:04,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-14 18:08:04,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1925, Unknown=0, NotChecked=0, Total=2256 [2018-10-14 18:08:04,490 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand 48 states. [2018-10-14 18:08:08,339 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:08:08,516 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:08:09,119 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:08:09,561 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:08:13,525 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2018-10-14 18:08:13,783 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2018-10-14 18:08:14,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:08:14,618 INFO L93 Difference]: Finished difference Result 254 states and 254 transitions. [2018-10-14 18:08:14,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-14 18:08:14,619 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 231 [2018-10-14 18:08:14,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:08:14,620 INFO L225 Difference]: With dead ends: 254 [2018-10-14 18:08:14,620 INFO L226 Difference]: Without dead ends: 254 [2018-10-14 18:08:14,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3423 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=3729, Invalid=11771, Unknown=0, NotChecked=0, Total=15500 [2018-10-14 18:08:14,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-10-14 18:08:14,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 244. [2018-10-14 18:08:14,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-10-14 18:08:14,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 244 transitions. [2018-10-14 18:08:14,626 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 244 transitions. Word has length 231 [2018-10-14 18:08:14,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:08:14,627 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 244 transitions. [2018-10-14 18:08:14,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-14 18:08:14,627 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 244 transitions. [2018-10-14 18:08:14,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-14 18:08:14,628 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:08:14,628 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:08:14,628 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:08:14,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:08:14,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1321341719, now seen corresponding path program 16 times [2018-10-14 18:08:14,629 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:08:14,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:08:16,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:08:16,391 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:08:16,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-14 18:08:16,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-14 18:08:16,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-14 18:08:16,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2122, Unknown=0, NotChecked=0, Total=2256 [2018-10-14 18:08:16,392 INFO L87 Difference]: Start difference. First operand 244 states and 244 transitions. Second operand 48 states. [2018-10-14 18:08:27,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:08:27,486 INFO L93 Difference]: Finished difference Result 266 states and 266 transitions. [2018-10-14 18:08:27,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-14 18:08:27,486 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 243 [2018-10-14 18:08:27,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:08:27,489 INFO L225 Difference]: With dead ends: 266 [2018-10-14 18:08:27,489 INFO L226 Difference]: Without dead ends: 266 [2018-10-14 18:08:27,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2323 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1535, Invalid=11575, Unknown=0, NotChecked=0, Total=13110 [2018-10-14 18:08:27,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-10-14 18:08:27,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 256. [2018-10-14 18:08:27,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-10-14 18:08:27,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 256 transitions. [2018-10-14 18:08:27,495 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 256 transitions. Word has length 243 [2018-10-14 18:08:27,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:08:27,496 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 256 transitions. [2018-10-14 18:08:27,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-14 18:08:27,496 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 256 transitions. [2018-10-14 18:08:27,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-10-14 18:08:27,497 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:08:27,498 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:08:27,498 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:08:27,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:08:27,498 INFO L82 PathProgramCache]: Analyzing trace with hash 958403839, now seen corresponding path program 17 times [2018-10-14 18:08:27,499 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:08:27,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:08:30,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:08:30,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:08:30,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-10-14 18:08:30,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-14 18:08:30,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-14 18:08:30,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=2249, Unknown=0, NotChecked=0, Total=2652 [2018-10-14 18:08:30,081 INFO L87 Difference]: Start difference. First operand 256 states and 256 transitions. Second operand 52 states. [2018-10-14 18:08:34,110 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:08:34,294 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:08:39,025 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:08:42,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:08:42,906 INFO L93 Difference]: Finished difference Result 278 states and 278 transitions. [2018-10-14 18:08:42,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-14 18:08:42,908 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 255 [2018-10-14 18:08:42,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:08:42,913 INFO L225 Difference]: With dead ends: 278 [2018-10-14 18:08:42,913 INFO L226 Difference]: Without dead ends: 278 [2018-10-14 18:08:42,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4214 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=4478, Invalid=14154, Unknown=0, NotChecked=0, Total=18632 [2018-10-14 18:08:42,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-10-14 18:08:42,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 268. [2018-10-14 18:08:42,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-10-14 18:08:42,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 268 transitions. [2018-10-14 18:08:42,920 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 268 transitions. Word has length 255 [2018-10-14 18:08:42,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:08:42,920 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 268 transitions. [2018-10-14 18:08:42,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-14 18:08:42,921 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 268 transitions. [2018-10-14 18:08:42,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-10-14 18:08:42,922 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:08:42,922 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:08:42,922 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:08:42,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:08:42,923 INFO L82 PathProgramCache]: Analyzing trace with hash 809663207, now seen corresponding path program 18 times [2018-10-14 18:08:42,923 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:08:42,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:08:44,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:08:44,841 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:08:44,841 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-10-14 18:08:44,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-14 18:08:44,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-14 