java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplTransformed.xml -s ../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf -i ../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_false-valid-deref.i_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-502d2f4 [2018-10-12 22:28:24,611 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-12 22:28:24,615 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-12 22:28:24,630 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-12 22:28:24,630 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-12 22:28:24,631 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-12 22:28:24,632 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-12 22:28:24,634 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-12 22:28:24,636 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-12 22:28:24,637 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-12 22:28:24,638 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-12 22:28:24,638 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-12 22:28:24,642 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-12 22:28:24,643 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-12 22:28:24,648 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-12 22:28:24,649 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-12 22:28:24,650 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-12 22:28:24,652 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-12 22:28:24,658 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-12 22:28:24,662 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-12 22:28:24,663 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-12 22:28:24,668 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-12 22:28:24,674 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-12 22:28:24,689 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf [2018-10-12 22:28:24,711 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-12 22:28:24,711 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-12 22:28:24,712 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-12 22:28:24,713 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-12 22:28:24,713 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-12 22:28:24,713 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-12 22:28:24,714 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-12 22:28:24,714 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-12 22:28:24,714 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-12 22:28:24,714 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-12 22:28:24,719 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-12 22:28:24,719 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-12 22:28:24,719 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-12 22:28:24,721 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-12 22:28:24,722 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-12 22:28:24,783 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-12 22:28:24,800 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-12 22:28:24,807 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-12 22:28:24,809 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-12 22:28:24,810 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-12 22:28:24,811 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_false-valid-deref.i_5.bpl [2018-10-12 22:28:24,811 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_false-valid-deref.i_5.bpl' [2018-10-12 22:28:24,875 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-12 22:28:24,877 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-12 22:28:24,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-12 22:28:24,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-12 22:28:24,878 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-12 22:28:24,907 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 10:28:24" (1/1) ... [2018-10-12 22:28:24,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 10:28:24" (1/1) ... [2018-10-12 22:28:24,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 10:28:24" (1/1) ... [2018-10-12 22:28:24,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 10:28:24" (1/1) ... [2018-10-12 22:28:24,931 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 10:28:24" (1/1) ... [2018-10-12 22:28:24,934 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 10:28:24" (1/1) ... [2018-10-12 22:28:24,935 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 10:28:24" (1/1) ... [2018-10-12 22:28:24,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-12 22:28:24,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-12 22:28:24,939 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-12 22:28:24,939 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-12 22:28:24,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 10:28:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-12 22:28:25,018 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-12 22:28:25,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-12 22:28:25,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-12 22:28:25,664 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-12 22:28:25,665 INFO L202 PluginConnector]: Adding new model 960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:28:25 BoogieIcfgContainer [2018-10-12 22:28:25,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-12 22:28:25,666 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2018-10-12 22:28:25,666 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2018-10-12 22:28:25,667 INFO L276 PluginConnector]: IcfgTransformer initialized [2018-10-12 22:28:25,671 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:28:25" (1/1) ... [2018-10-12 22:28:25,680 INFO L137 apSepIcfgTransformer]: HeapSepIcfgTransformer: Starting heap partitioning [2018-10-12 22:28:25,680 INFO L138 apSepIcfgTransformer]: To be partitioned heap arrays found [#memory_int] [2018-10-12 22:28:25,720 INFO L191 apSepIcfgTransformer]: Heap separator: starting loc-array-style preprocessing [2018-10-12 22:28:25,794 INFO L219 apSepIcfgTransformer]: finished MemlocArrayUpdater [2018-10-12 22:28:25,811 INFO L282 apSepIcfgTransformer]: finished preprocessing for the equality analysis [2018-10-12 22:28:25,879 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=1) [2018-10-12 22:29:02,171 INFO L315 AbstractInterpreter]: Visited 61 different actions 94 times. Merged at 14 different actions 31 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-10-12 22:29:02,173 INFO L306 apSepIcfgTransformer]: finished equality analysis [2018-10-12 22:29:02,177 INFO L318 apSepIcfgTransformer]: Finished detection of select terms ("array reads") [2018-10-12 22:29:02,248 WARN L152 HeapPartitionManager]: No literal set constraint found for loc-array access (select |v_#locv_ULTIMATE.start_write~int_old_#memory_int_4_1_1| |v_ULTIMATE.start_write~int_#ptr.base_13|) at (assume write~int_old_#memory_int[write~int_#ptr.base := write~int_old_#memory_int[write~int_#ptr.base][write~int_#ptr.offset := write~int_#value]] == #memory_int;) [2018-10-12 22:29:02,299 INFO L232 HeapPartitionManager]: partitioning result: [2018-10-12 22:29:02,300 INFO L237 HeapPartitionManager]: location blocks for array group [#memory_int, ULTIMATE.start_write~int_old_#memory_int] [2018-10-12 22:29:02,300 INFO L246 HeapPartitionManager]: at dimension 1 [2018-10-12 22:29:02,300 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 3 [2018-10-12 22:29:02,300 INFO L248 HeapPartitionManager]: # location blocks :2 [2018-10-12 22:29:02,301 INFO L246 HeapPartitionManager]: at dimension 2 [2018-10-12 22:29:02,301 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 0 [2018-10-12 22:29:02,301 INFO L248 HeapPartitionManager]: # location blocks :0 [2018-10-12 22:29:02,301 INFO L237 HeapPartitionManager]: location blocks for array group [#memory_int, ULTIMATE.start_write~int_old_#memory_int] [2018-10-12 22:29:02,301 INFO L246 HeapPartitionManager]: at dimension 1 [2018-10-12 22:29:02,302 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 3 [2018-10-12 22:29:02,302 INFO L248 HeapPartitionManager]: # location blocks :2 [2018-10-12 22:29:02,302 INFO L246 HeapPartitionManager]: at dimension 2 [2018-10-12 22:29:02,302 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 0 [2018-10-12 22:29:02,302 INFO L248 HeapPartitionManager]: # location blocks :0 [2018-10-12 22:29:02,303 INFO L145 ransitionTransformer]: executing heap partitioning transformation [2018-10-12 22:29:02,318 INFO L202 PluginConnector]: Adding new model 960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 12.10 10:29:02 BasicIcfg [2018-10-12 22:29:02,318 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2018-10-12 22:29:02,322 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-12 22:29:02,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-12 22:29:02,325 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-12 22:29:02,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 10:28:24" (1/3) ... [2018-10-12 22:29:02,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f55992f and model type 960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:29:02, skipping insertion in model container [2018-10-12 22:29:02,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:28:25" (2/3) ... [2018-10-12 22:29:02,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f55992f and model type 960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 10:29:02, skipping insertion in model container [2018-10-12 22:29:02,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 12.10 10:29:02" (3/3) ... [2018-10-12 22:29:02,331 INFO L112 eAbstractionObserver]: Analyzing ICFG memPartitionedIcfg [2018-10-12 22:29:02,342 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-10-12 22:29:02,351 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-12 22:29:02,368 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-12 22:29:02,396 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-12 22:29:02,397 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-12 22:29:02,398 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-12 22:29:02,399 INFO L384 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-10-12 22:29:02,399 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-12 22:29:02,399 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-12 22:29:02,400 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-12 22:29:02,400 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-12 22:29:02,400 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-12 22:29:02,416 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2018-10-12 22:29:02,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-12 22:29:02,431 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:29:02,433 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:29:02,434 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:29:02,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:29:02,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1565987991, now seen corresponding path program 1 times [2018-10-12 22:29:02,505 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:29:02,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:29:03,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:29:03,738 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-12 22:29:03,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2018-10-12 22:29:03,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-12 22:29:03,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-12 22:29:03,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-10-12 22:29:03,759 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 14 states. [2018-10-12 22:29:04,632 WARN L178 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2018-10-12 22:29:05,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:29:05,184 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-12 22:29:05,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-12 22:29:05,186 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2018-10-12 22:29:05,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:29:05,197 INFO L225 Difference]: With dead ends: 74 [2018-10-12 22:29:05,198 INFO L226 Difference]: Without dead ends: 74 [2018-10-12 22:29:05,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2018-10-12 22:29:05,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-12 22:29:05,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2018-10-12 22:29:05,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-12 22:29:05,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-12 22:29:05,243 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 51 [2018-10-12 22:29:05,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:29:05,244 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-12 22:29:05,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-12 22:29:05,244 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-12 22:29:05,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-12 22:29:05,246 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:29:05,247 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:29:05,247 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:29:05,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:29:05,248 INFO L82 PathProgramCache]: Analyzing trace with hash -725690753, now seen corresponding path program 1 times [2018-10-12 22:29:05,249 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:29:05,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:29:05,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:29:05,795 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:29:05,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-12 22:29:05,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-12 22:29:05,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-12 22:29:05,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2018-10-12 22:29:05,799 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 17 states. [2018-10-12 22:29:07,226 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-12 22:29:07,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:29:07,378 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-12 22:29:07,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-12 22:29:07,379 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2018-10-12 22:29:07,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:29:07,382 INFO L225 Difference]: With dead ends: 86 [2018-10-12 22:29:07,382 INFO L226 Difference]: Without dead ends: 86 [2018-10-12 22:29:07,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=388, Invalid=1094, Unknown=0, NotChecked=0, Total=1482 [2018-10-12 22:29:07,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-12 22:29:07,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2018-10-12 22:29:07,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-12 22:29:07,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-12 22:29:07,391 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 63 [2018-10-12 22:29:07,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:29:07,392 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-12 22:29:07,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-12 22:29:07,392 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-12 22:29:07,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-12 22:29:07,394 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:29:07,395 