java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplTransformed.xml -s ../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf -i ../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_false-valid-free.i_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-093a8c0 [2018-10-14 18:05:53,444 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-14 18:05:53,447 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-14 18:05:53,461 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-14 18:05:53,461 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-14 18:05:53,462 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-14 18:05:53,464 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-14 18:05:53,465 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-14 18:05:53,467 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-14 18:05:53,468 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-14 18:05:53,469 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-14 18:05:53,469 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-14 18:05:53,470 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-14 18:05:53,471 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-14 18:05:53,473 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-14 18:05:53,473 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-14 18:05:53,474 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-14 18:05:53,476 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-14 18:05:53,478 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-14 18:05:53,480 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-14 18:05:53,481 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-14 18:05:53,482 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-14 18:05:53,485 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-14 18:05:53,486 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-14 18:05:53,486 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-14 18:05:53,487 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-14 18:05:53,488 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-14 18:05:53,489 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-14 18:05:53,490 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-14 18:05:53,491 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-14 18:05:53,491 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-14 18:05:53,492 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-14 18:05:53,494 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 18:05:53,504 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-14 18:05:53,505 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-14 18:05:53,506 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-14 18:05:53,506 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-14 18:05:53,506 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-14 18:05:53,506 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-14 18:05:53,507 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-14 18:05:53,507 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-14 18:05:53,507 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-14 18:05:53,508 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-14 18:05:53,511 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-14 18:05:53,511 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-14 18:05:53,511 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-14 18:05:53,512 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-14 18:05:53,513 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-14 18:05:53,574 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-14 18:05:53,591 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-14 18:05:53,596 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-14 18:05:53,598 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-14 18:05:53,599 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-14 18:05:53,599 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_false-valid-free.i_5.bpl [2018-10-14 18:05:53,600 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_false-valid-free.i_5.bpl' [2018-10-14 18:05:53,674 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-14 18:05:53,676 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-14 18:05:53,677 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-14 18:05:53,677 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-14 18:05:53,677 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-14 18:05:53,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:05:53" (1/1) ... [2018-10-14 18:05:53,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:05:53" (1/1) ... [2018-10-14 18:05:53,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:05:53" (1/1) ... [2018-10-14 18:05:53,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:05:53" (1/1) ... [2018-10-14 18:05:53,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:05:53" (1/1) ... [2018-10-14 18:05:53,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:05:53" (1/1) ... [2018-10-14 18:05:53,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:05:53" (1/1) ... [2018-10-14 18:05:53,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-14 18:05:53,733 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-14 18:05:53,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-14 18:05:53,734 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-14 18:05:53,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:05:53" (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 18:05:53,826 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-14 18:05:53,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-14 18:05:53,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-14 18:05:54,403 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-14 18:05:54,404 INFO L202 PluginConnector]: Adding new model 960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:05:54 BoogieIcfgContainer [2018-10-14 18:05:54,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-14 18:05:54,405 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2018-10-14 18:05:54,405 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2018-10-14 18:05:54,406 INFO L276 PluginConnector]: IcfgTransformer initialized [2018-10-14 18:05:54,410 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:05:54" (1/1) ... [2018-10-14 18:05:54,419 INFO L137 apSepIcfgTransformer]: HeapSepIcfgTransformer: Starting heap partitioning [2018-10-14 18:05:54,419 INFO L138 apSepIcfgTransformer]: To be partitioned heap arrays found [#memory_int] [2018-10-14 18:05:54,457 INFO L191 apSepIcfgTransformer]: Heap separator: starting loc-array-style preprocessing [2018-10-14 18:05:54,507 INFO L219 apSepIcfgTransformer]: finished MemlocArrayUpdater [2018-10-14 18:05:54,527 INFO L282 apSepIcfgTransformer]: finished preprocessing for the equality analysis [2018-10-14 18:05:54,598 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=1) [2018-10-14 18:06:26,409 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 18:06:26,411 INFO L306 apSepIcfgTransformer]: finished equality analysis [2018-10-14 18:06:26,414 INFO L318 apSepIcfgTransformer]: Finished detection of select terms ("array reads") [2018-10-14 18:06:26,451 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 18:06:26,491 INFO L232 HeapPartitionManager]: partitioning result: [2018-10-14 18:06:26,491 INFO L237 HeapPartitionManager]: location blocks for array group [#memory_int, ULTIMATE.start_write~int_old_#memory_int] [2018-10-14 18:06:26,492 INFO L246 HeapPartitionManager]: at dimension 1 [2018-10-14 18:06:26,492 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 3 [2018-10-14 18:06:26,492 INFO L248 HeapPartitionManager]: # location blocks :2 [2018-10-14 18:06:26,492 INFO L246 HeapPartitionManager]: at dimension 2 [2018-10-14 18:06:26,492 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 0 [2018-10-14 18:06:26,493 INFO L248 HeapPartitionManager]: # location blocks :0 [2018-10-14 18:06:26,493 INFO L237 HeapPartitionManager]: location blocks for array group [#memory_int, ULTIMATE.start_write~int_old_#memory_int] [2018-10-14 18:06:26,493 INFO L246 HeapPartitionManager]: at dimension 1 [2018-10-14 18:06:26,493 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 3 [2018-10-14 18:06:26,493 INFO L248 HeapPartitionManager]: # location blocks :2 [2018-10-14 18:06:26,494 INFO L246 HeapPartitionManager]: at dimension 2 [2018-10-14 18:06:26,494 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 0 [2018-10-14 18:06:26,494 INFO L248 HeapPartitionManager]: # location blocks :0 [2018-10-14 18:06:26,495 INFO L145 ransitionTransformer]: executing heap partitioning transformation [2018-10-14 18:06:26,512 INFO L202 PluginConnector]: Adding new model 960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.10 06:06:26 BasicIcfg [2018-10-14 18:06:26,513 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2018-10-14 18:06:26,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-14 18:06:26,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-14 18:06:26,518 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-14 18:06:26,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:05:53" (1/3) ... [2018-10-14 18:06:26,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fcc4e19 and model type 960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:06:26, skipping insertion in model container [2018-10-14 18:06:26,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:05:54" (2/3) ... [2018-10-14 18:06:26,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fcc4e19 and model type 960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 06:06:26, skipping insertion in model container [2018-10-14 18:06:26,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.10 06:06:26" (3/3) ... [2018-10-14 18:06:26,523 INFO L112 eAbstractionObserver]: Analyzing ICFG memPartitionedIcfg [2018-10-14 18:06:26,534 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-10-14 18:06:26,543 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-14 18:06:26,562 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-14 18:06:26,587 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-14 18:06:26,588 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-14 18:06:26,588 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-14 18:06:26,589 INFO L384 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-10-14 18:06:26,589 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-14 18:06:26,589 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-14 18:06:26,589 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-14 18:06:26,589 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-14 18:06:26,590 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-14 18:06:26,602 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2018-10-14 18:06:26,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-14 18:06:26,610 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:06:26,611 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 18:06:26,612 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:06:26,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:06:26,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1565987991, now seen corresponding path program 1 times [2018-10-14 18:06:26,675 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:06:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:06:27,992 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 18:06:27,995 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-14 18:06:27,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2018-10-14 18:06:28,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-14 18:06:28,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-14 18:06:28,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-10-14 18:06:28,016 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 14 states. [2018-10-14 18:06:28,924 WARN L179 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2018-10-14 18:06:29,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:06:29,523 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-14 18:06:29,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-14 18:06:29,525 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2018-10-14 18:06:29,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:06:29,536 INFO L225 Difference]: With dead ends: 74 [2018-10-14 18:06:29,536 INFO L226 Difference]: Without dead ends: 74 [2018-10-14 18:06:29,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2018-10-14 18:06:29,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-14 18:06:29,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2018-10-14 18:06:29,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-14 18:06:29,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-14 18:06:29,576 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 51 [2018-10-14 18:06:29,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:06:29,577 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-14 18:06:29,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-14 18:06:29,577 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-14 18:06:29,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-14 18:06:29,579 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:06:29,580 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 18:06:29,580 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:06:29,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:06:29,581 INFO L82 PathProgramCache]: Analyzing trace with hash -725690753, now seen corresponding path program 1 times [2018-10-14 18:06:29,582 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:06:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:06:30,125 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 18:06:30,126 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:06:30,126 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-14 18:06:30,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-14 18:06:30,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-14 18:06:30,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2018-10-14 18:06:30,129 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 17 states. [2018-10-14 18:06:31,667 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-14 18:06:31,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:06:31,849 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-14 18:06:31,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-14 18:06:31,851 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2018-10-14 18:06:31,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:06:31,853 INFO L225 Difference]: With dead ends: 86 [2018-10-14 18:06:31,853 INFO L226 