18:08:44,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2455, Unknown=0, NotChecked=0, Total=2862 [2018-10-14 18:08:44,842 INFO L87 Difference]: Start difference. First operand 268 states and 268 transitions. Second operand 54 states. [2018-10-14 18:08:47,700 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-14 18:08:47,840 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:48,304 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:48,863 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:49,022 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:49,517 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:49,715 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:50,163 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:50,329 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:50,789 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:50,966 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:51,435 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:51,620 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:52,098 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:52,280 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:52,760 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:52,948 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:53,435 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:53,623 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:54,109 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:54,309 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:54,549 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-14 18:08:54,949 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:55,147 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:55,662 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:55,874 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:56,405 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:58,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:08:58,270 INFO L93 Difference]: Finished difference Result 290 states and 290 transitions. [2018-10-14 18:08:58,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-14 18:08:58,270 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 267 [2018-10-14 18:08:58,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:08:58,272 INFO L225 Difference]: With dead ends: 290 [2018-10-14 18:08:58,272 INFO L226 Difference]: Without dead ends: 290 [2018-10-14 18:08:58,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4448 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=4586, Invalid=15154, Unknown=0, NotChecked=0, Total=19740 [2018-10-14 18:08:58,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-10-14 18:08:58,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 280. [2018-10-14 18:08:58,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-10-14 18:08:58,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 280 transitions. [2018-10-14 18:08:58,279 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 280 transitions. Word has length 267 [2018-10-14 18:08:58,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:08:58,280 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 280 transitions. [2018-10-14 18:08:58,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-14 18:08:58,280 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 280 transitions. [2018-10-14 18:08:58,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-10-14 18:08:58,281 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:08:58,282 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:08:58,282 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:08:58,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:08:58,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1555252431, now seen corresponding path program 19 times [2018-10-14 18:08:58,283 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:08:58,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:09:00,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:09:00,279 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:09:00,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-10-14 18:09:00,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-14 18:09:00,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-14 18:09:00,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=2597, Unknown=0, NotChecked=0, Total=3080 [2018-10-14 18:09:00,281 INFO L87 Difference]: Start difference. First operand 280 states and 280 transitions. Second operand 56 states. [2018-10-14 18:09:02,740 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-14 18:09:03,322 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:09:03,465 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:09:04,552 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:09:04,897 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-14 18:09:06,566 WARN L179 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-14 18:09:09,967 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:09:11,394 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:09:15,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:09:15,092 INFO L93 Difference]: Finished difference Result 302 states and 302 transitions. [2018-10-14 18:09:15,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-14 18:09:15,092 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 279 [2018-10-14 18:09:15,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:09:15,094 INFO L225 Difference]: With dead ends: 302 [2018-10-14 18:09:15,094 INFO L226 Difference]: Without dead ends: 302 [2018-10-14 18:09:15,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5089 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=5295, Invalid=16757, Unknown=0, NotChecked=0, Total=22052 [2018-10-14 18:09:15,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2018-10-14 18:09:15,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 292. [2018-10-14 18:09:15,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-10-14 18:09:15,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 292 transitions. [2018-10-14 18:09:15,100 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 292 transitions. Word has length 279 [2018-10-14 18:09:15,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:09:15,101 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 292 transitions. [2018-10-14 18:09:15,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-14 18:09:15,101 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 292 transitions. [2018-10-14 18:09:15,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-10-14 18:09:15,102 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:09:15,103 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:09:15,103 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:09:15,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:09:15,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1744597687, now seen corresponding path program 20 times [2018-10-14 18:09:15,104 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:09:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:09:16,283 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-14 18:09:18,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:09:18,184 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:09:18,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-10-14 18:09:18,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-14 18:09:18,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-14 18:09:18,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=2891, Unknown=0, NotChecked=0, Total=3306 [2018-10-14 18:09:18,186 INFO L87 Difference]: Start difference. First operand 292 states and 292 transitions. Second operand 58 states. [2018-10-14 18:09:22,135 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-14 18:09:22,283 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2018-10-14 18:09:22,848 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-14 18:09:23,023 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:23,552 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:23,725 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:24,187 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:24,379 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:24,864 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:25,061 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:25,286 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-14 