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:29:07,395 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:29:07,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:29:07,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1481309287, now seen corresponding path program 2 times [2018-10-12 22:29:07,396 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:29:07,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:29:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:29:07,948 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:29:07,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-12 22:29:07,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-12 22:29:07,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-12 22:29:07,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2018-10-12 22:29:07,950 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 20 states. [2018-10-12 22:29:08,889 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2018-10-12 22:29:09,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:29:09,949 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-12 22:29:09,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-12 22:29:09,950 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2018-10-12 22:29:09,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:29:09,952 INFO L225 Difference]: With dead ends: 98 [2018-10-12 22:29:09,952 INFO L226 Difference]: Without dead ends: 98 [2018-10-12 22:29:09,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=471, Invalid=1509, Unknown=0, NotChecked=0, Total=1980 [2018-10-12 22:29:09,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-12 22:29:09,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2018-10-12 22:29:09,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-12 22:29:09,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-12 22:29:09,964 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 75 [2018-10-12 22:29:09,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:29:09,965 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-12 22:29:09,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-12 22:29:09,965 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-12 22:29:09,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-12 22:29:09,967 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:29:09,967 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:29:09,967 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:29:09,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:29:09,968 INFO L82 PathProgramCache]: Analyzing trace with hash 8750671, now seen corresponding path program 3 times [2018-10-12 22:29:09,969 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:29:09,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:29:10,446 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:29:10,446 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:29:10,446 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-12 22:29:10,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-12 22:29:10,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-12 22:29:10,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2018-10-12 22:29:10,448 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 22 states. [2018-10-12 22:29:12,251 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-12 22:29:13,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:29:13,126 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-12 22:29:13,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-12 22:29:13,127 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 87 [2018-10-12 22:29:13,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:29:13,129 INFO L225 Difference]: With dead ends: 110 [2018-10-12 22:29:13,129 INFO L226 Difference]: Without dead ends: 110 [2018-10-12 22:29:13,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=547, Invalid=1903, Unknown=0, NotChecked=0, Total=2450 [2018-10-12 22:29:13,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-12 22:29:13,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2018-10-12 22:29:13,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-12 22:29:13,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-12 22:29:13,137 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 87 [2018-10-12 22:29:13,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:29:13,138 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-12 22:29:13,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-12 22:29:13,138 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-12 22:29:13,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-12 22:29:13,140 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:29:13,140 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:29:13,140 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:29:13,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:29:13,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1727558711, now seen corresponding path program 4 times [2018-10-12 22:29:13,142 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:29:13,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:29:13,964 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:29:13,964 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:29:13,964 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-12 22:29:13,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-12 22:29:13,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-12 22:29:13,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2018-10-12 22:29:13,966 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 24 states. [2018-10-12 22:29:16,803 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2018-10-12 22:29:16,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:29:16,904 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-10-12 22:29:16,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-12 22:29:16,904 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 99 [2018-10-12 22:29:16,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:29:16,907 INFO L225 Difference]: With dead ends: 122 [2018-10-12 22:29:16,907 INFO L226 Difference]: Without dead ends: 122 [2018-10-12 22:29:16,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=623, Invalid=2347, Unknown=0, NotChecked=0, Total=2970 [2018-10-12 22:29:16,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-12 22:29:16,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 112. [2018-10-12 22:29:16,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-12 22:29:16,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-12 22:29:16,916 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 99 [2018-10-12 22:29:16,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:29:16,916 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-12 22:29:16,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-12 22:29:16,916 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-12 22:29:16,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-12 22:29:16,918 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:29:16,918 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:29:16,918 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:29:16,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:29:16,919 INFO L82 PathProgramCache]: Analyzing trace with hash 640534047, now seen corresponding path program 5 times [2018-10-12 22:29:16,920 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:29:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:29:17,594 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:29:17,594 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:29:17,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-12 22:29:17,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-12 22:29:17,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-12 22:29:17,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2018-10-12 22:29:17,596 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 28 states. [2018-10-12 22:29:19,464 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:29:19,865 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:29:20,014 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:29:21,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:29:21,230 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-10-12 22:29:21,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-12 22:29:21,230 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 111 [2018-10-12 22:29:21,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:29:21,233 INFO L225 Difference]: With dead ends: 134 [2018-10-12 22:29:21,233 INFO L226 Difference]: Without dead ends: 134 [2018-10-12 22:29:21,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1004, Invalid=3156, Unknown=0, NotChecked=0, Total=4160 [2018-10-12 22:29:21,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-12 22:29:21,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 124. [2018-10-12 22:29:21,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-12 22:29:21,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-10-12 22:29:21,242 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 111 [2018-10-12 22:29:21,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:29:21,242 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-10-12 22:29:21,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-12 22:29:21,242 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-10-12 22:29:21,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-12 22:29:21,244 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:29:21,245 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:29:21,245 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:29:21,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:29:21,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1504672775, now seen corresponding path program 6 times [2018-10-12 22:29:21,246 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:29:21,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:29:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:29:21,928 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:29:21,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-10-12 22:29:21,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-12 22:29:21,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-12 22:29:21,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2018-10-12 22:29:21,929 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 30 states. [2018-10-12 22:29:23,678 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2018-10-12 22:29:24,287 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-12 22:29:24,622 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:29:25,083 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:29:25,591 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-12 22:29:26,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:29:26,382 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-10-12 22:29:26,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-12 22:29:26,382 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 123 [2018-10-12 22:29:26,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:29:26,384 INFO L225 Difference]: With dead ends: 146 [2018-10-12 22:29:26,384 INFO L226 Difference]: Without dead ends: 146 [2018-10-12 22:29:26,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1064, Invalid=3628, Unknown=0, NotChecked=0, Total=4692 [2018-10-12 22:29:26,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-12 22:29:26,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 136. [2018-10-12 22:29:26,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-12 22:29:26,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-10-12 22:29:26,392 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 123 [2018-10-12 22:29:26,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:29:26,392 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-10-12 22:29:26,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-12 22:29:26,393 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-10-12 22:29:26,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-12 22:29:26,396 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:29:26,397 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:29:26,397 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:29:26,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:29:26,397 INFO L82 PathProgramCache]: Analyzing trace with hash 503813615, now seen corresponding path program 7 times [2018-10-12 22:29:26,401 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:29:26,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:29:26,971 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-12 22:29:27,911 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:29:27,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:29:27,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-12 22:29:27,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-12 22:29:27,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-12 22:29:27,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2018-10-12 22:29:27,913 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 32 states. [2018-10-12 22:29:28,626 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-12 22:29:29,961 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-12 22:29:33,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:29:33,395 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-10-12 22:29:33,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-12 22:29:33,396 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 135 [2018-10-12 22:29:33,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:29:33,397 INFO L225 Difference]: With dead ends: 158 [2018-10-12 22:29:33,397 INFO L226 Difference]: Without dead ends: 158 [2018-10-12 22:29:33,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1413, Invalid=4439, Unknown=0, NotChecked=0, Total=5852 [2018-10-12 22:29:33,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-12 22:29:33,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2018-10-12 22:29:33,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-12 22:29:33,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-12 22:29:33,404 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 135 [2018-10-12 22:29:33,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:29:33,405 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-12 22:29:33,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-12 22:29:33,405 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-12 22:29:33,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-12 22:29:33,407 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:29:33,407 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:29:33,407 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:29:33,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:29:33,408 INFO L82 PathProgramCache]: Analyzing trace with hash 281023447, now seen corresponding path program 8 times [2018-10-12 22:29:33,409 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:29:33,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:29:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:29:34,541 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:29:34,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-12 22:29:34,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-12 22:29:34,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-12 