java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplTransformed.xml -s ../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf -i ../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_false-valid-deref.i_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-093a8c0 [2018-10-14 18:05:50,336 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-14 18:05:50,338 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-14 18:05:50,351 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-14 18:05:50,351 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-14 18:05:50,352 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-14 18:05:50,354 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-14 18:05:50,356 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-14 18:05:50,357 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-14 18:05:50,358 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-14 18:05:50,359 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-14 18:05:50,359 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-14 18:05:50,360 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-14 18:05:50,361 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-14 18:05:50,362 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-14 18:05:50,363 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-14 18:05:50,364 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-14 18:05:50,366 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-14 18:05:50,368 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-14 18:05:50,369 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-14 18:05:50,370 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-14 18:05:50,372 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-14 18:05:50,374 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-14 18:05:50,388 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 18:05:50,407 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-14 18:05:50,407 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-14 18:05:50,408 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-14 18:05:50,408 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-14 18:05:50,408 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-14 18:05:50,409 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-14 18:05:50,409 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-14 18:05:50,410 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-14 18:05:50,410 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-14 18:05:50,410 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-14 18:05:50,410 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-14 18:05:50,410 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-14 18:05:50,411 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-14 18:05:50,411 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-14 18:05:50,412 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-14 18:05:50,454 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-14 18:05:50,478 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-14 18:05:50,487 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-14 18:05:50,488 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-14 18:05:50,489 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-14 18:05:50,490 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_false-valid-deref.i_5.bpl [2018-10-14 18:05:50,490 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_false-valid-deref.i_5.bpl' [2018-10-14 18:05:50,576 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-14 18:05:50,578 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-14 18:05:50,579 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-14 18:05:50,579 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-14 18:05:50,579 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-14 18:05:50,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:05:50" (1/1) ... [2018-10-14 18:05:50,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:05:50" (1/1) ... [2018-10-14 18:05:50,625 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:05:50" (1/1) ... [2018-10-14 18:05:50,626 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:05:50" (1/1) ... [2018-10-14 18:05:50,634 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:05:50" (1/1) ... [2018-10-14 18:05:50,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:05:50" (1/1) ... [2018-10-14 18:05:50,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:05:50" (1/1) ... [2018-10-14 18:05:50,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-14 18:05:50,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-14 18:05:50,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-14 18:05:50,651 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-14 18:05:50,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:05:50" (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 18:05:50,724 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-14 18:05:50,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-14 18:05:50,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-14 18:05:51,291 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-14 18:05:51,292 INFO L202 PluginConnector]: Adding new model 960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:05:51 BoogieIcfgContainer [2018-10-14 18:05:51,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-14 18:05:51,293 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2018-10-14 18:05:51,293 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2018-10-14 18:05:51,294 INFO L276 PluginConnector]: IcfgTransformer initialized [2018-10-14 18:05:51,298 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:05:51" (1/1) ... [2018-10-14 18:05:51,305 INFO L137 apSepIcfgTransformer]: HeapSepIcfgTransformer: Starting heap partitioning [2018-10-14 18:05:51,306 INFO L138 apSepIcfgTransformer]: To be partitioned heap arrays found [#memory_int] [2018-10-14 18:05:51,341 INFO L191 apSepIcfgTransformer]: Heap separator: starting loc-array-style preprocessing [2018-10-14 18:05:51,390 INFO L219 apSepIcfgTransformer]: finished MemlocArrayUpdater [2018-10-14 18:05:51,406 INFO L282 apSepIcfgTransformer]: finished preprocessing for the equality analysis [2018-10-14 18:05:51,476 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=1) [2018-10-14 18:06:23,454 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 18:06:23,456 INFO L306 apSepIcfgTransformer]: finished equality analysis [2018-10-14 18:06:23,462 INFO L318 apSepIcfgTransformer]: Finished detection of select terms ("array reads") [2018-10-14 18:06:23,499 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 18:06:23,543 INFO L232 HeapPartitionManager]: partitioning result: [2018-10-14 18:06:23,543 INFO L237 HeapPartitionManager]: location blocks for array group [#memory_int, ULTIMATE.start_write~int_old_#memory_int] [2018-10-14 18:06:23,544 INFO L246 HeapPartitionManager]: at dimension 1 [2018-10-14 18:06:23,544 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 3 [2018-10-14 18:06:23,544 INFO L248 HeapPartitionManager]: # location blocks :2 [2018-10-14 18:06:23,544 INFO L246 HeapPartitionManager]: at dimension 2 [2018-10-14 18:06:23,544 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 0 [2018-10-14 18:06:23,544 INFO L248 HeapPartitionManager]: # location blocks :0 [2018-10-14 18:06:23,545 INFO L237 HeapPartitionManager]: location blocks for array group [#memory_int, ULTIMATE.start_write~int_old_#memory_int] [2018-10-14 18:06:23,545 INFO L246 HeapPartitionManager]: at dimension 1 [2018-10-14 18:06:23,545 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 3 [2018-10-14 18:06:23,545 INFO L248 HeapPartitionManager]: # location blocks :2 [2018-10-14 18:06:23,545 INFO L246 HeapPartitionManager]: at dimension 2 [2018-10-14 18:06:23,545 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 0 [2018-10-14 18:06:23,546 INFO L248 HeapPartitionManager]: # location blocks :0 [2018-10-14 18:06:23,547 INFO L145 ransitionTransformer]: executing heap partitioning transformation [2018-10-14 18:06:23,564 INFO L202 PluginConnector]: Adding new model 960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.10 06:06:23 BasicIcfg [2018-10-14 18:06:23,564 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2018-10-14 18:06:23,565 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-14 18:06:23,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-14 18:06:23,569 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-14 18:06:23,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:05:50" (1/3) ... [2018-10-14 18:06:23,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43b1028 and model type 960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:06:23, skipping insertion in model container [2018-10-14 18:06:23,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:05:51" (2/3) ... [2018-10-14 18:06:23,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43b1028 and model type 960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 06:06:23, skipping insertion in model container [2018-10-14 18:06:23,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.10 06:06:23" (3/3) ... [2018-10-14 18:06:23,573 INFO L112 eAbstractionObserver]: Analyzing ICFG memPartitionedIcfg [2018-10-14 18:06:23,583 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-10-14 18:06:23,593 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-14 18:06:23,612 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-14 18:06:23,639 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-14 18:06:23,640 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-14 18:06:23,640 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-14 18:06:23,640 INFO L384 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-10-14 18:06:23,640 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-14 18:06:23,642 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-14 18:06:23,642 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-14 18:06:23,642 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-14 18:06:23,643 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-14 18:06:23,658 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2018-10-14 18:06:23,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-14 18:06:23,670 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:06:23,676 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 18:06:23,677 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:06:23,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:06:23,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1565987991, now seen corresponding path program 1 times [2018-10-14 18:06:23,735 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:06:23,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:06:25,077 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 18:06:25,080 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-14 18:06:25,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2018-10-14 18:06:25,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-14 18:06:25,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-14 18:06:25,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-10-14 18:06:25,100 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 14 states. [2018-10-14 18:06:25,759 WARN L179 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-10-14 18:06:26,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:06:26,623 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-14 18:06:26,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-14 18:06:26,625 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2018-10-14 18:06:26,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:06:26,636 INFO L225 Difference]: With dead ends: 74 [2018-10-14 18:06:26,637 INFO L226 Difference]: Without dead ends: 74 [2018-10-14 18:06:26,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2018-10-14 18:06:26,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-14 18:06:26,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2018-10-14 18:06:26,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-14 18:06:26,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-14 18:06:26,677 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 51 [2018-10-14 18:06:26,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:06:26,678 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-14 18:06:26,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-14 18:06:26,678 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-14 18:06:26,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-14 18:06:26,680 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:06:26,681 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 18:06:26,681 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:06:26,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:06:26,682 INFO L82 PathProgramCache]: Analyzing trace with hash -725690753, now seen corresponding path program 1 times [2018-10-14 18:06:26,683 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:06:26,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:06:27,255 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 18:06:27,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:06:27,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-14 18:06:27,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-14 18:06:27,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-14 18:06:27,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2018-10-14 18:06:27,259 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 17 states. [2018-10-14 18:06:28,658 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-14 18:06:28,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:06:28,840 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-14 18:06:28,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-14 18:06:28,851 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2018-10-14 18:06:28,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:06:28,853 INFO L225 Difference]: With dead ends: 86 [2018-10-14 18:06:28,853 INFO L226 Difference]: Without dead ends: 86 [2018-10-14 18:06:28,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=388, Invalid=1094, Unknown=0, NotChecked=0, Total=1482 [2018-10-14 18:06:28,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-14 18:06:28,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2018-10-14 18:06:28,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-14 18:06:28,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-14 18:06:28,874 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 63 [2018-10-14 18:06:28,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:06:28,876 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-14 18:06:28,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-14 18:06:28,876 