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/array3_false-valid-deref.i_8.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-093a8c0 [2018-10-14 18:15:38,813 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-14 18:15:38,815 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-14 18:15:38,827 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-14 18:15:38,828 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-14 18:15:38,829 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-14 18:15:38,830 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-14 18:15:38,832 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-14 18:15:38,833 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-14 18:15:38,834 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-14 18:15:38,835 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-14 18:15:38,835 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-14 18:15:38,836 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-14 18:15:38,837 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-14 18:15:38,838 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-14 18:15:38,839 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-14 18:15:38,840 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-14 18:15:38,842 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-14 18:15:38,844 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-14 18:15:38,846 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-14 18:15:38,847 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-14 18:15:38,848 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-14 18:15:38,851 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-14 18:15:38,851 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-14 18:15:38,851 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-14 18:15:38,852 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-14 18:15:38,853 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-14 18:15:38,854 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-14 18:15:38,855 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-14 18:15:38,856 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-14 18:15:38,856 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-14 18:15:38,857 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-14 18:15:38,859 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 18:15:38,869 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-14 18:15:38,869 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-14 18:15:38,870 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-14 18:15:38,870 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-14 18:15:38,871 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-14 18:15:38,871 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-14 18:15:38,872 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-14 18:15:38,872 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-14 18:15:38,872 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-14 18:15:38,872 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-14 18:15:38,872 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-14 18:15:38,873 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-14 18:15:38,873 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-14 18:15:38,874 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-14 18:15:38,874 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-14 18:15:38,934 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-14 18:15:38,953 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-14 18:15:38,957 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-14 18:15:38,959 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-14 18:15:38,960 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-14 18:15:38,962 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/array3_false-valid-deref.i_8.bpl [2018-10-14 18:15:38,963 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/array3_false-valid-deref.i_8.bpl' [2018-10-14 18:15:39,035 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-14 18:15:39,037 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-14 18:15:39,038 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-14 18:15:39,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-14 18:15:39,038 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-14 18:15:39,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array3_false-valid-deref.i_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:15:39" (1/1) ... [2018-10-14 18:15:39,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array3_false-valid-deref.i_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:15:39" (1/1) ... [2018-10-14 18:15:39,082 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array3_false-valid-deref.i_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:15:39" (1/1) ... [2018-10-14 18:15:39,083 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array3_false-valid-deref.i_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:15:39" (1/1) ... [2018-10-14 18:15:39,087 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array3_false-valid-deref.i_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:15:39" (1/1) ... [2018-10-14 18:15:39,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array3_false-valid-deref.i_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:15:39" (1/1) ... [2018-10-14 18:15:39,090 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array3_false-valid-deref.i_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:15:39" (1/1) ... [2018-10-14 18:15:39,094 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-14 18:15:39,100 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-14 18:15:39,100 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-14 18:15:39,101 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-14 18:15:39,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array3_false-valid-deref.i_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:15:39" (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 18:15:39,161 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-14 18:15:39,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-14 18:15:39,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-14 18:15:39,588 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-14 18:15:39,589 INFO L202 PluginConnector]: Adding new model array3_false-valid-deref.i_8.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:15:39 BoogieIcfgContainer [2018-10-14 18:15:39,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-14 18:15:39,590 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2018-10-14 18:15:39,590 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2018-10-14 18:15:39,591 INFO L276 PluginConnector]: IcfgTransformer initialized [2018-10-14 18:15:39,595 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "array3_false-valid-deref.i_8.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:15:39" (1/1) ... [2018-10-14 18:15:39,604 INFO L137 apSepIcfgTransformer]: HeapSepIcfgTransformer: Starting heap partitioning [2018-10-14 18:15:39,605 INFO L138 apSepIcfgTransformer]: To be partitioned heap arrays found [#memory_int] [2018-10-14 18:15:39,650 INFO L191 apSepIcfgTransformer]: Heap separator: starting loc-array-style preprocessing [2018-10-14 18:15:39,711 INFO L219 apSepIcfgTransformer]: finished MemlocArrayUpdater [2018-10-14 18:15:39,731 INFO L282 apSepIcfgTransformer]: finished preprocessing for the equality analysis [2018-10-14 18:15:39,816 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=1) [2018-10-14 18:15:42,506 INFO L315 AbstractInterpreter]: Visited 39 different actions 81 times. Merged at 20 different actions 40 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-10-14 18:15:42,508 INFO L306 apSepIcfgTransformer]: finished equality analysis [2018-10-14 18:15:42,512 INFO L318 apSepIcfgTransformer]: Finished detection of select terms ("array reads") [2018-10-14 18:15:42,540 WARN L152 HeapPartitionManager]: No literal set constraint found for loc-array access (select |v_#locv_ULTIMATE.start_write~int_old_#memory_int_2_1_1| |v_ULTIMATE.start_write~int_#ptr.base_6|) at (assume #memory_int == 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]];) [2018-10-14 18:15:42,543 INFO L232 HeapPartitionManager]: partitioning result: [2018-10-14 18:15:42,544 INFO L237 HeapPartitionManager]: location blocks for array group [#memory_int, ULTIMATE.start_write~int_old_#memory_int] [2018-10-14 18:15:42,544 INFO L246 HeapPartitionManager]: at dimension 1 [2018-10-14 18:15:42,544 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 1 [2018-10-14 18:15:42,545 INFO L248 HeapPartitionManager]: # location blocks :1 [2018-10-14 18:15:42,545 INFO L246 HeapPartitionManager]: at dimension 2 [2018-10-14 18:15:42,546 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 0 [2018-10-14 18:15:42,546 INFO L248 HeapPartitionManager]: # location blocks :0 [2018-10-14 18:15:42,546 INFO L237 HeapPartitionManager]: location blocks for array group [#memory_int, ULTIMATE.start_write~int_old_#memory_int] [2018-10-14 18:15:42,546 INFO L246 HeapPartitionManager]: at dimension 1 [2018-10-14 18:15:42,546 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 1 [2018-10-14 18:15:42,546 INFO L248 HeapPartitionManager]: # location blocks :1 [2018-10-14 18:15:42,547 INFO L246 HeapPartitionManager]: at dimension 2 [2018-10-14 18:15:42,547 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 0 [2018-10-14 18:15:42,547 INFO L248 HeapPartitionManager]: # location blocks :0 [2018-10-14 18:15:42,549 INFO L145 ransitionTransformer]: executing heap partitioning transformation [2018-10-14 18:15:42,564 INFO L202 PluginConnector]: Adding new model array3_false-valid-deref.i_8.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.10 06:15:42 BasicIcfg [2018-10-14 18:15:42,564 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2018-10-14 18:15:42,566 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-14 18:15:42,566 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-14 18:15:42,569 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-14 18:15:42,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array3_false-valid-deref.i_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:15:39" (1/3) ... [2018-10-14 18:15:42,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10aec635 and model type array3_false-valid-deref.i_8.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:15:42, skipping insertion in model container [2018-10-14 18:15:42,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array3_false-valid-deref.i_8.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:15:39" (2/3) ... [2018-10-14 18:15:42,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10aec635 and model type array3_false-valid-deref.i_8.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 06:15:42, skipping insertion in model container [2018-10-14 18:15:42,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array3_false-valid-deref.i_8.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.10 06:15:42" (3/3) ... [2018-10-14 18:15:42,573 INFO L112 eAbstractionObserver]: Analyzing ICFG memPartitionedIcfg [2018-10-14 18:15:42,583 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-10-14 18:15:42,591 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-14 18:15:42,608 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-14 18:15:42,633 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-14 18:15:42,634 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-14 18:15:42,634 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-14 18:15:42,634 INFO L384 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-10-14 18:15:42,634 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-14 18:15:42,635 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-14 18:15:42,635 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-14 18:15:42,635 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-14 18:15:42,635 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-14 18:15:42,648 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2018-10-14 18:15:42,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-14 18:15:42,655 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:15:42,656 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] [2018-10-14 18:15:42,657 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:15:42,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:15:42,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1564735927, now seen corresponding path program 1 times [2018-10-14 18:15:42,726 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:15:42,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:15:42,852 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 18:15:42,855 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-14 18:15:42,855 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-14 18:15:42,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-14 18:15:42,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-14 18:15:42,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-14 18:15:42,875 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2018-10-14 18:15:43,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:15:43,047 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-14 18:15:43,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-14 18:15:43,049 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2018-10-14 18:15:43,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:15:43,060 INFO L225 Difference]: With dead ends: 50 [2018-10-14 18:15:43,060 INFO L226 Difference]: Without dead ends: 50 [2018-10-14 18:15:43,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-14 18:15:43,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-14 18:15:43,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2018-10-14 18:15:43,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-14 18:15:43,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-14 18:15:43,159 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 23 [2018-10-14 18:15:43,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:15:43,159 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-14 18:15:43,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-14 18:15:43,160 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-14 18:15:43,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-14 18:15:43,161 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:15:43,161 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] [2018-10-14 18:15:43,161 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:15:43,162 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:15:43,162 INFO L82 PathProgramCache]: Analyzing trace with hash 793064596, now seen corresponding path program 1 times [2018-10-14 18:15:43,163 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:15:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:15:43,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:15:43,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:15:43,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-10-14 18:15:43,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-14 18:15:43,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-14 18:15:43,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-14 18:15:43,463 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 5 states. [2018-10-14 18:15:43,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:15:43,749 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-14 18:15:43,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-14 18:15:43,750 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2018-10-14 18:15:43,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:15:43,752 INFO L225 Difference]: With dead ends: 64 [2018-10-14 18:15:43,752 INFO L226 Difference]: Without dead ends: 64 [2018-10-14 18:15:43,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-14 18:15:43,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-14 18:15:43,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2018-10-14 18:15:43,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-14 18:15:43,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-14 18:15:43,760 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 37 [2018-10-14 18:15:43,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:15:43,760 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-14 18:15:43,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-14 18:15:43,761 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-14 18:15:43,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-14 18:15:43,762 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:15:43,763 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:15:43,763 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:15:43,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:15:43,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1483604895, now seen corresponding path program 2 times [2018-10-14 18:15:43,765 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:15:43,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:15:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:15:44,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:15:44,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-10-14 18:15:44,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-14 18:15:44,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-14 18:15:44,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-14 18:15:44,097 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 7 states. [2018-10-14 18:15:44,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:15:44,451 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-10-14 18:15:44,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-14 18:15:44,453 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2018-10-14 18:15:44,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:15:44,456 INFO L225 Difference]: With dead ends: 78 [2018-10-14 18:15:44,456 INFO L226 Difference]: Without dead ends: 78 [2018-10-14 18:15:44,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-10-14 18:15:44,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-14 18:15:44,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2018-10-14 18:15:44,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-14 18:15:44,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-14 18:15:44,465 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 51 [2018-10-14 18:15:44,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:15:44,465 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-14 18:15:44,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-14 18:15:44,465 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-14 18:15:44,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-14 18:15:44,467 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:15:44,468 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:15:44,468 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:15:44,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:15:44,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1561451670, now seen corresponding path program 3 times [2018-10-14 18:15:44,469 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:15:44,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:15:44,692 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:15:44,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:15:44,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-10-14 18:15:44,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-14 18:15:44,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-14 18:15:44,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-10-14 18:15:44,694 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 9 states. [2018-10-14 18:15:45,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:15:45,284 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-10-14 18:15:45,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-14 18:15:45,285 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2018-10-14 18:15:45,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:15:45,286 INFO L225 Difference]: With dead ends: 92 [2018-10-14 18:15:45,287 INFO L226 Difference]: Without dead ends: 92 [2018-10-14 18:15:45,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2018-10-14 18:15:45,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-14 18:15:45,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2018-10-14 18:15:45,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-14 18:15:45,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-14 18:15:45,295 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 65 [2018-10-14 18:15:45,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:15:45,295 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-14 18:15:45,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-14 18:15:45,296 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-14 18:15:45,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-14 18:15:45,297 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:15:45,297 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:15:45,298 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:15:45,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:15:45,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1615414261, now seen corresponding path program 4 times [2018-10-14 18:15:45,299 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:15:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:15:45,586 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:15:45,586 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:15:45,587 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-10-14 18:15:45,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-14 18:15:45,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-14 18:15:45,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-10-14 18:15:45,588 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 11 states. [2018-10-14 18:15:45,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:15:45,823 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-10-14 18:15:45,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-14 18:15:45,824 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2018-10-14 18:15:45,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:15:45,825 INFO L225 Difference]: With dead ends: 106 [2018-10-14 18:15:45,825 INFO L226 Difference]: Without dead ends: 106 [2018-10-14 18:15:45,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2018-10-14 18:15:45,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-14 18:15:45,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2018-10-14 18:15:45,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-14 18:15:45,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-14 18:15:45,834 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 79 [2018-10-14 18:15:45,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:15:45,834 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-14 18:15:45,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-14 18:15:45,834 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-14 18:15:45,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-14 18:15:45,836 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:15:45,836 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:15:45,836 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:15:45,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:15:45,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1506743616, now seen corresponding path program 5 times [2018-10-14 18:15:45,838 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:15:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:15:46,213 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 18:15:46,213 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:15:46,214 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-10-14 18:15:46,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-14 18:15:46,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-14 18:15:46,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2018-10-14 18:15:46,215 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 13 states. [2018-10-14 18:15:46,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:15:46,518 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2018-10-14 18:15:46,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-14 18:15:46,519 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 93 [2018-10-14 18:15:46,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:15:46,520 INFO L225 Difference]: With dead ends: 120 [2018-10-14 18:15:46,520 INFO L226 Difference]: Without dead ends: 120 [2018-10-14 18:15:46,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2018-10-14 18:15:46,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-14 18:15:46,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 108. [2018-10-14 18:15:46,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-14 18:15:46,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-14 18:15:46,529 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 93 [2018-10-14 18:15:46,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:15:46,529 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-14 18:15:46,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-14 18:15:46,530 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-14 18:15:46,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-14 18:15:46,531 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:15:46,531 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:15:46,532 