Difference]: Without dead ends: 86 [2018-10-14 18:06:31,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=388, Invalid=1094, Unknown=0, NotChecked=0, Total=1482 [2018-10-14 18:06:31,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-14 18:06:31,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2018-10-14 18:06:31,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-14 18:06:31,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-14 18:06:31,863 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 63 [2018-10-14 18:06:31,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:06:31,863 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-14 18:06:31,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-14 18:06:31,864 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-14 18:06:31,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-14 18:06:31,866 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:06:31,866 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 18:06:31,866 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:06:31,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:06:31,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1481309287, now seen corresponding path program 2 times [2018-10-14 18:06:31,868 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:06:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:06:32,367 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 18:06:32,368 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:06:32,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-14 18:06:32,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-14 18:06:32,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-14 18:06:32,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2018-10-14 18:06:32,369 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 20 states. [2018-10-14 18:06:33,180 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2018-10-14 18:06:33,659 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-14 18:06:34,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:06:34,370 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-14 18:06:34,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-14 18:06:34,371 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2018-10-14 18:06:34,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:06:34,374 INFO L225 Difference]: With dead ends: 98 [2018-10-14 18:06:34,374 INFO L226 Difference]: Without dead ends: 98 [2018-10-14 18:06:34,375 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 18:06:34,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-14 18:06:34,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2018-10-14 18:06:34,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-14 18:06:34,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-14 18:06:34,383 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 75 [2018-10-14 18:06:34,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:06:34,384 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-14 18:06:34,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-14 18:06:34,384 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-14 18:06:34,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-14 18:06:34,387 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:06:34,387 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 18:06:34,387 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:06:34,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:06:34,388 INFO L82 PathProgramCache]: Analyzing trace with hash 8750671, now seen corresponding path program 3 times [2018-10-14 18:06:34,389 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:06:34,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:06:34,903 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 18:06:34,903 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:06:34,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-14 18:06:34,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-14 18:06:34,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-14 18:06:34,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2018-10-14 18:06:34,905 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 22 states. [2018-10-14 18:06:37,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:06:37,641 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-14 18:06:37,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-14 18:06:37,645 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 87 [2018-10-14 18:06:37,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:06:37,647 INFO L225 Difference]: With dead ends: 110 [2018-10-14 18:06:37,647 INFO L226 Difference]: Without dead ends: 110 [2018-10-14 18:06:37,648 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 18:06:37,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-14 18:06:37,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2018-10-14 18:06:37,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-14 18:06:37,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-14 18:06:37,658 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 87 [2018-10-14 18:06:37,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:06:37,658 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-14 18:06:37,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-14 18:06:37,659 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-14 18:06:37,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-14 18:06:37,660 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:06:37,661 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 18:06:37,661 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:06:37,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:06:37,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1727558711, now seen corresponding path program 4 times [2018-10-14 18:06:37,662 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:06:37,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:06:38,258 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 18:06:38,259 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:06:38,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-14 18:06:38,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-14 18:06:38,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-14 18:06:38,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2018-10-14 18:06:38,260 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 24 states. [2018-10-14 18:06:40,849 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2018-10-14 18:06:41,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:06:41,118 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-10-14 18:06:41,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-14 18:06:41,119 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 99 [2018-10-14 18:06:41,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:06:41,122 INFO L225 Difference]: With dead ends: 122 [2018-10-14 18:06:41,122 INFO L226 Difference]: Without dead ends: 122 [2018-10-14 18:06:41,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=623, Invalid=2347, Unknown=0, NotChecked=0, Total=2970 [2018-10-14 18:06:41,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-14 18:06:41,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 112. [2018-10-14 18:06:41,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-14 18:06:41,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-14 18:06:41,130 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 99 [2018-10-14 18:06:41,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:06:41,131 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-14 18:06:41,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-14 18:06:41,131 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-14 18:06:41,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-14 18:06:41,133 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:06:41,133 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 18:06:41,133 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:06:41,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:06:41,134 INFO L82 PathProgramCache]: Analyzing trace with hash 640534047, now seen corresponding path program 5 times [2018-10-14 18:06:41,135 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:06:41,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:06:42,118 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 18:06:42,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:06:42,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-14 18:06:42,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-14 18:06:42,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-14 18:06:42,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2018-10-14 18:06:42,120 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 28 states. [2018-10-14 18:06:43,734 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-14 18:06:43,882 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:06:44,014 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-14 18:06:44,317 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:06:44,473 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:06:45,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:06:45,697 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-10-14 18:06:45,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-14 18:06:45,698 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 111 [2018-10-14 18:06:45,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:06:45,699 INFO L225 Difference]: With dead ends: 134 [2018-10-14 18:06:45,699 INFO L226 Difference]: Without dead ends: 134 [2018-10-14 18:06:45,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1004, Invalid=3156, Unknown=0, NotChecked=0, Total=4160 [2018-10-14 18:06:45,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-14 18:06:45,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 124. [2018-10-14 18:06:45,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-14 18:06:45,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-10-14 18:06:45,708 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 111 [2018-10-14 18:06:45,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:06:45,708 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-10-14 18:06:45,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-14 18:06:45,709 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-10-14 18:06:45,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-14 18:06:45,711 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:06:45,711 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 18:06:45,711 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:06:45,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:06:45,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1504672775, now seen corresponding path program 6 times [2018-10-14 18:06:45,712 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:06:45,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:06:46,481 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 18:06:46,482 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:06:46,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-10-14 18:06:46,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-14 18:06:46,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-14 18:06:46,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2018-10-14 18:06:46,483 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 30 states. [2018-10-14 18:06:48,350 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2018-10-14 18:06:48,961 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-14 18:06:49,311 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:06:49,778 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:06:51,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:06:51,129 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-10-14 18:06:51,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-14 18:06:51,129 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 123 [2018-10-14 18:06:51,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:06:51,131 INFO L225 Difference]: With dead ends: 146 [2018-10-14 18:06:51,131 INFO L226 Difference]: Without dead ends: 146 [2018-10-14 18:06:51,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1064, Invalid=3628, Unknown=0, NotChecked=0, Total=4692 [2018-10-14 18:06:51,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-14 18:06:51,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 136. [2018-10-14 18:06:51,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-14 18:06:51,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-10-14 18:06:51,138 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 123 [2018-10-14 18:06:51,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:06:51,139 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-10-14 18:06:51,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-14 18:06:51,139 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-10-14 18:06:51,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-14 18:06:51,141 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:06:51,141 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 18:06:51,142 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:06:51,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:06:51,142 INFO L82 PathProgramCache]: Analyzing trace with hash 503813615, now seen corresponding path program 7 times [2018-10-14 18:06:51,143 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:06:51,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:06:52,064 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 18:06:52,064 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:06:52,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-14 18:06:52,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-14 18:06:52,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-14 18:06:52,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2018-10-14 18:06:52,066 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 32 states. [2018-10-14 18:06:52,739 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-14 18:06:54,017 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-14 18:06:57,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:06:57,490 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-10-14 18:06:57,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-14 18:06:57,490 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 135 [2018-10-14 18:06:57,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:06:57,492 INFO L225 Difference]: With dead ends: 158 [2018-10-14 18:06:57,492 INFO L226 Difference]: Without dead ends: 158 [2018-10-14 