22:29:34,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2018-10-12 22:29:34,542 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 32 states. [2018-10-12 22:29:39,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:29:39,976 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2018-10-12 22:29:39,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-12 22:29:39,977 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 147 [2018-10-12 22:29:39,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:29:39,978 INFO L225 Difference]: With dead ends: 170 [2018-10-12 22:29:39,979 INFO L226 Difference]: Without dead ends: 170 [2018-10-12 22:29:39,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=927, Invalid=4623, Unknown=0, NotChecked=0, Total=5550 [2018-10-12 22:29:39,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-12 22:29:39,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2018-10-12 22:29:39,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-12 22:29:39,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-10-12 22:29:39,986 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 147 [2018-10-12 22:29:39,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:29:39,987 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-10-12 22:29:39,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-12 22:29:39,987 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-10-12 22:29:39,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-12 22:29:39,989 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:29:39,989 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:29:39,989 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:29:39,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:29:39,990 INFO L82 PathProgramCache]: Analyzing trace with hash -798820929, now seen corresponding path program 9 times [2018-10-12 22:29:39,990 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:29:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:29:40,836 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:29:40,836 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:29:40,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-10-12 22:29:40,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-12 22:29:40,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-12 22:29:40,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2018-10-12 22:29:40,838 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 36 states. [2018-10-12 22:29:42,712 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-12 22:29:43,748 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:29:44,155 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-12 22:29:44,340 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:29:44,516 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:29:44,916 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:29:45,464 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:29:47,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:29:47,013 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2018-10-12 22:29:47,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-12 22:29:47,013 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 159 [2018-10-12 22:29:47,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:29:47,015 INFO L225 Difference]: With dead ends: 182 [2018-10-12 22:29:47,015 INFO L226 Difference]: Without dead ends: 182 [2018-10-12 22:29:47,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1890, Invalid=5942, Unknown=0, NotChecked=0, Total=7832 [2018-10-12 22:29:47,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-12 22:29:47,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 172. [2018-10-12 22:29:47,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-10-12 22:29:47,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2018-10-12 22:29:47,021 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 159 [2018-10-12 22:29:47,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:29:47,022 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2018-10-12 22:29:47,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-12 22:29:47,022 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2018-10-12 22:29:47,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-12 22:29:47,023 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:29:47,024 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:29:47,024 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:29:47,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:29:47,024 INFO L82 PathProgramCache]: Analyzing trace with hash 2088385447, now seen corresponding path program 10 times [2018-10-12 22:29:47,025 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:29:47,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:29:48,476 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:29:48,476 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:29:48,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-12 22:29:48,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-12 22:29:48,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-12 22:29:48,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2018-10-12 22:29:48,478 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 38 states. [2018-10-12 22:29:50,957 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-12 22:29:51,100 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:29:51,530 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:29:51,676 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:29:52,078 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:29:52,227 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:29:52,715 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:29:52,878 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:29:53,361 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:29:53,521 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:29:53,953 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:29:54,123 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-12 22:29:54,415 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2018-10-12 22:29:54,614 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-12 22:29:55,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:29:55,590 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2018-10-12 22:29:55,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-12 22:29:55,596 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 171 [2018-10-12 22:29:55,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:29:55,599 INFO L225 Difference]: With dead ends: 194 [2018-10-12 22:29:55,599 INFO L226 Difference]: Without dead ends: 194 [2018-10-12 22:29:55,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1966, Invalid=6590, Unknown=0, NotChecked=0, Total=8556 [2018-10-12 22:29:55,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-12 22:29:55,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 184. [2018-10-12 22:29:55,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-12 22:29:55,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2018-10-12 22:29:55,606 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 171 [2018-10-12 22:29:55,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:29:55,607 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2018-10-12 22:29:55,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-12 22:29:55,607 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2018-10-12 22:29:55,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-12 22:29:55,608 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:29:55,608 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:29:55,608 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:29:55,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:29:55,609 INFO L82 PathProgramCache]: Analyzing trace with hash 898622863, now seen corresponding path program 11 times [2018-10-12 22:29:55,609 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:29:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:29:56,633 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:29:56,633 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:29:56,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-12 22:29:56,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-12 22:29:56,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-12 22:29:56,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1349, Unknown=0, NotChecked=0, Total=1560 [2018-10-12 22:29:56,635 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand 40 states. [2018-10-12 22:29:59,715 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:29:59,873 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:30:00,282 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:30:01,023 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:30:04,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:30:04,240 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2018-10-12 22:30:04,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-12 22:30:04,240 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 183 [2018-10-12 22:30:04,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:30:04,242 INFO L225 Difference]: With dead ends: 206 [2018-10-12 22:30:04,242 INFO L226 Difference]: Without dead ends: 206 [2018-10-12 22:30:04,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=2435, Invalid=7665, Unknown=0, NotChecked=0, Total=10100 [2018-10-12 22:30:04,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-10-12 22:30:04,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 196. [2018-10-12 22:30:04,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-12 22:30:04,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2018-10-12 22:30:04,248 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 183 [2018-10-12 22:30:04,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:30:04,249 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2018-10-12 22:30:04,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-12 22:30:04,249 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2018-10-12 22:30:04,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-10-12 22:30:04,250 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:30:04,251 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:30:04,251 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:30:04,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:30:04,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1657932937, now seen corresponding path program 12 times [2018-10-12 22:30:04,252 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:30:04,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:30:05,587 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:30:05,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:30:05,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-10-12 22:30:05,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-12 22:30:05,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-12 22:30:05,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2018-10-12 22:30:05,589 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 42 states. [2018-10-12 22:30:08,797 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-12 22:30:08,947 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2018-10-12 22:30:09,460 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-12 22:30:09,642 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:30:09,794 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-12 22:30:10,037 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-12 22:30:10,226 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:30:10,405 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:30:10,864 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:30:11,054 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:30:11,520 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:30:11,712 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-12 22:30:12,197 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-12 22:30:12,382 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-12 22:30:12,712 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-12 22:30:12,884 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-12 22:30:13,209 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2018-10-12 22:30:14,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:30:14,117 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2018-10-12 22:30:14,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-12 22:30:14,118 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 195 [2018-10-12 22:30:14,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:30:14,119 INFO L225 Difference]: With dead ends: 218 [2018-10-12 22:30:14,119 INFO L226 Difference]: Without dead ends: 218 [2018-10-12 22:30:14,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2105 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=2185, Invalid=8321, Unknown=0, NotChecked=0, Total=10506 [2018-10-12 22:30:14,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-10-12 22:30:14,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 208. [2018-10-12 22:30:14,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-12 22:30:14,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2018-10-12 22:30:14,124 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 195 [2018-10-12 22:30:14,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:30:14,124 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2018-10-12 22:30:14,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-12 22:30:14,125 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2018-10-12 22:30:14,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-12 22:30:14,126 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:30:14,126 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:30:14,126 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:30:14,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:30:14,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1440638303, now seen corresponding path program 13 times [2018-10-12 22:30:14,127 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:30:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:30:15,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:30:15,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:30:15,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-12 22:30:15,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-12 22:30:15,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-12 22:30:15,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1625, Unknown=0, NotChecked=0, Total=1892 [2018-10-12 22:30:15,915 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 44 states. [2018-10-12 22:30:20,181 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:30:20,356 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:30:24,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:30:24,934 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2018-10-12 22:30:24,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-12 22:30:24,935 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 207 [2018-10-12 22:30:24,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:30:24,936 INFO L225 Difference]: With dead ends: 230 [2018-10-12 22:30:24,936 INFO L226 Difference]: Without dead ends: 230 [2018-10-12 22:30:24,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2716 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=3048, Invalid=9608, Unknown=0, NotChecked=0, Total=12656 [2018-10-12 