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:15:46,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:15:46,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1000032075, now seen corresponding path program 6 times [2018-10-14 18:15:46,533 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:15:46,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:15:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:15:46,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:15:46,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-10-14 18:15:46,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-14 18:15:46,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-14 18:15:46,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-10-14 18:15:46,754 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 15 states. [2018-10-14 18:15:47,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:15:47,088 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-10-14 18:15:47,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-14 18:15:47,088 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 107 [2018-10-14 18:15:47,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:15:47,089 INFO L225 Difference]: With dead ends: 134 [2018-10-14 18:15:47,090 INFO L226 Difference]: Without dead ends: 134 [2018-10-14 18:15:47,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2018-10-14 18:15:47,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-14 18:15:47,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 122. [2018-10-14 18:15:47,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-14 18:15:47,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-10-14 18:15:47,098 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 107 [2018-10-14 18:15:47,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:15:47,099 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-10-14 18:15:47,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-14 18:15:47,099 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-10-14 18:15:47,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-14 18:15:47,101 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:15:47,101 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:15:47,101 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:15:47,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:15:47,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1080718826, now seen corresponding path program 7 times [2018-10-14 18:15:47,103 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:15:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:15:47,333 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:15:47,333 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:15:47,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-14 18:15:47,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-14 18:15:47,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-14 18:15:47,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2018-10-14 18:15:47,335 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 17 states. [2018-10-14 18:15:47,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:15:47,784 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-10-14 18:15:47,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-14 18:15:47,784 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 121 [2018-10-14 18:15:47,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:15:47,786 INFO L225 Difference]: With dead ends: 148 [2018-10-14 18:15:47,786 INFO L226 Difference]: Without dead ends: 148 [2018-10-14 18:15:47,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2018-10-14 18:15:47,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-10-14 18:15:47,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 136. [2018-10-14 18:15:47,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-14 18:15:47,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-10-14 18:15:47,796 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 121 [2018-10-14 18:15:47,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:15:47,797 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-10-14 18:15:47,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-14 18:15:47,797 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-10-14 18:15:47,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-14 18:15:47,799 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:15:47,799 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:15:47,800 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:15:47,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:15:47,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1737388639, now seen corresponding path program 8 times [2018-10-14 18:15:47,801 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:15:47,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:15:48,455 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:15:48,456 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:15:48,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-10-14 18:15:48,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-14 18:15:48,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-14 18:15:48,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2018-10-14 18:15:48,457 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 19 states. [2018-10-14 18:15:49,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:15:49,067 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2018-10-14 18:15:49,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-14 18:15:49,067 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 135 [2018-10-14 18:15:49,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:15:49,068 INFO L225 Difference]: With dead ends: 162 [2018-10-14 18:15:49,069 INFO L226 Difference]: Without dead ends: 162 [2018-10-14 18:15:49,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2018-10-14 18:15:49,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-14 18:15:49,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 150. [2018-10-14 18:15:49,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-14 18:15:49,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-10-14 18:15:49,076 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 135 [2018-10-14 18:15:49,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:15:49,077 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-10-14 18:15:49,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-14 18:15:49,077 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-10-14 18:15:49,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-14 18:15:49,079 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:15:49,079 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:15:49,079 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:15:49,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:15:49,080 INFO L82 PathProgramCache]: Analyzing trace with hash 481231340, now seen corresponding path program 9 times [2018-10-14 18:15:49,080 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:15:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:15:49,476 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:15:49,476 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:15:49,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-10-14 18:15:49,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-14 18:15:49,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-14 18:15:49,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2018-10-14 18:15:49,478 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 21 states. [2018-10-14 18:15:49,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:15:49,986 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2018-10-14 18:15:49,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-14 18:15:49,987 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 149 [2018-10-14 18:15:49,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:15:49,989 INFO L225 Difference]: With dead ends: 176 [2018-10-14 18:15:49,989 INFO L226 Difference]: Without dead ends: 176 [2018-10-14 18:15:49,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=984, Unknown=0, NotChecked=0, Total=1482 [2018-10-14 18:15:49,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-10-14 18:15:49,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 164. [2018-10-14 18:15:49,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-14 18:15:49,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-10-14 18:15:49,997 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 149 [2018-10-14 18:15:49,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:15:49,997 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-10-14 18:15:49,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-14 18:15:49,998 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-10-14 18:15:50,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-14 18:15:50,000 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:15:50,001 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:15:50,001 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:15:50,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:15:50,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1315334409, now seen corresponding path program 10 times [2018-10-14 18:15:50,002 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:15:50,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:15:50,414 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:15:50,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:15:50,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-10-14 18:15:50,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-14 18:15:50,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-14 18:15:50,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2018-10-14 18:15:50,416 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 23 states. [2018-10-14 18:15:50,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:15:50,995 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2018-10-14 18:15:50,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-14 18:15:50,995 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 163 [2018-10-14 18:15:50,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:15:50,997 INFO L225 Difference]: With dead ends: 190 [2018-10-14 18:15:50,997 INFO L226 Difference]: Without dead ends: 190 [2018-10-14 18:15:50,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=603, Invalid=1203, Unknown=0, NotChecked=0, Total=1806 [2018-10-14 18:15:50,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-10-14 18:15:51,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 178. [2018-10-14 18:15:51,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-10-14 18:15:51,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2018-10-14 18:15:51,003 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 163 [2018-10-14 18:15:51,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:15:51,003 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2018-10-14 18:15:51,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-14 18:15:51,004 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2018-10-14 18:15:51,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-14 18:15:51,005 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:15:51,005 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:15:51,005 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:15:51,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:15:51,006 INFO L82 PathProgramCache]: Analyzing trace with hash -162988862, now seen corresponding path program 11 times [2018-10-14 18:15:51,007 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:15:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:15:51,440 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 0 proven. 781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:15:51,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:15:51,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-10-14 18:15:51,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-14 18:15:51,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-14 18:15:51,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2018-10-14 18:15:51,442 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand 25 states. [2018-10-14 18:15:52,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:15:52,066 INFO L93 Difference]: Finished difference Result 204 states and 204 transitions. [2018-10-14 18:15:52,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-14 18:15:52,067 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 177 [2018-10-14 18:15:52,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:15:52,069 INFO L225 Difference]: With dead ends: 204 [2018-10-14 18:15:52,069 INFO L226 Difference]: Without dead ends: 204 [2018-10-14 18:15:52,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=718, Invalid=1444, Unknown=0, NotChecked=0, Total=2162 [2018-10-14 18:15:52,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-10-14 18:15:52,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 192. [2018-10-14 18:15:52,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-10-14 18:15:52,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2018-10-14 18:15:52,075 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 177 [2018-10-14 18:15:52,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:15:52,076 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2018-10-14 18:15:52,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-14 18:15:52,076 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2018-10-14 18:15:52,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-10-14 18:15:52,077 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:15:52,077 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:15:52,077 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:15:52,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:15:52,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1365187763, now seen corresponding path program 12 times [2018-10-14 18:15:52,079 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:15:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:15:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 0 proven. 936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:15:52,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:15:52,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-10-14 18:15:52,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-14 18:15:52,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-14 18:15:52,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2018-10-14 18:15:52,487 INFO L87 Difference]: Start difference. First operand 192 states and 192 transitions. Second operand 27 states. [2018-10-14 18:15:53,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:15:53,194 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2018-10-14 18:15:53,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-14 18:15:53,195 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 191 [2018-10-14 18:15:53,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:15:53,197 INFO L225 Difference]: With dead ends: 218 [2018-10-14 18:15:53,197 INFO L226 Difference]: Without dead ends: 218 [2018-10-14 18:15:53,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=843, Invalid=1707, Unknown=0, NotChecked=0, Total=2550 [2018-10-14 18:15:53,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-10-14 18:15:53,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 206. [2018-10-14 18:15:53,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-10-14 18:15:53,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 206 transitions. [2018-10-14 18:15:53,202 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 206 transitions. Word has length 191 [2018-10-14 18:15:53,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:15:53,203 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 206 transitions. [2018-10-14 18:15:53,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-14 18:15:53,203 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 206 transitions. [2018-10-14 18:15:53,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-10-14 18:15:53,204 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:15:53,204 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:15:53,205 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:15:53,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:15:53,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1850800792, now seen corresponding path program 13 times [2018-10-14 18:15:53,206 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:15:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:15:54,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:15:54,358 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:15:54,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-10-14 18:15:54,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-14 18:15:54,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-14 18:15:54,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2018-10-14 18:15:54,359 INFO L87 Difference]: Start difference. First operand 206 states and 206 transitions. Second operand 29 states. [2018-10-14 18:15:55,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:15:55,284 INFO L93 Difference]: Finished difference Result 232 states and 232 transitions. [2018-10-14 18:15:55,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-14 18:15:55,285 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 205 [2018-10-14 18:15:55,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:15:55,286 INFO L225 Difference]: With dead ends: 232 [2018-10-14 18:15:55,286 INFO L226 Difference]: Without dead ends: 232 [2018-10-14 18:15:55,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=978, Invalid=1992, Unknown=0, NotChecked=0, Total=2970 [2018-10-14 18:15:55,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2018-10-14 18:15:55,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 220. [2018-10-14 18:15:55,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-14 18:15:55,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 220 transitions. [2018-10-14 18:15:55,291 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 220 transitions. Word has length 205 [2018-10-14 18:15:55,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:15:55,292 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 220 transitions. [2018-10-14 18:15:55,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-14 18:15:55,292 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 220 transitions. [2018-10-14 18:15:55,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-14 18:15:55,293 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:15:55,294 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:15:55,294 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:15:55,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:15:55,294 INFO L82 PathProgramCache]: Analyzing trace with hash 64287395, now seen corresponding path program 14 times [2018-10-14 18:15:55,295 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:15:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:15:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:15:55,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:15:55,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-10-14 18:15:55,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-14 18:15:55,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-14 18:15:55,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2018-10-14 18:15:55,769 INFO L87 Difference]: Start difference. First operand 220 states and 220 transitions. Second operand 31 states. [2018-10-14 18:15:56,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:15:56,458 INFO L93 Difference]: Finished difference Result 246 states and 246 transitions. [2018-10-14 18:15:56,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-14 18:15:56,458 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 219 [2018-10-14 18:15:56,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:15:56,460 INFO L225 Difference]: With dead ends: 246 [2018-10-14 18:15:56,460 INFO L226 Difference]: Without dead ends: 246 [2018-10-14 18:15:56,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1123, Invalid=2299, Unknown=0, NotChecked=0, Total=3422 [2018-10-14 18:15:56,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-10-14 18:15:56,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 234. [2018-10-14 18:15:56,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-10-14 18:15:56,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 234 transitions. [2018-10-14 18:15:56,467 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 234 transitions. Word has length 219 [2018-10-14 18:15:56,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:15:56,468 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 234 transitions. [2018-10-14 18:15:56,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-14 18:15:56,468 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 234 transitions. [2018-10-14 18:15:56,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-10-14 18:15:56,469 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:15:56,469 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:15:56,470 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:15:56,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:15:56,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1552647314, now seen corresponding path program 15 times [2018-10-14 18:15:56,471 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:15:56,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:15:57,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:15:57,042 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:15:57,042 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-10-14 18:15:57,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-14 18:15:57,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-14 18:15:57,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2018-10-14 18:15:57,044 INFO L87 Difference]: Start difference. First operand 234 states and 234 transitions. Second operand 33 states. [2018-10-14 18:15:57,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:15:57,773 INFO L93 Difference]: Finished difference Result 260 states and 260 transitions. [2018-10-14 18:15:57,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-14 18:15:57,774 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 233 [2018-10-14 18:15:57,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:15:57,776 INFO L225 Difference]: With dead ends: 260 [2018-10-14 18:15:57,776 INFO L226 Difference]: Without dead ends: 260 [2018-10-14 18:15:57,777 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1278, Invalid=2628, Unknown=0, NotChecked=0, Total=3906 [2018-10-14 18:15:57,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2018-10-14 18:15:57,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 248. [2018-10-14 18:15:57,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2018-10-14 18:15:57,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 248 transitions. [2018-10-14 18:15:57,782 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 248 transitions. Word has length 233 [2018-10-14 18:15:57,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:15:57,782 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 248 transitions. [2018-10-14 18:15:57,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-14 18:15:57,783 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 248 transitions. [2018-10-14 18:15:57,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-10-14 18:15:57,784 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:15:57,784 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:15:57,785 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:15:57,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:15:57,785 INFO L82 PathProgramCache]: Analyzing trace with hash -767343367, now seen corresponding path program 16 times [2018-10-14 18:15:57,786 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:15:57,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:15:58,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1696 backedges. 0 proven. 1696 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:15:58,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:15:58,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-10-14 18:15:58,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-14 18:15:58,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-14 18:15:58,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2018-10-14 18:15:58,330 INFO L87 Difference]: Start difference. First operand 248 states and 248 transitions. Second operand 35 states. [2018-10-14 18:15:59,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:15:59,163 INFO L93 Difference]: Finished difference Result 274 states and 274 transitions. [2018-10-14 18:15:59,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-14 18:15:59,163 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 247 [2018-10-14 18:15:59,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:15:59,166 INFO L225 Difference]: With dead ends: 274 [2018-10-14 18:15:59,166 INFO L226 Difference]: Without dead ends: 274 [2018-10-14 18:15:59,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1443, Invalid=2979, Unknown=0, NotChecked=0, Total=4422 [2018-10-14 18:15:59,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2018-10-14 18:15:59,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 262. [2018-10-14 18:15:59,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2018-10-14 18:15:59,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 262 transitions. [2018-10-14 18:15:59,173 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 262 transitions. Word has length 247 [2018-10-14 18:15:59,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:15:59,174 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 262 transitions. [2018-10-14 18:15:59,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-14 18:15:59,174 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 262 transitions. [2018-10-14 18:15:59,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-10-14 18:15:59,175 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:15:59,176 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:15:59,176 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:15:59,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:15:59,176 INFO L82 PathProgramCache]: Analyzing trace with hash 287375172, now seen corresponding path program 17 times [2018-10-14 18:15:59,177 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:15:59,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:16:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1921 backedges. 