18:06:57,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1413, Invalid=4439, Unknown=0, NotChecked=0, Total=5852 [2018-10-14 18:06:57,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-14 18:06:57,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2018-10-14 18:06:57,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-14 18:06:57,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-14 18:06:57,499 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 135 [2018-10-14 18:06:57,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:06:57,500 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-14 18:06:57,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-14 18:06:57,500 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-14 18:06:57,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-14 18:06:57,502 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:06:57,502 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 18:06:57,503 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:06:57,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:06:57,503 INFO L82 PathProgramCache]: Analyzing trace with hash 281023447, now seen corresponding path program 8 times [2018-10-14 18:06:57,504 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:06:57,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:06:58,856 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 18:06:58,856 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:06:58,856 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-14 18:06:58,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-14 18:06:58,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-14 18:06:58,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2018-10-14 18:06:58,858 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 32 states. [2018-10-14 18:07:04,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:07:04,238 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2018-10-14 18:07:04,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-14 18:07:04,239 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 147 [2018-10-14 18:07:04,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:07:04,240 INFO L225 Difference]: With dead ends: 170 [2018-10-14 18:07:04,241 INFO L226 Difference]: Without dead ends: 170 [2018-10-14 18:07:04,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=927, Invalid=4623, Unknown=0, NotChecked=0, Total=5550 [2018-10-14 18:07:04,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-14 18:07:04,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2018-10-14 18:07:04,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-14 18:07:04,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-10-14 18:07:04,248 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 147 [2018-10-14 18:07:04,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:07:04,249 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-10-14 18:07:04,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-14 18:07:04,249 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-10-14 18:07:04,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-14 18:07:04,254 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:07:04,254 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 18:07:04,255 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:07:04,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:07:04,255 INFO L82 PathProgramCache]: Analyzing trace with hash -798820929, now seen corresponding path program 9 times [2018-10-14 18:07:04,256 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:07:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:07:05,250 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 18:07:05,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:07:05,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-10-14 18:07:05,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-14 18:07:05,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-14 18:07:05,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2018-10-14 18:07:05,252 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 36 states. [2018-10-14 18:07:07,027 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2018-10-14 18:07:07,227 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-14 18:07:08,824 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:07:10,480 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:07:11,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:07:11,444 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2018-10-14 18:07:11,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-14 18:07:11,445 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 159 [2018-10-14 18:07:11,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:07:11,446 INFO L225 Difference]: With dead ends: 182 [2018-10-14 18:07:11,446 INFO L226 Difference]: Without dead ends: 182 [2018-10-14 18:07:11,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1890, Invalid=5942, Unknown=0, NotChecked=0, Total=7832 [2018-10-14 18:07:11,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-14 18:07:11,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 172. [2018-10-14 18:07:11,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-10-14 18:07:11,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2018-10-14 18:07:11,452 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 159 [2018-10-14 18:07:11,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:07:11,452 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2018-10-14 18:07:11,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-14 18:07:11,453 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2018-10-14 18:07:11,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-14 18:07:11,454 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:07:11,454 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 18:07:11,454 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:07:11,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:07:11,455 INFO L82 PathProgramCache]: Analyzing trace with hash 2088385447, now seen corresponding path program 10 times [2018-10-14 18:07:11,455 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:07:11,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:07:12,551 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 18:07:12,552 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:07:12,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-14 18:07:12,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-14 18:07:12,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-14 18:07:12,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2018-10-14 18:07:12,554 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 38 states. [2018-10-14 18:07:14,939 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-14 18:07:15,086 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:15,517 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:15,661 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:16,063 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:16,216 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:16,699 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:16,858 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:17,345 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:17,520 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:17,952 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:18,127 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-14 18:07:18,570 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-14 18:07:19,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:07:19,478 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2018-10-14 18:07:19,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-14 18:07:19,479 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 171 [2018-10-14 18:07:19,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:07:19,481 INFO L225 Difference]: With dead ends: 194 [2018-10-14 18:07:19,481 INFO L226 Difference]: Without dead ends: 194 [2018-10-14 18:07:19,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1966, Invalid=6590, Unknown=0, NotChecked=0, Total=8556 [2018-10-14 18:07:19,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-14 18:07:19,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 184. [2018-10-14 18:07:19,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-14 18:07:19,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2018-10-14 18:07:19,489 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 171 [2018-10-14 18:07:19,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:07:19,490 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2018-10-14 18:07:19,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-14 18:07:19,490 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2018-10-14 18:07:19,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-14 18:07:19,491 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:07:19,491 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 18:07:19,491 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:07:19,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:07:19,492 INFO L82 PathProgramCache]: Analyzing trace with hash 898622863, now seen corresponding path program 11 times [2018-10-14 18:07:19,492 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:07:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:07:21,314 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 18:07:21,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:07:21,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-14 18:07:21,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-14 18:07:21,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-14 18:07:21,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1349, Unknown=0, NotChecked=0, Total=1560 [2018-10-14 18:07:21,316 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand 40 states. [2018-10-14 18:07:26,191 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:07:27,337 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:07:27,867 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:07:28,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:07:28,908 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2018-10-14 18:07:28,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-14 18:07:28,909 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 183 [2018-10-14 18:07:28,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:07:28,910 INFO L225 Difference]: With dead ends: 206 [2018-10-14 18:07:28,910 INFO L226 Difference]: Without dead ends: 206 [2018-10-14 18:07:28,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=2435, Invalid=7665, Unknown=0, NotChecked=0, Total=10100 [2018-10-14 18:07:28,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-10-14 18:07:28,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 196. [2018-10-14 18:07:28,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-14 18:07:28,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2018-10-14 18:07:28,916 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 183 [2018-10-14 18:07:28,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:07:28,916 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2018-10-14 18:07:28,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-14 18:07:28,916 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2018-10-14 18:07:28,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-10-14 18:07:28,917 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:07:28,917 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 18:07:28,918 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:07:28,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:07:28,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1657932937, now seen corresponding path program 12 times [2018-10-14 18:07:28,919 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:07:28,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:07:30,111 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 18:07:30,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:07:30,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-10-14 18:07:30,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-14 18:07:30,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-14 18:07:30,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2018-10-14 18:07:30,113 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 42 states. [2018-10-14 18:07:33,995 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-14 18:07:34,177 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:07:34,657 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:07:34,830 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:07:35,277 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:07:35,463 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:07:35,944 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:07:36,128 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-14 18:07:36,592 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-14 18:07:36,767 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-14 18:07:37,082 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-14 18:07:37,254 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-14 18:07:37,596 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2018-10-14 18:07:37,821 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2018-10-14 18:07:38,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:07:38,633 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2018-10-14 18:07:38,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-14 18:07:38,634 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 195 [2018-10-14 18:07:38,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:07:38,636 INFO L225 Difference]: With dead ends: 218 [2018-10-14 18:07:38,636 INFO L226 Difference]: Without dead ends: 218 [2018-10-14 18:07:38,638 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2105 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=2185, Invalid=8321, Unknown=0, NotChecked=0, Total=10506 [2018-10-14 18:07:38,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-10-14 18:07:38,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 208. [2018-10-14 18:07:38,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-14 18:07:38,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2018-10-14 18:07:38,642 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 195 [2018-10-14 18:07:38,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:07:38,643 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2018-10-14 18:07:38,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-14 18:07:38,643 