18:09:25,494 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-14 18:09:25,688 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:25,882 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:26,392 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:26,593 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:27,114 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:27,320 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:27,848 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:28,062 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:28,605 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:28,832 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:29,393 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:29,628 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:30,233 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:30,513 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:31,112 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:31,358 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-14 18:09:31,963 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-14 18:09:32,203 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-14 18:09:32,637 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-14 18:09:32,869 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-14 18:09:33,293 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2018-10-14 18:09:33,515 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2018-10-14 18:09:34,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:09:34,516 INFO L93 Difference]: Finished difference Result 314 states and 314 transitions. [2018-10-14 18:09:34,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-14 18:09:34,516 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 291 [2018-10-14 18:09:34,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:09:34,518 INFO L225 Difference]: With dead ends: 314 [2018-10-14 18:09:34,518 INFO L226 Difference]: Without dead ends: 314 [2018-10-14 18:09:34,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5093 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=4885, Invalid=17765, Unknown=0, NotChecked=0, Total=22650 [2018-10-14 18:09:34,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2018-10-14 18:09:34,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 304. [2018-10-14 18:09:34,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-10-14 18:09:34,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 304 transitions. [2018-10-14 18:09:34,524 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 304 transitions. Word has length 291 [2018-10-14 18:09:34,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:09:34,524 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 304 transitions. [2018-10-14 18:09:34,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-14 18:09:34,525 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 304 transitions. [2018-10-14 18:09:34,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-10-14 18:09:34,526 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:09:34,526 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:09:34,527 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:09:34,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:09:34,527 INFO L82 PathProgramCache]: Analyzing trace with hash -56097633, now seen corresponding path program 21 times [2018-10-14 18:09:34,528 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:09:34,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:09:36,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:09:36,767 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:09:36,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-10-14 18:09:36,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-14 18:09:36,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-14 18:09:36,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=2969, Unknown=0, NotChecked=0, Total=3540 [2018-10-14 18:09:36,769 INFO L87 Difference]: Start difference. First operand 304 states and 304 transitions. Second operand 60 states. [2018-10-14 18:09:40,536 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:09:45,624 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-14 18:09:50,753 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2018-10-14 18:09:52,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:09:52,033 INFO L93 Difference]: Finished difference Result 326 states and 326 transitions. [2018-10-14 18:09:52,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-14 18:09:52,036 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 303 [2018-10-14 18:09:52,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:09:52,038 INFO L225 Difference]: With dead ends: 326 [2018-10-14 18:09:52,038 INFO L226 Difference]: Without dead ends: 326 [2018-10-14 18:09:52,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6048 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=6180, Invalid=19580, Unknown=0, NotChecked=0, Total=25760 [2018-10-14 18:09:52,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2018-10-14 18:09:52,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 316. [2018-10-14 18:09:52,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-10-14 18:09:52,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 316 transitions. [2018-10-14 18:09:52,042 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 316 transitions. Word has length 303 [2018-10-14 18:09:52,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:09:52,043 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 316 transitions. [2018-10-14 18:09:52,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-14 18:09:52,043 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 316 transitions. [2018-10-14 18:09:52,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-10-14 18:09:52,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:09:52,045 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:09:52,045 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:09:52,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:09:52,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1178598023, now seen corresponding path program 22 times [2018-10-14 18:09:52,046 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:09:52,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:09:54,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:09:54,739 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:09:54,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-10-14 18:09:54,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-14 18:09:54,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-14 18:09:54,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=3207, Unknown=0, NotChecked=0, Total=3782 [2018-10-14 18:09:54,740 INFO L87 Difference]: Start difference. First operand 316 states and 316 transitions. Second operand 62 states. [2018-10-14 18:09:57,830 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:09:58,284 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:09:58,422 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:09:58,847 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:09:59,416 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:09:59,575 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:10:00,013 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:00,174 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:10:00,616 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:01,121 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-14 18:10:01,305 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:01,478 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:10:01,955 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:02,135 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:10:02,622 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:03,299 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:03,493 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:10:04,011 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:04,209 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:10:04,925 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:10:05,453 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:05,665 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:10:06,274 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:06,540 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:10:07,104 