22:30:24,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-10-12 22:30:24,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 220. [2018-10-12 22:30:24,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-12 22:30:24,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 220 transitions. [2018-10-12 22:30:24,941 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 220 transitions. Word has length 207 [2018-10-12 22:30:24,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:30:24,942 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 220 transitions. [2018-10-12 22:30:24,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-12 22:30:24,942 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 220 transitions. [2018-10-12 22:30:24,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-12 22:30:24,943 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:30:24,943 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:30:24,944 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:30:24,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:30:24,944 INFO L82 PathProgramCache]: Analyzing trace with hash -2094318777, now seen corresponding path program 14 times [2018-10-12 22:30:24,945 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:30:24,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:30:26,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:30:26,313 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:30:26,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-12 22:30:26,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-12 22:30:26,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-12 22:30:26,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1799, Unknown=0, NotChecked=0, Total=2070 [2018-10-12 22:30:26,315 INFO L87 Difference]: Start difference. First operand 220 states and 220 transitions. Second operand 46 states. [2018-10-12 22:30:28,991 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-12 22:30:29,132 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:30:29,582 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:30:29,727 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:30:30,138 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:30:30,311 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:30:30,479 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-12 22:30:30,780 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:30:30,940 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:30:31,369 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:30:31,537 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:30:31,981 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:30:32,153 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:30:32,614 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:30:32,797 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:30:33,282 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:30:33,464 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:30:33,939 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:30:34,127 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:30:34,615 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:30:34,808 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-12 22:30:35,305 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-12 22:30:35,549 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2018-10-12 22:30:36,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:30:36,450 INFO L93 Difference]: Finished difference Result 242 states and 242 transitions. [2018-10-12 22:30:36,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-12 22:30:36,451 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 219 [2018-10-12 22:30:36,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:30:36,453 INFO L225 Difference]: With dead ends: 242 [2018-10-12 22:30:36,453 INFO L226 Difference]: Without dead ends: 242 [2018-10-12 22:30:36,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2906 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=3140, Invalid=10432, Unknown=0, NotChecked=0, Total=13572 [2018-10-12 22:30:36,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-10-12 22:30:36,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 232. [2018-10-12 22:30:36,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-10-12 22:30:36,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2018-10-12 22:30:36,458 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 219 [2018-10-12 22:30:36,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:30:36,459 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2018-10-12 22:30:36,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-12 22:30:36,459 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2018-10-12 22:30:36,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-10-12 22:30:36,460 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:30:36,461 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:30:36,461 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:30:36,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:30:36,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1235121455, now seen corresponding path program 15 times [2018-10-12 22:30:36,462 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:30:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:30:37,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:30:37,840 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:30:37,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-12 22:30:37,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-12 22:30:37,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-12 22:30:37,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1925, Unknown=0, NotChecked=0, Total=2256 [2018-10-12 22:30:37,842 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand 48 states. [2018-10-12 22:30:40,799 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:30:41,351 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:30:43,075 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:30:43,664 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:30:44,278 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:30:45,586 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:30:45,805 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:30:47,032 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:30:48,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:30:48,247 INFO L93 Difference]: Finished difference Result 254 states and 254 transitions. [2018-10-12 22:30:48,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-12 22:30:48,248 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 231 [2018-10-12 22:30:48,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:30:48,250 INFO L225 Difference]: With dead ends: 254 [2018-10-12 22:30:48,250 INFO L226 Difference]: Without dead ends: 254 [2018-10-12 22:30:48,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3423 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=3729, Invalid=11771, Unknown=0, NotChecked=0, Total=15500 [2018-10-12 22:30:48,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-10-12 22:30:48,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 244. [2018-10-12 22:30:48,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-10-12 22:30:48,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 244 transitions. [2018-10-12 22:30:48,256 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 244 transitions. Word has length 231 [2018-10-12 22:30:48,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:30:48,257 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 244 transitions. [2018-10-12 22:30:48,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-12 22:30:48,257 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 244 transitions. [2018-10-12 22:30:48,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-12 22:30:48,258 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:30:48,258 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:30:48,258 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:30:48,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:30:48,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1321341719, now seen corresponding path program 16 times [2018-10-12 22:30:48,259 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:30:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:30:49,156 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-12 22:30:51,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:30:51,539 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:30:51,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-12 22:30:51,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-12 22:30:51,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-12 22:30:51,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2122, Unknown=0, NotChecked=0, Total=2256 [2018-10-12 22:30:51,540 INFO L87 Difference]: Start difference. First operand 244 states and 244 transitions. Second operand 48 states. [2018-10-12 22:31:02,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:31:02,853 INFO L93 Difference]: Finished difference Result 266 states and 266 transitions. [2018-10-12 22:31:02,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-12 22:31:02,853 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 243 [2018-10-12 22:31:02,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:31:02,855 INFO L225 Difference]: With dead ends: 266 [2018-10-12 22:31:02,855 INFO L226 Difference]: Without dead ends: 266 [2018-10-12 22:31:02,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2323 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1535, Invalid=11575, Unknown=0, NotChecked=0, Total=13110 [2018-10-12 22:31:02,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-10-12 22:31:02,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 256. [2018-10-12 22:31:02,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-10-12 22:31:02,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 256 transitions. [2018-10-12 22:31:02,862 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 256 transitions. Word has length 243 [2018-10-12 22:31:02,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:31:02,862 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 256 transitions. [2018-10-12 22:31:02,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-12 22:31:02,863 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 256 transitions. [2018-10-12 22:31:02,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-10-12 22:31:02,864 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:31:02,864 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:31:02,865 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:31:02,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:31:02,865 INFO L82 PathProgramCache]: Analyzing trace with hash 958403839, now seen corresponding path program 17 times [2018-10-12 22:31:02,866 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:31:02,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:31:04,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:31:04,540 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:31:04,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-10-12 22:31:04,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-12 22:31:04,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-12 22:31:04,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=2249, Unknown=0, NotChecked=0, Total=2652 [2018-10-12 22:31:04,542 INFO L87 Difference]: Start difference. First operand 256 states and 256 transitions. Second operand 52 states. [2018-10-12 22:31:07,073 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-12 22:31:08,159 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:31:09,256 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:31:10,411 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:31:11,186 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:31:11,421 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-12 22:31:11,774 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:31:11,961 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:31:12,440 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:31:13,311 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:31:14,691 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:31:16,327 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2018-10-12 22:31:17,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:31:17,514 INFO L93 Difference]: Finished difference Result 278 states and 278 transitions. [2018-10-12 22:31:17,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-12 22:31:17,514 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 255 [2018-10-12 22:31:17,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:31:17,516 INFO L225 Difference]: With dead ends: 278 [2018-10-12 22:31:17,516 INFO L226 Difference]: Without dead ends: 278 [2018-10-12 22:31:17,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4214 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=4478, Invalid=14154, Unknown=0, NotChecked=0, Total=18632 [2018-10-12 22:31:17,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-10-12 22:31:17,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 268. [2018-10-12 22:31:17,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-10-12 22:31:17,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 268 transitions. [2018-10-12 22:31:17,522 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 268 transitions. Word has length 255 [2018-10-12 22:31:17,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:31:17,522 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 268 transitions. [2018-10-12 22:31:17,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-12 22:31:17,522 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 268 transitions. [2018-10-12 22:31:17,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-10-12 22:31:17,524 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:31:17,524 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:31:17,524 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:31:17,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:31:17,525 INFO L82 PathProgramCache]: Analyzing trace with hash 809663207, now seen corresponding path program 18 times [2018-10-12 22:31:17,525 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:31:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:31:19,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:31:19,450 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:31:19,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-10-12 22:31:19,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-12 22:31:19,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-12 22:31:19,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2455, Unknown=0, NotChecked=0, Total=2862 [2018-10-12 22:31:19,451 INFO L87 Difference]: Start difference. First operand 268 states and 268 transitions. Second operand 54 states. [2018-10-12 22:31:21,466 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2018-10-12 22:31:22,537 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-12 22:31:22,679 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:31:23,290 WARN L178 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:31:23,435 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:31:23,892 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:31:24,046 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:31:24,482 