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2018-10-14 18:07:38,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-14 18:07:38,644 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:07:38,644 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 18:07:38,644 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:07:38,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:07:38,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1440638303, now seen corresponding path program 13 times [2018-10-14 18:07:38,645 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:07:38,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:07:40,119 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 18:07:40,119 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:07:40,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-14 18:07:40,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-14 18:07:40,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-14 18:07:40,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1625, Unknown=0, NotChecked=0, Total=1892 [2018-10-14 18:07:40,121 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 44 states. [2018-10-14 18:07:42,820 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:07:47,910 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:07:49,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:07:49,086 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2018-10-14 18:07:49,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-14 18:07:49,087 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 207 [2018-10-14 18:07:49,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:07:49,088 INFO L225 Difference]: With dead ends: 230 [2018-10-14 18:07:49,088 INFO L226 Difference]: Without dead ends: 230 [2018-10-14 18:07:49,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2716 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=3048, Invalid=9608, Unknown=0, NotChecked=0, Total=12656 [2018-10-14 18:07:49,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-10-14 18:07:49,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 220. [2018-10-14 18:07:49,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-14 18:07:49,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 220 transitions. [2018-10-14 18:07:49,094 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 220 transitions. Word has length 207 [2018-10-14 18:07:49,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:07:49,094 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 220 transitions. [2018-10-14 18:07:49,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-14 18:07:49,094 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 220 transitions. [2018-10-14 18:07:49,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-14 18:07:49,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:07:49,096 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 18:07:49,096 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:07:49,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:07:49,096 INFO L82 PathProgramCache]: Analyzing trace with hash -2094318777, now seen corresponding path program 14 times [2018-10-14 18:07:49,097 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:07:49,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:07:50,373 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 18:07:50,374 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:07:50,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-14 18:07:50,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-14 18:07:50,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-14 18:07:50,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1799, Unknown=0, NotChecked=0, Total=2070 [2018-10-14 18:07:50,375 INFO L87 Difference]: Start difference. First operand 220 states and 220 transitions. Second operand 46 states. [2018-10-14 18:07:53,040 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-14 18:07:53,221 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:53,680 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:53,828 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:54,234 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:54,788 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:54,941 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:55,366 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:55,522 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:55,955 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:56,118 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:56,575 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:56,748 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:57,220 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:57,404 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:57,863 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:58,064 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:07:58,629 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:07:59,282 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-14 18:07:59,480 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2018-10-14 18:08:00,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:08:00,264 INFO L93 Difference]: Finished difference Result 242 states and 242 transitions. [2018-10-14 18:08:00,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-14 18:08:00,266 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 219 [2018-10-14 18:08:00,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:08:00,267 INFO L225 Difference]: With dead ends: 242 [2018-10-14 18:08:00,268 INFO L226 Difference]: Without dead ends: 242 [2018-10-14 18:08:00,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2906 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=3140, Invalid=10432, Unknown=0, NotChecked=0, Total=13572 [2018-10-14 18:08:00,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-10-14 18:08:00,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 232. [2018-10-14 18:08:00,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-10-14 18:08:00,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2018-10-14 18:08:00,274 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 219 [2018-10-14 18:08:00,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:08:00,277 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2018-10-14 18:08:00,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-14 18:08:00,277 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2018-10-14 18:08:00,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-10-14 18:08:00,279 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:08:00,279 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 18:08:00,280 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:08:00,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:08:00,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1235121455, now seen corresponding path program 15 times [2018-10-14 18:08:00,281 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:08:00,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:08:01,665 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 18:08:01,666 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:08:01,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-14 18:08:01,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-14 18:08:01,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-14 18:08:01,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1925, Unknown=0, NotChecked=0, Total=2256 [2018-10-14 18:08:01,668 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand 48 states. [2018-10-14 18:08:03,543 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-14 18:08:08,665 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:08:11,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:08:11,768 INFO L93 Difference]: Finished difference Result 254 states and 254 transitions. [2018-10-14 18:08:11,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-14 18:08:11,769 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 231 [2018-10-14 18:08:11,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:08:11,771 INFO L225 Difference]: With dead ends: 254 [2018-10-14 18:08:11,771 INFO L226 Difference]: Without dead ends: 254 [2018-10-14 18:08:11,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3423 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=3729, Invalid=11771, Unknown=0, NotChecked=0, Total=15500 [2018-10-14 18:08:11,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-10-14 18:08:11,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 244. [2018-10-14 18:08:11,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-10-14 18:08:11,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 244 transitions. [2018-10-14 18:08:11,777 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 244 transitions. Word has length 231 [2018-10-14 18:08:11,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:08:11,778 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 244 transitions. [2018-10-14 18:08:11,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-14 18:08:11,778 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 244 transitions. [2018-10-14 18:08:11,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-14 18:08:11,779 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:08:11,779 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 18:08:11,780 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:08:11,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:08:11,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1321341719, now seen corresponding path program 16 times [2018-10-14 18:08:11,781 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:08:11,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:08:14,229 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 18:08:14,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:08:14,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-14 18:08:14,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-14 18:08:14,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-14 18:08:14,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2122, Unknown=0, NotChecked=0, Total=2256 [2018-10-14 18:08:14,231 INFO L87 Difference]: Start difference. First operand 244 states and 244 transitions. Second operand 48 states. [2018-10-14 18:08:25,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:08:25,386 INFO L93 Difference]: Finished difference Result 266 states and 266 transitions. [2018-10-14 18:08:25,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-14 18:08:25,387 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 243 [2018-10-14 18:08:25,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:08:25,389 INFO L225 Difference]: With dead ends: 266 [2018-10-14 18:08:25,389 INFO L226 Difference]: Without dead ends: 266 [2018-10-14 18:08:25,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2323 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1535, Invalid=11575, Unknown=0, NotChecked=0, Total=13110 [2018-10-14 18:08:25,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-10-14 18:08:25,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 256. [2018-10-14 18:08:25,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-10-14 18:08:25,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 256 transitions. [2018-10-14 18:08:25,395 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 256 transitions. Word has length 243 [2018-10-14 18:08:25,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:08:25,395 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 256 transitions. [2018-10-14 18:08:25,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-14 18:08:25,395 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 256 transitions. [2018-10-14 18:08:25,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-10-14 18:08:25,397 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:08:25,397 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 18:08:25,397 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:08:25,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:08:25,397 INFO L82 PathProgramCache]: Analyzing trace with hash 958403839, now seen corresponding path program 17 times [2018-10-14 18:08:25,398 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:08:25,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:08:26,930 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 18:08:26,930 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:08:26,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-10-14 18:08:26,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-14 18:08:26,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-14 18:08:26,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=2249, Unknown=0, NotChecked=0, Total=2652 [2018-10-14 18:08:26,931 INFO L87 Difference]: Start difference. First operand 256 states and 256 transitions. Second operand 52 states. [2018-10-14 18:08:28,854 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2018-10-14 18:08:29,454 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-14 18:08:33,853 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:08:34,111 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:08:39,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:08:39,532 INFO L93 Difference]: Finished difference Result 278 states and 278 transitions. [2018-10-14 18:08:39,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-14 18:08:39,535 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 255 [2018-10-14 18:08:39,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:08:39,536 INFO L225 Difference]: With dead ends: 278 [2018-10-14 18:08:39,536 INFO L226 Difference]: Without dead ends: 278 [2018-10-14 18:08:39,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4214 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=4478, Invalid=14154, Unknown=0, NotChecked=0, Total=18632 [2018-10-14 18:08:39,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-10-14 18:08:39,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 268. [2018-10-14 18:08:39,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-10-14 18:08:39,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 268 transitions. [2018-10-14 18:08:39,542 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 268 transitions. Word has length 255 [2018-10-14 18:08:39,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:08:39,544 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 268 transitions. [2018-10-14 18:08:39,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-14 18:08:39,544 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 268 transitions. [2018-10-14 18:08:39,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-10-14 