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:07,326 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:10:07,887 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:08,681 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:09,510 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:09,755 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-14 18:10:10,362 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-14 18:10:11,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:10:11,800 INFO L93 Difference]: Finished difference Result 338 states and 338 transitions. [2018-10-14 18:10:11,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-14 18:10:11,800 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 315 [2018-10-14 18:10:11,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:10:11,801 INFO L225 Difference]: With dead ends: 338 [2018-10-14 18:10:11,802 INFO L226 Difference]: Without dead ends: 338 [2018-10-14 18:10:11,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6326 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=6304, Invalid=20756, Unknown=0, NotChecked=0, Total=27060 [2018-10-14 18:10:11,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-10-14 18:10:11,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 328. [2018-10-14 18:10:11,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-10-14 18:10:11,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 328 transitions. [2018-10-14 18:10:11,808 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 328 transitions. Word has length 315 [2018-10-14 18:10:11,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:10:11,808 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 328 transitions. [2018-10-14 18:10:11,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-14 18:10:11,808 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 328 transitions. [2018-10-14 18:10:11,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-10-14 18:10:11,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:10:11,810 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:10:11,810 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:10:11,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:10:11,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1900958831, now seen corresponding path program 23 times [2018-10-14 18:10:11,811 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:10:11,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:10:14,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:10:14,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:10:14,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-10-14 18:10:14,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-14 18:10:14,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-14 18:10:14,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=667, Invalid=3365, Unknown=0, NotChecked=0, Total=4032 [2018-10-14 18:10:14,368 INFO L87 Difference]: Start difference. First operand 328 states and 328 transitions. Second operand 64 states. [2018-10-14 18:10:21,935 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:10:31,716 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2018-10-14 18:10:32,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:10:32,635 INFO L93 Difference]: Finished difference Result 350 states and 350 transitions. [2018-10-14 18:10:32,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-10-14 18:10:32,636 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 327 [2018-10-14 18:10:32,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:10:32,637 INFO L225 Difference]: With dead ends: 350 [2018-10-14 18:10:32,637 INFO L226 Difference]: Without dead ends: 350 [2018-10-14 18:10:32,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7091 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=7133, Invalid=22623, Unknown=0, NotChecked=0, Total=29756 [2018-10-14 18:10:32,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2018-10-14 18:10:32,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 340. [2018-10-14 18:10:32,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-10-14 18:10:32,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 340 transitions. [2018-10-14 18:10:32,644 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 340 transitions. Word has length 327 [2018-10-14 18:10:32,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:10:32,644 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 340 transitions. [2018-10-14 18:10:32,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-14 18:10:32,644 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 340 transitions. [2018-10-14 18:10:32,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-10-14 18:10:32,646 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:10:32,647 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:10:32,647 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:10:32,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:10:32,647 INFO L82 PathProgramCache]: Analyzing trace with hash 727519831, now seen corresponding path program 24 times [2018-10-14 18:10:32,648 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:10:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:10:35,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:10:35,419 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:10:35,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-10-14 18:10:35,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-14 18:10:35,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-14 18:10:35,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=3859, Unknown=0, NotChecked=0, Total=4290 [2018-10-14 18:10:35,421 INFO L87 Difference]: Start difference. First operand 340 states and 340 transitions. Second operand 66 states. [2018-10-14 18:10:39,230 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-14 18:10:39,404 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2018-10-14 18:10:39,964 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2018-10-14 18:10:40,142 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 49 [2018-10-14 18:10:40,716 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 49 [2018-10-14 18:10:40,906 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 49 [2018-10-14 18:10:41,500 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 49 [2018-10-14 18:10:41,704 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 49 [2018-10-14 18:10:42,097 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 43 [2018-10-14 18:10:42,437 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 49 [2018-10-14 18:10:42,660 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 49 [2018-10-14 18:10:43,014 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 49 [2018-10-14 18:10:43,326 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 56 [2018-10-14 18:10:43,581 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 18:10:43,764 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 18:10:43,985 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 18:10:44,225 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 18:10:44,469 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 18:10:44,651 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 18:10:44,836 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 18:10:45,088 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 18:10:45,346 WARN L179 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 18:10:45,530 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 18:10:45,724 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 18:10:45,987 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 18:10:46,256 WARN L179 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 18:10:46,443 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 18:10:46,641 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 18:10:46,897 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 18:10:47,210 WARN L179 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 18:10:47,459 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 18:10:47,656 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 18:10:47,923 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 18:10:48,191 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 18:10:48,391 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 18:10:48,594 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 