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:31:24,642 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:31:25,084 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:31:25,246 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:31:25,697 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:31:25,865 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:31:26,327 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:31:26,506 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:31:26,865 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-12 22:31:27,041 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:31:27,222 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:31:27,738 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:31:27,933 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:31:28,433 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:31:28,627 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:31:29,127 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:31:29,325 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:31:29,845 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:31:30,050 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:31:30,573 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:31:30,785 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:31:31,330 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:31:31,545 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-12 22:31:32,160 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-12 22:31:33,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:31:33,464 INFO L93 Difference]: Finished difference Result 290 states and 290 transitions. [2018-10-12 22:31:33,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-12 22:31:33,468 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 267 [2018-10-12 22:31:33,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:31:33,470 INFO L225 Difference]: With dead ends: 290 [2018-10-12 22:31:33,470 INFO L226 Difference]: Without dead ends: 290 [2018-10-12 22:31:33,472 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4448 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=4586, Invalid=15154, Unknown=0, NotChecked=0, Total=19740 [2018-10-12 22:31:33,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-10-12 22:31:33,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 280. [2018-10-12 22:31:33,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-10-12 22:31:33,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 280 transitions. [2018-10-12 22:31:33,477 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 280 transitions. Word has length 267 [2018-10-12 22:31:33,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:31:33,477 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 280 transitions. [2018-10-12 22:31:33,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-12 22:31:33,477 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 280 transitions. [2018-10-12 22:31:33,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-10-12 22:31:33,479 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:31:33,479 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:31:33,479 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:31:33,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:31:33,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1555252431, now seen corresponding path program 19 times [2018-10-12 22:31:33,480 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:31:33,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:31:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:31:35,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:31:35,282 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-10-12 22:31:35,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-12 22:31:35,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-12 22:31:35,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=2597, Unknown=0, NotChecked=0, Total=3080 [2018-10-12 22:31:35,283 INFO L87 Difference]: Start difference. First operand 280 states and 280 transitions. Second operand 56 states. [2018-10-12 22:31:37,948 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-12 22:31:38,516 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:31:39,738 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:31:41,801 WARN L178 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-12 22:31:41,987 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:31:42,166 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:31:47,408 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:31:48,144 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:31:50,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:31:50,238 INFO L93 Difference]: Finished difference Result 302 states and 302 transitions. [2018-10-12 22:31:50,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-12 22:31:50,239 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 279 [2018-10-12 22:31:50,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:31:50,240 INFO L225 Difference]: With dead ends: 302 [2018-10-12 22:31:50,240 INFO L226 Difference]: Without dead ends: 302 [2018-10-12 22:31:50,242 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5089 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=5295, Invalid=16757, Unknown=0, NotChecked=0, Total=22052 [2018-10-12 22:31:50,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2018-10-12 22:31:50,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 292. [2018-10-12 22:31:50,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-10-12 22:31:50,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 292 transitions. [2018-10-12 22:31:50,246 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 292 transitions. Word has length 279 [2018-10-12 22:31:50,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:31:50,246 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 292 transitions. [2018-10-12 22:31:50,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-12 22:31:50,246 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 292 transitions. [2018-10-12 22:31:50,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-10-12 22:31:50,248 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:31:50,248 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:31:50,248 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:31:50,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:31:50,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1744597687, now seen corresponding path program 20 times [2018-10-12 22:31:50,249 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:31:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:31:50,784 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-12 22:31:52,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:31:52,661 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:31:52,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-10-12 22:31:52,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-12 22:31:52,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-12 22:31:52,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=2891, Unknown=0, NotChecked=0, Total=3306 [2018-10-12 22:31:52,663 INFO L87 Difference]: Start difference. First operand 292 states and 292 transitions. Second operand 58 states. [2018-10-12 22:31:55,258 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2018-10-12 22:31:56,586 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-12 22:31:56,734 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2018-10-12 22:31:57,345 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-12 22:31:57,580 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:31:58,170 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:31:58,350 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:31:58,835 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:31:59,024 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:31:59,531 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:31:59,729 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:32:00,240 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:32:00,445 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:32:00,975 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:32:01,188 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:32:01,739 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:32:01,960 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:32:02,567 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:32:02,816 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:32:03,380 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:32:03,614 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:32:04,190 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:32:04,426 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:32:05,017 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:32:05,261 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:32:05,909 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:32:06,151 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-12 22:32:06,762 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-12 22:32:07,002 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-12 22:32:07,439 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-12 22:32:07,728 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-12 22:32:08,195 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2018-10-12 22:32:09,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:32:09,397 INFO L93 Difference]: Finished difference Result 314 states and 314 transitions. [2018-10-12 22:32:09,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-12 22:32:09,398 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 291 [2018-10-12 22:32:09,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:32:09,399 INFO L225 Difference]: With dead ends: 314 [2018-10-12 22:32:09,400 INFO L226 Difference]: Without dead ends: 314 [2018-10-12 22:32:09,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5093 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=4885, Invalid=17765, Unknown=0, NotChecked=0, Total=22650 [2018-10-12 22:32:09,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2018-10-12 22:32:09,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 304. [2018-10-12 22:32:09,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-10-12 22:32:09,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 304 transitions. [2018-10-12 22:32:09,406 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 304 transitions. Word has length 291 [2018-10-12 22:32:09,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:32:09,406 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 304 transitions. [2018-10-12 22:32:09,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-12 22:32:09,407 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 304 transitions. [2018-10-12 22:32:09,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-10-12 22:32:09,408 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:32:09,408 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:32:09,409 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:32:09,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:32:09,409 INFO L82 PathProgramCache]: Analyzing trace with hash -56097633, now seen corresponding path program 21 times [2018-10-12 22:32:09,410 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:32:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:32:11,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:32:11,510 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:32:11,510 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-10-12 22:32:11,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-12 22:32:11,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-12 22:32:11,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=2969, Unknown=0, NotChecked=0, Total=3540 [2018-10-12 22:32:11,511 INFO L87 Difference]: Start difference. First operand 304 states and 304 transitions. Second operand 60 states. [2018-10-12 22:32:14,330 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:32:16,528 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:32:17,741 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:32:17,951 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:32:18,473 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:32:23,465 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:32:27,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:32:27,207 INFO L93 Difference]: Finished difference Result 326 states and 326 transitions. [2018-10-12 22:32:27,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-12 22:32:27,209 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 303 [2018-10-12 22:32:27,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:32:27,212 INFO L225 Difference]: With dead ends: 326 [2018-10-12 22:32:27,212 INFO L226 Difference]: Without dead ends: 326 [2018-10-12 22:32:27,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6048 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=6180, Invalid=19580, Unknown=0, NotChecked=0, Total=25760 [2018-10-12 22:32:27,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2018-10-12 22:32:27,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 316. [2018-10-12 22:32:27,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-10-12 22:32:27,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 316 transitions. [2018-10-12 22:32:27,216 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 316 transitions. Word has length 303 [2018-10-12 22:32:27,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:32:27,217 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 316 transitions. [2018-10-12 22:32:27,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-12 22:32:27,217 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 316 transitions. [2018-10-12 22:32:27,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-10-12 22:32:27,219 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:32:27,219 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:32:27,219 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:32:27,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:32:27,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1178598023, now seen corresponding path program 22 times [2018-10-12 22:32:27,220 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:32:27,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:32:29,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:32:29,584 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:32:29,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-10-12 22:32:29,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-12 22:32:29,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-12 22:32:29,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=3207, Unknown=0, NotChecked=0, Total=3782 [2018-10-12 22:32:29,585 INFO L87 Difference]: Start difference. First operand 316 states and 316 transitions. Second operand 62 states. [2018-10-12 22:32:32,501 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-12 22:32:32,649 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:32:33,130 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:33,300 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:32:33,781 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:33,936 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:32:34,376 