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-14 18:06:28,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-14 18:06:28,879 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:06:28,881 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 18:06:28,882 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:06:28,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:06:28,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1481309287, now seen corresponding path program 2 times [2018-10-14 18:06:28,883 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:06:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:06:29,454 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 18:06:29,454 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:06:29,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-14 18:06:29,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-14 18:06:29,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-14 18:06:29,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2018-10-14 18:06:29,456 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 20 states. [2018-10-14 18:06:30,232 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2018-10-14 18:06:30,746 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-14 18:06:31,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:06:31,413 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-14 18:06:31,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-14 18:06:31,414 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2018-10-14 18:06:31,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:06:31,417 INFO L225 Difference]: With dead ends: 98 [2018-10-14 18:06:31,418 INFO L226 Difference]: Without dead ends: 98 [2018-10-14 18:06:31,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=471, Invalid=1509, Unknown=0, NotChecked=0, Total=1980 [2018-10-14 18:06:31,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-14 18:06:31,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2018-10-14 18:06:31,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-14 18:06:31,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-14 18:06:31,426 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 75 [2018-10-14 18:06:31,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:06:31,427 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-14 18:06:31,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-14 18:06:31,427 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-14 18:06:31,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-14 18:06:31,429 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:06:31,429 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 18:06:31,430 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:06:31,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:06:31,430 INFO L82 PathProgramCache]: Analyzing trace with hash 8750671, now seen corresponding path program 3 times [2018-10-14 18:06:31,431 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:06:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:06:31,928 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 18:06:31,928 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:06:31,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-14 18:06:31,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-14 18:06:31,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-14 18:06:31,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2018-10-14 18:06:31,930 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 22 states. [2018-10-14 18:06:33,783 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-14 18:06:34,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:06:34,654 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-14 18:06:34,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-14 18:06:34,659 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 87 [2018-10-14 18:06:34,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:06:34,661 INFO L225 Difference]: With dead ends: 110 [2018-10-14 18:06:34,661 INFO L226 Difference]: Without dead ends: 110 [2018-10-14 18:06:34,662 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=547, Invalid=1903, Unknown=0, NotChecked=0, Total=2450 [2018-10-14 18:06:34,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-14 18:06:34,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2018-10-14 18:06:34,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-14 18:06:34,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-14 18:06:34,670 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 87 [2018-10-14 18:06:34,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:06:34,670 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-14 18:06:34,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-14 18:06:34,671 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-14 18:06:34,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-14 18:06:34,672 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:06:34,672 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 18:06:34,673 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:06:34,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:06:34,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1727558711, now seen corresponding path program 4 times [2018-10-14 18:06:34,674 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:06:34,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:06:35,185 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 18:06:35,185 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:06:35,186 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-14 18:06:35,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-14 18:06:35,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-14 18:06:35,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2018-10-14 18:06:35,187 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 24 states. [2018-10-14 18:06:38,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:06:38,129 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-10-14 18:06:38,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-14 18:06:38,129 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 99 [2018-10-14 18:06:38,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:06:38,131 INFO L225 Difference]: With dead ends: 122 [2018-10-14 18:06:38,131 INFO L226 Difference]: Without dead ends: 122 [2018-10-14 18:06:38,132 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 18:06:38,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-14 18:06:38,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 112. [2018-10-14 18:06:38,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-14 18:06:38,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-14 18:06:38,141 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 99 [2018-10-14 18:06:38,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:06:38,141 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-14 18:06:38,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-14 18:06:38,142 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-14 18:06:38,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-14 18:06:38,143 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:06:38,143 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 18:06:38,144 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:06:38,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:06:38,144 INFO L82 PathProgramCache]: Analyzing trace with hash 640534047, now seen corresponding path program 5 times [2018-10-14 18:06:38,145 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:06:38,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:06:38,957 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 18:06:38,958 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:06:38,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-14 18:06:38,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-14 18:06:38,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-14 18:06:38,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2018-10-14 18:06:38,959 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 28 states. [2018-10-14 18:06:40,557 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-14 18:06:40,704 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:06:41,125 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:06:41,309 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:06:41,468 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-14 18:06:42,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:06:42,595 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-10-14 18:06:42,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-14 18:06:42,596 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 111 [2018-10-14 18:06:42,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:06:42,598 INFO L225 Difference]: With dead ends: 134 [2018-10-14 18:06:42,599 INFO L226 Difference]: Without dead ends: 134 [2018-10-14 18:06:42,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1004, Invalid=3156, Unknown=0, NotChecked=0, Total=4160 [2018-10-14 18:06:42,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-14 18:06:42,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 124. [2018-10-14 18:06:42,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-14 18:06:42,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-10-14 18:06:42,607 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 111 [2018-10-14 18:06:42,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:06:42,608 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-10-14 18:06:42,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-14 18:06:42,608 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-10-14 18:06:42,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-14 18:06:42,610 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:06:42,610 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 18:06:42,610 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:06:42,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:06:42,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1504672775, now seen corresponding path program 6 times [2018-10-14 18:06:42,611 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:06:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:06:43,271 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 18:06:43,271 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:06:43,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-10-14 18:06:43,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-14 18:06:43,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-14 18:06:43,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2018-10-14 18:06:43,273 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 30 states. [2018-10-14 18:06:44,999 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2018-10-14 18:06:45,569 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-14 18:06:45,969 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:06:46,485 WARN L179 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:06:46,677 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-14 18:06:46,977 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2018-10-14 18:06:47,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:06:47,941 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-10-14 18:06:47,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-14 18:06:47,943 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 123 [2018-10-14 18:06:47,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:06:47,944 INFO L225 Difference]: With dead ends: 146 [2018-10-14 18:06:47,944 INFO L226 Difference]: Without dead ends: 146 [2018-10-14 18:06:47,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1064, Invalid=3628, Unknown=0, NotChecked=0, Total=4692 [2018-10-14 18:06:47,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-14 18:06:47,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 136. [2018-10-14 18:06:47,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-14 18:06:47,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-10-14 18:06:47,952 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 123 [2018-10-14 18:06:47,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:06:47,953 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-10-14 18:06:47,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-14 18:06:47,953 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-10-14 18:06:47,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-14 18:06:47,955 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:06:47,955 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 18:06:47,955 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:06:47,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:06:47,956 INFO L82 PathProgramCache]: Analyzing trace with hash 503813615, now seen corresponding path program 7 times [2018-10-14 18:06:47,956 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:06:47,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:06:49,322 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 18:06:49,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:06:49,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-14 18:06:49,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-14 18:06:49,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-14 18:06:49,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2018-10-14 18:06:49,324 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 32 states. [2018-10-14 18:06:50,043 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-14 18:06:51,447 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:06:54,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:06:54,863 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-10-14 18:06:54,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-14 18:06:54,863 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 135 [2018-10-14 18:06:54,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:06:54,865 INFO L225 Difference]: With dead ends: 158 [2018-10-14 18:06:54,865 INFO L226 Difference]: Without dead ends: 158 [2018-10-14 18:06:54,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1413, Invalid=4439, Unknown=0, NotChecked=0, Total=5852 [2018-10-14 18:06:54,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-14 18:06:54,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2018-10-14 18:06:54,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-14 18:06:54,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-14 18:06:54,872 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 135 [2018-10-14 18:06:54,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:06:54,872 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-14 18:06:54,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-14 