0 proven. 1921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:16:00,909 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:16:00,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-10-14 18:16:00,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-14 18:16:00,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-14 18:16:00,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2018-10-14 18:16:00,910 INFO L87 Difference]: Start difference. First operand 262 states and 262 transitions. Second operand 37 states. [2018-10-14 18:16:01,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:16:01,869 INFO L93 Difference]: Finished difference Result 288 states and 288 transitions. [2018-10-14 18:16:01,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-14 18:16:01,869 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 261 [2018-10-14 18:16:01,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:16:01,873 INFO L225 Difference]: With dead ends: 288 [2018-10-14 18:16:01,873 INFO L226 Difference]: Without dead ends: 288 [2018-10-14 18:16:01,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1618, Invalid=3352, Unknown=0, NotChecked=0, Total=4970 [2018-10-14 18:16:01,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2018-10-14 18:16:01,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 276. [2018-10-14 18:16:01,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2018-10-14 18:16:01,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 276 transitions. [2018-10-14 18:16:01,880 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 276 transitions. Word has length 261 [2018-10-14 18:16:01,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:16:01,881 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 276 transitions. [2018-10-14 18:16:01,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-14 18:16:01,881 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 276 transitions. [2018-10-14 18:16:01,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2018-10-14 18:16:01,883 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:16:01,883 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:16:01,883 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:16:01,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:16:01,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1203329615, now seen corresponding path program 18 times [2018-10-14 18:16:01,884 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:16:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:16:02,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 0 proven. 2160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:16:02,561 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:16:02,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-10-14 18:16:02,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-14 18:16:02,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-14 18:16:02,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2018-10-14 18:16:02,562 INFO L87 Difference]: Start difference. First operand 276 states and 276 transitions. Second operand 39 states. [2018-10-14 18:16:03,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:16:03,542 INFO L93 Difference]: Finished difference Result 302 states and 302 transitions. [2018-10-14 18:16:03,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-14 18:16:03,542 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 275 [2018-10-14 18:16:03,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:16:03,545 INFO L225 Difference]: With dead ends: 302 [2018-10-14 18:16:03,545 INFO L226 Difference]: Without dead ends: 302 [2018-10-14 18:16:03,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1803, Invalid=3747, Unknown=0, NotChecked=0, Total=5550 [2018-10-14 18:16:03,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2018-10-14 18:16:03,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 290. [2018-10-14 18:16:03,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-10-14 18:16:03,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 290 transitions. [2018-10-14 18:16:03,553 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 290 transitions. Word has length 275 [2018-10-14 18:16:03,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:16:03,554 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 290 transitions. [2018-10-14 18:16:03,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-14 18:16:03,554 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 290 transitions. [2018-10-14 18:16:03,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2018-10-14 18:16:03,555 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:16:03,556 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:16:03,556 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:16:03,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:16:03,556 INFO L82 PathProgramCache]: Analyzing trace with hash -276560358, now seen corresponding path program 19 times [2018-10-14 18:16:03,557 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:16:03,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:16:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2413 backedges. 0 proven. 2413 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:16:04,917 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:16:04,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-10-14 18:16:04,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-14 18:16:04,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-14 18:16:04,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2018-10-14 18:16:04,919 INFO L87 Difference]: Start difference. First operand 290 states and 290 transitions. Second operand 41 states. [2018-10-14 18:16:06,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:16:06,344 INFO L93 Difference]: Finished difference Result 316 states and 316 transitions. [2018-10-14 18:16:06,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-14 18:16:06,345 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 289 [2018-10-14 18:16:06,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:16:06,348 INFO L225 Difference]: With dead ends: 316 [2018-10-14 18:16:06,348 INFO L226 Difference]: Without dead ends: 316 [2018-10-14 18:16:06,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1998, Invalid=4164, Unknown=0, NotChecked=0, Total=6162 [2018-10-14 18:16:06,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2018-10-14 18:16:06,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 304. [2018-10-14 18:16:06,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-10-14 18:16:06,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 304 transitions. [2018-10-14 18:16:06,356 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 304 transitions. Word has length 289 [2018-10-14 18:16:06,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:16:06,357 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 304 transitions. [2018-10-14 18:16:06,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-14 18:16:06,357 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 304 transitions. [2018-10-14 18:16:06,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-10-14 18:16:06,359 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:16:06,359 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:16:06,360 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:16:06,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:16:06,360 INFO L82 PathProgramCache]: Analyzing trace with hash -20663643, now seen corresponding path program 20 times [2018-10-14 18:16:06,361 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:16:06,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:16:13,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2680 backedges. 0 proven. 2680 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:16:13,300 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:16:13,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-10-14 18:16:13,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-14 18:16:13,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-14 18:16:13,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2018-10-14 18:16:13,303 INFO L87 Difference]: Start difference. First operand 304 states and 304 transitions. Second operand 43 states. [2018-10-14 18:16:14,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:16:14,613 INFO L93 Difference]: Finished difference Result 330 states and 330 transitions. [2018-10-14 18:16:14,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-14 18:16:14,614 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 303 [2018-10-14 18:16:14,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:16:14,617 INFO L225 Difference]: With dead ends: 330 [2018-10-14 18:16:14,617 INFO L226 Difference]: Without dead ends: 330 [2018-10-14 18:16:14,621 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=2203, Invalid=4603, Unknown=0, NotChecked=0, Total=6806 [2018-10-14 18:16:14,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2018-10-14 18:16:14,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 318. [2018-10-14 18:16:14,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2018-10-14 18:16:14,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 318 transitions. [2018-10-14 18:16:14,628 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 318 transitions. Word has length 303 [2018-10-14 18:16:14,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:16:14,630 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 318 transitions. [2018-10-14 18:16:14,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-14 18:16:14,631 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 318 transitions. [2018-10-14 18:16:14,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2018-10-14 18:16:14,633 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:16:14,633 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:16:14,633 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:16:14,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:16:14,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1819602960, now seen corresponding path program 21 times [2018-10-14 18:16:14,634 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:16:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:16:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2961 backedges. 0 proven. 2961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:16:15,975 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:16:15,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-10-14 18:16:15,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-14 18:16:15,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-14 18:16:15,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=1452, Unknown=0, NotChecked=0, Total=1980 [2018-10-14 18:16:15,977 INFO L87 Difference]: Start difference. First operand 318 states and 318 transitions. Second operand 45 states. [2018-10-14 18:16:17,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:16:17,317 INFO L93 Difference]: Finished difference Result 344 states and 344 transitions. [2018-10-14 18:16:17,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-14 18:16:17,319 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 317 [2018-10-14 18:16:17,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:16:17,320 INFO L225 Difference]: With dead ends: 344 [2018-10-14 18:16:17,320 INFO L226 Difference]: Without dead ends: 344 [2018-10-14 18:16:17,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2418, Invalid=5064, Unknown=0, NotChecked=0, Total=7482 [2018-10-14 18:16:17,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2018-10-14 18:16:17,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 332. [2018-10-14 18:16:17,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2018-10-14 18:16:17,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 332 transitions. [2018-10-14 18:16:17,327 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 332 transitions. Word has length 317 [2018-10-14 18:16:17,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:16:17,328 INFO L481 AbstractCegarLoop]: Abstraction has 332 states and 332 transitions. [2018-10-14 18:16:17,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-14 18:16:17,328 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 332 transitions. [2018-10-14 18:16:17,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2018-10-14 18:16:17,330 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:16:17,330 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:16:17,330 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:16:17,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:16:17,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1588776443, now seen corresponding path program 22 times [2018-10-14 18:16:17,332 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:16:17,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:16:18,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3256 backedges. 0 proven. 3256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:16:18,600 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:16:18,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-10-14 18:16:18,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-14 18:16:18,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-14 18:16:18,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2018-10-14 18:16:18,601 INFO L87 Difference]: Start difference. First operand 332 states and 332 transitions. Second operand 47 states. [2018-10-14 18:16:20,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:16:20,288 INFO L93 Difference]: Finished difference Result 358 states and 358 transitions. [2018-10-14 18:16:20,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-14 18:16:20,288 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 331 [2018-10-14 18:16:20,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:16:20,292 INFO L225 Difference]: With dead ends: 358 [2018-10-14 18:16:20,292 INFO L226 Difference]: Without dead ends: 358 [2018-10-14 18:16:20,293 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1408 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2643, Invalid=5547, Unknown=0, NotChecked=0, Total=8190 [2018-10-14 18:16:20,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2018-10-14 18:16:20,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 346. [2018-10-14 18:16:20,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2018-10-14 18:16:20,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 346 transitions. [2018-10-14 18:16:20,298 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 346 transitions. Word has length 331 [2018-10-14 18:16:20,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:16:20,299 INFO L481 AbstractCegarLoop]: Abstraction has 346 states and 346 transitions. [2018-10-14 18:16:20,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-14 18:16:20,299 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 346 transitions. [2018-10-14 18:16:20,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2018-10-14 18:16:20,301 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:16:20,301 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:16:20,301 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:16:20,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:16:20,302 INFO L82 PathProgramCache]: Analyzing trace with hash -823943994, now seen corresponding path program 23 times [2018-10-14 18:16:20,303 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:16:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:16:21,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3565 backedges. 0 proven. 3565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:16:21,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:16:21,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-10-14 18:16:21,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-14 18:16:21,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-14 18:16:21,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2018-10-14 18:16:21,470 INFO L87 Difference]: Start difference. First operand 346 states and 346 transitions. Second operand 49 states. [2018-10-14 18:16:22,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:16:22,905 INFO L93 Difference]: Finished difference Result 372 states and 372 transitions. [2018-10-14 18:16:22,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-14 18:16:22,906 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 345 [2018-10-14 18:16:22,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:16:22,909 INFO L225 Difference]: With dead ends: 372 [2018-10-14 18:16:22,909 INFO L226 Difference]: Without dead ends: 372 [2018-10-14 18:16:22,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2878, Invalid=6052, Unknown=0, NotChecked=0, Total=8930 [2018-10-14 18:16:22,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2018-10-14 18:16:22,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 360. [2018-10-14 18:16:22,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2018-10-14 18:16:22,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 360 transitions. [2018-10-14 18:16:22,915 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 360 transitions. Word has length 345 [2018-10-14 18:16:22,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:16:22,915 INFO L481 AbstractCegarLoop]: Abstraction has 360 states and 360 transitions. [2018-10-14 18:16:22,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-14 18:16:22,916 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 360 transitions. [2018-10-14 18:16:22,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2018-10-14 18:16:22,917 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:16:22,918 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:16:22,918 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:16:22,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:16:22,918 INFO L82 PathProgramCache]: Analyzing trace with hash -74372015, now seen corresponding path program 24 times [2018-10-14 18:16:22,919 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:16:22,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:16:23,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3888 backedges. 0 proven. 3888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:16:23,882 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:16:23,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-10-14 18:16:23,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-14 18:16:23,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-14 18:16:23,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=1875, Unknown=0, NotChecked=0, Total=2550 [2018-10-14 18:16:23,884 INFO L87 Difference]: Start difference. First operand 360 states and 360 transitions. Second operand 51 states. [2018-10-14 18:16:25,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:16:25,781 INFO L93 Difference]: Finished difference Result 386 states and 386 transitions. [2018-10-14 18:16:25,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-14 18:16:25,782 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 359 [2018-10-14 18:16:25,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:16:25,785 INFO L225 Difference]: With dead ends: 386 [2018-10-14 18:16:25,785 INFO L226 Difference]: Without dead ends: 386 [2018-10-14 18:16:25,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3123, Invalid=6579, Unknown=0, NotChecked=0, Total=9702 [2018-10-14 18:16:25,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2018-10-14 18:16:25,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 374. [2018-10-14 18:16:25,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2018-10-14 18:16:25,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 374 transitions. [2018-10-14 18:16:25,793 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 374 transitions. Word has length 359 [2018-10-14 18:16:25,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:16:25,794 INFO L481 AbstractCegarLoop]: Abstraction has 374 states and 374 transitions. [2018-10-14 18:16:25,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-14 18:16:25,794 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 374 transitions. [2018-10-14 18:16:25,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2018-10-14 18:16:25,797 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:16:25,798 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:16:25,798 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:16:25,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:16:25,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1341861020, now seen corresponding path program 25 times [2018-10-14 18:16:25,799 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:16:25,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:16:26,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:16:26,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:16:26,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-10-14 18:16:26,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-14 18:16:26,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-14 18:16:26,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=728, Invalid=2028, Unknown=0, NotChecked=0, Total=2756 [2018-10-14 18:16:26,946 INFO L87 Difference]: Start difference. First operand 374 states and 374 transitions. Second operand 53 states. [2018-10-14 18:16:28,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:16:28,571 INFO L93 Difference]: Finished difference Result 400 states and 400 transitions. [2018-10-14 18:16:28,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-14 18:16:28,572 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 373 [2018-10-14 18:16:28,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:16:28,574 INFO L225 Difference]: With dead ends: 400 [2018-10-14 18:16:28,574 INFO L226 Difference]: Without dead ends: 400 [2018-10-14 18:16:28,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1825 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3378, Invalid=7128, Unknown=0, NotChecked=0, Total=10506 [2018-10-14 18:16:28,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2018-10-14 18:16:28,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 388. [2018-10-14 18:16:28,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-10-14 18:16:28,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 388 transitions. [2018-10-14 18:16:28,581 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 388 transitions. Word has length 373 [2018-10-14 18:16:28,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:16:28,581 INFO L481 AbstractCegarLoop]: Abstraction has 388 states and 388 transitions. [2018-10-14 18:16:28,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-14 18:16:28,582 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 388 transitions. [2018-10-14 18:16:28,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-10-14 18:16:28,584 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:16:28,584 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:16:28,584 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:16:28,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:16:28,584 INFO L82 PathProgramCache]: Analyzing trace with hash -164803161, now seen corresponding path program 26 times [2018-10-14 18:16:28,585 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:16:28,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:16:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4576 backedges. 0 proven. 