18:08:39,546 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:08:39,546 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 18:08:39,546 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:08:39,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:08:39,547 INFO L82 PathProgramCache]: Analyzing trace with hash 809663207, now seen corresponding path program 18 times [2018-10-14 18:08:39,547 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:08:39,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:08:41,512 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 18:08:41,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:08:41,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-10-14 18:08:41,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-14 18:08:41,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-14 18:08:41,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2455, Unknown=0, NotChecked=0, Total=2862 [2018-10-14 18:08:41,514 INFO L87 Difference]: Start difference. First operand 268 states and 268 transitions. Second operand 54 states. [2018-10-14 18:08:44,525 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-14 18:08:44,672 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:45,139 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:45,283 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:45,709 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:45,862 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:46,290 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:46,444 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:46,877 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:47,460 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:48,254 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:48,712 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:49,381 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:49,607 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:50,101 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:50,299 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:50,807 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:51,004 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:51,525 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:51,735 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:08:52,261 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:52,988 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:08:53,723 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-14 18:08:54,331 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2018-10-14 18:08:55,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:08:55,015 INFO L93 Difference]: Finished difference Result 290 states and 290 transitions. [2018-10-14 18:08:55,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-14 18:08:55,022 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 267 [2018-10-14 18:08:55,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:08:55,024 INFO L225 Difference]: With dead ends: 290 [2018-10-14 18:08:55,024 INFO L226 Difference]: Without dead ends: 290 [2018-10-14 18:08:55,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4448 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=4586, Invalid=15154, Unknown=0, NotChecked=0, Total=19740 [2018-10-14 18:08:55,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-10-14 18:08:55,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 280. [2018-10-14 18:08:55,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-10-14 18:08:55,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 280 transitions. [2018-10-14 18:08:55,030 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 280 transitions. Word has length 267 [2018-10-14 18:08:55,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:08:55,031 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 280 transitions. [2018-10-14 18:08:55,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-14 18:08:55,031 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 280 transitions. [2018-10-14 18:08:55,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-10-14 18:08:55,033 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:08:55,033 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 18:08:55,033 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:08:55,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:08:55,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1555252431, now seen corresponding path program 19 times [2018-10-14 18:08:55,034 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:08:55,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:08:56,865 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 18:08:56,865 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:08:56,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-10-14 18:08:56,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-14 18:08:56,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-14 18:08:56,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=2597, Unknown=0, NotChecked=0, Total=3080 [2018-10-14 18:08:56,866 INFO L87 Difference]: Start difference. First operand 280 states and 280 transitions. Second operand 56 states. [2018-10-14 18:08:59,336 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-14 18:08:59,472 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:09:00,652 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:09:03,154 WARN L179 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-14 18:09:04,653 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:09:04,867 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-14 18:09:09,220 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:09:09,819 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-14 18:09:10,093 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:09:11,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:09:11,445 INFO L93 Difference]: Finished difference Result 302 states and 302 transitions. [2018-10-14 18:09:11,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-14 18:09:11,445 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 279 [2018-10-14 18:09:11,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:09:11,447 INFO L225 Difference]: With dead ends: 302 [2018-10-14 18:09:11,447 INFO L226 Difference]: Without dead ends: 302 [2018-10-14 18:09:11,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5089 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=5295, Invalid=16757, Unknown=0, NotChecked=0, Total=22052 [2018-10-14 18:09:11,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2018-10-14 18:09:11,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 292. [2018-10-14 18:09:11,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-10-14 18:09:11,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 292 transitions. [2018-10-14 18:09:11,456 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 292 transitions. Word has length 279 [2018-10-14 18:09:11,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:09:11,459 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 292 transitions. [2018-10-14 18:09:11,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-14 18:09:11,459 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 292 transitions. [2018-10-14 18:09:11,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-10-14 18:09:11,461 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:09:11,461 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 18:09:11,461 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:09:11,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:09:11,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1744597687, now seen corresponding path program 20 times [2018-10-14 18:09:11,462 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:09:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:09:13,361 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 18:09:13,362 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:09:13,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-10-14 18:09:13,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-14 18:09:13,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-14 18:09:13,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=2891, Unknown=0, NotChecked=0, Total=3306 [2018-10-14 18:09:13,363 INFO L87 Difference]: Start difference. First operand 292 states and 292 transitions. Second operand 58 states. [2018-10-14 18:09:17,384 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-14 18:09:18,134 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-14 18:09:18,318 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:18,871 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:19,051 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:19,547 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:19,729 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:20,085 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-14 18:09:20,302 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:20,490 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:20,988 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:21,184 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:21,702 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:21,913 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:22,463 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:22,689 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:23,257 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:23,480 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:24,056 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:24,292 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:24,852 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:25,095 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:25,339 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-14 18:09:25,777 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:26,011 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:09:26,672 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:09:26,907 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-14 18:09:27,490 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-14 18:09:27,721 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-14 18:09:28,167 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-14 18:09:28,400 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-14 18:09:28,814 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2018-10-14 18:09:30,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:09:30,017 INFO L93 Difference]: Finished difference Result 314 states and 314 transitions. [2018-10-14 18:09:30,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-14 18:09:30,018 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 291 [2018-10-14 18:09:30,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:09:30,020 INFO L225 Difference]: With dead ends: 314 [2018-10-14 18:09:30,020 INFO L226 Difference]: Without dead ends: 314 [2018-10-14 18:09:30,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5093 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=4885, Invalid=17765, Unknown=0, NotChecked=0, Total=22650 [2018-10-14 18:09:30,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2018-10-14 18:09:30,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 304. [2018-10-14 18:09:30,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-10-14 18:09:30,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 304 transitions. [2018-10-14 18:09:30,027 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 304 transitions. Word has length 291 [2018-10-14 18:09:30,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:09:30,027 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 304 transitions. [2018-10-14 18:09:30,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-14 18:09:30,027 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 304 transitions. [2018-10-14 18:09:30,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-10-14 18:09:30,029 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:09:30,029 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 18:09:30,029 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:09:30,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:09:30,030 INFO L82 PathProgramCache]: Analyzing trace with hash -56097633, now seen corresponding path program 21 times [2018-10-14 18:09:30,031 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:09:30,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:09:32,414 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 18:09:32,415 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:09:32,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-10-14 18:09:32,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-14 18:09:32,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-14 18:09:32,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=2969, Unknown=0, NotChecked=0, Total=3540 [2018-10-14 18:09:32,416 INFO L87 Difference]: Start difference. First operand 304 states and 304 transitions. Second operand 60 states. [2018-10-14 18:09:35,468 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-14 18:09:35,626 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:09:40,579 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:09:45,574 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:09:47,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:09:47,534 INFO L93 Difference]: Finished difference Result 326 states and 326 transitions. [2018-10-14 18:09:47,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-14 18:09:47,540 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 303 [2018-10-14 18:09:47,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:09:47,541 INFO L225 Difference]: With dead ends: 326 [2018-10-14 18:09:47,542 INFO L226 Difference]: Without dead ends: 326 [2018-10-14 18:09:47,544 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 18:09:47,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2018-10-14 18:09:47,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 316. [2018-10-14 18:09:47,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-10-14 18:09:47,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 316 transitions. [2018-10-14 18:09:47,550 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 316 transitions. Word has length 303 [2018-10-14 18:09:47,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:09:47,551 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 316 transitions. [2018-10-14 18:09:47,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-14 18:09:47,551 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 316 transitions. [2018-10-14 