18:10:48,873 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 18:10:49,166 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 18:10:49,371 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 18:10:49,582 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 18:10:49,867 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 18:10:50,155 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 58 [2018-10-14 18:10:50,363 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2018-10-14 18:10:50,568 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2018-10-14 18:10:50,852 WARN L179 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 57 [2018-10-14 18:10:51,141 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 58 [2018-10-14 18:10:51,346 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2018-10-14 18:10:51,654 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 57 [2018-10-14 18:10:51,929 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 58 [2018-10-14 18:10:52,144 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 50 [2018-10-14 18:10:52,481 WARN L179 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 57 [2018-10-14 18:10:52,749 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2018-10-14 18:10:53,215 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2018-10-14 18:10:53,468 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2018-10-14 18:10:53,916 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2018-10-14 18:10:54,157 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2018-10-14 18:10:54,595 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2018-10-14 18:10:54,842 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2018-10-14 18:10:56,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:10:56,501 INFO L93 Difference]: Finished difference Result 362 states and 362 transitions. [2018-10-14 18:10:56,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-14 18:10:56,501 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 339 [2018-10-14 18:10:56,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:10:56,502 INFO L225 Difference]: With dead ends: 362 [2018-10-14 18:10:56,502 INFO L226 Difference]: Without dead ends: 362 [2018-10-14 18:10:56,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6491 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=5471, Invalid=23599, Unknown=0, NotChecked=0, Total=29070 [2018-10-14 18:10:56,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2018-10-14 18:10:56,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 352. [2018-10-14 18:10:56,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-10-14 18:10:56,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 352 transitions. [2018-10-14 18:10:56,508 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 352 transitions. Word has length 339 [2018-10-14 18:10:56,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:10:56,509 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 352 transitions. [2018-10-14 18:10:56,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-14 18:10:56,509 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 352 transitions. [2018-10-14 18:10:56,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-10-14 18:10:56,511 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:10:56,511 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:10:56,511 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:10:56,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:10:56,511 INFO L82 PathProgramCache]: Analyzing trace with hash 586560575, now seen corresponding path program 25 times [2018-10-14 18:10:56,512 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:10:56,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:10:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:10:59,344 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:10:59,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-10-14 18:10:59,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-14 18:10:59,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-14 18:10:59,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=771, Invalid=3785, Unknown=0, NotChecked=0, Total=4556 [2018-10-14 18:10:59,346 INFO L87 Difference]: Start difference. First operand 352 states and 352 transitions. Second operand 68 states. [2018-10-14 18:11:02,499 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-14 18:11:03,937 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:11:05,729 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:11:06,358 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:11:07,010 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:11:07,741 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:11:08,440 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:11:10,555 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:11:12,652 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-14 18:11:12,909 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:11:17,863 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:11:19,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:11:19,475 INFO L93 Difference]: Finished difference Result 374 states and 374 transitions. [2018-10-14 18:11:19,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-10-14 18:11:19,475 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 351 [2018-10-14 18:11:19,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:11:19,477 INFO L225 Difference]: With dead ends: 374 [2018-10-14 18:11:19,477 INFO L226 Difference]: Without dead ends: 374 [2018-10-14 18:11:19,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8218 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=8154, Invalid=25886, Unknown=0, NotChecked=0, Total=34040 [2018-10-14 18:11:19,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2018-10-14 18:11:19,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 364. [2018-10-14 18:11:19,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-10-14 18:11:19,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 364 transitions. [2018-10-14 18:11:19,484 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 364 transitions. Word has length 351 [2018-10-14 18:11:19,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:11:19,485 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 364 transitions. [2018-10-14 18:11:19,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-14 18:11:19,485 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 364 transitions. [2018-10-14 18:11:19,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-10-14 18:11:19,487 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:11:19,487 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:11:19,487 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:11:19,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:11:19,488 INFO L82 PathProgramCache]: Analyzing trace with hash -2019313113, now seen corresponding path program 26 times [2018-10-14 18:11:19,488 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:11:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:11:22,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:11:22,663 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:11:22,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-10-14 18:11:22,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-14 18:11:22,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-14 18:11:22,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=775, Invalid=4055, Unknown=0, NotChecked=0, Total=4830 [2018-10-14 18:11:22,665 INFO L87 Difference]: Start difference. First operand 364 states and 364 transitions. Second operand 70 states. [2018-10-14 18:11:25,746 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:25,888 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:26,313 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:26,459 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:27,491 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:27,648 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:28,143 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:28,342 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:28,804 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:28,977 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:29,465 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:29,647 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:30,140 