4576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:16:29,892 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:16:29,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-10-14 18:16:29,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-14 18:16:29,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-14 18:16:29,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=2187, Unknown=0, NotChecked=0, Total=2970 [2018-10-14 18:16:29,893 INFO L87 Difference]: Start difference. First operand 388 states and 388 transitions. Second operand 55 states. [2018-10-14 18:16:31,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:16:31,858 INFO L93 Difference]: Finished difference Result 414 states and 414 transitions. [2018-10-14 18:16:31,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-14 18:16:31,858 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 387 [2018-10-14 18:16:31,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:16:31,861 INFO L225 Difference]: With dead ends: 414 [2018-10-14 18:16:31,861 INFO L226 Difference]: Without dead ends: 414 [2018-10-14 18:16:31,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1976 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3643, Invalid=7699, Unknown=0, NotChecked=0, Total=11342 [2018-10-14 18:16:31,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2018-10-14 18:16:31,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 402. [2018-10-14 18:16:31,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2018-10-14 18:16:31,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 402 transitions. [2018-10-14 18:16:31,867 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 402 transitions. Word has length 387 [2018-10-14 18:16:31,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:16:31,868 INFO L481 AbstractCegarLoop]: Abstraction has 402 states and 402 transitions. [2018-10-14 18:16:31,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-14 18:16:31,868 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 402 transitions. [2018-10-14 18:16:31,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2018-10-14 18:16:31,870 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:16:31,871 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:16:31,871 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:16:31,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:16:31,871 INFO L82 PathProgramCache]: Analyzing trace with hash 33505138, now seen corresponding path program 27 times [2018-10-14 18:16:31,872 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:16:31,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:16:33,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4941 backedges. 0 proven. 4941 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:16:33,083 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:16:33,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-10-14 18:16:33,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-14 18:16:33,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-14 18:16:33,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2018-10-14 18:16:33,085 INFO L87 Difference]: Start difference. First operand 402 states and 402 transitions. Second operand 57 states. [2018-10-14 18:16:34,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:16:34,890 INFO L93 Difference]: Finished difference Result 428 states and 428 transitions. [2018-10-14 18:16:34,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-14 18:16:34,890 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 401 [2018-10-14 18:16:34,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:16:34,893 INFO L225 Difference]: With dead ends: 428 [2018-10-14 18:16:34,893 INFO L226 Difference]: Without dead ends: 428 [2018-10-14 18:16:34,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2133 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3918, Invalid=8292, Unknown=0, NotChecked=0, Total=12210 [2018-10-14 18:16:34,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2018-10-14 18:16:34,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 416. [2018-10-14 18:16:34,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2018-10-14 18:16:34,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 416 transitions. [2018-10-14 18:16:34,900 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 416 transitions. Word has length 401 [2018-10-14 18:16:34,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:16:34,901 INFO L481 AbstractCegarLoop]: Abstraction has 416 states and 416 transitions. [2018-10-14 18:16:34,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-14 18:16:34,901 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 416 transitions. [2018-10-14 18:16:34,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2018-10-14 18:16:34,903 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:16:34,904 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:16:34,904 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:16:34,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:16:34,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1544860157, now seen corresponding path program 28 times [2018-10-14 18:16:34,905 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:16:34,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:16:36,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5320 backedges. 0 proven. 5320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:16:36,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:16:36,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-10-14 18:16:36,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-14 18:16:36,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-14 18:16:36,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=899, Invalid=2523, Unknown=0, NotChecked=0, Total=3422 [2018-10-14 18:16:36,506 INFO L87 Difference]: Start difference. First operand 416 states and 416 transitions. Second operand 59 states. [2018-10-14 18:16:41,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:16:41,912 INFO L93 Difference]: Finished difference Result 442 states and 442 transitions. [2018-10-14 18:16:41,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-14 18:16:41,913 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 415 [2018-10-14 18:16:41,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:16:41,915 INFO L225 Difference]: With dead ends: 442 [2018-10-14 18:16:41,915 INFO L226 Difference]: Without dead ends: 442 [2018-10-14 18:16:41,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2296 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=4203, Invalid=8907, Unknown=0, NotChecked=0, Total=13110 [2018-10-14 18:16:41,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2018-10-14 18:16:41,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 430. [2018-10-14 18:16:41,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2018-10-14 18:16:41,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 430 transitions. [2018-10-14 18:16:41,924 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 430 transitions. Word has length 415 [2018-10-14 18:16:41,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:16:41,925 INFO L481 AbstractCegarLoop]: Abstraction has 430 states and 430 transitions. [2018-10-14 18:16:41,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-14 18:16:41,925 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 430 transitions. [2018-10-14 18:16:41,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2018-10-14 18:16:41,928 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:16:41,928 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:16:41,928 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:16:41,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:16:41,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1826444616, now seen corresponding path program 29 times [2018-10-14 18:16:41,929 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:16:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:16:43,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5713 backedges. 0 proven. 5713 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:16:43,439 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:16:43,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-10-14 18:16:43,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-14 18:16:43,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-14 18:16:43,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=960, Invalid=2700, Unknown=0, NotChecked=0, Total=3660 [2018-10-14 18:16:43,441 INFO L87 Difference]: Start difference. First operand 430 states and 430 transitions. Second operand 61 states. [2018-10-14 18:16:45,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:16:45,962 INFO L93 Difference]: Finished difference Result 456 states and 456 transitions. [2018-10-14 18:16:45,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-14 18:16:45,963 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 429 [2018-10-14 18:16:45,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:16:45,964 INFO L225 Difference]: With dead ends: 456 [2018-10-14 18:16:45,964 INFO L226 Difference]: Without dead ends: 456 [2018-10-14 18:16:45,966 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2465 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4498, Invalid=9544, Unknown=0, NotChecked=0, Total=14042 [2018-10-14 18:16:45,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2018-10-14 18:16:45,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 444. [2018-10-14 18:16:45,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2018-10-14 18:16:45,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 444 transitions. [2018-10-14 18:16:45,971 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 444 transitions. Word has length 429 [2018-10-14 18:16:45,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:16:45,971 INFO L481 AbstractCegarLoop]: Abstraction has 444 states and 444 transitions. [2018-10-14 18:16:45,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-14 18:16:45,971 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 444 transitions. [2018-10-14 18:16:45,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2018-10-14 18:16:45,974 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:16:45,974 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:16:45,974 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:16:45,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:16:45,975 INFO L82 PathProgramCache]: Analyzing trace with hash -2020288173, now seen corresponding path program 30 times [2018-10-14 18:16:45,975 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:16:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:16:47,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6120 backedges. 0 proven. 6120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:16:47,584 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:16:47,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-10-14 18:16:47,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-14 18:16:47,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-14 18:16:47,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1023, Invalid=2883, Unknown=0, NotChecked=0, Total=3906 [2018-10-14 18:16:47,586 INFO L87 Difference]: Start difference. First operand 444 states and 444 transitions. Second operand 63 states. [2018-10-14 18:16:49,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:16:49,861 INFO L93 Difference]: Finished difference Result 470 states and 470 transitions. [2018-10-14 18:16:49,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-14 18:16:49,862 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 443 [2018-10-14 18:16:49,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:16:49,864 INFO L225 Difference]: With dead ends: 470 [2018-10-14 18:16:49,865 INFO L226 Difference]: Without dead ends: 470 [2018-10-14 18:16:49,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2640 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4803, Invalid=10203, Unknown=0, NotChecked=0, Total=15006 [2018-10-14 18:16:49,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2018-10-14 18:16:49,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 458. [2018-10-14 18:16:49,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2018-10-14 18:16:49,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 458 transitions. [2018-10-14 18:16:49,871 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 458 transitions. Word has length 443 [2018-10-14 18:16:49,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:16:49,872 INFO L481 AbstractCegarLoop]: Abstraction has 458 states and 458 transitions. [2018-10-14 18:16:49,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-14 18:16:49,872 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 458 transitions. [2018-10-14 18:16:49,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2018-10-14 18:16:49,875 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:16:49,875 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:16:49,875 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:16:49,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:16:49,876 INFO L82 PathProgramCache]: Analyzing trace with hash 356707870, now seen corresponding path program 31 times [2018-10-14 18:16:49,876 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:16:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:16:51,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6541 backedges. 0 proven. 6541 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:16:51,811 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:16:51,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-10-14 18:16:51,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-14 18:16:51,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-14 18:16:51,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1088, Invalid=3072, Unknown=0, NotChecked=0, Total=4160 [2018-10-14 18:16:51,813 INFO L87 Difference]: Start difference. First operand 458 states and 458 transitions. Second operand 65 states. [2018-10-14 18:16:54,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:16:54,168 INFO L93 Difference]: Finished difference Result 484 states and 484 transitions. [2018-10-14 18:16:54,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-14 18:16:54,168 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 457 [2018-10-14 18:16:54,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:16:54,170 INFO L225 Difference]: With dead ends: 484 [2018-10-14 18:16:54,170 INFO L226 Difference]: Without dead ends: 484 [2018-10-14 18:16:54,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2821 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5118, Invalid=10884, Unknown=0, NotChecked=0, Total=16002 [2018-10-14 18:16:54,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2018-10-14 18:16:54,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 472. [2018-10-14 18:16:54,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 472 states. [2018-10-14 18:16:54,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 472 transitions. [2018-10-14 18:16:54,176 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 472 transitions. Word has length 457 [2018-10-14 18:16:54,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:16:54,177 INFO L481 AbstractCegarLoop]: Abstraction has 472 states and 472 transitions. [2018-10-14 18:16:54,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-14 18:16:54,177 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 472 transitions. [2018-10-14 18:16:54,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2018-10-14 18:16:54,179 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:16:54,179 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:16:54,179 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:16:54,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:16:54,180 INFO L82 PathProgramCache]: Analyzing trace with hash 2142978985, now seen corresponding path program 32 times [2018-10-14 18:16:54,180 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:16:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:16:56,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6976 backedges. 0 proven. 6976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:16:56,316 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:16:56,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-10-14 18:16:56,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-14 18:16:56,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-14 18:16:56,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=3267, Unknown=0, NotChecked=0, Total=4422 [2018-10-14 18:16:56,319 INFO L87 Difference]: Start difference. First operand 472 states and 472 transitions. Second operand 67 states. [2018-10-14 18:16:58,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:16:58,864 INFO L93 Difference]: Finished difference Result 498 states and 498 transitions. [2018-10-14 18:16:58,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-14 18:16:58,865 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 471 [2018-10-14 18:16:58,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:16:58,868 INFO L225 Difference]: With dead ends: 498 [2018-10-14 18:16:58,868 INFO L226 Difference]: Without dead ends: 498 [2018-10-14 18:16:58,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3008 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5443, Invalid=11587, Unknown=0, NotChecked=0, Total=17030 [2018-10-14 18:16:58,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2018-10-14 18:16:58,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 486. [2018-10-14 18:16:58,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 486 states. [2018-10-14 18:16:58,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 486 transitions. [2018-10-14 18:16:58,874 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 486 transitions. Word has length 471 [2018-10-14 18:16:58,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:16:58,875 INFO L481 AbstractCegarLoop]: Abstraction has 486 states and 486 transitions. [2018-10-14 18:16:58,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-14 18:16:58,875 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 486 transitions. [2018-10-14 18:16:58,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2018-10-14 18:16:58,878 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:16:58,878 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:16:58,878 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:16:58,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:16:58,879 INFO L82 PathProgramCache]: Analyzing trace with hash -593655308, now seen corresponding path program 33 times [2018-10-14 18:16:58,879 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:16:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:17:00,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7425 backedges. 0 proven. 7425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:17:00,573 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:17:00,573 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-10-14 18:17:00,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-14 18:17:00,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-14 18:17:00,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1224, Invalid=3468, Unknown=0, NotChecked=0, Total=4692 [2018-10-14 18:17:00,574 INFO L87 Difference]: Start difference. First operand 486 states and 486 transitions. Second operand 69 states. [2018-10-14 18:17:03,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:17:03,403 INFO L93 Difference]: Finished difference Result 512 states and 512 transitions. [2018-10-14 18:17:03,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-14 18:17:03,404 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 485 [2018-10-14 18:17:03,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:17:03,406 INFO L225 Difference]: With dead ends: 512 [2018-10-14 18:17:03,406 INFO L226 Difference]: Without dead ends: 512 [2018-10-14 18:17:03,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3201 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5778, Invalid=12312, Unknown=0, NotChecked=0, Total=18090 [2018-10-14 18:17:03,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2018-10-14 18:17:03,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 500. [2018-10-14 18:17:03,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2018-10-14 18:17:03,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 500 transitions. [2018-10-14 18:17:03,413 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 500 transitions. Word has length 485 [2018-10-14 18:17:03,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:17:03,414 INFO L481 AbstractCegarLoop]: Abstraction has 500 states and 500 transitions. [2018-10-14 18:17:03,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-14 18:17:03,414 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 500 transitions. [2018-10-14 18:17:03,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2018-10-14 18:17:03,417 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:17:03,417 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:17:03,417 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:17:03,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:17:03,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1481994495, now seen corresponding path program 34 times [2018-10-14 18:17:03,418 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:17:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:17:05,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7888 backedges. 0 proven. 7888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:17:05,431 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:17:05,431 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-10-14 18:17:05,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-14 18:17:05,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-14 18:17:05,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=3675, Unknown=0, NotChecked=0, Total=4970 [2018-10-14 18:17:05,433 INFO L87 Difference]: Start difference. First operand 500 states and 500 transitions. Second operand 71 states. [2018-10-14 18:17:08,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:17:08,408 INFO L93 Difference]: Finished difference Result 526 states and 526 transitions. [2018-10-14 18:17:08,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-14 18:17:08,409 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 499 [2018-10-14 18:17:08,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:17:08,412 INFO L225 Difference]: With dead ends: 526 [2018-10-14 18:17:08,412 INFO L226 Difference]: Without dead ends: 526 [2018-10-14 18:17:08,414 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3400 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6123, Invalid=13059, Unknown=0, NotChecked=0, Total=19182 [2018-10-14 18:17:08,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2018-10-14 18:17:08,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 514. [2018-10-14 18:17:08,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514 states. [2018-10-14 18:17:08,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 514 transitions. [2018-10-14 18:17:08,419 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 514 transitions. Word has length 499 [2018-10-14 18:17:08,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:17:08,420 INFO L481 AbstractCegarLoop]: Abstraction has 514 states and 514 transitions. [2018-10-14 18:17:08,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-14 18:17:08,420 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 514 transitions. [2018-10-14 18:17:08,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2018-10-14 18:17:08,423 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:17:08,423 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:17:08,424 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:17:08,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:17:08,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1629137098, now seen corresponding path program 35 times [2018-10-14 18:17:08,425 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:17:08,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:17:10,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8365 backedges. 0 proven. 8365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:17:10,567 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:17:10,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-10-14 18:17:10,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-14 18:17:10,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-14 18:17:10,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1368, Invalid=3888, Unknown=0, NotChecked=0, Total=5256 [2018-10-14 18:17:10,569 INFO L87 Difference]: Start difference. First operand 514 states and 514 transitions. Second operand 73 states. [2018-10-14 18:17:13,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:17:13,774 INFO L93 Difference]: Finished difference Result 540 states and 540 transitions. [2018-10-14 18:17:13,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-14 18:17:13,774 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 513 [2018-10-14 18:17:13,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:17:13,776 INFO L225 Difference]: With dead ends: 540 [2018-10-14 18:17:13,776 INFO L226 Difference]: Without dead ends: 540 [2018-10-14 18:17:13,777 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3605 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6478, Invalid=13828, Unknown=0, NotChecked=0, Total=20306 [2018-10-14 18:17:13,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2018-10-14 18:17:13,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 528. [2018-10-14 18:17:13,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 528 states. [2018-10-14 18:17:13,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 528 transitions. [2018-10-14 18:17:13,782 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 528 transitions. Word has length 513 [2018-10-14 18:17:13,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:17:13,783 INFO L481 AbstractCegarLoop]: Abstraction has 528 states and 528 transitions. [2018-10-14 18:17:13,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-14 18:17:13,783 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 528 transitions. [2018-10-14 18:17:13,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2018-10-14 18:17:13,786 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:17:13,787 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:17:13,787 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:17:13,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:17:13,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1846484651, now seen corresponding path program 36 times [2018-10-14 18:17:13,788 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:17:13,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:17:15,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8856 backedges. 