18:06:54,873 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-14 18:06:54,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-14 18:06:54,875 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:06:54,875 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 18:06:54,875 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:06:54,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:06:54,876 INFO L82 PathProgramCache]: Analyzing trace with hash 281023447, now seen corresponding path program 8 times [2018-10-14 18:06:54,876 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:06:54,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:06:56,413 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 18:06:56,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:06:56,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-14 18:06:56,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-14 18:06:56,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-14 18:06:56,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2018-10-14 18:06:56,415 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 32 states. [2018-10-14 18:07:01,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:07:01,903 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2018-10-14 18:07:01,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-14 18:07:01,904 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 147 [2018-10-14 18:07:01,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:07:01,905 INFO L225 Difference]: With dead ends: 170 [2018-10-14 18:07:01,905 INFO L226 Difference]: Without dead ends: 170 [2018-10-14 18:07:01,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=927, Invalid=4623, Unknown=0, NotChecked=0, Total=5550 [2018-10-14 18:07:01,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-14 18:07:01,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2018-10-14 18:07:01,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-14 18:07:01,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-10-14 18:07:01,912 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 147 [2018-10-14 18:07:01,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:07:01,912 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-10-14 18:07:01,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-14 18:07:01,913 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-10-14 18:07:01,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-14 18:07:01,915 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:07:01,915 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 18:07:01,915 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:07:01,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:07:01,916 INFO L82 PathProgramCache]: Analyzing trace with hash -798820929, now seen corresponding path program 9 times [2018-10-14 18:07:01,916 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:07:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:07:03,576 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 18:07:03,576 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:07:03,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-10-14 18:07:03,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-14 18:07:03,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-14 18:07:03,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2018-10-14 18:07:03,578 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 36 states. [2018-10-14 18:07:05,456 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-14 18:07:06,502 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:07:06,922 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-14 18:07:07,116 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:07:07,296 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:07:08,224 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:07:09,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:07:09,777 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2018-10-14 18:07:09,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-14 18:07:09,778 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 159 [2018-10-14 18:07:09,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:07:09,780 INFO L225 Difference]: With dead ends: 182 [2018-10-14 18:07:09,780 INFO L226 Difference]: Without dead ends: 182 [2018-10-14 18:07:09,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1890, Invalid=5942, Unknown=0, NotChecked=0, Total=7832 [2018-10-14 18:07:09,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-14 18:07:09,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 172. [2018-10-14 18:07:09,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-10-14 18:07:09,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2018-10-14 18:07:09,786 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 159 [2018-10-14 18:07:09,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:07:09,786 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2018-10-14 18:07:09,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-14 18:07:09,787 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2018-10-14 18:07:09,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-14 18:07:09,788 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:07:09,789 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 18:07:09,789 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:07:09,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:07:09,789 INFO L82 PathProgramCache]: Analyzing trace with hash 2088385447, now seen corresponding path program 10 times [2018-10-14 18:07:09,790 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:07:09,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:07:10,830 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 18:07:10,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:07:10,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-14 18:07:10,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-14 18:07:10,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-14 18:07:10,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2018-10-14 18:07:10,833 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 38 states. [2018-10-14 18:07:13,330 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-14 18:07:13,482 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:13,930 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:14,469 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:14,624 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:15,185 WARN L179 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:15,349 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:15,798 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:15,961 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:16,399 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:16,565 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-14 18:07:17,007 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-14 18:07:17,214 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2018-10-14 18:07:18,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:07:18,042 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2018-10-14 18:07:18,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-14 18:07:18,047 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 171 [2018-10-14 18:07:18,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:07:18,049 INFO L225 Difference]: With dead ends: 194 [2018-10-14 18:07:18,049 INFO L226 Difference]: Without dead ends: 194 [2018-10-14 18:07:18,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1966, Invalid=6590, Unknown=0, NotChecked=0, Total=8556 [2018-10-14 18:07:18,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-14 18:07:18,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 184. [2018-10-14 18:07:18,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-14 18:07:18,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2018-10-14 18:07:18,057 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 171 [2018-10-14 18:07:18,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:07:18,058 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2018-10-14 18:07:18,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-14 18:07:18,058 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2018-10-14 18:07:18,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-14 18:07:18,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:07:18,060 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 18:07:18,060 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:07:18,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:07:18,061 INFO L82 PathProgramCache]: Analyzing trace with hash 898622863, now seen corresponding path program 11 times [2018-10-14 18:07:18,062 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:07:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:07:19,265 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 18:07:19,265 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:07:19,265 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-14 18:07:19,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-14 18:07:19,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-14 18:07:19,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1349, Unknown=0, NotChecked=0, Total=1560 [2018-10-14 18:07:19,267 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand 40 states. [2018-10-14 18:07:21,288 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-14 18:07:21,829 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:07:22,402 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:07:22,578 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:07:23,553 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:07:26,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:07:26,938 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2018-10-14 18:07:26,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-14 18:07:26,938 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 183 [2018-10-14 18:07:26,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:07:26,940 INFO L225 Difference]: With dead ends: 206 [2018-10-14 18:07:26,940 INFO L226 Difference]: Without dead ends: 206 [2018-10-14 18:07:26,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=2435, Invalid=7665, Unknown=0, NotChecked=0, Total=10100 [2018-10-14 18:07:26,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-10-14 18:07:26,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 196. [2018-10-14 18:07:26,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-14 18:07:26,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2018-10-14 18:07:26,945 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 183 [2018-10-14 18:07:26,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:07:26,946 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2018-10-14 18:07:26,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-14 18:07:26,946 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2018-10-14 18:07:26,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-10-14 18:07:26,947 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:07:26,947 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 18:07:26,947 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:07:26,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:07:26,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1657932937, now seen corresponding path program 12 times [2018-10-14 18:07:26,949 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:07:26,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:07:27,523 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-14 18:07:28,415 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-14 18:07:29,412 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 18:07:29,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:07:29,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-10-14 18:07:29,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-14 18:07:29,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-14 18:07:29,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2018-10-14 18:07:29,414 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 42 states. [2018-10-14 18:07:32,742 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-14 18:07:32,907 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2018-10-14 18:07:33,438 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-14 18:07:33,618 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:07:34,137 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:07:34,317 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:07:34,797 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:07:34,984 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:07:35,466 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:07:35,658 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-14 18:07:36,142 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-14 18:07:36,329 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-14 18:07:36,659 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-14 18:07:36,835 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-14 18:07:37,675 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2018-10-14 18:07:38,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:07:38,197 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2018-10-14 18:07:38,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-14 18:07:38,198 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 195 [2018-10-14 18:07:38,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:07:38,199 INFO L225 Difference]: With dead ends: 218 [2018-10-14 18:07:38,199 INFO L226 Difference]: Without dead ends: 218 [2018-10-14 18:07:38,201 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2105 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=2185, Invalid=8321, Unknown=0, NotChecked=0, Total=10506 [2018-10-14 18:07:38,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-10-14 18:07:38,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 208. [2018-10-14 18:07:38,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-14 18:07:38,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2018-10-14 18:07:38,205 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 195 [2018-10-14 18:07:38,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:07:38,205 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2018-10-14 18:07:38,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-14 18:07:38,205 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2018-10-14 18:07:38,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-14 18:07:38,206 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:07:38,207 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 18:07:38,207 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:07:38,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:07:38,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1440638303, now seen corresponding path program 13 times [2018-10-14 18:07:38,208 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:07:38,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:07:39,371 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 18:07:39,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:07:39,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-14 18:07:39,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-14 18:07:39,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-14 18:07:39,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1625, Unknown=0, NotChecked=0, Total=1892 [2018-10-14 18:07:39,373 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 44 states. [2018-10-14 18:07:41,517 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-14 18:07:42,716 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:07:45,642 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:07:46,702 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:07:48,041 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2018-10-14 18:07:48,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:07:48,560 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2018-10-14 18:07:48,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-14 18:07:48,560 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 207 [2018-10-14 18:07:48,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:07:48,562 INFO L225 Difference]: With dead ends: 230 [2018-10-14 18:07:48,562 INFO L226 Difference]: Without dead ends: 230 [2018-10-14 18:07:48,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2716 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=3048, Invalid=9608, Unknown=0, NotChecked=0, Total=12656 [2018-10-14 18:07:48,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-10-14 18:07:48,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 220. [2018-10-14 18:07:48,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-14 18:07:48,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 220 transitions. [2018-10-14 18:07:48,568 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 220 transitions. Word has length 207 [2018-10-14 18:07:48,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:07:48,569 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 220 transitions. [2018-10-14 18:07:48,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-14 18:07:48,569 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 220 transitions. [2018-10-14 18:07:48,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-14 18:07:48,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:07:48,571 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 18:07:48,571 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:07:48,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:07:48,571 INFO L82 PathProgramCache]: Analyzing trace with hash -2094318777, now seen corresponding path program 14 times [2018-10-14 18:07:48,572 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:07:48,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:07:49,867 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 18:07:49,867 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:07:49,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-14 18:07:49,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-14 18:07:49,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-14 18:07:49,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1799, Unknown=0, NotChecked=0, Total=2070 [2018-10-14 18:07:49,869 INFO L87 Difference]: Start difference. First operand 220 states and 220 transitions. Second operand 46 states. [2018-10-14 18:07:52,573 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-14 18:07:52,719 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:53,066 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-14 18:07:53,250 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:53,407 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:53,818 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:53,967 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:54,410 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:54,575 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:55,028 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:55,192 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:55,638 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:55,802 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:56,272 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:56,448 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:56,923 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:57,104 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:57,593 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:57,783 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:58,164 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-14 18:07:58,413 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:58,625 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-14 18:07:59,117 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-14 18:08:00,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:08:00,147 INFO L93 Difference]: Finished difference Result 242 states and 242 transitions. [2018-10-14 18:08:00,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-14 18:08:00,148 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 219 [2018-10-14 18:08:00,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:08:00,150 INFO L225 Difference]: With dead ends: 242 [2018-10-14 18:08:00,150 INFO L226 Difference]: Without dead ends: 242 [2018-10-14 18:08:00,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2906 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=3140, Invalid=10432, Unknown=0, NotChecked=0, Total=13572 [2018-10-14 18:08:00,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-10-14 18:08:00,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 232. [2018-10-14 18:08:00,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-10-14 18:08:00,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2018-10-14 18:08:00,157 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 219 [2018-10-14 18:08:00,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:08:00,157 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2018-10-14 18:08:00,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-14 18:08:00,157 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2018-10-14 18:08:00,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-10-14 18:08:00,158 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:08:00,159 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 18:08:00,159 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:08:00,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:08:00,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1235121455, now seen corresponding path program 15 times [2018-10-14 18:08:00,160 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:08:00,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:08:01,873 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 18:08:01,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:08:01,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-14 18:08:01,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-14 18:08:01,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-14 18:08:01,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1925, Unknown=0, NotChecked=0, Total=2256 [2018-10-14 18:08:01,875 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand 48 states. [2018-10-14 18:08:03,857 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-14 18:08:04,906 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:08:05,439 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:08:06,561 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:08:07,172 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:08:08,421 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:08:08,634 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:08:09,093 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:08:09,759 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:08:10,436 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:08:11,134 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:08:12,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:08:12,322 INFO L93 Difference]: Finished difference Result 254 states and 254 transitions. [2018-10-14 18:08:12,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-14 18:08:12,323 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 231 [2018-10-14 18:08:12,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:08:12,325 INFO L225 Difference]: With dead ends: 254 [2018-10-14 18:08:12,325 INFO L226 Difference]: Without dead ends: 254 [2018-10-14 18:08:12,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3423 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=3729, Invalid=11771, Unknown=0, NotChecked=0, Total=15500 [2018-10-14 18:08:12,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-10-14 18:08:12,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 244. [2018-10-14 18:08:12,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-10-14 18:08:12,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 244 transitions. [2018-10-14 18:08:12,330 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 244 transitions. Word has length 231 [2018-10-14 18:08:12,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:08:12,331 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 244 transitions. [2018-10-14 18:08:12,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-14 18:08:12,331 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 244 transitions. [2018-10-14 18:08:12,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-14 18:08:12,333 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:08:12,333 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 18:08:12,333 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:08:12,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:08:12,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1321341719, now seen corresponding path program 16 times [2018-10-14 18:08:12,334 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:08:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:08:14,477 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 18:08:14,478 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:08:14,478 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-14 18:08:14,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-14 18:08:14,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-14 18:08:14,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2122, Unknown=0, NotChecked=0, Total=2256 [2018-10-14 18:08:14,479 INFO L87 Difference]: Start difference. First operand 244 states and 244 transitions. Second operand 48 states. [2018-10-14 18:08:25,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:08:25,876 INFO L93 Difference]: Finished difference Result 266 states and 266 transitions. [2018-10-14 18:08:25,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-14 18:08:25,877 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 243 [2018-10-14 18:08:25,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:08:25,878 INFO L225 Difference]: With dead ends: 266 [2018-10-14 18:08:25,878 INFO L226 Difference]: Without dead ends: 266 [2018-10-14 18:08:25,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2323 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1535, Invalid=11575, Unknown=0, NotChecked=0, Total=13110 [2018-10-14 18:08:25,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-10-14 18:08:25,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 256. [2018-10-14 18:08:25,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-10-14 18:08:25,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 256 transitions. [2018-10-14 18:08:25,884 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 256 transitions. Word has length 243 [2018-10-14 18:08:25,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:08:25,885 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 256 transitions. [2018-10-14 18:08:25,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-14 18:08:25,885 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 256 transitions. [2018-10-14 18:08:25,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-10-14 18:08:25,886 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:08:25,886 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 18:08:25,887 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:08:25,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:08:25,887 INFO L82 PathProgramCache]: Analyzing trace with hash 958403839, now seen corresponding path program 17 times [2018-10-14 18:08:25,888 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:08:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:08:27,422 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 18:08:27,422 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:08:27,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-10-14 18:08:27,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-14 18:08:27,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-14 18:08:27,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=2249, Unknown=0, NotChecked=0, Total=2652 [2018-10-14 18:08:27,424 INFO L87 Difference]: Start difference. First operand 256 states and 256 transitions. Second operand 52 states. [2018-10-14 18:08:31,087 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-14 18:08:33,296 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:08:33,880 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:08:34,064 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:08:36,438 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:08:38,474 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:08:39,234 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:08:41,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:08:41,295 INFO L93 Difference]: Finished difference Result 278 states and 278 transitions. [2018-10-14 18:08:41,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-14 18:08:41,296 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 255 [2018-10-14 18:08:41,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:08:41,298 INFO L225 Difference]: With dead ends: 278 [2018-10-14 18:08:41,298 INFO L226 Difference]: Without dead ends: 278 [2018-10-14 18:08:41,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4214 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=4478, Invalid=14154, Unknown=0, NotChecked=0, Total=18632 [2018-10-14 18:08:41,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-10-14 18:08:41,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 268. [2018-10-14 18:08:41,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-10-14 18:08:41,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 268 transitions. [2018-10-14 18:08:41,305 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 268 transitions. Word has length 255 [2018-10-14 18:08:41,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:08:41,305 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 268 transitions. [2018-10-14 18:08:41,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-14 18:08:41,305 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 268 transitions. [2018-10-14 18:08:41,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-10-14 18:08:41,307 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:08:41,307 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 18:08:41,307 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:08:41,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:08:41,308 INFO L82 PathProgramCache]: Analyzing trace with hash 809663207, now seen corresponding path program 18 times [2018-10-14 18:08:41,309 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:08:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:08:43,131 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 18:08:43,131 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:08:43,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-10-14 18:08:43,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-14 18:08:43,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-14 18:08:43,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2455, Unknown=0, NotChecked=0, Total=2862 [2018-10-14 18:08:43,133 INFO L87 Difference]: Start difference. First operand 268 states and 268 transitions. Second operand 54 states. [2018-10-14 18:08:46,329 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-14 18:08:46,480 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:46,948 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:47,102 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:47,508 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:48,105 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:48,265 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:48,708 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:48,867 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:49,345 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:49,567 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:50,046 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:50,231 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:50,716 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:50,909 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:51,402 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:51,594 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:52,111 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:52,313 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:52,839 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:53,041 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:53,577 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:53,785 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:54,331 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:54,586 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:55,168 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:55,394 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-14 18:08:55,949 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-14 18:08:57,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:08:57,113 INFO L93 Difference]: Finished difference Result 290 states and 290 transitions. [2018-10-14 18:08:57,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-14 18:08:57,113 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 267 [2018-10-14 18:08:57,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:08:57,115 INFO L225 Difference]: With dead ends: 290 [2018-10-14 18:08:57,115 INFO L226 Difference]: Without dead ends: 290 [2018-10-14 18:08:57,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4448 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=4586, Invalid=15154, Unknown=0, NotChecked=0, Total=19740 [2018-10-14 18:08:57,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-10-14 18:08:57,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 280. [2018-10-14 18:08:57,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-10-14 18:08:57,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 280 transitions. [2018-10-14 18:08:57,122 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 280 transitions. Word has length 267 [2018-10-14 18:08:57,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:08:57,123 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 280 transitions. [2018-10-14 18:08:57,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-14 18:08:57,123 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 280 transitions. [2018-10-14 18:08:57,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-10-14 18:08:57,124 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:08:57,125 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 18:08:57,125 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:08:57,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:08:57,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1555252431, now seen corresponding path program 19 times [2018-10-14 18:08:57,126 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:08:57,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:08:58,907 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 18:08:58,908 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:08:58,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-10-14 18:08:58,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-14 18:08:58,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-14 18:08:58,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=2597, Unknown=0, NotChecked=0, Total=3080 [2018-10-14 18:08:58,909 INFO L87 Difference]: Start difference. First operand 280 states and 280 transitions. Second operand 56 states. [2018-10-14 18:09:02,642 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:09:03,717 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:09:05,484 WARN L179 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-14 18:09:06,233 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:09:06,854 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:09:07,500 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:09:07,686 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:09:08,174 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:09:09,571 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:09:09,782 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:09:11,137 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:09:11,877 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:09:13,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:09:14,000 INFO L93 Difference]: Finished difference Result 302 states and 302 transitions. [2018-10-14 18:09:14,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-14 18:09:14,000 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 279 [2018-10-14 18:09:14,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:09:14,002 INFO L225 Difference]: With dead ends: 302 [2018-10-14 18:09:14,002 INFO L226 Difference]: Without dead ends: 302 [2018-10-14 18:09:14,004 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 18:09:14,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2018-10-14 18:09:14,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 292. [2018-10-14 18:09:14,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-10-14 18:09:14,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 292 transitions. [2018-10-14 18:09:14,008 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 292 transitions. Word has length 279 [2018-10-14 18:09:14,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:09:14,009 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 292 transitions. [2018-10-14 18:09:14,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-14 18:09:14,009 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 292 transitions. [2018-10-14 18:09:14,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-10-14 18:09:14,011 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:09:14,011 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 18:09:14,011 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:09:14,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:09:14,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1744597687, now seen corresponding path program 20 times [2018-10-14 18:09:14,012 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:09:14,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:09:16,670 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 18:09:16,671 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:09:16,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-10-14 18:09:16,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-14 18:09:16,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-14 18:09:16,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=2891, Unknown=0, NotChecked=0, Total=3306 [2018-10-14 18:09:16,673 INFO L87 Difference]: Start difference. First operand 292 states and 292 transitions. Second operand 58 states. [2018-10-14 18:09:20,056 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2018-10-14 18:09:20,703 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-14 18:09:20,855 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2018-10-14 18:09:21,433 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-14 18:09:21,605 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:22,152 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:22,328 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:22,799 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:22,997 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:23,490 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:23,683 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:24,180 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:24,379 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:24,892 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:25,109 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:25,331 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-14 18:09:25,693 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:25,905 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:26,449 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:26,670 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:27,224 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:27,451 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:27,823 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-14 18:09:28,044 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:28,281 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:28,862 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:29,103 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:29,713 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:29,951 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-14 18:09:30,401 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2018-10-14 18:09:30,641 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-14 18:09:30,874 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-14 18:09:31,294 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-14 18:09:31,518 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-14 18:09:31,911 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2018-10-14 18:09:33,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:09:33,111 INFO L93 Difference]: Finished difference Result 314 states and 314 transitions. [2018-10-14 18:09:33,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-14 18:09:33,111 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 291 [2018-10-14 18:09:33,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:09:33,113 INFO L225 Difference]: With dead ends: 314 [2018-10-14 18:09:33,113 INFO L226 Difference]: Without dead ends: 314 [2018-10-14 18:09:33,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5093 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=4885, Invalid=17765, Unknown=0, NotChecked=0, Total=22650 [2018-10-14 18:09:33,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2018-10-14 18:09:33,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 304. [2018-10-14 18:09:33,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-10-14 18:09:33,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 304 transitions. [2018-10-14 18:09:33,119 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 304 transitions. Word has length 291 [2018-10-14 18:09:33,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:09:33,120 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 304 transitions. [2018-10-14 18:09:33,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-14 18:09:33,120 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 304 transitions. [2018-10-14 18:09:33,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-10-14 18:09:33,121 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:09:33,122 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 18:09:33,122 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:09:33,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:09:33,122 INFO L82 PathProgramCache]: Analyzing trace with hash -56097633, now seen corresponding path program 21 times [2018-10-14 18:09:33,123 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:09:33,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:09:35,198 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 18:09:35,198 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:09:35,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-10-14 18:09:35,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-14 18:09:35,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-14 18:09:35,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=2969, Unknown=0, NotChecked=0, Total=3540 [2018-10-14 18:09:35,199 INFO L87 Difference]: Start difference. First operand 304 states and 304 transitions. Second operand 60 states. [2018-10-14 18:09:39,658 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:09:40,585 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-14 18:09:45,756 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:09:50,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:09:50,687 INFO L93 Difference]: Finished difference Result 326 states and 326 transitions. [2018-10-14 18:09:50,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-14 18:09:50,689 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 303 [2018-10-14 18:09:50,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:09:50,690 INFO L225 Difference]: With dead ends: 326 [2018-10-14 18:09:50,690 INFO L226 Difference]: Without dead ends: 326 [2018-10-14 18:09:50,693 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 18:09:50,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2018-10-14 18:09:50,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 316. [2018-10-14 18:09:50,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-10-14 18:09:50,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 316 transitions. [2018-10-14 18:09:50,697 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 316 transitions. Word has length 303 [2018-10-14 18:09:50,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:09:50,698 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 316 transitions. [2018-10-14 18:09:50,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-14 18:09:50,698 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 316 transitions. [2018-10-14 18:09:50,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-10-14 18:09:50,699 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:09:50,700 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 18:09:50,700 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:09:50,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:09:50,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1178598023, now seen corresponding path program 22 times [2018-10-14 18:09:50,701 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:09:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:09:54,029 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 18:09:54,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:09:54,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-10-14 18:09:54,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-14 18:09:54,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-14 18:09:54,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=3207, Unknown=0, NotChecked=0, Total=3782 [2018-10-14 18:09:54,030 INFO L87 Difference]: Start difference. First operand 316 states and 316 transitions. Second operand 62 states. [2018-10-14 18:09:55,929 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2018-10-14 18:09:57,078 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:09:57,533 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:09:58,087 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:09:58,235 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:09:58,672 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:09:58,836 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:09:59,285 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:09:59,448 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:09:59,915 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:00,084 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:10:00,555 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:00,731 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:10:01,286 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:01,461 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:10:01,953 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:02,136 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:10:02,643 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:02,833 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:10:03,341 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:03,538 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:10:04,055 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:04,261 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:10:04,783 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:05,533 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:05,744 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:10:06,121 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-14 18:10:06,339 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:06,577 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:10:07,135 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:07,361 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:10:07,935 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:08,741 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:09,571 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-14 18:10:10,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:10:10,844 INFO L93 Difference]: Finished difference Result 338 states and 338 transitions. [2018-10-14 18:10:10,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-14 18:10:10,845 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 315 [2018-10-14 18:10:10,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:10:10,847 INFO L225 Difference]: With dead ends: 338 [2018-10-14 18:10:10,848 INFO L226 Difference]: Without dead ends: 338 [2018-10-14 18:10:10,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6326 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=6304, Invalid=20756, Unknown=0, NotChecked=0, Total=27060 [2018-10-14 18:10:10,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-10-14 18:10:10,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 328. [2018-10-14 18:10:10,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-10-14 18:10:10,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 328 transitions. [2018-10-14 18:10:10,854 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 328 transitions. Word has length 315 [2018-10-14 18:10:10,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:10:10,854 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 328 transitions. [2018-10-14 18:10:10,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-14 18:10:10,855 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 328 transitions. [2018-10-14 18:10:10,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-10-14 18:10:10,856 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:10:10,857 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 18:10:10,857 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:10:10,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:10:10,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1900958831, now seen corresponding path program 23 times [2018-10-14 18:10:10,858 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:10:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:10:13,204 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 18:10:13,205 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:10:13,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-10-14 18:10:13,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-14 18:10:13,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-14 18:10:13,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=667, Invalid=3365, Unknown=0, NotChecked=0, Total=4032 [2018-10-14 18:10:13,206 INFO L87 Difference]: Start difference. First operand 328 states and 328 transitions. Second operand 64 states. [2018-10-14 18:10:16,455 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-14 18:10:21,171 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:10:30,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:10:30,907 INFO L93 Difference]: Finished difference Result 350 states and 350 transitions. [2018-10-14 18:10:30,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-10-14 18:10:30,907 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 327 [2018-10-14 18:10:30,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:10:30,908 INFO L225 Difference]: With dead ends: 350 [2018-10-14 18:10:30,908 INFO L226 Difference]: Without dead ends: 350 [2018-10-14 18:10:30,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7091 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=7133, Invalid=22623, Unknown=0, NotChecked=0, Total=29756 [2018-10-14 18:10:30,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2018-10-14 18:10:30,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 340. [2018-10-14 18:10:30,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-10-14 18:10:30,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 340 transitions. [2018-10-14 18:10:30,917 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 340 transitions. Word has length 327 [2018-10-14 18:10:30,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:10:30,918 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 340 transitions. [2018-10-14 18:10:30,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-14 18:10:30,918 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 340 transitions. [2018-10-14 18:10:30,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-10-14 18:10:30,920 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:10:30,920 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 18:10:30,920 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:10:30,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:10:30,921 INFO L82 PathProgramCache]: Analyzing trace with hash 727519831, now seen corresponding path program 24 times [2018-10-14 18:10:30,921 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:10:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:10:33,656 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 18:10:33,657 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:10:33,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-10-14 18:10:33,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-14 18:10:33,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-14 18:10:33,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=3859, Unknown=0, NotChecked=0, Total=4290 [2018-10-14 18:10:33,658 INFO L87 Difference]: Start difference. First operand 340 states and 340 transitions. Second operand 66 states. [2018-10-14 18:10:35,982 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2018-10-14 18:10:36,825 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2018-10-14 18:10:37,428 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-14 18:10:38,124 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2018-10-14 18:10:38,301 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 49 [2018-10-14 18:10:38,864 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 49 [2018-10-14 18:10:39,048 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 49 [2018-10-14 18:10:39,644 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 49 [2018-10-14 18:10:39,851 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 49 [2018-10-14 18:10:40,470 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 49 [2018-10-14 18:10:40,694 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 49 [2018-10-14 18:10:41,055 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 49 [2018-10-14 18:10:41,374 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 56 [2018-10-14 18:10:41,623 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 18:10:41,811 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 18:10:42,096 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 18:10:42,359 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 18:10:42,622 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 18:10:42,798 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 18:10:42,984 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 18:10:43,233 WARN L179 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 18:10:43,491 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 18:10:43,684 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 18:10:43,877 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 18:10:44,133 WARN L179 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 18:10:44,406 WARN L179 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 18:10:44,595 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 18:10:44,791 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 18:10:45,049 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 18:10:45,323 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 18:10:45,520 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 18:10:45,718 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 18:10:45,999 WARN L179 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 18:10:46,278 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 18:10:46,475 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 18:10:46,677 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 18:10:46,943 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 18:10:47,283 WARN L179 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 18:10:47,490 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 18:10:47,695 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 18:10:47,979 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 18:10:48,294 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 58 [2018-10-14 18:10:48,510 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2018-10-14 18:10:48,724 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2018-10-14 18:10:49,007 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 57 [2018-10-14 18:10:49,302 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 58 [2018-10-14 18:10:49,506 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2018-10-14 18:10:49,813 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 57 [2018-10-14 18:10:50,100 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 58 [2018-10-14 18:10:50,305 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 50 [2018-10-14 18:10:50,600 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 57 [2018-10-14 18:10:50,892 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2018-10-14 18:10:51,363 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2018-10-14 18:10:51,608 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2018-10-14 18:10:52,058 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2018-10-14 18:10:52,366 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2018-10-14 18:10:52,822 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2018-10-14 18:10:53,072 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2018-10-14 18:10:54,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:10:54,710 INFO L93 Difference]: Finished difference Result 362 states and 362 transitions. [2018-10-14 18:10:54,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-14 18:10:54,710 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 339 [2018-10-14 18:10:54,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:10:54,712 INFO L225 Difference]: With dead ends: 362 [2018-10-14 18:10:54,712 INFO L226 Difference]: Without dead ends: 362 [2018-10-14 18:10:54,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6491 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=5471, Invalid=23599, Unknown=0, NotChecked=0, Total=29070 [2018-10-14 18:10:54,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2018-10-14 18:10:54,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 352. [2018-10-14 18:10:54,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-10-14 18:10:54,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 352 transitions. [2018-10-14 18:10:54,718 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 352 transitions. Word has length 339 [2018-10-14 18:10:54,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:10:54,718 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 352 transitions. [2018-10-14 18:10:54,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-14 18:10:54,719 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 352 transitions. [2018-10-14 18:10:54,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-10-14 18:10:54,721 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:10:54,721 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 18:10:54,721 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:10:54,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:10:54,722 INFO L82 PathProgramCache]: Analyzing trace with hash 586560575, now seen corresponding path program 25 times [2018-10-14 18:10:54,722 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:10:54,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:10:57,230 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 18:10:57,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:10:57,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-10-14 18:10:57,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-14 18:10:57,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-14 18:10:57,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=771, Invalid=3785, Unknown=0, NotChecked=0, Total=4556 [2018-10-14 18:10:57,232 INFO L87 Difference]: Start difference. First operand 352 states and 352 transitions. Second operand 68 states. [2018-10-14 18:11:02,419 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:11:02,608 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:11:04,931 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:11:07,705 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:11:17,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:11:17,195 INFO L93 Difference]: Finished difference Result 374 states and 374 transitions. [2018-10-14 18:11:17,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-10-14 18:11:17,195 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 351 [2018-10-14 18:11:17,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:11:17,197 INFO L225 Difference]: With dead ends: 374 [2018-10-14 18:11:17,197 INFO L226 Difference]: Without dead ends: 374 [2018-10-14 18:11:17,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8218 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=8154, Invalid=25886, Unknown=0, NotChecked=0, Total=34040 [2018-10-14 18:11:17,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2018-10-14 18:11:17,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 364. [2018-10-14 18:11:17,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-10-14 18:11:17,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 364 transitions. [2018-10-14 18:11:17,205 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 364 transitions. Word has length 351 [2018-10-14 18:11:17,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:11:17,205 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 364 transitions. [2018-10-14 18:11:17,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-14 18:11:17,206 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 364 transitions. [2018-10-14 18:11:17,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-10-14 18:11:17,208 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:11:17,208 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 18:11:17,208 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:11:17,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:11:17,208 INFO L82 PathProgramCache]: Analyzing trace with hash -2019313113, now seen corresponding path program 26 times [2018-10-14 18:11:17,209 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:11:17,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:11:17,782 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-14 18:11:20,333 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 18:11:20,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:11:20,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-10-14 18:11:20,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-14 18:11:20,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-14 18:11:20,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=775, Invalid=4055, Unknown=0, NotChecked=0, Total=4830 [2018-10-14 18:11:20,335 INFO L87 Difference]: Start difference. First operand 364 states and 364 transitions. Second operand 70 states. [2018-10-14 18:11:22,632 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-14 18:11:22,780 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:22,951 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-14 18:11:23,312 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:23,453 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:23,879 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:24,032 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:24,485 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:24,644 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:25,096 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:25,253 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:25,724 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:25,898 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:26,383 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:27,023 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:27,863 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:28,086 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-14 18:11:28,490 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:28,680 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:29,195 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:29,385 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:29,914 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:30,116 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:30,648 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:32,156 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:32,937 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:33,177 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:33,815 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:34,046 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:34,629 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:35,473 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:35,733 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:36,341 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:37,216 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:38,117 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:38,421 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-14 18:11:39,090 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-14 18:11:40,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:11:40,457 INFO L93 Difference]: Finished difference Result 386 states and 386 transitions. [2018-10-14 18:11:40,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-10-14 18:11:40,457 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 363 [2018-10-14 18:11:40,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:11:40,459 INFO L225 Difference]: With dead ends: 386 [2018-10-14 18:11:40,459 INFO L226 Difference]: Without dead ends: 386 [2018-10-14 18:11:40,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8540 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=8294, Invalid=27238, Unknown=0, NotChecked=0, Total=35532 [2018-10-14 18:11:40,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2018-10-14 18:11:40,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 376. [2018-10-14 18:11:40,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2018-10-14 18:11:40,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 376 transitions. [2018-10-14 18:11:40,465 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 376 transitions. Word has length 363 [2018-10-14 18:11:40,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:11:40,466 INFO L481 AbstractCegarLoop]: Abstraction has 376 states and 376 transitions. [2018-10-14 18:11:40,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-14 18:11:40,466 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 376 transitions. [2018-10-14 18:11:40,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-10-14 18:11:40,468 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:11:40,469 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 18:11:40,469 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:11:40,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:11:40,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1980783601, now seen corresponding path program 27 times [2018-10-14 18:11:40,470 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:11:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:11:44,656 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 18:11:44,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:11:44,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-10-14 18:11:44,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-14 18:11:44,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-14 18:11:44,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=883, Invalid=4229, Unknown=0, NotChecked=0, Total=5112 [2018-10-14 18:11:44,658 INFO L87 Difference]: Start difference. First operand 376 states and 376 transitions. Second operand 72 states. [2018-10-14 18:11:51,084 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:11:53,593 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:11:53,820 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:11:58,687 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:11:58,966 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:12:03,776 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:12:04,133 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:12:04,823 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:12:06,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:12:06,471 INFO L93 Difference]: Finished difference Result 398 states and 398 transitions. [2018-10-14 18:12:06,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-14 18:12:06,471 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 375 [2018-10-14 18:12:06,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:12:06,473 INFO L225 Difference]: With dead ends: 398 [2018-10-14 18:12:06,473 INFO L226 Difference]: Without dead ends: 398 [2018-10-14 18:12:06,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9429 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=9243, Invalid=29369, Unknown=0, NotChecked=0, Total=38612 [2018-10-14 18:12:06,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2018-10-14 18:12:06,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 388. [2018-10-14 18:12:06,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-10-14 18:12:06,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 388 transitions. [2018-10-14 18:12:06,480 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 388 transitions. Word has length 375 [2018-10-14 18:12:06,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:12:06,480 INFO L481 AbstractCegarLoop]: Abstraction has 388 states and 388 transitions. [2018-10-14 18:12:06,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-14 18:12:06,480 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 388 transitions. [2018-10-14 18:12:06,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-10-14 18:12:06,483 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:12:06,483 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 18:12:06,483 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:12:06,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:12:06,483 INFO L82 PathProgramCache]: Analyzing trace with hash -614206985, now seen corresponding path program 28 times [2018-10-14 18:12:06,484 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:12:06,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:12:10,226 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 18:12:10,226 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:12:10,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-10-14 18:12:10,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-14 18:12:10,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-14 18:12:10,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=4619, Unknown=0, NotChecked=0, Total=5402 [2018-10-14 18:12:10,227 INFO L87 Difference]: Start difference. First operand 388 states and 388 transitions. Second operand 74 states. [2018-10-14 18:12:13,346 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-14 18:12:13,984 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-14 18:12:14,194 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:14,405 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-14 18:12:14,755 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:14,924 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:15,405 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:15,583 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:16,076 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:16,265 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:16,778 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:16,972 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:17,508 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:17,706 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:18,245 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:18,449 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:18,999 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:19,276 WARN L179 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:19,888 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:20,113 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:20,706 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:20,934 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:21,543 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:21,782 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:22,383 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:22,628 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:23,248 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:23,493 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:24,119 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:24,414 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:25,073 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:25,336 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:26,005 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:26,289 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:26,973 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:27,259 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:27,942 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:28,232 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:28,936 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:29,233 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:29,501 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-14 18:12:29,747 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-14 18:12:30,007 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:30,306 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-14 18:12:31,032 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-14 18:12:31,316 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-14 18:12:31,826 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-14 18:12:34,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:12:34,004 INFO L93 Difference]: Finished difference Result 410 states and 410 transitions. [2018-10-14 18:12:34,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-14 18:12:34,004 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 387 [2018-10-14 18:12:34,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:12:34,006 INFO L225 Difference]: With dead ends: 410 [2018-10-14 18:12:34,006 INFO L226 Difference]: Without dead ends: 410 [2018-10-14 18:12:34,009 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9425 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=8673, Invalid=30729, Unknown=0, NotChecked=0, Total=39402 [2018-10-14 18:12:34,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2018-10-14 18:12:34,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 400. [2018-10-14 18:12:34,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2018-10-14 18:12:34,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 400 transitions. [2018-10-14 18:12:34,013 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 400 transitions. Word has length 387 [2018-10-14 18:12:34,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:12:34,014 INFO L481 AbstractCegarLoop]: Abstraction has 400 states and 400 transitions. [2018-10-14 18:12:34,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-14 18:12:34,014 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 400 transitions. [2018-10-14 18:12:34,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-10-14 18:12:34,016 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:12:34,017 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 18:12:34,017 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:12:34,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:12:34,018 INFO L82 PathProgramCache]: Analyzing trace with hash 780837855, now seen corresponding path program 29 times [2018-10-14 18:12:34,018 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:12:34,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:12:37,361 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 18:12:37,362 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:12:37,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-10-14 18:12:37,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-14 18:12:37,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-14 18:12:37,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1003, Invalid=4697, Unknown=0, NotChecked=0, Total=5700 [2018-10-14 18:12:37,363 INFO L87 Difference]: Start difference. First operand 400 states and 400 transitions. Second operand 76 states. [2018-10-14 18:12:45,057 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-14 18:12:48,772 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:12:50,127 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:12:55,117 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:13:01,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:13:01,384 INFO L93 Difference]: Finished difference Result 422 states and 422 transitions. [2018-10-14 18:13:01,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-10-14 18:13:01,385 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 399 [2018-10-14 18:13:01,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:13:01,387 INFO L225 Difference]: With dead ends: 422 [2018-10-14 18:13:01,388 INFO L226 Difference]: Without dead ends: 422 [2018-10-14 18:13:01,391 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 18:13:01,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2018-10-14 18:13:01,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 412. [2018-10-14 18:13:01,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-10-14 18:13:01,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 412 transitions. [2018-10-14 18:13:01,395 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 412 transitions. Word has length 399 [2018-10-14 18:13:01,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:13:01,395 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 412 transitions. [2018-10-14 18:13:01,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-14 18:13:01,396 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 412 transitions. [2018-10-14 18:13:01,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-10-14 18:13:01,397 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:13:01,398 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 18:13:01,398 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:13:01,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:13:01,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1225934393, now seen corresponding path program 30 times [2018-10-14 18:13:01,399 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:13:01,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:13:04,489 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 18:13:04,489 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:13:04,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-10-14 18:13:04,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-14 18:13:04,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-14 18:13:04,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1007, Invalid=4999, Unknown=0, NotChecked=0, Total=6006 [2018-10-14 18:13:04,491 INFO L87 Difference]: Start difference. First operand 412 states and 412 transitions. Second operand 78 states. [2018-10-14 18:13:07,486 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-14 18:13:08,084 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:08,660 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:08,807 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:09,256 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:09,412 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:09,864 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:10,023 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:10,571 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:10,765 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:11,248 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:11,425 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:11,903 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:12,575 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:12,758 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:13,271 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:13,462 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:13,988 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:14,187 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:14,729 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:15,505 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:15,754 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:16,356 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:17,152 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:17,388 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:17,984 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:18,214 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:18,821 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:19,064 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:19,709 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:19,980 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:20,622 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:20,904 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:21,570 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:21,824 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:22,488 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:22,755 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:23,421 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:23,684 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:24,343 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:25,283 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:25,864 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-14 18:13:27,352 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:28,324 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-14 18:13:29,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:13:29,831 INFO L93 Difference]: Finished difference Result 434 states and 434 transitions. [2018-10-14 18:13:29,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-10-14 18:13:29,831 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 411 [2018-10-14 18:13:29,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:13:29,833 INFO L225 Difference]: With dead ends: 434 [2018-10-14 18:13:29,833 INFO L226 Difference]: Without dead ends: 434 [2018-10-14 18:13:29,835 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11090 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=10556, Invalid=34600, Unknown=0, NotChecked=0, Total=45156 [2018-10-14 18:13:29,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-10-14 18:13:29,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 424. [2018-10-14 18:13:29,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-10-14 18:13:29,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 424 transitions. [2018-10-14 18:13:29,839 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 424 transitions. Word has length 411 [2018-10-14 18:13:29,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:13:29,840 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 424 transitions. [2018-10-14 18:13:29,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-14 18:13:29,840 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 424 transitions. [2018-10-14 18:13:29,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-10-14 18:13:29,842 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:13:29,843 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 18:13:29,843 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:13:29,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:13:29,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1458097233, now seen corresponding path program 31 times [2018-10-14 18:13:29,844 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:13:29,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:13:33,502 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 18:13:33,503 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:13:33,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-14 18:13:33,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-14 18:13:33,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-14 18:13:33,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1131, Invalid=5189, Unknown=0, NotChecked=0, Total=6320 [2018-10-14 18:13:33,505 INFO L87 Difference]: Start difference. First operand 424 states and 424 transitions. Second operand 80 states. [2018-10-14 18:13:41,437 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-14 18:13:46,870 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:13:49,909 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:13:51,476 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-14 18:13:56,560 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:14:00,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:14:00,002 INFO L93 Difference]: Finished difference Result 446 states and 446 transitions. [2018-10-14 18:14:00,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-10-14 18:14:00,003 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 423 [2018-10-14 18:14:00,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:14:00,005 INFO L225 Difference]: With dead ends: 446 [2018-10-14 18:14:00,005 INFO L226 Difference]: Without dead ends: 446 [2018-10-14 18:14:00,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12103 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=11625, Invalid=36995, Unknown=0, NotChecked=0, Total=48620 [2018-10-14 18:14:00,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2018-10-14 18:14:00,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 436. [2018-10-14 18:14:00,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2018-10-14 18:14:00,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 436 transitions. [2018-10-14 18:14:00,012 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 436 transitions. Word has length 423 [2018-10-14 18:14:00,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:14:00,012 INFO L481 AbstractCegarLoop]: Abstraction has 436 states and 436 transitions. [2018-10-14 18:14:00,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-14 18:14:00,013 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 436 transitions. [2018-10-14 18:14:00,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-10-14 18:14:00,015 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:14:00,015 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 18:14:00,015 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:14:00,016 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:14:00,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1164897897, now seen corresponding path program 32 times [2018-10-14 18:14:00,016 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:14:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:14:04,965 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 18:14:04,965 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:14:04,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-14 18:14:04,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-14 18:14:04,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-14 18:14:04,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=6090, Unknown=0, NotChecked=0, Total=6320 [2018-10-14 18:14:04,967 INFO L87 Difference]: Start difference. First operand 436 states and 436 transitions. Second operand 80 states.