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:30,327 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:30,830 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:31,030 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:31,561 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:31,775 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:32,314 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:32,531 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:33,096 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:33,361 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:33,960 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:34,191 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:34,773 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:35,003 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:35,590 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:35,823 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:36,427 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:36,680 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:37,315 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:37,571 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:38,208 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:38,511 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:39,170 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:39,426 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:40,074 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:40,344 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:41,006 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:41,281 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-14 18:11:41,932 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-14 18:11:43,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:11:43,310 INFO L93 Difference]: Finished difference Result 386 states and 386 transitions. [2018-10-14 18:11:43,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-10-14 18:11:43,311 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 363 [2018-10-14 18:11:43,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:11:43,313 INFO L225 Difference]: With dead ends: 386 [2018-10-14 18:11:43,313 INFO L226 Difference]: Without dead ends: 386 [2018-10-14 18:11:43,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8540 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=8294, Invalid=27238, Unknown=0, NotChecked=0, Total=35532 [2018-10-14 18:11:43,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2018-10-14 18:11:43,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 376. [2018-10-14 18:11:43,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2018-10-14 18:11:43,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 376 transitions. [2018-10-14 18:11:43,320 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 376 transitions. Word has length 363 [2018-10-14 18:11:43,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:11:43,320 INFO L481 AbstractCegarLoop]: Abstraction has 376 states and 376 transitions. [2018-10-14 18:11:43,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-14 18:11:43,321 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 376 transitions. [2018-10-14 18:11:43,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-10-14 18:11:43,322 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:11:43,323 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:11:43,323 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:11:43,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:11:43,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1980783601, now seen corresponding path program 27 times [2018-10-14 18:11:43,324 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:11:43,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:11:46,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:11:46,083 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:11:46,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-10-14 18:11:46,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-14 18:11:46,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-14 18:11:46,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=883, Invalid=4229, Unknown=0, NotChecked=0, Total=5112 [2018-10-14 18:11:46,085 INFO L87 Difference]: Start difference. First operand 376 states and 376 transitions. Second operand 72 states. [2018-10-14 18:11:48,468 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2018-10-14 18:11:53,749 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:11:53,958 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:11:58,814 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:12:07,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:12:07,990 INFO L93 Difference]: Finished difference Result 398 states and 398 transitions. [2018-10-14 18:12:07,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-14 18:12:07,991 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 375 [2018-10-14 18:12:07,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:12:07,993 INFO L225 Difference]: With dead ends: 398 [2018-10-14 18:12:07,993 INFO L226 Difference]: Without dead ends: 398 [2018-10-14 18:12:07,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9429 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=9243, Invalid=29369, Unknown=0, NotChecked=0, Total=38612 [2018-10-14 18:12:07,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2018-10-14 18:12:07,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 388. [2018-10-14 18:12:07,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-10-14 18:12:08,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 388 transitions. [2018-10-14 18:12:08,000 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 388 transitions. Word has length 375 [2018-10-14 18:12:08,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:12:08,001 INFO L481 AbstractCegarLoop]: Abstraction has 388 states and 388 transitions. [2018-10-14 18:12:08,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-14 18:12:08,001 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 388 transitions. [2018-10-14 18:12:08,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-10-14 18:12:08,003 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:12:08,004 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:12:08,004 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:12:08,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:12:08,004 INFO L82 PathProgramCache]: Analyzing trace with hash -614206985, now seen corresponding path program 28 times [2018-10-14 18:12:08,005 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:12:08,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:12:11,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:12:11,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:12:11,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-10-14 18:12:11,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-14 18:12:11,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-14 18:12:11,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=4619, Unknown=0, NotChecked=0, Total=5402 [2018-10-14 18:12:11,197 INFO L87 Difference]: Start difference. First operand 388 states and 388 transitions. Second operand 74 states. [2018-10-14 18:12:14,002 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2018-10-14 18:12:14,546 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-14 18:12:14,705 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2018-10-14 18:12:15,228 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-14 18:12:15,406 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:15,925 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:16,095 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:16,582 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:16,759 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:17,258 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:17,441 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:17,947 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:18,149 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:18,682 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:18,880 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:19,265 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-14 18:12:19,498 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:19,708 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:20,270 