0 proven. 8856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:17:15,736 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:17:15,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2018-10-14 18:17:15,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-14 18:17:15,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-14 18:17:15,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1443, Invalid=4107, Unknown=0, NotChecked=0, Total=5550 [2018-10-14 18:17:15,738 INFO L87 Difference]: Start difference. First operand 528 states and 528 transitions. Second operand 75 states. [2018-10-14 18:17:19,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:17:19,057 INFO L93 Difference]: Finished difference Result 554 states and 554 transitions. [2018-10-14 18:17:19,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-10-14 18:17:19,058 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 527 [2018-10-14 18:17:19,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:17:19,060 INFO L225 Difference]: With dead ends: 554 [2018-10-14 18:17:19,060 INFO L226 Difference]: Without dead ends: 554 [2018-10-14 18:17:19,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3816 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6843, Invalid=14619, Unknown=0, NotChecked=0, Total=21462 [2018-10-14 18:17:19,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2018-10-14 18:17:19,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 542. [2018-10-14 18:17:19,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 542 states. [2018-10-14 18:17:19,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 542 transitions. [2018-10-14 18:17:19,067 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 542 transitions. Word has length 527 [2018-10-14 18:17:19,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:17:19,067 INFO L481 AbstractCegarLoop]: Abstraction has 542 states and 542 transitions. [2018-10-14 18:17:19,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-14 18:17:19,067 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 542 transitions. [2018-10-14 18:17:19,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2018-10-14 18:17:19,071 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:17:19,071 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 18:17:19,071 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:17:19,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:17:19,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1571277472, now seen corresponding path program 37 times [2018-10-14 18:17:19,072 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:17:19,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:17:21,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9361 backedges. 0 proven. 9361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:17:21,036 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:17:21,036 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2018-10-14 18:17:21,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-14 18:17:21,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-14 18:17:21,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1520, Invalid=4332, Unknown=0, NotChecked=0, Total=5852 [2018-10-14 18:17:21,037 INFO L87 Difference]: Start difference. First operand 542 states and 542 transitions. Second operand 77 states. [2018-10-14 18:17:24,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:17:24,349 INFO L93 Difference]: Finished difference Result 568 states and 568 transitions. [2018-10-14 18:17:24,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-10-14 18:17:24,350 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 541 [2018-10-14 18:17:24,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:17:24,353 INFO L225 Difference]: With dead ends: 568 [2018-10-14 18:17:24,353 INFO L226 Difference]: Without dead ends: 568 [2018-10-14 18:17:24,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4033 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=7218, Invalid=15432, Unknown=0, NotChecked=0, Total=22650 [2018-10-14 18:17:24,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2018-10-14 18:17:24,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 556. [2018-10-14 18:17:24,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2018-10-14 18:17:24,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 556 transitions. [2018-10-14 18:17:24,359 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 556 transitions. Word has length 541 [2018-10-14 18:17:24,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:17:24,359 INFO L481 AbstractCegarLoop]: Abstraction has 556 states and 556 transitions. [2018-10-14 18:17:24,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-14 18:17:24,360 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 556 transitions. [2018-10-14 18:17:24,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2018-10-14 18:17:24,363 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:17:24,364 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 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 18:17:24,364 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:17:24,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:17:24,364 INFO L82 PathProgramCache]: Analyzing trace with hash 2044400811, now seen corresponding path program 38 times [2018-10-14 18:17:24,365 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:17:24,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:17:26,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9880 backedges. 0 proven. 9880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:17:26,465 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:17:26,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2018-10-14 18:17:26,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-14 18:17:26,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-14 18:17:26,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1599, Invalid=4563, Unknown=0, NotChecked=0, Total=6162 [2018-10-14 18:17:26,467 INFO L87 Difference]: Start difference. First operand 556 states and 556 transitions. Second operand 79 states. [2018-10-14 18:17:29,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:17:29,945 INFO L93 Difference]: Finished difference Result 582 states and 582 transitions. [2018-10-14 18:17:29,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-10-14 18:17:29,945 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 555 [2018-10-14 18:17:29,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:17:29,947 INFO L225 Difference]: With dead ends: 582 [2018-10-14 18:17:29,948 INFO L226 Difference]: Without dead ends: 582 [2018-10-14 18:17:29,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4256 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=7603, Invalid=16267, Unknown=0, NotChecked=0, Total=23870 [2018-10-14 18:17:29,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2018-10-14 18:17:29,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 570. [2018-10-14 18:17:29,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 570 states. [2018-10-14 18:17:29,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 570 transitions. [2018-10-14 18:17:29,954 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 570 transitions. Word has length 555 [2018-10-14 18:17:29,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:17:29,954 INFO L481 AbstractCegarLoop]: Abstraction has 570 states and 570 transitions. [2018-10-14 18:17:29,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-14 18:17:29,954 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 570 transitions. [2018-10-14 18:17:29,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2018-10-14 18:17:29,958 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:17:29,958 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 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 18:17:29,959 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:17:29,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:17:29,959 INFO L82 PathProgramCache]: Analyzing trace with hash 166883190, now seen corresponding path program 39 times [2018-10-14 18:17:29,960 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:17:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:17:33,115 INFO L134 CoverageAnalysis]: Checked inductivity of 10413 backedges. 0 proven. 10413 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:17:33,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:17:33,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2018-10-14 18:17:33,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-14 18:17:33,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-14 18:17:33,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1680, Invalid=4800, Unknown=0, NotChecked=0, Total=6480 [2018-10-14 18:17:33,117 INFO L87 Difference]: Start difference. First operand 570 states and 570 transitions. Second operand 81 states. [2018-10-14 18:17:36,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:17:36,762 INFO L93 Difference]: Finished difference Result 596 states and 596 transitions. [2018-10-14 18:17:36,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-10-14 18:17:36,763 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 569 [2018-10-14 18:17:36,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:17:36,765 INFO L225 Difference]: With dead ends: 596 [2018-10-14 18:17:36,765 INFO L226 Difference]: Without dead ends: 596 [2018-10-14 18:17:36,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4485 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=7998, Invalid=17124, Unknown=0, NotChecked=0, Total=25122 [2018-10-14 18:17:36,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2018-10-14 18:17:36,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 584. [2018-10-14 18:17:36,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2018-10-14 18:17:36,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 584 transitions. [2018-10-14 18:17:36,772 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 584 transitions. Word has length 569 [2018-10-14 18:17:36,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:17:36,772 INFO L481 AbstractCegarLoop]: Abstraction has 584 states and 584 transitions. [2018-10-14 18:17:36,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-14 18:17:36,772 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 584 transitions. [2018-10-14 18:17:36,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2018-10-14 18:17:36,787 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:17:36,788 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 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 18:17:36,788 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:17:36,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:17:36,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1977513215, now seen corresponding path program 40 times [2018-10-14 18:17:36,789 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:17:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:17:39,203 INFO L134 CoverageAnalysis]: Checked inductivity of 10960 backedges. 0 proven. 10960 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:17:39,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:17:39,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2018-10-14 18:17:39,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-14 18:17:39,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-14 18:17:39,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1763, Invalid=5043, Unknown=0, NotChecked=0, Total=6806 [2018-10-14 18:17:39,205 INFO L87 Difference]: Start difference. First operand 584 states and 584 transitions. Second operand 83 states. [2018-10-14 18:17:43,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:17:43,199 INFO L93 Difference]: Finished difference Result 610 states and 610 transitions. [2018-10-14 18:17:43,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-10-14 18:17:43,199 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 583 [2018-10-14 18:17:43,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:17:43,202 INFO L225 Difference]: With dead ends: 610 [2018-10-14 18:17:43,202 INFO L226 Difference]: Without dead ends: 610 [2018-10-14 18:17:43,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4720 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8403, Invalid=18003, Unknown=0, NotChecked=0, Total=26406 [2018-10-14 18:17:43,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2018-10-14 18:17:43,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 598. [2018-10-14 18:17:43,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 598 states. [2018-10-14 18:17:43,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 598 transitions. [2018-10-14 18:17:43,207 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 598 transitions. Word has length 583 [2018-10-14 18:17:43,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:17:43,207 INFO L481 AbstractCegarLoop]: Abstraction has 598 states and 598 transitions. [2018-10-14 18:17:43,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-14 18:17:43,207 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 598 transitions. [2018-10-14 18:17:43,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 598 [2018-10-14 18:17:43,211 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:17:43,211 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 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 18:17:43,212 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:17:43,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:17:43,212 INFO L82 PathProgramCache]: Analyzing trace with hash 2053642060, now seen corresponding path program 41 times [2018-10-14 18:17:43,213 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:17:43,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:17:45,513 INFO L134 CoverageAnalysis]: Checked inductivity of 11521 backedges. 0 proven. 11521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:17:45,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:17:45,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2018-10-14 18:17:45,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-14 18:17:45,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-14 18:17:45,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1848, Invalid=5292, Unknown=0, NotChecked=0, Total=7140 [2018-10-14 18:17:45,515 INFO L87 Difference]: Start difference. First operand 598 states and 598 transitions. Second operand 85 states. [2018-10-14 18:17:49,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:17:49,638 INFO L93 Difference]: Finished difference Result 624 states and 624 transitions. [2018-10-14 18:17:49,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-10-14 18:17:49,638 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 597 [2018-10-14 18:17:49,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:17:49,640 INFO L225 Difference]: With dead ends: 624 [2018-10-14 18:17:49,640 INFO L226 Difference]: Without dead ends: 624 [2018-10-14 18:17:49,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4961 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8818, Invalid=18904, Unknown=0, NotChecked=0, Total=27722 [2018-10-14 18:17:49,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2018-10-14 18:17:49,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 612. [2018-10-14 18:17:49,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2018-10-14 18:17:49,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 612 transitions. [2018-10-14 18:17:49,646 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 612 transitions. Word has length 597 [2018-10-14 18:17:49,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:17:49,646 INFO L481 AbstractCegarLoop]: Abstraction has 612 states and 612 transitions. [2018-10-14 18:17:49,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-14 18:17:49,646 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 612 transitions. [2018-10-14 18:17:49,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2018-10-14 18:17:49,651 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:17:49,651 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 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 18:17:49,651 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:17:49,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:17:49,652 INFO L82 PathProgramCache]: Analyzing trace with hash -913193897, now seen corresponding path program 42 times [2018-10-14 18:17:49,652 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:17:49,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:17:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12096 backedges. 0 proven. 12096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:17:52,608 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:17:52,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2018-10-14 18:17:52,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-14 18:17:52,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-14 18:17:52,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1935, Invalid=5547, Unknown=0, NotChecked=0, Total=7482 [2018-10-14 18:17:52,611 INFO L87 Difference]: Start difference. First operand 612 states and 612 transitions. Second operand 87 states. [2018-10-14 18:17:56,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:17:56,680 INFO L93 Difference]: Finished difference Result 638 states and 638 transitions. [2018-10-14 18:17:56,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-10-14 18:17:56,680 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 611 [2018-10-14 18:17:56,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:17:56,682 INFO L225 Difference]: With dead ends: 638 [2018-10-14 18:17:56,682 INFO L226 Difference]: Without dead ends: 638 [2018-10-14 18:17:56,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5208 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=9243, Invalid=19827, Unknown=0, NotChecked=0, Total=29070 [2018-10-14 18:17:56,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2018-10-14 18:17:56,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 626. [2018-10-14 18:17:56,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2018-10-14 18:17:56,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 626 transitions. [2018-10-14 18:17:56,690 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 626 transitions. Word has length 611 [2018-10-14 18:17:56,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:17:56,691 INFO L481 AbstractCegarLoop]: Abstraction has 626 states and 626 transitions. [2018-10-14 18:17:56,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-14 18:17:56,691 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 626 transitions. [2018-10-14 18:17:56,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 626 [2018-10-14 18:17:56,695 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:17:56,695 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 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 18:17:56,695 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:17:56,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:17:56,696 INFO L82 PathProgramCache]: Analyzing trace with hash 3555874, now seen corresponding path program 43 times [2018-10-14 18:17:56,696 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:17:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:17:59,600 INFO L134 CoverageAnalysis]: Checked inductivity of 12685 backedges. 0 proven. 12685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:17:59,600 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:17:59,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2018-10-14 18:17:59,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-14 18:17:59,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-14 18:17:59,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2024, Invalid=5808, Unknown=0, NotChecked=0, Total=7832 [2018-10-14 18:17:59,602 INFO L87 Difference]: Start difference. First operand 626 states and 626 transitions. Second operand 89 states. [2018-10-14 18:18:04,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:18:04,116 INFO L93 Difference]: Finished difference Result 652 states and 652 transitions. [2018-10-14 18:18:04,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-10-14 18:18:04,116 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 625 [2018-10-14 18:18:04,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:18:04,119 INFO L225 Difference]: With dead ends: 652 [2018-10-14 18:18:04,119 INFO L226 Difference]: Without dead ends: 652 [2018-10-14 18:18:04,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5461 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=9678, Invalid=20772, Unknown=0, NotChecked=0, Total=30450 [2018-10-14 18:18:04,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2018-10-14 18:18:04,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 640. [2018-10-14 18:18:04,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 640 states. [2018-10-14 18:18:04,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 640 transitions. [2018-10-14 18:18:04,124 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 640 transitions. Word has length 625 [2018-10-14 18:18:04,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:18:04,125 INFO L481 AbstractCegarLoop]: Abstraction has 640 states and 640 transitions. [2018-10-14 18:18:04,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-14 18:18:04,125 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 640 transitions. [2018-10-14 18:18:04,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2018-10-14 18:18:04,128 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:18:04,128 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 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 18:18:04,128 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:18:04,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:18:04,129 INFO L82 PathProgramCache]: Analyzing trace with hash 733561005, now seen corresponding path program 44 times [2018-10-14 18:18:04,129 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:18:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:18:06,902 INFO L134 CoverageAnalysis]: Checked inductivity of 13288 backedges. 0 proven. 13288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:18:06,902 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:18:06,902 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2018-10-14 18:18:06,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-14 18:18:06,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-14 18:18:06,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2115, Invalid=6075, Unknown=0, NotChecked=0, Total=8190 [2018-10-14 18:18:06,904 INFO L87 Difference]: Start difference. First operand 640 states and 640 transitions. Second operand 91 states. [2018-10-14 18:18:11,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:18:11,622 INFO L93 Difference]: Finished difference Result 666 states and 666 transitions. [2018-10-14 18:18:11,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-10-14 18:18:11,623 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 639 [2018-10-14 18:18:11,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:18:11,626 INFO L225 Difference]: With dead ends: 666 [2018-10-14 18:18:11,626 INFO L226 Difference]: Without dead ends: 666 [2018-10-14 18:18:11,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5720 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=10123, Invalid=21739, Unknown=0, NotChecked=0, Total=31862 [2018-10-14 18:18:11,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2018-10-14 18:18:11,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 654. [2018-10-14 18:18:11,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 654 states. [2018-10-14 18:18:11,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 654 transitions. [2018-10-14 18:18:11,632 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 654 transitions. Word has length 639 [2018-10-14 18:18:11,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:18:11,632 INFO L481 AbstractCegarLoop]: Abstraction has 654 states and 654 transitions. [2018-10-14 18:18:11,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-14 18:18:11,632 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 654 transitions. [2018-10-14 18:18:11,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 654 [2018-10-14 18:18:11,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:18:11,636 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 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 18:18:11,636 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:18:11,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:18:11,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1991610376, now seen corresponding path program 45 times [2018-10-14 18:18:11,636 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:18:11,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:18:14,649 INFO L134 CoverageAnalysis]: Checked inductivity of 13905 backedges. 0 proven. 