18:09:47,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-10-14 18:09:47,552 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:09:47,553 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 18:09:47,553 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:09:47,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:09:47,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1178598023, now seen corresponding path program 22 times [2018-10-14 18:09:47,554 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:09:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:09:50,307 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 18:09:50,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:09:50,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-10-14 18:09:50,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-14 18:09:50,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-14 18:09:50,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=3207, Unknown=0, NotChecked=0, Total=3782 [2018-10-14 18:09:50,308 INFO L87 Difference]: Start difference. First operand 316 states and 316 transitions. Second operand 62 states. [2018-10-14 18:09:53,311 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-14 18:09:53,455 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:09:53,917 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:09:54,061 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:09:54,485 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:09:54,638 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:09:55,064 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:09:55,216 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:09:55,655 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:09:55,831 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:09:56,040 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-14 18:09:56,396 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:09:56,560 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:09:57,030 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:09:57,206 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:09:57,697 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:09:57,887 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:09:58,398 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:09:58,592 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:09:59,114 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:09:59,313 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:09:59,846 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:00,056 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:10:00,580 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:00,777 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:10:01,180 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-14 18:10:01,390 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:01,599 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:10:02,142 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:02,358 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:10:02,913 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:03,131 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:10:03,708 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:03,938 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:10:04,520 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:04,757 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:10:05,346 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:10:05,583 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-14 18:10:06,234 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-14 18:10:07,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:10:07,575 INFO L93 Difference]: Finished difference Result 338 states and 338 transitions. [2018-10-14 18:10:07,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-14 18:10:07,576 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 315 [2018-10-14 18:10:07,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:10:07,578 INFO L225 Difference]: With dead ends: 338 [2018-10-14 18:10:07,579 INFO L226 Difference]: Without dead ends: 338 [2018-10-14 18:10:07,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6326 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=6304, Invalid=20756, Unknown=0, NotChecked=0, Total=27060 [2018-10-14 18:10:07,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-10-14 18:10:07,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 328. [2018-10-14 18:10:07,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-10-14 18:10:07,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 328 transitions. [2018-10-14 18:10:07,585 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 328 transitions. Word has length 315 [2018-10-14 18:10:07,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:10:07,585 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 328 transitions. [2018-10-14 18:10:07,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-14 18:10:07,586 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 328 transitions. [2018-10-14 18:10:07,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-10-14 18:10:07,587 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:10:07,588 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 18:10:07,588 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:10:07,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:10:07,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1900958831, now seen corresponding path program 23 times [2018-10-14 18:10:07,589 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:10:07,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:10:09,750 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 18:10:09,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:10:09,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-10-14 18:10:09,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-14 18:10:09,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-14 18:10:09,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=667, Invalid=3365, Unknown=0, NotChecked=0, Total=4032 [2018-10-14 18:10:09,752 INFO L87 Difference]: Start difference. First operand 328 states and 328 transitions. Second operand 64 states. [2018-10-14 18:10:12,562 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-14 18:10:13,163 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:10:14,236 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:10:16,667 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:10:21,558 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:10:23,696 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:10:27,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:10:27,661 INFO L93 Difference]: Finished difference Result 350 states and 350 transitions. [2018-10-14 18:10:27,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-10-14 18:10:27,661 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 327 [2018-10-14 18:10:27,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:10:27,662 INFO L225 Difference]: With dead ends: 350 [2018-10-14 18:10:27,662 INFO L226 Difference]: Without dead ends: 350 [2018-10-14 18:10:27,664 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 18:10:27,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2018-10-14 18:10:27,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 340. [2018-10-14 18:10:27,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-10-14 18:10:27,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 340 transitions. [2018-10-14 18:10:27,668 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 340 transitions. Word has length 327 [2018-10-14 18:10:27,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:10:27,669 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 340 transitions. [2018-10-14 18:10:27,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-14 18:10:27,669 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 340 transitions. [2018-10-14 18:10:27,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-10-14 18:10:27,670 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:10:27,671 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 18:10:27,671 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:10:27,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:10:27,671 INFO L82 PathProgramCache]: Analyzing trace with hash 727519831, now seen corresponding path program 24 times [2018-10-14 18:10:27,672 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:10:27,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:10:30,379 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 18:10:30,380 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:10:30,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-10-14 18:10:30,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-14 18:10:30,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-14 18:10:30,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=3859, Unknown=0, NotChecked=0, Total=4290 [2018-10-14 18:10:30,381 INFO L87 Difference]: Start difference. First operand 340 states and 340 transitions. Second operand 66 states. [2018-10-14 18:10:34,395 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-14 18:10:34,568 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2018-10-14 18:10:35,148 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2018-10-14 18:10:35,338 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 49 [2018-10-14 18:10:35,967 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 49 [2018-10-14 18:10:36,164 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 49 [2018-10-14 18:10:36,762 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 49 [2018-10-14 18:10:37,009 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 49 [2018-10-14 18:10:37,638 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 49 [2018-10-14 18:10:37,860 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 49 [2018-10-14 18:10:38,219 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 49 [2018-10-14 18:10:38,534 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 56 [2018-10-14 18:10:38,791 WARN L179 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 18:10:38,972 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 18:10:39,193 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 18:10:39,442 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 18:10:39,685 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 18:10:39,867 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 18:10:40,057 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 18:10:40,313 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 18:10:40,563 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 18:10:40,755 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 18:10:40,946 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 18:10:41,208 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 18:10:41,477 WARN L179 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 18:10:41,663 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 18:10:41,878 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 18:10:42,181 WARN L179 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 18:10:42,466 WARN L179 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 18:10:42,656 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 18:10:42,853 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 18:10:43,124 WARN L179 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 18:10:43,402 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 18:10:43,607 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 18:10:43,812 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 18:10:44,096 WARN L179 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 18:10:44,397 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 18:10:44,606 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 18:10:44,820 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 18:10:45,110 WARN L179 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 18:10:45,415 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 58 [2018-10-14 18:10:45,628 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2018-10-14 18:10:45,836 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2018-10-14 18:10:46,125 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 57 [2018-10-14 18:10:46,425 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 58 [2018-10-14 18:10:46,631 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2018-10-14 18:10:46,935 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 57 [2018-10-14 18:10:47,276 WARN L179 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 58 [2018-10-14 18:10:47,517 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 50 [2018-10-14 18:10:47,811 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 57 [2018-10-14 18:10:48,080 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2018-10-14 18:10:48,579 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2018-10-14 18:10:48,828 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2018-10-14 18:10:49,271 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2018-10-14 18:10:49,506 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2018-10-14 18:10:49,948 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2018-10-14 18:10:50,188 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2018-10-14 18:10:51,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:10:51,825 INFO L93 Difference]: Finished difference Result 362 states and 362 transitions. [2018-10-14 18:10:51,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-14 18:10:51,825 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 339 [2018-10-14 18:10:51,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:10:51,827 INFO L225 Difference]: With dead ends: 362 [2018-10-14 18:10:51,827 INFO L226 Difference]: Without dead ends: 362 [2018-10-14 18:10:51,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6491 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=5471, Invalid=23599, Unknown=0, NotChecked=0, Total=29070 [2018-10-14 18:10:51,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2018-10-14 18:10:51,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 352. [2018-10-14 18:10:51,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-10-14 18:10:51,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 352 transitions. [2018-10-14 18:10:51,833 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 352 transitions. Word has length 339 [2018-10-14 18:10:51,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:10:51,833 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 