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:20,488 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:21,044 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:21,269 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:21,854 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:22,085 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:22,670 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:22,912 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:23,510 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:23,754 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:24,395 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:24,689 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:24,900 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-14 18:12:25,315 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:25,570 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:26,217 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:26,478 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:27,135 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:27,398 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:28,059 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:28,331 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:28,983 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:29,267 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:29,530 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-14 18:12:30,027 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:30,315 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:31,028 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:31,318 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-14 18:12:32,016 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-14 18:12:32,297 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-14 18:12:32,812 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-14 18:12:33,095 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-14 18:12:35,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:12:35,143 INFO L93 Difference]: Finished difference Result 410 states and 410 transitions. [2018-10-14 18:12:35,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-14 18:12:35,143 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 387 [2018-10-14 18:12:35,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:12:35,145 INFO L225 Difference]: With dead ends: 410 [2018-10-14 18:12:35,145 INFO L226 Difference]: Without dead ends: 410 [2018-10-14 18:12:35,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9425 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=8673, Invalid=30729, Unknown=0, NotChecked=0, Total=39402 [2018-10-14 18:12:35,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2018-10-14 18:12:35,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 400. [2018-10-14 18:12:35,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2018-10-14 18:12:35,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 400 transitions. [2018-10-14 18:12:35,152 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 400 transitions. Word has length 387 [2018-10-14 18:12:35,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:12:35,152 INFO L481 AbstractCegarLoop]: Abstraction has 400 states and 400 transitions. [2018-10-14 18:12:35,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-14 18:12:35,152 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 400 transitions. [2018-10-14 18:12:35,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-10-14 18:12:35,154 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:12:35,155 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:12:35,155 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:12:35,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:12:35,155 INFO L82 PathProgramCache]: Analyzing trace with hash 780837855, now seen corresponding path program 29 times [2018-10-14 18:12:35,156 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:12:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:12:38,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 5017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:12:38,178 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:12:38,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-10-14 18:12:38,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-14 18:12:38,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-14 18:12:38,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1003, Invalid=4697, Unknown=0, NotChecked=0, Total=5700 [2018-10-14 18:12:38,180 INFO L87 Difference]: Start difference. First operand 400 states and 400 transitions. Second operand 76 states. [2018-10-14 18:12:41,474 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-14 18:12:45,080 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:12:45,901 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:12:46,394 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:12:47,054 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:12:49,879 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:12:50,120 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:12:55,033 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-14 18:12:55,291 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-14 18:13:00,166 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:13:02,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:13:02,619 INFO L93 Difference]: Finished difference Result 422 states and 422 transitions. [2018-10-14 18:13:02,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-10-14 18:13:02,619 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 399 [2018-10-14 18:13:02,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:13:02,621 INFO L225 Difference]: With dead ends: 422 [2018-10-14 18:13:02,621 INFO L226 Difference]: Without dead ends: 422 [2018-10-14 18:13:02,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10724 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=10400, Invalid=33072, Unknown=0, NotChecked=0, Total=43472 [2018-10-14 18:13:02,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2018-10-14 18:13:02,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 412. [2018-10-14 18:13:02,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-10-14 18:13:02,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 412 transitions. [2018-10-14 18:13:02,627 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 412 transitions. Word has length 399 [2018-10-14 18:13:02,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:13:02,628 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 412 transitions. [2018-10-14 18:13:02,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-14 18:13:02,628 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 412 transitions. [2018-10-14 18:13:02,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-10-14 18:13:02,630 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:13:02,631 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:13:02,631 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:13:02,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:13:02,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1225934393, now seen corresponding path program 30 times [2018-10-14 18:13:02,632 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:13:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:13:06,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:13:06,015 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:13:06,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-10-14 18:13:06,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-14 18:13:06,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-14 18:13:06,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1007, Invalid=4999, Unknown=0, NotChecked=0, Total=6006 [2018-10-14 18:13:06,017 INFO L87 Difference]: Start difference. First operand 412 states and 412 transitions. Second operand 78 states. [2018-10-14 18:13:08,954 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:09,415 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:09,558 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:09,997 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:10,148 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:10,647 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:11,266 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:11,427 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:11,901 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:12,547 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:12,720 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:13,205 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:13,384 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:13,883 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:14,068 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:14,579 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:15,289 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:15,513 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:16,130 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:16,341 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:16,900 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:17,113 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:17,691 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:17,919 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:18,518 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:18,749 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:19,356 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:19,591 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:20,210 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:20,457 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:21,176 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:21,417 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:22,030 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:22,277 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:22,920 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:23,172 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:23,802 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:24,064 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:24,986 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:26,018 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:26,295 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:26,988 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:27,279 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:27,979 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:28,264 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:28,978 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:29,283 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-14 18:13:30,003 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-14 18:13:30,811 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2018-10-14 18:13:31,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:13:31,745 INFO L93 Difference]: Finished difference Result 434 states and 434 transitions. [2018-10-14 18:13:31,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-10-14 18:13:31,745 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 411 [2018-10-14 18:13:31,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:13:31,746 INFO L225 Difference]: With dead ends: 434 [2018-10-14 18:13:31,747 INFO L226 Difference]: Without dead ends: 434 [2018-10-14 18:13:31,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11090 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=10556, Invalid=34600, Unknown=0, NotChecked=0, Total=45156 [2018-10-14 18:13:31,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-10-14 18:13:31,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 424. [2018-10-14 18:13:31,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-10-14 18:13:31,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 424 transitions. [2018-10-14 18:13:31,753 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 424 transitions. Word has length 411 [2018-10-14 18:13:31,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:13:31,753 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 424 transitions. [2018-10-14 18:13:31,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-14 18:13:31,753 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 424 transitions. [2018-10-14 18:13:31,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-10-14 18:13:31,756 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:13:31,756 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:13:31,756 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:13:31,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:13:31,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1458097233, now seen corresponding path program 31 times [2018-10-14 18:13:31,757 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:13:31,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:13:35,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:13:35,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:13:35,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-14 18:13:35,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-14 18:13:35,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-14 18:13:35,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1131, Invalid=5189, Unknown=0, NotChecked=0, Total=6320 [2018-10-14 18:13:35,205 INFO L87 Difference]: Start difference. First operand 424 states and 424 transitions. Second operand 80 states. [2018-10-14 18:13:38,639 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-14 18:13:39,824 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:13:40,991 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:13:41,169 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:13:42,302 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:13:42,943 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:13:46,290 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:13:46,540 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:13:47,270 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:14:01,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:14:01,812 INFO L93 Difference]: Finished difference Result 446 states and 446 transitions. [2018-10-14 18:14:01,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-10-14 18:14:01,813 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 423 [2018-10-14 18:14:01,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:14:01,814 INFO L225 Difference]: With dead ends: 446 [2018-10-14 18:14:01,814 INFO L226 Difference]: Without dead ends: 446 [2018-10-14 18:14:01,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12103 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=11625, Invalid=36995, Unknown=0, NotChecked=0, Total=48620 [2018-10-14 18:14:01,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2018-10-14 18:14:01,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 436. [2018-10-14 18:14:01,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2018-10-14 18:14:01,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 436 transitions. [2018-10-14 18:14:01,822 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 436 transitions. Word has length 423 [2018-10-14 18:14:01,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:14:01,822 INFO L481 AbstractCegarLoop]: Abstraction has 436 states and 436 transitions. [2018-10-14 18:14:01,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-14 18:14:01,822 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 436 transitions. [2018-10-14 18:14:01,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-10-14 18:14:01,825 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:14:01,825 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:14:01,826 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:14:01,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:14:01,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1164897897, now seen corresponding path program 32 times [2018-10-14 18:14:01,827 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:14:01,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:14:06,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 0 proven. 6112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:14:06,713 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:14:06,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-14 18:14:06,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-14 18:14:06,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-14 18:14:06,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=6090, Unknown=0, NotChecked=0, Total=6320 [2018-10-14 18:14:06,715 INFO L87 Difference]: Start difference. First operand 436 states and 436 transitions. Second operand 80 states.