13905 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:18:14,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:18:14,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2018-10-14 18:18:14,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-14 18:18:14,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-14 18:18:14,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2208, Invalid=6348, Unknown=0, NotChecked=0, Total=8556 [2018-10-14 18:18:14,651 INFO L87 Difference]: Start difference. First operand 654 states and 654 transitions. Second operand 93 states. [2018-10-14 18:18:19,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:18:19,339 INFO L93 Difference]: Finished difference Result 680 states and 680 transitions. [2018-10-14 18:18:19,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-10-14 18:18:19,339 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 653 [2018-10-14 18:18:19,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:18:19,341 INFO L225 Difference]: With dead ends: 680 [2018-10-14 18:18:19,341 INFO L226 Difference]: Without dead ends: 680 [2018-10-14 18:18:19,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5985 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=10578, Invalid=22728, Unknown=0, NotChecked=0, Total=33306 [2018-10-14 18:18:19,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2018-10-14 18:18:19,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 668. [2018-10-14 18:18:19,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 668 states. [2018-10-14 18:18:19,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 668 transitions. [2018-10-14 18:18:19,348 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 668 transitions. Word has length 653 [2018-10-14 18:18:19,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:18:19,348 INFO L481 AbstractCegarLoop]: Abstraction has 668 states and 668 transitions. [2018-10-14 18:18:19,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-14 18:18:19,348 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 668 transitions. [2018-10-14 18:18:19,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 668 [2018-10-14 18:18:19,352 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:18:19,352 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 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 18:18:19,352 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:18:19,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:18:19,353 INFO L82 PathProgramCache]: Analyzing trace with hash -253394941, now seen corresponding path program 46 times [2018-10-14 18:18:19,353 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:18:19,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:18:22,415 INFO L134 CoverageAnalysis]: Checked inductivity of 14536 backedges. 0 proven. 14536 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:18:22,415 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:18:22,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2018-10-14 18:18:22,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-14 18:18:22,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-14 18:18:22,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2303, Invalid=6627, Unknown=0, NotChecked=0, Total=8930 [2018-10-14 18:18:22,417 INFO L87 Difference]: Start difference. First operand 668 states and 668 transitions. Second operand 95 states. [2018-10-14 18:18:27,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:18:27,405 INFO L93 Difference]: Finished difference Result 694 states and 694 transitions. [2018-10-14 18:18:27,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2018-10-14 18:18:27,406 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 667 [2018-10-14 18:18:27,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:18:27,409 INFO L225 Difference]: With dead ends: 694 [2018-10-14 18:18:27,409 INFO L226 Difference]: Without dead ends: 694 [2018-10-14 18:18:27,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6256 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=11043, Invalid=23739, Unknown=0, NotChecked=0, Total=34782 [2018-10-14 18:18:27,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2018-10-14 18:18:27,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 682. [2018-10-14 18:18:27,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2018-10-14 18:18:27,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 682 transitions. [2018-10-14 18:18:27,416 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 682 transitions. Word has length 667 [2018-10-14 18:18:27,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:18:27,416 INFO L481 AbstractCegarLoop]: Abstraction has 682 states and 682 transitions. [2018-10-14 18:18:27,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-14 18:18:27,416 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 682 transitions. [2018-10-14 18:18:27,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 682 [2018-10-14 18:18:27,420 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:18:27,420 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 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 18:18:27,420 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:18:27,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:18:27,420 INFO L82 PathProgramCache]: Analyzing trace with hash 5382350, now seen corresponding path program 47 times [2018-10-14 18:18:27,421 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:18:27,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:18:30,786 INFO L134 CoverageAnalysis]: Checked inductivity of 15181 backedges. 0 proven. 15181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:18:30,787 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:18:30,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2018-10-14 18:18:30,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-14 18:18:30,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-14 18:18:30,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2400, Invalid=6912, Unknown=0, NotChecked=0, Total=9312 [2018-10-14 18:18:30,788 INFO L87 Difference]: Start difference. First operand 682 states and 682 transitions. Second operand 97 states. [2018-10-14 18:18:36,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:18:36,346 INFO L93 Difference]: Finished difference Result 708 states and 708 transitions. [2018-10-14 18:18:36,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-10-14 18:18:36,346 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 681 [2018-10-14 18:18:36,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:18:36,349 INFO L225 Difference]: With dead ends: 708 [2018-10-14 18:18:36,349 INFO L226 Difference]: Without dead ends: 708 [2018-10-14 18:18:36,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6533 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=11518, Invalid=24772, Unknown=0, NotChecked=0, Total=36290 [2018-10-14 18:18:36,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2018-10-14 18:18:36,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 696. [2018-10-14 18:18:36,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 696 states. [2018-10-14 18:18:36,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 696 transitions. [2018-10-14 18:18:36,357 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 696 transitions. Word has length 681 [2018-10-14 18:18:36,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:18:36,357 INFO L481 AbstractCegarLoop]: Abstraction has 696 states and 696 transitions. [2018-10-14 18:18:36,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-14 18:18:36,357 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 696 transitions. [2018-10-14 18:18:36,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 696 [2018-10-14 18:18:36,361 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:18:36,361 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 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 18:18:36,361 INFO L424 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:18:36,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:18:36,362 INFO L82 PathProgramCache]: Analyzing trace with hash 103023193, now seen corresponding path program 48 times [2018-10-14 18:18:36,362 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:18:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:18:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 15840 backedges. 0 proven. 15840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:18:39,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:18:39,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2018-10-14 18:18:39,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-14 18:18:39,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-14 18:18:39,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2499, Invalid=7203, Unknown=0, NotChecked=0, Total=9702 [2018-10-14 18:18:39,889 INFO L87 Difference]: Start difference. First operand 696 states and 696 transitions. Second operand 99 states. [2018-10-14 18:18:45,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:18:45,264 INFO L93 Difference]: Finished difference Result 722 states and 722 transitions. [2018-10-14 18:18:45,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2018-10-14 18:18:45,264 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 695 [2018-10-14 18:18:45,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:18:45,267 INFO L225 Difference]: With dead ends: 722 [2018-10-14 18:18:45,267 INFO L226 Difference]: Without dead ends: 722 [2018-10-14 18:18:45,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6816 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=12003, Invalid=25827, Unknown=0, NotChecked=0, Total=37830 [2018-10-14 18:18:45,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2018-10-14 18:18:45,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 710. [2018-10-14 18:18:45,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 710 states. [2018-10-14 18:18:45,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 710 transitions. [2018-10-14 18:18:45,274 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 710 transitions. Word has length 695 [2018-10-14 18:18:45,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:18:45,274 INFO L481 AbstractCegarLoop]: Abstraction has 710 states and 710 transitions. [2018-10-14 18:18:45,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-14 18:18:45,275 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 710 transitions. [2018-10-14 18:18:45,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 710 [2018-10-14 18:18:45,279 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:18:45,279 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 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 18:18:45,279 INFO L424 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:18:45,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:18:45,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1397042012, now seen corresponding path program 49 times [2018-10-14 18:18:45,280 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:18:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:18:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16513 backedges. 0 proven. 16513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:18:48,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:18:48,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2018-10-14 18:18:48,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-14 18:18:48,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-14 18:18:48,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2600, Invalid=7500, Unknown=0, NotChecked=0, Total=10100 [2018-10-14 18:18:48,528 INFO L87 Difference]: Start difference. First operand 710 states and 710 transitions. Second operand 101 states. [2018-10-14 18:18:54,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:18:54,043 INFO L93 Difference]: Finished difference Result 736 states and 736 transitions. [2018-10-14 18:18:54,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2018-10-14 18:18:54,044 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 709 [2018-10-14 18:18:54,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:18:54,046 INFO L225 Difference]: With dead ends: 736 [2018-10-14 18:18:54,046 INFO L226 Difference]: Without dead ends: 736 [2018-10-14 18:18:54,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7105 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=12498, Invalid=26904, Unknown=0, NotChecked=0, Total=39402 [2018-10-14 18:18:54,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2018-10-14 18:18:54,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 724. [2018-10-14 18:18:54,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 724 states. [2018-10-14 18:18:54,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 724 transitions. [2018-10-14 18:18:54,055 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 724 transitions. Word has length 709 [2018-10-14 18:18:54,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:18:54,056 INFO L481 AbstractCegarLoop]: Abstraction has 724 states and 724 transitions. [2018-10-14 18:18:54,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-14 18:18:54,056 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 724 transitions. [2018-10-14 18:18:54,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2018-10-14 18:18:54,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:18:54,060 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 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 18:18:54,060 INFO L424 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:18:54,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:18:54,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1698842543, now seen corresponding path program 50 times [2018-10-14 18:18:54,061 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:18:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:18:57,487 INFO L134 CoverageAnalysis]: Checked inductivity of 17200 backedges. 0 proven. 17200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:18:57,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:18:57,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103] total 103 [2018-10-14 18:18:57,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-14 18:18:57,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-14 18:18:57,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=7803, Unknown=0, NotChecked=0, Total=10506 [2018-10-14 18:18:57,490 INFO L87 Difference]: Start difference. First operand 724 states and 724 transitions. Second operand 103 states. [2018-10-14 18:19:02,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:19:02,994 INFO L93 Difference]: Finished difference Result 750 states and 750 transitions. [2018-10-14 18:19:02,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2018-10-14 18:19:02,994 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 723 [2018-10-14 18:19:02,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:19:02,998 INFO L225 Difference]: With dead ends: 750 [2018-10-14 18:19:02,998 INFO L226 Difference]: Without dead ends: 750 [2018-10-14 18:19:03,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7400 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=13003, Invalid=28003, Unknown=0, NotChecked=0, Total=41006 [2018-10-14 18:19:03,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2018-10-14 18:19:03,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 738. [2018-10-14 18:19:03,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 738 states. [2018-10-14 18:19:03,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 738 transitions. [2018-10-14 18:19:03,005 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 738 transitions. Word has length 723 [2018-10-14 18:19:03,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:19:03,005 INFO L481 AbstractCegarLoop]: Abstraction has 738 states and 738 transitions. [2018-10-14 18:19:03,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-14 18:19:03,006 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 738 transitions. [2018-10-14 18:19:03,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 738 [2018-10-14 18:19:03,010 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:19:03,010 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 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 18:19:03,010 INFO L424 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:19:03,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:19:03,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1833825414, now seen corresponding path program 51 times [2018-10-14 18:19:03,011 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:19:03,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:19:06,815 INFO L134 CoverageAnalysis]: Checked inductivity of 17901 backedges. 0 proven. 17901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:19:06,815 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:19:06,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105] total 105 [2018-10-14 18:19:06,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-14 18:19:06,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-14 18:19:06,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2808, Invalid=8112, Unknown=0, NotChecked=0, Total=10920 [2018-10-14 18:19:06,817 INFO L87 Difference]: Start difference. First operand 738 states and 738 transitions. Second operand 105 states. [2018-10-14 18:19:12,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:19:12,702 INFO L93 Difference]: Finished difference Result 764 states and 764 transitions. [2018-10-14 18:19:12,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2018-10-14 18:19:12,702 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 737 [2018-10-14 18:19:12,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:19:12,705 INFO L225 Difference]: With dead ends: 764 [2018-10-14 18:19:12,705 INFO L226 Difference]: Without dead ends: 764 [2018-10-14 18:19:12,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7701 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=13518, Invalid=29124, Unknown=0, NotChecked=0, Total=42642 [2018-10-14 18:19:12,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2018-10-14 18:19:12,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 752. [2018-10-14 18:19:12,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 752 states. [2018-10-14 18:19:12,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 752 transitions. [2018-10-14 18:19:12,714 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 752 transitions. Word has length 737 [2018-10-14 18:19:12,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:19:12,714 INFO L481 AbstractCegarLoop]: Abstraction has 752 states and 752 transitions. [2018-10-14 18:19:12,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-14 18:19:12,714 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 752 transitions. [2018-10-14 18:19:12,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 752 [2018-10-14 18:19:12,719 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:19:12,719 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 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 18:19:12,719 INFO L424 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:19:12,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:19:12,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1959645189, now seen corresponding path program 52 times [2018-10-14 18:19:12,720 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:19:12,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:19:17,388 INFO L134 CoverageAnalysis]: Checked inductivity of 18616 backedges. 0 proven. 18616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:19:17,388 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:19:17,388 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107] total 107 [2018-10-14 18:19:17,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-14 18:19:17,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-14 18:19:17,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2915, Invalid=8427, Unknown=0, NotChecked=0, Total=11342 [2018-10-14 18:19:17,390 INFO L87 Difference]: Start difference. First operand 752 states and 752 transitions. Second operand 107 states. [2018-10-14 18:19:23,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:19:23,513 INFO L93 Difference]: Finished difference Result 778 states and 778 transitions. [2018-10-14 18:19:23,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2018-10-14 18:19:23,514 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 751 [2018-10-14 18:19:23,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:19:23,517 INFO L225 Difference]: With dead ends: 778 [2018-10-14 18:19:23,518 INFO L226 Difference]: Without dead ends: 778 [2018-10-14 18:19:23,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8008 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=14043, Invalid=30267, Unknown=0, NotChecked=0, Total=44310 [2018-10-14 18:19:23,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2018-10-14 18:19:23,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 766. [2018-10-14 18:19:23,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 766 states. [2018-10-14 18:19:23,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 766 transitions. [2018-10-14 18:19:23,526 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 766 transitions. Word has length 751 [2018-10-14 18:19:23,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:19:23,526 INFO L481 AbstractCegarLoop]: Abstraction has 766 states and 766 transitions. [2018-10-14 18:19:23,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-14 18:19:23,526 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 766 transitions. [2018-10-14 18:19:23,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 766 [2018-10-14 18:19:23,533 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:19:23,533 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 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 18:19:23,533 INFO L424 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:19:23,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:19:23,534 INFO L82 PathProgramCache]: Analyzing trace with hash -752532144, now seen corresponding path program 53 times [2018-10-14 18:19:23,534 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:19:23,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:19:27,592 INFO L134 CoverageAnalysis]: Checked inductivity of 19345 backedges. 0 proven. 19345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:19:27,592 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:19:27,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109] total 109 [2018-10-14 18:19:27,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-10-14 18:19:27,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-10-14 18:19:27,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3024, Invalid=8748, Unknown=0, NotChecked=0, Total=11772 [2018-10-14 18:19:27,594 INFO L87 Difference]: Start difference. First operand 766 states and 766 transitions. Second operand 109 states. [2018-10-14 18:19:33,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:19:33,978 INFO L93 Difference]: Finished difference Result 792 states and 792 transitions. [2018-10-14 18:19:33,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2018-10-14 18:19:33,978 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 765 [2018-10-14 18:19:33,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:19:33,981 INFO L225 Difference]: With dead ends: 792 [2018-10-14 18:19:33,981 INFO L226 Difference]: Without dead ends: 792 [2018-10-14 18:19:33,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8321 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=14578, Invalid=31432, Unknown=0, NotChecked=0, Total=46010 [2018-10-14 18:19:33,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2018-10-14 18:19:33,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 780. [2018-10-14 18:19:33,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2018-10-14 18:19:33,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 780 transitions. [2018-10-14 18:19:33,989 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 780 transitions. Word has length 765 [2018-10-14 18:19:33,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:19:33,990 INFO L481 AbstractCegarLoop]: Abstraction has 780 states and 780 transitions. [2018-10-14 18:19:33,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-10-14 18:19:33,990 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 780 transitions. [2018-10-14 18:19:33,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 780 [2018-10-14 18:19:33,994 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:19:33,995 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 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 18:19:33,995 INFO L424 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:19:33,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:19:33,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1746148187, now seen corresponding path program 54 times [2018-10-14 18:19:33,996 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:19:34,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:19:38,264 INFO L134 CoverageAnalysis]: Checked inductivity of 20088 backedges. 0 proven. 