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:34,536 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:32:35,080 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:35,246 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:32:35,717 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:35,887 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:32:36,358 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:36,537 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:32:37,030 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:37,218 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:32:37,728 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:37,922 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:32:38,281 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-12 22:32:38,514 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:38,726 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:32:39,256 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:39,460 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:32:39,997 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:40,201 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:32:40,745 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:40,962 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:32:41,522 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:41,743 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:32:42,333 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:42,564 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:32:43,173 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:43,443 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:32:44,055 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:44,293 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:32:44,913 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:32:45,158 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-12 22:32:45,757 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-12 22:32:47,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:32:47,043 INFO L93 Difference]: Finished difference Result 338 states and 338 transitions. [2018-10-12 22:32:47,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-12 22:32:47,044 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 315 [2018-10-12 22:32:47,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:32:47,047 INFO L225 Difference]: With dead ends: 338 [2018-10-12 22:32:47,047 INFO L226 Difference]: Without dead ends: 338 [2018-10-12 22:32:47,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6326 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=6304, Invalid=20756, Unknown=0, NotChecked=0, Total=27060 [2018-10-12 22:32:47,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-10-12 22:32:47,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 328. [2018-10-12 22:32:47,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-10-12 22:32:47,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 328 transitions. [2018-10-12 22:32:47,053 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 328 transitions. Word has length 315 [2018-10-12 22:32:47,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:32:47,054 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 328 transitions. [2018-10-12 22:32:47,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-12 22:32:47,054 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 328 transitions. [2018-10-12 22:32:47,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-10-12 22:32:47,055 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:32:47,056 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:32:47,056 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:32:47,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:32:47,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1900958831, now seen corresponding path program 23 times [2018-10-12 22:32:47,057 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:32:47,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:32:49,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:32:49,863 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:32:49,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-10-12 22:32:49,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-12 22:32:49,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-12 22:32:49,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=667, Invalid=3365, Unknown=0, NotChecked=0, Total=4032 [2018-10-12 22:32:49,864 INFO L87 Difference]: Start difference. First operand 328 states and 328 transitions. Second operand 64 states. [2018-10-12 22:32:52,662 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-12 22:32:53,688 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-12 22:32:53,872 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:32:56,188 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:32:58,792 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:32:59,033 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:33:00,244 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:33:01,693 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:33:02,440 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:33:04,108 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:33:05,733 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:33:08,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:33:08,090 INFO L93 Difference]: Finished difference Result 350 states and 350 transitions. [2018-10-12 22:33:08,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-10-12 22:33:08,091 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 327 [2018-10-12 22:33:08,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:33:08,093 INFO L225 Difference]: With dead ends: 350 [2018-10-12 22:33:08,093 INFO L226 Difference]: Without dead ends: 350 [2018-10-12 22:33:08,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7091 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=7133, Invalid=22623, Unknown=0, NotChecked=0, Total=29756 [2018-10-12 22:33:08,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2018-10-12 22:33:08,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 340. [2018-10-12 22:33:08,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-10-12 22:33:08,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 340 transitions. [2018-10-12 22:33:08,099 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 340 transitions. Word has length 327 [2018-10-12 22:33:08,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:33:08,099 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 340 transitions. [2018-10-12 22:33:08,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-12 22:33:08,100 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 340 transitions. [2018-10-12 22:33:08,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-10-12 22:33:08,101 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:33:08,102 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:33:08,102 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:33:08,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:33:08,102 INFO L82 PathProgramCache]: Analyzing trace with hash 727519831, now seen corresponding path program 24 times [2018-10-12 22:33:08,103 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:33:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:33:10,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:33:10,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:33:10,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-10-12 22:33:10,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-12 22:33:10,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-12 22:33:10,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=3859, Unknown=0, NotChecked=0, Total=4290 [2018-10-12 22:33:10,789 INFO L87 Difference]: Start difference. First operand 340 states and 340 transitions. Second operand 66 states. [2018-10-12 22:33:14,565 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-12 22:33:14,732 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2018-10-12 22:33:15,302 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2018-10-12 22:33:15,488 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 49 [2018-10-12 22:33:16,090 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 49 [2018-10-12 22:33:16,290 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 49 [2018-10-12 22:33:16,910 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 49 [2018-10-12 22:33:17,127 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 49 [2018-10-12 22:33:17,775 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 49 [2018-10-12 22:33:18,004 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 49 [2018-10-12 22:33:18,378 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 49 [2018-10-12 22:33:18,701 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 56 [2018-10-12 22:33:18,967 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-12 22:33:19,165 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-12 22:33:19,446 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-12 22:33:19,721 WARN L178 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-12 22:33:19,982 WARN L178 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-12 22:33:20,167 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-12 22:33:20,360 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-12 22:33:20,624 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-12 22:33:20,887 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-12 22:33:21,095 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-12 22:33:21,297 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-12 22:33:21,567 WARN L178 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-12 22:33:21,840 WARN L178 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-12 22:33:22,040 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-12 22:33:22,244 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-12 22:33:22,521 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-12 22:33:22,801 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-12 22:33:22,999 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-12 22:33:23,203 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-12 22:33:23,476 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-12 22:33:23,767 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-12 22:33:23,972 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-12 22:33:24,181 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-12 22:33:24,496 WARN L178 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-12 22:33:24,816 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-12 22:33:25,029 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-12 22:33:25,244 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-12 22:33:25,528 WARN L178 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-12 22:33:25,831 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 58 [2018-10-12 22:33:26,048 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2018-10-12 22:33:26,260 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2018-10-12 22:33:26,548 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 57 [2018-10-12 22:33:26,840 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 58 [2018-10-12 22:33:27,056 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2018-10-12 22:33:27,364 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 57 [2018-10-12 22:33:27,659 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 58 [2018-10-12 22:33:27,865 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 50 [2018-10-12 22:33:28,176 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 57 [2018-10-12 22:33:28,454 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2018-10-12 22:33:28,945 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2018-10-12 22:33:29,203 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2018-10-12 22:33:29,733 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2018-10-12 22:33:29,977 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2018-10-12 22:33:30,430 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2018-10-12 22:33:30,684 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2018-10-12 22:33:32,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:33:32,392 INFO L93 Difference]: Finished difference Result 362 states and 362 transitions. [2018-10-12 22:33:32,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-12 22:33:32,393 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 339 [2018-10-12 22:33:32,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:33:32,394 INFO L225 Difference]: With dead ends: 362 [2018-10-12 22:33:32,394 INFO L226 Difference]: Without dead ends: 362 [2018-10-12 22:33:32,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6491 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=5471, Invalid=23599, Unknown=0, NotChecked=0, Total=29070 [2018-10-12 22:33:32,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2018-10-12 22:33:32,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 352. [2018-10-12 22:33:32,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-10-12 22:33:32,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 352 transitions. [2018-10-12 22:33:32,399 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 352 transitions. Word has length 339 [2018-10-12 22:33:32,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:33:32,400 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 352 transitions. [2018-10-12 22:33:32,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-12 22:33:32,400 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 352 transitions. [2018-10-12 22:33:32,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-10-12 22:33:32,402 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:33:32,402 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:33:32,402 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:33:32,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:33:32,403 INFO L82 PathProgramCache]: Analyzing trace with hash 586560575, now seen corresponding path program 25 times [2018-10-12 22:33:32,403 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:33:32,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:33:36,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:33:36,047 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:33:36,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-10-12 22:33:36,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-12 22:33:36,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-12 22:33:36,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=771, Invalid=3785, Unknown=0, NotChecked=0, Total=4556 [2018-10-12 22:33:36,049 INFO L87 Difference]: Start difference. First operand 352 states and 352 transitions. Second operand 68 states. [2018-10-12 22:33:39,611 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:33:39,810 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:33:40,283 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:33:41,422 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:33:44,561 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:33:44,745 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:33:46,054 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:33:46,781 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:33:48,265 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:33:50,027 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:33:50,668 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:33:51,507 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:33:52,350 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:33:54,931 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:33:55,230 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2018-10-12 22:33:56,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:33:56,619 INFO L93 Difference]: Finished difference Result 374 states and 374 transitions. [2018-10-12 22:33:56,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-10-12 22:33:56,620 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 351 [2018-10-12 22:33:56,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:33:56,622 INFO L225 Difference]: With dead ends: 374 [2018-10-12 22:33:56,622 INFO L226 Difference]: Without dead ends: 374 [2018-10-12 22:33:56,625 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8218 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=8154, Invalid=25886, Unknown=0, NotChecked=0, Total=34040 [2018-10-12 22:33:56,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2018-10-12 22:33:56,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 364. [2018-10-12 22:33:56,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-10-12 22:33:56,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 364 transitions. [2018-10-12 22:33:56,630 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 364 transitions. Word has length 351 [2018-10-12 22:33:56,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:33:56,630 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 364 transitions. [2018-10-12 22:33:56,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-12 22:33:56,630 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 364 transitions. [2018-10-12 22:33:56,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-10-12 22:33:56,632 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:33:56,632 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:33:56,633 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:33:56,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:33:56,633 INFO L82 PathProgramCache]: Analyzing trace with hash -2019313113, now seen corresponding path program 26 times [2018-10-12 22:33:56,634 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:33:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:33:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:33:59,216 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:33:59,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-10-12 22:33:59,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-12 22:33:59,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-12 22:33:59,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=775, Invalid=4055, Unknown=0, NotChecked=0, Total=4830 [2018-10-12 22:33:59,217 INFO L87 Difference]: Start difference. First operand 364 states and 364 transitions. Second operand 70 states. [2018-10-12 22:34:01,717 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-12 22:34:01,863 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:02,312 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:02,457 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:02,889 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:03,042 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:03,498 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:03,655 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:04,156 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:04,319 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:04,791 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:04,966 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:05,291 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-12 22:34:05,470 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:05,670 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:06,164 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:06,346 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:06,854 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:07,043 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:07,551 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:07,750 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:08,277 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:08,485 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:09,036 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:09,248 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:09,796 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:10,006 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:10,638 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:10,887 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:11,477 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:11,703 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:12,293 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:12,526 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:13,123 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:13,364 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:13,980 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:14,234 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:14,861 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:15,138 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:15,573 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-12 22:34:15,853 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:16,121 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:16,777 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:17,042 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:34:17,695 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:34:17,957 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-12 22:34:18,607 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-12 22:34:20,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:34:20,045 INFO L93 Difference]: Finished difference Result 386 states and 386 transitions. [2018-10-12 22:34:20,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-10-12 22:34:20,045 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 363 [2018-10-12 22:34:20,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:34:20,047 INFO L225 Difference]: With dead ends: 386 [2018-10-12 22:34:20,048 INFO L226 Difference]: Without dead ends: 386 [2018-10-12 22:34:20,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8540 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=8294, Invalid=27238, Unknown=0, NotChecked=0, Total=35532 [2018-10-12 22:34:20,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2018-10-12 22:34:20,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 376. [2018-10-12 22:34:20,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2018-10-12 22:34:20,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 376 transitions. [2018-10-12 22:34:20,054 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 376 transitions. Word has length 363 [2018-10-12 22:34:20,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:34:20,055 INFO L481 AbstractCegarLoop]: Abstraction has 376 states and 376 transitions. [2018-10-12 22:34:20,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-12 22:34:20,055 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 376 transitions. [2018-10-12 22:34:20,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-10-12 22:34:20,057 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:34:20,057 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:34:20,057 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:34:20,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:34:20,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1980783601, now seen corresponding path program 27 times [2018-10-12 22:34:20,058 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:34:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:34:23,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:34:23,345 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:34:23,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-10-12 22:34:23,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-12 22:34:23,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-12 22:34:23,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=883, Invalid=4229, Unknown=0, NotChecked=0, Total=5112 [2018-10-12 22:34:23,347 INFO L87 Difference]: Start difference. First operand 376 states and 376 transitions. Second operand 72 states. [2018-10-12 22:34:28,197 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:34:34,054 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:34:35,524 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:34:36,151 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-12 22:34:41,332 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:34:43,174 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:34:44,093 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:34:45,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:34:45,763 INFO L93 Difference]: Finished difference Result 398 states and 398 transitions. [2018-10-12 22:34:45,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-12 22:34:45,763 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 375 [2018-10-12 22:34:45,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:34:45,765 INFO L225 Difference]: With dead ends: 398 [2018-10-12 22:34:45,765 INFO L226 Difference]: Without dead ends: 398 [2018-10-12 22:34:45,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9429 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=9243, Invalid=29369, Unknown=0, NotChecked=0, Total=38612 [2018-10-12 22:34:45,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2018-10-12 22:34:45,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 388. [2018-10-12 22:34:45,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-10-12 22:34:45,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 388 transitions. [2018-10-12 22:34:45,773 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 388 transitions. Word has length 375 [2018-10-12 22:34:45,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:34:45,773 INFO L481 AbstractCegarLoop]: Abstraction has 388 states and 388 transitions. [2018-10-12 22:34:45,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-12 22:34:45,773 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 388 transitions. [2018-10-12 22:34:45,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-10-12 22:34:45,775 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:34:45,776 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:34:45,776 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:34:45,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:34:45,776 INFO L82 PathProgramCache]: Analyzing trace with hash -614206985, now seen corresponding path program 28 times [2018-10-12 22:34:45,777 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:34:45,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:34:48,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:34:48,932 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:34:48,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-10-12 22:34:48,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-12 22:34:48,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-12 22:34:48,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=4619, Unknown=0, NotChecked=0, Total=5402 [2018-10-12 22:34:48,934 INFO L87 Difference]: Start difference. First operand 388 states and 388 transitions. Second operand 74 states. [2018-10-12 22:34:51,664 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2018-10-12 22:34:52,301 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-12 22:34:52,452 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2018-10-12 22:34:52,965 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-12 22:34:53,145 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:34:53,660 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:34:53,841 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:34:54,346 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:34:54,535 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:34:55,055 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:34:55,244 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:34:55,782 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:34:55,987 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:34:56,580 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:34:56,823 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:34:57,380 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:34:57,596 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:34:58,167 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:34:58,385 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:34:58,973 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:34:59,205 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:34:59,810 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:35:00,051 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:35:00,657 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:35:00,907 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:35:01,510 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:35:01,796 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:35:02,459 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:35:02,749 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:35:03,447 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:35:03,717 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:35:04,392 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:35:04,668 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:35:05,348 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:35:05,626 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:35:06,329 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:35:06,634 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:35:06,934 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-12 22:35:07,463 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:35:07,768 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:35:08,475 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:35:08,785 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 22:35:09,536 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 22:35:09,842 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-12 22:35:10,561 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-12 22:35:10,846 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-12 22:35:11,397 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-12 22:35:11,690 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-12 22:35:11,952 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2018-10-12 22:35:12,276 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2018-10-12 22:35:13,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:35:13,786 INFO L93 Difference]: Finished difference Result 410 states and 410 transitions. [2018-10-12 22:35:13,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-12 22:35:13,787 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 387 [2018-10-12 22:35:13,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:35:13,788 INFO L225 Difference]: With dead ends: 410 [2018-10-12 22:35:13,789 INFO L226 Difference]: Without dead ends: 410 [2018-10-12 22:35:13,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9425 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=8673, Invalid=30729, Unknown=0, NotChecked=0, Total=39402 [2018-10-12 22:35:13,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2018-10-12 22:35:13,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 400. [2018-10-12 22:35:13,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2018-10-12 22:35:13,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 400 transitions. [2018-10-12 22:35:13,796 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 400 transitions. Word has length 387 [2018-10-12 22:35:13,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:35:13,797 INFO L481 AbstractCegarLoop]: Abstraction has 400 states and 400 transitions. [2018-10-12 22:35:13,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-12 22:35:13,797 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 400 transitions. [2018-10-12 22:35:13,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-10-12 22:35:13,799 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:35:13,799 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:35:13,800 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:35:13,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:35:13,800 INFO L82 PathProgramCache]: Analyzing trace with hash 780837855, now seen corresponding path program 29 times [2018-10-12 22:35:13,801 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:35:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:35:16,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 5017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:35:16,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:35:16,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-10-12 22:35:16,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-12 22:35:16,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-12 22:35:16,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1003, Invalid=4697, Unknown=0, NotChecked=0, Total=5700 [2018-10-12 22:35:16,932 INFO L87 Difference]: Start difference. First operand 400 states and 400 transitions. Second operand 76 states. [2018-10-12 22:35:20,834 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:35:21,385 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:35:21,958 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:35:22,112 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:35:22,292 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-12 22:35:22,659 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:35:23,262 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:35:27,253 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:35:27,471 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:35:28,057 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:35:29,755 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:35:31,127 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:35:31,367 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:35:31,961 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:35:32,421 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-12 22:35:32,670 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-12 22:35:32,889 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:35:35,482 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:35:37,616 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:35:41,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:35:41,939 INFO L93 Difference]: Finished difference Result 422 states and 422 transitions. [2018-10-12 22:35:41,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-10-12 22:35:41,940 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 399 [2018-10-12 22:35:41,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:35:41,942 INFO L225 Difference]: With dead ends: 422 [2018-10-12 22:35:41,942 INFO L226 Difference]: Without dead ends: 422 [2018-10-12 22:35:41,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10724 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=10400, Invalid=33072, Unknown=0, NotChecked=0, Total=43472 [2018-10-12 22:35:41,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2018-10-12 22:35:41,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 412. [2018-10-12 22:35:41,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-10-12 22:35:41,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 412 transitions. [2018-10-12 22:35:41,949 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 412 transitions. Word has length 399 [2018-10-12 22:35:41,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:35:41,949 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 412 transitions. [2018-10-12 22:35:41,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-12 22:35:41,950 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 412 transitions. [2018-10-12 22:35:41,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-10-12 22:35:41,951 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:35:41,952 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:35:41,952 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:35:41,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:35:41,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1225934393, now seen corresponding path program 30 times [2018-10-12 22:35:41,953 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:35:41,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:35:42,731 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-12 22:35:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:35:45,753 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:35:45,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-10-12 22:35:45,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-12 22:35:45,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-12 22:35:45,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1007, Invalid=4999, Unknown=0, NotChecked=0, Total=6006 [2018-10-12 22:35:45,755 INFO L87 Difference]: Start difference. First operand 412 states and 412 transitions. Second operand 78 states. [2018-10-12 22:35:48,727 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-12 22:35:48,873 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:35:49,362 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:49,505 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:35:49,961 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:50,123 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:35:50,582 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:50,743 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:35:51,216 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:51,377 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:35:51,866 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:52,036 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:35:52,532 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:52,718 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:35:53,273 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:53,459 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:35:53,975 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:54,166 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:35:54,716 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:54,924 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:35:55,470 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:55,674 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:35:56,229 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:56,434 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:35:56,999 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:57,212 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:35:57,799 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:58,036 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:35:58,283 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-12 22:35:58,689 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:58,921 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:35:59,537 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:35:59,776 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:36:00,409 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:36:00,647 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:36:01,275 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:36:01,520 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:36:02,156 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:36:02,408 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:36:03,068 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:36:03,365 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:36:04,018 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:36:04,277 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:36:04,937 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:36:05,213 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:36:05,893 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:36:06,180 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:36:06,896 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:36:07,219 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:36:07,923 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:36:08,233 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 22:36:08,991 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 22:36:09,288 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-12 22:36:09,999 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-12 22:36:11,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:36:11,591 INFO L93 Difference]: Finished difference Result 434 states and 434 transitions. [2018-10-12 22:36:11,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-10-12 22:36:11,591 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 411 [2018-10-12 22:36:11,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:36:11,593 INFO L225 Difference]: With dead ends: 434 [2018-10-12 22:36:11,593 INFO L226 Difference]: Without dead ends: 434 [2018-10-12 22:36:11,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11090 ImplicationChecksByTransitivity, 26.9s TimeCoverageRelationStatistics Valid=10556, Invalid=34600, Unknown=0, NotChecked=0, Total=45156 [2018-10-12 22:36:11,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-10-12 22:36:11,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 424. [2018-10-12 22:36:11,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-10-12 22:36:11,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 424 transitions. [2018-10-12 22:36:11,600 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 424 transitions. Word has length 411 [2018-10-12 22:36:11,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:36:11,600 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 424 transitions. [2018-10-12 22:36:11,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-12 22:36:11,600 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 424 transitions. [2018-10-12 22:36:11,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-10-12 22:36:11,603 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:36:11,603 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:36:11,603 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:36:11,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:36:11,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1458097233, now seen corresponding path program 31 times [2018-10-12 22:36:11,604 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:36:11,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:36:15,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:36:15,330 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:36:15,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-12 22:36:15,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-12 22:36:15,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-12 22:36:15,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1131, Invalid=5189, Unknown=0, NotChecked=0, Total=6320 [2018-10-12 22:36:15,332 INFO L87 Difference]: Start difference. First operand 424 states and 424 transitions. Second operand 80 states. [2018-10-12 22:36:18,731 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-12 22:36:18,877 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:36:23,605 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:36:23,817 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:36:28,000 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:36:28,797 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:36:30,422 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:36:32,298 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:36:33,777 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 22:36:34,075 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 22:36:42,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 22:36:42,224 INFO L93 Difference]: Finished difference Result 446 states and 446 transitions. [2018-10-12 22:36:42,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-10-12 22:36:42,224 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 423 [2018-10-12 22:36:42,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 22:36:42,226 INFO L225 Difference]: With dead ends: 446 [2018-10-12 22:36:42,226 INFO L226 Difference]: Without dead ends: 446 [2018-10-12 22:36:42,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12103 ImplicationChecksByTransitivity, 26.9s TimeCoverageRelationStatistics Valid=11625, Invalid=36995, Unknown=0, NotChecked=0, Total=48620 [2018-10-12 22:36:42,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2018-10-12 22:36:42,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 436. [2018-10-12 22:36:42,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2018-10-12 22:36:42,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 436 transitions. [2018-10-12 22:36:42,235 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 436 transitions. Word has length 423 [2018-10-12 22:36:42,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 22:36:42,235 INFO L481 AbstractCegarLoop]: Abstraction has 436 states and 436 transitions. [2018-10-12 22:36:42,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-12 22:36:42,236 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 436 transitions. [2018-10-12 22:36:42,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-10-12 22:36:42,238 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 22:36:42,238 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 22:36:42,239 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 22:36:42,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 22:36:42,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1164897897, now seen corresponding path program 32 times [2018-10-12 22:36:42,240 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 22:36:42,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 22:36:47,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 0 proven. 6112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 22:36:47,153 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 22:36:47,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-12 22:36:47,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-12 22:36:47,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-12 22:36:47,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=6090, Unknown=0, NotChecked=0, Total=6320 [2018-10-12 22:36:47,155 INFO L87 Difference]: Start difference. First operand 436 states and 436 transitions. Second operand 80 states.