352 transitions. [2018-10-14 18:10:51,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-14 18:10:51,834 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 352 transitions. [2018-10-14 18:10:51,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-10-14 18:10:51,835 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:10:51,836 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 18:10:51,836 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:10:51,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:10:51,836 INFO L82 PathProgramCache]: Analyzing trace with hash 586560575, now seen corresponding path program 25 times [2018-10-14 18:10:51,837 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:10:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:10:54,459 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 18:10:54,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:10:54,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-10-14 18:10:54,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-14 18:10:54,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-14 18:10:54,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=771, Invalid=3785, Unknown=0, NotChecked=0, Total=4556 [2018-10-14 18:10:54,461 INFO L87 Difference]: Start difference. First operand 352 states and 352 transitions. Second operand 68 states. [2018-10-14 18:10:57,344 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-14 18:10:57,519 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:11:02,827 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:11:03,529 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:11:12,857 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:11:14,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:11:14,434 INFO L93 Difference]: Finished difference Result 374 states and 374 transitions. [2018-10-14 18:11:14,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-10-14 18:11:14,435 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 351 [2018-10-14 18:11:14,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:11:14,437 INFO L225 Difference]: With dead ends: 374 [2018-10-14 18:11:14,437 INFO L226 Difference]: Without dead ends: 374 [2018-10-14 18:11:14,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8218 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=8154, Invalid=25886, Unknown=0, NotChecked=0, Total=34040 [2018-10-14 18:11:14,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2018-10-14 18:11:14,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 364. [2018-10-14 18:11:14,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-10-14 18:11:14,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 364 transitions. [2018-10-14 18:11:14,444 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 364 transitions. Word has length 351 [2018-10-14 18:11:14,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:11:14,445 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 364 transitions. [2018-10-14 18:11:14,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-14 18:11:14,445 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 364 transitions. [2018-10-14 18:11:14,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-10-14 18:11:14,447 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:11:14,447 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 18:11:14,447 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:11:14,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:11:14,448 INFO L82 PathProgramCache]: Analyzing trace with hash -2019313113, now seen corresponding path program 26 times [2018-10-14 18:11:14,448 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:11:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:11:17,067 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 18:11:17,067 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:11:17,067 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-10-14 18:11:17,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-14 18:11:17,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-14 18:11:17,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=775, Invalid=4055, Unknown=0, NotChecked=0, Total=4830 [2018-10-14 18:11:17,068 INFO L87 Difference]: Start difference. First operand 364 states and 364 transitions. Second operand 70 states. [2018-10-14 18:11:20,154 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:20,704 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:21,280 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:21,866 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:22,023 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:22,473 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:23,195 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:23,844 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:24,681 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:25,183 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:25,885 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:26,081 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:26,606 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:27,335 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:28,154 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:28,413 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:28,977 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:29,204 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:29,803 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:30,038 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:30,632 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:30,874 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:31,494 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:31,739 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:32,369 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:32,627 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:33,323 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:34,207 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:11:34,468 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:11:37,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:11:37,332 INFO L93 Difference]: Finished difference Result 386 states and 386 transitions. [2018-10-14 18:11:37,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-10-14 18:11:37,332 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 363 [2018-10-14 18:11:37,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:11:37,334 INFO L225 Difference]: With dead ends: 386 [2018-10-14 18:11:37,335 INFO L226 Difference]: Without dead ends: 386 [2018-10-14 18:11:37,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8540 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=8294, Invalid=27238, Unknown=0, NotChecked=0, Total=35532 [2018-10-14 18:11:37,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2018-10-14 18:11:37,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 376. [2018-10-14 18:11:37,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2018-10-14 18:11:37,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 376 transitions. [2018-10-14 18:11:37,342 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 376 transitions. Word has length 363 [2018-10-14 18:11:37,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:11:37,342 INFO L481 AbstractCegarLoop]: Abstraction has 376 states and 376 transitions. [2018-10-14 18:11:37,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-14 18:11:37,342 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 376 transitions. [2018-10-14 18:11:37,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-10-14 18:11:37,344 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:11:37,344 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 18:11:37,345 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:11:37,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:11:37,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1980783601, now seen corresponding path program 27 times [2018-10-14 18:11:37,346 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:11:37,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:11:40,262 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 18:11:40,263 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:11:40,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-10-14 18:11:40,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-14 18:11:40,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-14 18:11:40,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=883, Invalid=4229, Unknown=0, NotChecked=0, Total=5112 [2018-10-14 18:11:40,264 INFO L87 Difference]: Start difference. First operand 376 states and 376 transitions. Second operand 72 states. [2018-10-14 18:11:43,372 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:11:47,458 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:11:53,592 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-14 18:11:53,850 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:11:57,962 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:11:58,886 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:11:59,829 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:12:02,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:12:02,370 INFO L93 Difference]: Finished difference Result 398 states and 398 transitions. [2018-10-14 18:12:02,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-14 18:12:02,370 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 375 [2018-10-14 18:12:02,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:12:02,372 INFO L225 Difference]: With dead ends: 398 [2018-10-14 18:12:02,372 INFO L226 Difference]: Without dead ends: 398 [2018-10-14 18:12:02,375 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9429 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=9243, Invalid=29369, Unknown=0, NotChecked=0, Total=38612 [2018-10-14 18:12:02,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2018-10-14 18:12:02,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 388. [2018-10-14 18:12:02,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-10-14 18:12:02,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 388 transitions. [2018-10-14 18:12:02,379 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 388 transitions. Word has length 375 [2018-10-14 18:12:02,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:12:02,380 INFO L481 AbstractCegarLoop]: Abstraction has 388 states and 388 transitions. [2018-10-14 18:12:02,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-14 18:12:02,380 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 388 transitions. [2018-10-14 18:12:02,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-10-14 18:12:02,382 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:12:02,382 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 18:12:02,382 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:12:02,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:12:02,383 INFO L82 PathProgramCache]: Analyzing trace with hash -614206985, now seen corresponding path program 28 times [2018-10-14 18:12:02,383 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:12:02,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:12:06,146 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 18:12:06,146 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:12:06,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-10-14 18:12:06,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-14 18:12:06,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-14 18:12:06,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=4619, Unknown=0, NotChecked=0, Total=5402 [2018-10-14 18:12:06,147 INFO L87 Difference]: Start difference. First operand 388 states and 388 transitions. Second operand 74 states. [2018-10-14 18:12:08,982 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2018-10-14 18:12:09,506 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-14 18:12:09,656 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2018-10-14 18:12:10,176 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-14 18:12:10,351 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:10,853 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:11,024 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:11,515 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:11,693 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:12,185 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:12,372 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:12,886 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:13,080 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:13,610 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:13,808 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:14,196 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-14 18:12:14,424 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:14,632 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:15,186 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:15,413 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:16,006 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:16,228 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:16,817 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:17,048 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:17,667 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:17,912 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:18,552 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:18,803 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:19,224 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-14 18:12:19,479 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:19,745 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:20,401 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:20,680 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:21,343 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:21,614 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:22,255 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:22,518 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:23,175 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:23,448 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:24,122 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:24,438 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:25,162 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:25,449 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 18:12:26,141 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 18:12:26,429 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-14 18:12:27,120 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-14 18:12:27,400 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-14 18:12:27,908 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-14 18:12:28,170 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-14 18:12:30,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:12:30,189 INFO L93 Difference]: Finished difference Result 410 states and 410 transitions. [2018-10-14 18:12:30,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-14 18:12:30,189 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 387 [2018-10-14 18:12:30,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:12:30,191 INFO L225 Difference]: With dead ends: 410 [2018-10-14 18:12:30,191 INFO L226 Difference]: Without dead ends: 410 [2018-10-14 18:12:30,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9425 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=8673, Invalid=30729, Unknown=0, NotChecked=0, Total=39402 [2018-10-14 18:12:30,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2018-10-14 18:12:30,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 400. [2018-10-14 18:12:30,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2018-10-14 18:12:30,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 400 transitions. [2018-10-14 18:12:30,198 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 400 transitions. Word has length 387 [2018-10-14 18:12:30,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:12:30,199 INFO L481 AbstractCegarLoop]: Abstraction has 400 states and 400 transitions. [2018-10-14 18:12:30,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-14 18:12:30,199 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 400 transitions. [2018-10-14 18:12:30,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-10-14 18:12:30,201 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:12:30,202 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 18:12:30,202 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:12:30,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:12:30,202 INFO L82 PathProgramCache]: Analyzing trace with hash 780837855, now seen corresponding path program 29 times [2018-10-14 18:12:30,203 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:12:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:12:33,324 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 18:12:33,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:12:33,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-10-14 18:12:33,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-14 18:12:33,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-14 18:12:33,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1003, Invalid=4697, Unknown=0, NotChecked=0, Total=5700 [2018-10-14 18:12:33,326 INFO L87 Difference]: Start difference. First operand 400 states and 400 transitions. Second operand 76 states. [2018-10-14 18:12:39,712 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:12:41,497 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:12:44,913 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:12:45,176 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:12:54,132 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:12:54,427 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:12:55,206 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:12:57,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:12:57,963 INFO L93 Difference]: Finished difference Result 422 states and 422 transitions. [2018-10-14 18:12:57,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-10-14 18:12:57,964 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 399 [2018-10-14 18:12:57,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:12:57,966 INFO L225 Difference]: With dead ends: 422 [2018-10-14 18:12:57,966 INFO L226 Difference]: Without dead ends: 422 [2018-10-14 18:12:57,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10724 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=10400, Invalid=33072, Unknown=0, NotChecked=0, Total=43472 [2018-10-14 18:12:57,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2018-10-14 18:12:57,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 412. [2018-10-14 18:12:57,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-10-14 18:12:57,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 412 transitions. [2018-10-14 18:12:57,973 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 412 transitions. Word has length 399 [2018-10-14 18:12:57,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:12:57,974 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 412 transitions. [2018-10-14 18:12:57,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-14 18:12:57,974 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 412 transitions. [2018-10-14 18:12:57,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-10-14 18:12:57,976 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:12:57,977 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 18:12:57,977 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:12:57,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:12:57,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1225934393, now seen corresponding path program 30 times [2018-10-14 18:12:57,978 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:12:58,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:12:58,553 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-14 18:13:01,931 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 18:13:01,932 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:13:01,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-10-14 18:13:01,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-14 18:13:01,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-14 18:13:01,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1007, Invalid=4999, Unknown=0, NotChecked=0, Total=6006 [2018-10-14 18:13:01,933 INFO L87 Difference]: Start difference. First operand 412 states and 412 transitions. Second operand 78 states. [2018-10-14 18:13:04,836 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:05,337 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:05,527 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:05,999 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:06,157 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:06,626 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:06,789 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:07,258 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:07,426 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:07,913 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:08,092 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:08,591 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:08,766 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:09,267 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:09,451 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:09,964 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:10,156 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:10,578 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-14 18:13:10,781 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:10,980 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:11,526 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:11,729 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:12,291 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:12,506 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:13,070 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:13,831 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:14,832 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:15,414 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:15,695 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:16,345 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:16,576 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:17,199 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:17,443 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:18,065 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:18,931 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:19,200 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:19,854 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:20,871 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:21,169 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:21,847 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:22,127 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:22,826 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:23,118 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 18:13:23,828 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:24,845 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 18:13:25,138 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-14 18:13:25,893 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-14 18:13:27,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:13:27,488 INFO L93 Difference]: Finished difference Result 434 states and 434 transitions. [2018-10-14 18:13:27,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-10-14 18:13:27,488 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 411 [2018-10-14 18:13:27,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:13:27,490 INFO L225 Difference]: With dead ends: 434 [2018-10-14 18:13:27,490 INFO L226 Difference]: Without dead ends: 434 [2018-10-14 18:13:27,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11090 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=10556, Invalid=34600, Unknown=0, NotChecked=0, Total=45156 [2018-10-14 18:13:27,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-10-14 18:13:27,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 424. [2018-10-14 18:13:27,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-10-14 18:13:27,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 424 transitions. [2018-10-14 18:13:27,497 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 424 transitions. Word has length 411 [2018-10-14 18:13:27,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:13:27,498 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 424 transitions. [2018-10-14 18:13:27,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-14 18:13:27,498 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 424 transitions. [2018-10-14 18:13:27,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-10-14 18:13:27,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:13:27,500 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 18:13:27,501 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:13:27,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:13:27,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1458097233, now seen corresponding path program 31 times [2018-10-14 18:13:27,502 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:13:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:13:31,070 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 18:13:31,070 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:13:31,070 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-14 18:13:31,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-14 18:13:31,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-14 18:13:31,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1131, Invalid=5189, Unknown=0, NotChecked=0, Total=6320 [2018-10-14 18:13:31,072 INFO L87 Difference]: Start difference. First operand 424 states and 424 transitions. Second operand 80 states. [2018-10-14 18:13:36,100 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:13:36,289 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:13:37,310 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:13:39,217 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:13:41,103 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-14 18:13:41,334 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:13:42,087 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 18:13:43,050 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:13:46,231 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:13:51,341 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 18:13:57,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:13:57,683 INFO L93 Difference]: Finished difference Result 446 states and 446 transitions. [2018-10-14 18:13:57,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-10-14 18:13:57,684 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 423 [2018-10-14 18:13:57,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:13:57,686 INFO L225 Difference]: With dead ends: 446 [2018-10-14 18:13:57,686 INFO L226 Difference]: Without dead ends: 446 [2018-10-14 18:13:57,687 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 18:13:57,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2018-10-14 18:13:57,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 436. [2018-10-14 18:13:57,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2018-10-14 18:13:57,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 436 transitions. [2018-10-14 18:13:57,692 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 436 transitions. Word has length 423 [2018-10-14 18:13:57,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:13:57,693 INFO L481 AbstractCegarLoop]: Abstraction has 436 states and 436 transitions. [2018-10-14 18:13:57,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-14 18:13:57,693 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 436 transitions. [2018-10-14 18:13:57,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-10-14 18:13:57,695 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:13:57,695 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 18:13:57,696 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:13:57,696 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:13:57,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1164897897, now seen corresponding path program 32 times [2018-10-14 18:13:57,697 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:13:57,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:14:02,595 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 18:14:02,595 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:14:02,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-14 18:14:02,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-14 18:14:02,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-14 18:14:02,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=6090, Unknown=0, NotChecked=0, Total=6320 [2018-10-14 18:14:02,597 INFO L87 Difference]: Start difference. First operand 436 states and 436 transitions. Second operand 80 states.