20088 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:19:38,264 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:19:38,264 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111] total 111 [2018-10-14 18:19:38,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-10-14 18:19:38,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-10-14 18:19:38,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3135, Invalid=9075, Unknown=0, NotChecked=0, Total=12210 [2018-10-14 18:19:38,266 INFO L87 Difference]: Start difference. First operand 780 states and 780 transitions. Second operand 111 states. [2018-10-14 18:19:45,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:19:45,125 INFO L93 Difference]: Finished difference Result 806 states and 806 transitions. [2018-10-14 18:19:45,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2018-10-14 18:19:45,125 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 779 [2018-10-14 18:19:45,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:19:45,128 INFO L225 Difference]: With dead ends: 806 [2018-10-14 18:19:45,128 INFO L226 Difference]: Without dead ends: 806 [2018-10-14 18:19:45,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8640 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=15123, Invalid=32619, Unknown=0, NotChecked=0, Total=47742 [2018-10-14 18:19:45,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2018-10-14 18:19:45,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 794. [2018-10-14 18:19:45,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 794 states. [2018-10-14 18:19:45,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 794 transitions. [2018-10-14 18:19:45,136 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 794 transitions. Word has length 779 [2018-10-14 18:19:45,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:19:45,136 INFO L481 AbstractCegarLoop]: Abstraction has 794 states and 794 transitions. [2018-10-14 18:19:45,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-10-14 18:19:45,136 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 794 transitions. [2018-10-14 18:19:45,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 794 [2018-10-14 18:19:45,140 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:19:45,141 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 55, 55, 55, 55, 55, 55, 55, 55, 55, 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 18:19:45,141 INFO L424 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:19:45,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:19:45,141 INFO L82 PathProgramCache]: Analyzing trace with hash 197263910, now seen corresponding path program 55 times [2018-10-14 18:19:45,142 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:19:45,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:19:49,129 INFO L134 CoverageAnalysis]: Checked inductivity of 20845 backedges. 0 proven. 20845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:19:49,129 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:19:49,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113] total 113 [2018-10-14 18:19:49,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-10-14 18:19:49,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-10-14 18:19:49,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3248, Invalid=9408, Unknown=0, NotChecked=0, Total=12656 [2018-10-14 18:19:49,132 INFO L87 Difference]: Start difference. First operand 794 states and 794 transitions. Second operand 113 states. [2018-10-14 18:19:56,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:19:56,212 INFO L93 Difference]: Finished difference Result 820 states and 820 transitions. [2018-10-14 18:19:56,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2018-10-14 18:19:56,212 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 793 [2018-10-14 18:19:56,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:19:56,216 INFO L225 Difference]: With dead ends: 820 [2018-10-14 18:19:56,216 INFO L226 Difference]: Without dead ends: 820 [2018-10-14 18:19:56,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8965 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=15678, Invalid=33828, Unknown=0, NotChecked=0, Total=49506 [2018-10-14 18:19:56,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2018-10-14 18:19:56,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 808. [2018-10-14 18:19:56,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 808 states. [2018-10-14 18:19:56,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 808 transitions. [2018-10-14 18:19:56,225 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 808 transitions. Word has length 793 [2018-10-14 18:19:56,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:19:56,225 INFO L481 AbstractCegarLoop]: Abstraction has 808 states and 808 transitions. [2018-10-14 18:19:56,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-10-14 18:19:56,225 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 808 transitions. [2018-10-14 18:19:56,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2018-10-14 18:19:56,230 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:19:56,230 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 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 18:19:56,230 INFO L424 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:19:56,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:19:56,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1625118287, now seen corresponding path program 56 times [2018-10-14 18:19:56,231 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:19:56,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:20:00,748 INFO L134 CoverageAnalysis]: Checked inductivity of 21616 backedges. 0 proven. 21616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:20:00,748 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:20:00,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115] total 115 [2018-10-14 18:20:00,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-10-14 18:20:00,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-10-14 18:20:00,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3363, Invalid=9747, Unknown=0, NotChecked=0, Total=13110 [2018-10-14 18:20:00,750 INFO L87 Difference]: Start difference. First operand 808 states and 808 transitions. Second operand 115 states. [2018-10-14 18:20:07,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:20:07,602 INFO L93 Difference]: Finished difference Result 834 states and 834 transitions. [2018-10-14 18:20:07,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2018-10-14 18:20:07,603 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 807 [2018-10-14 18:20:07,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:20:07,607 INFO L225 Difference]: With dead ends: 834 [2018-10-14 18:20:07,607 INFO L226 Difference]: Without dead ends: 834 [2018-10-14 18:20:07,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9296 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=16243, Invalid=35059, Unknown=0, NotChecked=0, Total=51302 [2018-10-14 18:20:07,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2018-10-14 18:20:07,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 822. [2018-10-14 18:20:07,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 822 states. [2018-10-14 18:20:07,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 822 transitions. [2018-10-14 18:20:07,616 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 822 transitions. Word has length 807 [2018-10-14 18:20:07,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:20:07,616 INFO L481 AbstractCegarLoop]: Abstraction has 822 states and 822 transitions. [2018-10-14 18:20:07,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-10-14 18:20:07,616 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 822 transitions. [2018-10-14 18:20:07,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 822 [2018-10-14 18:20:07,621 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:20:07,622 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 57, 57, 57, 57, 57, 57, 57, 57, 57, 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 18:20:07,622 INFO L424 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:20:07,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:20:07,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1225408004, now seen corresponding path program 57 times [2018-10-14 18:20:07,623 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:20:07,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:20:12,132 INFO L134 CoverageAnalysis]: Checked inductivity of 22401 backedges. 0 proven. 22401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:20:12,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:20:12,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117] total 117 [2018-10-14 18:20:12,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-10-14 18:20:12,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-10-14 18:20:12,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3480, Invalid=10092, Unknown=0, NotChecked=0, Total=13572 [2018-10-14 18:20:12,134 INFO L87 Difference]: Start difference. First operand 822 states and 822 transitions. Second operand 117 states. [2018-10-14 18:20:19,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:20:19,470 INFO L93 Difference]: Finished difference Result 848 states and 848 transitions. [2018-10-14 18:20:19,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2018-10-14 18:20:19,470 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 821 [2018-10-14 18:20:19,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:20:19,473 INFO L225 Difference]: With dead ends: 848 [2018-10-14 18:20:19,473 INFO L226 Difference]: Without dead ends: 848 [2018-10-14 18:20:19,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9633 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=16818, Invalid=36312, Unknown=0, NotChecked=0, Total=53130 [2018-10-14 18:20:19,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2018-10-14 18:20:19,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 836. [2018-10-14 18:20:19,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 836 states. [2018-10-14 18:20:19,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 836 transitions. [2018-10-14 18:20:19,481 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 836 transitions. Word has length 821 [2018-10-14 18:20:19,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:20:19,481 INFO L481 AbstractCegarLoop]: Abstraction has 836 states and 836 transitions. [2018-10-14 18:20:19,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-10-14 18:20:19,481 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 836 transitions. [2018-10-14 18:20:19,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 836 [2018-10-14 18:20:19,486 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:20:19,486 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 58, 58, 58, 58, 58, 58, 58, 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 18:20:19,486 INFO L424 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:20:19,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:20:19,487 INFO L82 PathProgramCache]: Analyzing trace with hash 113703687, now seen corresponding path program 58 times [2018-10-14 18:20:19,487 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:20:19,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:20:24,262 INFO L134 CoverageAnalysis]: Checked inductivity of 23200 backedges. 0 proven. 23200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:20:24,263 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:20:24,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119] total 119 [2018-10-14 18:20:24,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-10-14 18:20:24,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-10-14 18:20:24,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3599, Invalid=10443, Unknown=0, NotChecked=0, Total=14042 [2018-10-14 18:20:24,265 INFO L87 Difference]: Start difference. First operand 836 states and 836 transitions. Second operand 119 states. [2018-10-14 18:20:32,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:20:32,016 INFO L93 Difference]: Finished difference Result 862 states and 862 transitions. [2018-10-14 18:20:32,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2018-10-14 18:20:32,016 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 835 [2018-10-14 18:20:32,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:20:32,019 INFO L225 Difference]: With dead ends: 862 [2018-10-14 18:20:32,019 INFO L226 Difference]: Without dead ends: 862 [2018-10-14 18:20:32,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9976 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=17403, Invalid=37587, Unknown=0, NotChecked=0, Total=54990 [2018-10-14 18:20:32,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2018-10-14 18:20:32,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 850. [2018-10-14 18:20:32,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 850 states. [2018-10-14 18:20:32,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 850 transitions. [2018-10-14 18:20:32,028 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 850 transitions. Word has length 835 [2018-10-14 18:20:32,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:20:32,028 INFO L481 AbstractCegarLoop]: Abstraction has 850 states and 850 transitions. [2018-10-14 18:20:32,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-10-14 18:20:32,028 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 850 transitions. [2018-10-14 18:20:32,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 850 [2018-10-14 18:20:32,034 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:20:32,034 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 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 18:20:32,034 INFO L424 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:20:32,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:20:32,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1947335470, now seen corresponding path program 59 times [2018-10-14 18:20:32,035 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:20:32,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:20:36,911 INFO L134 CoverageAnalysis]: Checked inductivity of 24013 backedges. 0 proven. 24013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:20:36,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:20:36,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121] total 121 [2018-10-14 18:20:36,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-10-14 18:20:36,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-10-14 18:20:36,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3720, Invalid=10800, Unknown=0, NotChecked=0, Total=14520 [2018-10-14 18:20:36,913 INFO L87 Difference]: Start difference. First operand 850 states and 850 transitions. Second operand 121 states. [2018-10-14 18:20:44,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:20:44,520 INFO L93 Difference]: Finished difference Result 876 states and 876 transitions. [2018-10-14 18:20:44,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2018-10-14 18:20:44,521 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 849 [2018-10-14 18:20:44,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:20:44,524 INFO L225 Difference]: With dead ends: 876 [2018-10-14 18:20:44,524 INFO L226 Difference]: Without dead ends: 876 [2018-10-14 18:20:44,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10325 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=17998, Invalid=38884, Unknown=0, NotChecked=0, Total=56882 [2018-10-14 18:20:44,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2018-10-14 18:20:44,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 864. [2018-10-14 18:20:44,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 864 states. [2018-10-14 18:20:44,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 864 transitions. [2018-10-14 18:20:44,532 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 864 transitions. Word has length 849 [2018-10-14 18:20:44,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:20:44,533 INFO L481 AbstractCegarLoop]: Abstraction has 864 states and 864 transitions. [2018-10-14 18:20:44,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-10-14 18:20:44,533 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 864 transitions. [2018-10-14 18:20:44,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 864 [2018-10-14 18:20:44,538 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:20:44,538 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 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 18:20:44,539 INFO L424 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:20:44,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:20:44,539 INFO L82 PathProgramCache]: Analyzing trace with hash 2022608733, now seen corresponding path program 60 times [2018-10-14 18:20:44,540 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:20:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:20:49,546 INFO L134 CoverageAnalysis]: Checked inductivity of 24840 backedges. 0 proven. 24840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:20:49,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:20:49,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123] total 123 [2018-10-14 18:20:49,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-10-14 18:20:49,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-10-14 18:20:49,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3843, Invalid=11163, Unknown=0, NotChecked=0, Total=15006 [2018-10-14 18:20:49,549 INFO L87 Difference]: Start difference. First operand 864 states and 864 transitions. Second operand 123 states. [2018-10-14 18:20:57,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:20:57,463 INFO L93 Difference]: Finished difference Result 890 states and 890 transitions. [2018-10-14 18:20:57,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2018-10-14 18:20:57,464 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 863 [2018-10-14 18:20:57,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:20:57,467 INFO L225 Difference]: With dead ends: 890 [2018-10-14 18:20:57,467 INFO L226 Difference]: Without dead ends: 890 [2018-10-14 18:20:57,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10680 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=18603, Invalid=40203, Unknown=0, NotChecked=0, Total=58806 [2018-10-14 18:20:57,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2018-10-14 18:20:57,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 878. [2018-10-14 18:20:57,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 878 states. [2018-10-14 18:20:57,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 878 transitions. [2018-10-14 18:20:57,476 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 878 transitions. Word has length 863 [2018-10-14 18:20:57,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:20:57,477 INFO L481 AbstractCegarLoop]: Abstraction has 878 states and 878 transitions. [2018-10-14 18:20:57,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-10-14 18:20:57,477 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 878 transitions. [2018-10-14 18:20:57,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 878 [2018-10-14 18:20:57,482 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:20:57,482 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 61, 61, 61, 61, 61, 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 18:20:57,482 INFO L424 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:20:57,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:20:57,483 INFO L82 PathProgramCache]: Analyzing trace with hash -560444760, now seen corresponding path program 61 times [2018-10-14 18:20:57,483 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:20:57,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:21:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 25681 backedges. 0 proven. 25681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:21:02,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:21:02,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125] total 125 [2018-10-14 18:21:02,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-10-14 18:21:02,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-10-14 18:21:02,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3968, Invalid=11532, Unknown=0, NotChecked=0, Total=15500 [2018-10-14 18:21:02,592 INFO L87 Difference]: Start difference. First operand 878 states and 878 transitions. Second operand 125 states. [2018-10-14 18:21:10,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:21:10,755 INFO L93 Difference]: Finished difference Result 904 states and 904 transitions. [2018-10-14 18:21:10,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2018-10-14 18:21:10,755 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 877 [2018-10-14 18:21:10,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:21:10,758 INFO L225 Difference]: With dead ends: 904 [2018-10-14 18:21:10,758 INFO L226 Difference]: Without dead ends: 904 [2018-10-14 18:21:10,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11041 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=19218, Invalid=41544, Unknown=0, NotChecked=0, Total=60762 [2018-10-14 18:21:10,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2018-10-14 18:21:10,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 892. [2018-10-14 18:21:10,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 892 states. [2018-10-14 18:21:10,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 892 transitions. [2018-10-14 18:21:10,765 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 892 transitions. Word has length 877 [2018-10-14 18:21:10,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:21:10,766 INFO L481 AbstractCegarLoop]: Abstraction has 892 states and 892 transitions. [2018-10-14 18:21:10,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-10-14 18:21:10,766 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 892 transitions. [2018-10-14 18:21:10,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 892 [2018-10-14 18:21:10,771 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:21:10,772 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 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 18:21:10,772 INFO L424 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:21:10,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:21:10,772 INFO L82 PathProgramCache]: Analyzing trace with hash 449242803, now seen corresponding path program 62 times [2018-10-14 18:21:10,773 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:21:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:21:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 26536 backedges. 0 proven. 26536 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:21:16,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:21:16,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127] total 127 [2018-10-14 18:21:16,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-10-14 18:21:16,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-10-14 18:21:16,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=11907, Unknown=0, NotChecked=0, Total=16002 [2018-10-14 18:21:16,125 INFO L87 Difference]: Start difference. First operand 892 states and 892 transitions. Second operand 127 states. [2018-10-14 18:21:24,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:21:24,817 INFO L93 Difference]: Finished difference Result 918 states and 918 transitions. [2018-10-14 18:21:24,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2018-10-14 18:21:24,817 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 891 [2018-10-14 18:21:24,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:21:24,821 INFO L225 Difference]: With dead ends: 918 [2018-10-14 18:21:24,821 INFO L226 Difference]: Without dead ends: 918 [2018-10-14 18:21:24,824 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11408 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=19843, Invalid=42907, Unknown=0, NotChecked=0, Total=62750 [2018-10-14 18:21:24,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2018-10-14 18:21:24,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 906. [2018-10-14 18:21:24,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 906 states. [2018-10-14 18:21:24,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 906 transitions. [2018-10-14 18:21:24,833 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 906 transitions. Word has length 891 [2018-10-14 18:21:24,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:21:24,834 INFO L481 AbstractCegarLoop]: Abstraction has 906 states and 906 transitions. [2018-10-14 18:21:24,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-10-14 18:21:24,834 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 906 transitions. [2018-10-14 18:21:24,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 906 [2018-10-14 18:21:24,840 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:21:24,840 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 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 18:21:24,840 INFO L424 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:21:24,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:21:24,840 INFO L82 PathProgramCache]: Analyzing trace with hash -6155394, now seen corresponding path program 63 times [2018-10-14 18:21:24,841 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:21:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:21:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 27405 backedges. 0 proven. 27405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:21:30,244 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:21:30,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129] total 129 [2018-10-14 18:21:30,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-10-14 18:21:30,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-10-14 18:21:30,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4224, Invalid=12288, Unknown=0, NotChecked=0, Total=16512 [2018-10-14 18:21:30,246 INFO L87 Difference]: Start difference. First operand 906 states and 906 transitions. Second operand 129 states. [2018-10-14 18:21:39,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:21:39,227 INFO L93 Difference]: Finished difference Result 932 states and 932 transitions. [2018-10-14 18:21:39,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2018-10-14 18:21:39,228 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 905 [2018-10-14 18:21:39,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:21:39,231 INFO L225 Difference]: With dead ends: 932 [2018-10-14 18:21:39,232 INFO L226 Difference]: Without dead ends: 932 [2018-10-14 18:21:39,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11781 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=20478, Invalid=44292, Unknown=0, NotChecked=0, Total=64770 [2018-10-14 18:21:39,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2018-10-14 18:21:39,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 920. [2018-10-14 18:21:39,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 920 states. [2018-10-14 18:21:39,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 920 transitions. [2018-10-14 18:21:39,241 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 920 transitions. Word has length 905 [2018-10-14 18:21:39,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:21:39,242 INFO L481 AbstractCegarLoop]: Abstraction has 920 states and 920 transitions. [2018-10-14 18:21:39,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-10-14 18:21:39,242 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 920 transitions. [2018-10-14 18:21:39,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 920 [2018-10-14 18:21:39,248 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:21:39,248 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 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 18:21:39,248 INFO L424 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:21:39,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:21:39,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1065516791, now seen corresponding path program 64 times [2018-10-14 18:21:39,249 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:21:39,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:21:44,728 INFO L134 CoverageAnalysis]: Checked inductivity of 28288 backedges. 0 proven. 28288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:21:44,729 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:21:44,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131] total 131 [2018-10-14 18:21:44,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-10-14 18:21:44,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-10-14 18:21:44,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4355, Invalid=12675, Unknown=0, NotChecked=0, Total=17030 [2018-10-14 18:21:44,731 INFO L87 Difference]: Start difference. First operand 920 states and 920 transitions. Second operand 131 states. [2018-10-14 18:21:53,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:21:53,749 INFO L93 Difference]: Finished difference Result 946 states and 946 transitions. [2018-10-14 18:21:53,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2018-10-14 18:21:53,749 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 919 [2018-10-14 18:21:53,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:21:53,753 INFO L225 Difference]: With dead ends: 946 [2018-10-14 18:21:53,753 INFO L226 Difference]: Without dead ends: 946 [2018-10-14 18:21:53,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12160 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=21123, Invalid=45699, Unknown=0, NotChecked=0, Total=66822 [2018-10-14 18:21:53,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2018-10-14 18:21:53,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 934. [2018-10-14 18:21:53,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 934 states. [2018-10-14 18:21:53,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 934 transitions. [2018-10-14 18:21:53,765 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 934 transitions. Word has length 919 [2018-10-14 18:21:53,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:21:53,765 INFO L481 AbstractCegarLoop]: Abstraction has 934 states and 934 transitions. [2018-10-14 18:21:53,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-10-14 18:21:53,766 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 934 transitions. [2018-10-14 18:21:53,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 934 [2018-10-14 18:21:53,773 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:21:53,774 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 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 18:21:53,774 INFO L424 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:21:53,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:21:53,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1669800108, now seen corresponding path program 65 times [2018-10-14 18:21:53,775 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:21:53,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:21:59,443 INFO L134 CoverageAnalysis]: Checked inductivity of 29185 backedges. 0 proven. 29185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:21:59,444 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:21:59,444 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133] total 133 [2018-10-14 18:21:59,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 133 states [2018-10-14 18:21:59,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2018-10-14 18:21:59,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4488, Invalid=13068, Unknown=0, NotChecked=0, Total=17556 [2018-10-14 18:21:59,445 INFO L87 Difference]: Start difference. First operand 934 states and 934 transitions. Second operand 133 states. [2018-10-14 18:22:08,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:22:08,877 INFO L93 Difference]: Finished difference Result 960 states and 960 transitions. [2018-10-14 18:22:08,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2018-10-14 18:22:08,877 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 933 [2018-10-14 18:22:08,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:22:08,880 INFO L225 Difference]: With dead ends: 960 [2018-10-14 18:22:08,880 INFO L226 Difference]: Without dead ends: 960 [2018-10-14 18:22:08,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12545 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=21778, Invalid=47128, Unknown=0, NotChecked=0, Total=68906 [2018-10-14 18:22:08,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2018-10-14 18:22:08,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 948. [2018-10-14 18:22:08,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 948 states. [2018-10-14 18:22:08,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 948 transitions. [2018-10-14 18:22:08,893 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 948 transitions. Word has length 933 [2018-10-14 18:22:08,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:22:08,894 INFO L481 AbstractCegarLoop]: Abstraction has 948 states and 948 transitions. [2018-10-14 18:22:08,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 133 states. [2018-10-14 18:22:08,894 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 948 transitions. [2018-10-14 18:22:08,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 948 [2018-10-14 18:22:08,901 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:22:08,901 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 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 18:22:08,901 INFO L424 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:22:08,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:22:08,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1233116767, now seen corresponding path program 66 times [2018-10-14 18:22:08,902 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:22:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:22:14,860 INFO L134 CoverageAnalysis]: Checked inductivity of 30096 backedges. 0 proven. 30096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:22:14,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:22:14,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135] total 135 [2018-10-14 18:22:14,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 135 states [2018-10-14 18:22:14,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2018-10-14 18:22:14,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4623, Invalid=13467, Unknown=0, NotChecked=0, Total=18090 [2018-10-14 18:22:14,863 INFO L87 Difference]: Start difference. First operand 948 states and 948 transitions. Second operand 135 states. [2018-10-14 18:22:24,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:22:24,559 INFO L93 Difference]: Finished difference Result 974 states and 974 transitions. [2018-10-14 18:22:24,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2018-10-14 18:22:24,559 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 947 [2018-10-14 18:22:24,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:22:24,561 INFO L225 Difference]: With dead ends: 974 [2018-10-14 18:22:24,561 INFO L226 Difference]: Without dead ends: 974 [2018-10-14 18:22:24,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12936 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=22443, Invalid=48579, Unknown=0, NotChecked=0, Total=71022 [2018-10-14 18:22:24,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2018-10-14 18:22:24,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 962. [2018-10-14 18:22:24,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 962 states. [2018-10-14 18:22:24,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 962 transitions. [2018-10-14 18:22:24,572 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 962 transitions. Word has length 947 [2018-10-14 18:22:24,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:22:24,573 INFO L481 AbstractCegarLoop]: Abstraction has 962 states and 962 transitions. [2018-10-14 18:22:24,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 135 states. [2018-10-14 18:22:24,573 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 962 transitions. [2018-10-14 18:22:24,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 962 [2018-10-14 18:22:24,582 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:22:24,582 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 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 18:22:24,582 INFO L424 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:22:24,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:22:24,583 INFO L82 PathProgramCache]: Analyzing trace with hash 524955178, now seen corresponding path program 67 times [2018-10-14 18:22:24,583 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:22:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:22:30,758 INFO L134 CoverageAnalysis]: Checked inductivity of 31021 backedges. 0 proven. 31021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:22:30,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:22:30,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137] total 137 [2018-10-14 18:22:30,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-10-14 18:22:30,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-10-14 18:22:30,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4760, Invalid=13872, Unknown=0, NotChecked=0, Total=18632 [2018-10-14 18:22:30,760 INFO L87 Difference]: Start difference. First operand 962 states and 962 transitions. Second operand 137 states. [2018-10-14 18:22:40,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:22:40,514 INFO L93 Difference]: Finished difference Result 988 states and 988 transitions. [2018-10-14 18:22:40,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2018-10-14 18:22:40,515 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 961 [2018-10-14 18:22:40,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:22:40,516 INFO L225 Difference]: With dead ends: 988 [2018-10-14 18:22:40,516 INFO L226 Difference]: Without dead ends: 988 [2018-10-14 18:22:40,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13333 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=23118, Invalid=50052, Unknown=0, NotChecked=0, Total=73170 [2018-10-14 18:22:40,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2018-10-14 18:22:40,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 976. [2018-10-14 18:22:40,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 976 states. [2018-10-14 18:22:40,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 976 transitions. [2018-10-14 18:22:40,525 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 976 transitions. Word has length 961 [2018-10-14 18:22:40,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:22:40,526 INFO L481 AbstractCegarLoop]: Abstraction has 976 states and 976 transitions. [2018-10-14 18:22:40,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-10-14 18:22:40,526 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 976 transitions. [2018-10-14 18:22:40,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 976 [2018-10-14 18:22:40,534 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:22:40,535 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 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 18:22:40,535 INFO L424 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:22:40,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:22:40,535 INFO L82 PathProgramCache]: Analyzing trace with hash 39550645, now seen corresponding path program 68 times [2018-10-14 18:22:40,536 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:22:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:22:46,952 INFO L134 CoverageAnalysis]: Checked inductivity of 31960 backedges. 0 proven. 31960 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:22:46,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:22:46,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139] total 139 [2018-10-14 18:22:46,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-10-14 18:22:46,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-10-14 18:22:46,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4899, Invalid=14283, Unknown=0, NotChecked=0, Total=19182 [2018-10-14 18:22:46,954 INFO L87 Difference]: Start difference. First operand 976 states and 976 transitions. Second operand 139 states. [2018-10-14 18:22:57,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:22:57,305 INFO L93 Difference]: Finished difference Result 1002 states and 1002 transitions. [2018-10-14 18:22:57,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 207 states. [2018-10-14 18:22:57,306 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 975 [2018-10-14 18:22:57,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:22:57,307 INFO L225 Difference]: With dead ends: 1002 [2018-10-14 18:22:57,307 INFO L226 Difference]: Without dead ends: 1002 [2018-10-14 18:22:57,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13736 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=23803, Invalid=51547, Unknown=0, NotChecked=0, Total=75350 [2018-10-14 18:22:57,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2018-10-14 18:22:57,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 990. [2018-10-14 18:22:57,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 990 states. [2018-10-14 18:22:57,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 990 transitions. [2018-10-14 18:22:57,315 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 990 transitions. Word has length 975 [2018-10-14 18:22:57,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:22:57,316 INFO L481 AbstractCegarLoop]: Abstraction has 990 states and 990 transitions. [2018-10-14 18:22:57,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 139 states. [2018-10-14 18:22:57,316 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 990 transitions. [2018-10-14 18:22:57,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 990 [2018-10-14 18:22:57,323 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:22:57,323 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 69, 69, 69, 69, 69, 69, 69, 69, 69, 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 18:22:57,323 INFO L424 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:22:57,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:22:57,324 INFO L82 PathProgramCache]: Analyzing trace with hash 251887616, now seen corresponding path program 69 times [2018-10-14 18:22:57,324 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:22:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:23:03,786 INFO L134 CoverageAnalysis]: Checked inductivity of 32913 backedges. 0 proven. 32913 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:23:03,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:23:03,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [141] total 141 [2018-10-14 18:23:03,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 141 states [2018-10-14 18:23:03,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2018-10-14 18:23:03,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5040, Invalid=14700, Unknown=0, NotChecked=0, Total=19740 [2018-10-14 18:23:03,788 INFO L87 Difference]: Start difference. First operand 990 states and 990 transitions. Second operand 141 states. [2018-10-14 18:23:14,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:23:14,278 INFO L93 Difference]: Finished difference Result 1016 states and 1016 transitions. [2018-10-14 18:23:14,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2018-10-14 18:23:14,279 INFO L78 Accepts]: Start accepts. Automaton has 141 states. Word has length 989 [2018-10-14 18:23:14,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:23:14,280 INFO L225 Difference]: With dead ends: 1016 [2018-10-14 18:23:14,280 INFO L226 Difference]: Without dead ends: 1016 [2018-10-14 18:23:14,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14145 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=24498, Invalid=53064, Unknown=0, NotChecked=0, Total=77562 [2018-10-14 18:23:14,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2018-10-14 18:23:14,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 1004. [2018-10-14 18:23:14,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1004 states. [2018-10-14 18:23:14,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1004 transitions. [2018-10-14 18:23:14,288 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1004 transitions. Word has length 989 [2018-10-14 18:23:14,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:23:14,289 INFO L481 AbstractCegarLoop]: Abstraction has 1004 states and 1004 transitions. [2018-10-14 18:23:14,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 141 states. [2018-10-14 18:23:14,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1004 transitions. [2018-10-14 18:23:14,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1004 [2018-10-14 18:23:14,296 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:23:14,297 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 70, 70, 70, 70, 70, 70, 70, 70, 70, 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 18:23:14,297 INFO L424 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:23:14,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:23:14,297 INFO L82 PathProgramCache]: Analyzing trace with hash 73261579, now seen corresponding path program 70 times [2018-10-14 18:23:14,298 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:23:14,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:23:21,106 INFO L134 CoverageAnalysis]: Checked inductivity of 33880 backedges. 0 proven. 33880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:23:21,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:23:21,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [143] total 143 [2018-10-14 18:23:21,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 143 states [2018-10-14 18:23:21,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2018-10-14 18:23:21,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5183, Invalid=15123, Unknown=0, NotChecked=0, Total=20306 [2018-10-14 18:23:21,109 INFO L87 Difference]: Start difference. First operand 1004 states and 1004 transitions. Second operand 143 states. [2018-10-14 18:23:31,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:23:31,880 INFO L93 Difference]: Finished difference Result 1030 states and 1030 transitions. [2018-10-14 18:23:31,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 213 states. [2018-10-14 18:23:31,880 INFO L78 Accepts]: Start accepts. Automaton has 143 states. Word has length 1003 [2018-10-14 18:23:31,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:23:31,882 INFO L225 Difference]: With dead ends: 1030 [2018-10-14 18:23:31,882 INFO L226 Difference]: Without dead ends: 1030 [2018-10-14 18:23:31,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14560 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=25203, Invalid=54603, Unknown=0, NotChecked=0, Total=79806 [2018-10-14 18:23:31,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2018-10-14 18:23:31,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 1018. [2018-10-14 18:23:31,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1018 states. [2018-10-14 18:23:31,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1018 transitions. [2018-10-14 18:23:31,889 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1018 transitions. Word has length 1003 [2018-10-14 18:23:31,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:23:31,890 INFO L481 AbstractCegarLoop]: Abstraction has 1018 states and 1018 transitions. [2018-10-14 18:23:31,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 143 states. [2018-10-14 18:23:31,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1018 transitions. [2018-10-14 18:23:31,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1018 [2018-10-14 18:23:31,897 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:23:31,898 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 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 18:23:31,898 INFO L424 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:23:31,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:23:31,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1867666646, now seen corresponding path program 71 times [2018-10-14 18:23:31,899 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:23:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 18:23:38,866 INFO L134 CoverageAnalysis]: Checked inductivity of 34861 backedges. 0 proven. 34861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 18:23:38,867 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 18:23:38,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [145] total 145 [2018-10-14 18:23:38,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 145 states [2018-10-14 18:23:38,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2018-10-14 18:23:38,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5328, Invalid=15552, Unknown=0, NotChecked=0, Total=20880 [2018-10-14 18:23:38,869 INFO L87 Difference]: Start difference. First operand 1018 states and 1018 transitions. Second operand 145 states. [2018-10-14 18:23:49,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 18:23:49,925 INFO L93 Difference]: Finished difference Result 1044 states and 1044 transitions. [2018-10-14 18:23:49,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2018-10-14 18:23:49,926 INFO L78 Accepts]: Start accepts. Automaton has 145 states. Word has length 1017 [2018-10-14 18:23:49,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 18:23:49,927 INFO L225 Difference]: With dead ends: 1044 [2018-10-14 18:23:49,927 INFO L226 Difference]: Without dead ends: 1044 [2018-10-14 18:23:49,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14981 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=25918, Invalid=56164, Unknown=0, NotChecked=0, Total=82082 [2018-10-14 18:23:49,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2018-10-14 18:23:49,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 1032. [2018-10-14 18:23:49,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2018-10-14 18:23:49,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1032 transitions. [2018-10-14 18:23:49,938 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1032 transitions. Word has length 1017 [2018-10-14 18:23:49,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 18:23:49,938 INFO L481 AbstractCegarLoop]: Abstraction has 1032 states and 1032 transitions. [2018-10-14 18:23:49,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 145 states. [2018-10-14 18:23:49,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1032 transitions. [2018-10-14 18:23:49,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1032 [2018-10-14 18:23:49,945 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 18:23:49,946 INFO L375 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 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 18:23:49,946 INFO L424 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 18:23:49,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 18:23:49,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1785427871, now seen corresponding path program 72 times [2018-10-14 18:23:49,947 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 18:23:50,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat