java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplTransformed.xml -s ../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf -i ../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_true-valid-memsafety.i_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b8f97f7-m [2018-10-10 16:20:50,320 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-10 16:20:50,322 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-10 16:20:50,341 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-10 16:20:50,342 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-10 16:20:50,343 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-10 16:20:50,344 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-10 16:20:50,347 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-10 16:20:50,350 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-10 16:20:50,359 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-10 16:20:50,360 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-10 16:20:50,360 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-10 16:20:50,361 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-10 16:20:50,366 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-10 16:20:50,367 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-10 16:20:50,368 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-10 16:20:50,371 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-10 16:20:50,372 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-10 16:20:50,379 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-10 16:20:50,380 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-10 16:20:50,383 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-10 16:20:50,385 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-10 16:20:50,390 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-10 16:20:50,390 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-10 16:20:50,390 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-10 16:20:50,391 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-10 16:20:50,392 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-10 16:20:50,393 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-10 16:20:50,394 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-10 16:20:50,395 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-10 16:20:50,395 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-10 16:20:50,397 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-10 16:20:50,398 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-10 16:20:50,399 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-10 16:20:50,400 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-10 16:20:50,402 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-10 16:20:50,402 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf [2018-10-10 16:20:50,419 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-10 16:20:50,420 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-10 16:20:50,420 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-10 16:20:50,423 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-10 16:20:50,424 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-10 16:20:50,424 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-10 16:20:50,425 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-10 16:20:50,425 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-10 16:20:50,425 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-10 16:20:50,425 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-10 16:20:50,426 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-10 16:20:50,426 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-10 16:20:50,426 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-10 16:20:50,428 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-10 16:20:50,428 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-10 16:20:50,490 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-10 16:20:50,505 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-10 16:20:50,513 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-10 16:20:50,515 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-10 16:20:50,516 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-10 16:20:50,516 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_true-valid-memsafety.i_5.bpl [2018-10-10 16:20:50,517 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_true-valid-memsafety.i_5.bpl' [2018-10-10 16:20:50,581 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-10 16:20:50,583 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-10 16:20:50,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-10 16:20:50,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-10 16:20:50,584 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-10 16:20:50,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 04:20:50" (1/1) ... [2018-10-10 16:20:50,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 04:20:50" (1/1) ... [2018-10-10 16:20:50,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 04:20:50" (1/1) ... [2018-10-10 16:20:50,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 04:20:50" (1/1) ... [2018-10-10 16:20:50,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 04:20:50" (1/1) ... [2018-10-10 16:20:50,635 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 04:20:50" (1/1) ... [2018-10-10 16:20:50,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 04:20:50" (1/1) ... [2018-10-10 16:20:50,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-10 16:20:50,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-10 16:20:50,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-10 16:20:50,639 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-10 16:20:50,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 04:20:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-10 16:20:50,709 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-10 16:20:50,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-10 16:20:50,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-10 16:20:51,175 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-10 16:20:51,176 INFO L202 PluginConnector]: Adding new model 960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 04:20:51 BoogieIcfgContainer [2018-10-10 16:20:51,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-10 16:20:51,177 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2018-10-10 16:20:51,177 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2018-10-10 16:20:51,178 INFO L276 PluginConnector]: IcfgTransformer initialized [2018-10-10 16:20:51,182 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 04:20:51" (1/1) ... [2018-10-10 16:20:51,191 INFO L137 apSepIcfgTransformer]: HeapSepIcfgTransformer: Starting heap partitioning [2018-10-10 16:20:51,191 INFO L138 apSepIcfgTransformer]: To be partitioned heap arrays found [#memory_int] [2018-10-10 16:20:51,228 INFO L191 apSepIcfgTransformer]: Heap separator: starting loc-array-style preprocessing [2018-10-10 16:20:51,280 INFO L217 apSepIcfgTransformer]: finished MemlocArrayUpdater [2018-10-10 16:20:51,295 INFO L280 apSepIcfgTransformer]: finished preprocessing for the equality analysis [2018-10-10 16:20:51,359 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=1) [2018-10-10 16:21:22,766 INFO L315 AbstractInterpreter]: Visited 61 different actions 87 times. Merged at 14 different actions 24 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-10-10 16:21:22,768 INFO L304 apSepIcfgTransformer]: finished equality analysis [2018-10-10 16:21:22,771 INFO L316 apSepIcfgTransformer]: Finished detection of select terms ("array reads") [2018-10-10 16:21:22,811 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;) [2018-10-10 16:21:22,848 INFO L232 HeapPartitionManager]: partitioning result: [2018-10-10 16:21:22,849 INFO L237 HeapPartitionManager]: location blocks for array group [#memory_int, ULTIMATE.start_write~int_old_#memory_int] [2018-10-10 16:21:22,849 INFO L246 HeapPartitionManager]: at dimension 1 [2018-10-10 16:21:22,849 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 3 [2018-10-10 16:21:22,849 INFO L248 HeapPartitionManager]: # location blocks :2 [2018-10-10 16:21:22,849 INFO L246 HeapPartitionManager]: at dimension 2 [2018-10-10 16:21:22,849 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 0 [2018-10-10 16:21:22,850 INFO L248 HeapPartitionManager]: # location blocks :0 [2018-10-10 16:21:22,850 INFO L237 HeapPartitionManager]: location blocks for array group [#memory_int, ULTIMATE.start_write~int_old_#memory_int] [2018-10-10 16:21:22,850 INFO L246 HeapPartitionManager]: at dimension 1 [2018-10-10 16:21:22,850 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 3 [2018-10-10 16:21:22,850 INFO L248 HeapPartitionManager]: # location blocks :2 [2018-10-10 16:21:22,850 INFO L246 HeapPartitionManager]: at dimension 2 [2018-10-10 16:21:22,850 INFO L247 HeapPartitionManager]: # array writes (possibly including 1 dummy write/NoStoreIndexInfo) : 0 [2018-10-10 16:21:22,851 INFO L248 HeapPartitionManager]: # location blocks :0 [2018-10-10 16:21:22,852 INFO L145 ransitionTransformer]: executing heap partitioning transformation [2018-10-10 16:21:22,867 INFO L202 PluginConnector]: Adding new model 960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.10 04:21:22 BasicIcfg [2018-10-10 16:21:22,867 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2018-10-10 16:21:22,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-10 16:21:22,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-10 16:21:22,873 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-10 16:21:22,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 04:20:50" (1/3) ... [2018-10-10 16:21:22,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d945748 and model type 960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 04:21:22, skipping insertion in model container [2018-10-10 16:21:22,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 04:20:51" (2/3) ... [2018-10-10 16:21:22,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d945748 and model type 960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.10 04:21:22, skipping insertion in model container [2018-10-10 16:21:22,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.10 04:21:22" (3/3) ... [2018-10-10 16:21:22,876 INFO L112 eAbstractionObserver]: Analyzing ICFG memPartitionedIcfg [2018-10-10 16:21:22,886 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-10-10 16:21:22,894 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-10 16:21:22,912 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-10 16:21:22,936 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-10 16:21:22,937 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-10 16:21:22,937 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-10 16:21:22,938 INFO L384 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-10-10 16:21:22,938 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-10 16:21:22,938 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-10 16:21:22,939 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-10 16:21:22,939 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-10 16:21:22,939 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-10 16:21:22,952 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2018-10-10 16:21:22,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-10 16:21:22,962 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:21:22,963 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] [2018-10-10 16:21:22,964 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:21:22,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:21:22,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1565987991, now seen corresponding path program 1 times [2018-10-10 16:21:23,023 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:21:23,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:21:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:21:24,212 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-10 16:21:24,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2018-10-10 16:21:24,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-10 16:21:24,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-10 16:21:24,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-10-10 16:21:24,231 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 14 states. [2018-10-10 16:21:25,050 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-10-10 16:21:25,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:21:25,760 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-10 16:21:25,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-10 16:21:25,761 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2018-10-10 16:21:25,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:21:25,771 INFO L225 Difference]: With dead ends: 74 [2018-10-10 16:21:25,771 INFO L226 Difference]: Without dead ends: 74 [2018-10-10 16:21:25,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2018-10-10 16:21:25,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-10 16:21:25,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2018-10-10 16:21:25,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-10 16:21:25,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-10 16:21:25,813 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 51 [2018-10-10 16:21:25,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:21:25,813 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-10 16:21:25,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-10 16:21:25,814 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-10 16:21:25,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-10 16:21:25,816 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:21:25,816 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] [2018-10-10 16:21:25,816 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:21:25,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:21:25,817 INFO L82 PathProgramCache]: Analyzing trace with hash -725690753, now seen corresponding path program 1 times [2018-10-10 16:21:25,818 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:21:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:21:26,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:21:26,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:21:26,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-10 16:21:26,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-10 16:21:26,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-10 16:21:26,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2018-10-10 16:21:26,359 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 17 states. [2018-10-10 16:21:27,789 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-10 16:21:28,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:21:28,027 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-10 16:21:28,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-10 16:21:28,029 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2018-10-10 16:21:28,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:21:28,032 INFO L225 Difference]: With dead ends: 86 [2018-10-10 16:21:28,032 INFO L226 Difference]: Without dead ends: 86 [2018-10-10 16:21:28,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=388, Invalid=1094, Unknown=0, NotChecked=0, Total=1482 [2018-10-10 16:21:28,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-10 16:21:28,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2018-10-10 16:21:28,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-10 16:21:28,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-10 16:21:28,042 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 63 [2018-10-10 16:21:28,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:21:28,043 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-10 16:21:28,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-10 16:21:28,043 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-10 16:21:28,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-10 16:21:28,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:21:28,046 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] [2018-10-10 16:21:28,046 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:21:28,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:21:28,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1481309287, now seen corresponding path program 2 times [2018-10-10 16:21:28,047 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:21:28,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:21:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:21:28,658 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:21:28,658 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-10 16:21:28,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-10 16:21:28,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-10 16:21:28,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2018-10-10 16:21:28,659 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 20 states. [2018-10-10 16:21:29,441 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2018-10-10 16:21:30,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:21:30,497 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-10 16:21:30,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-10 16:21:30,498 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2018-10-10 16:21:30,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:21:30,500 INFO L225 Difference]: With dead ends: 98 [2018-10-10 16:21:30,500 INFO L226 Difference]: Without dead ends: 98 [2018-10-10 16:21:30,501 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 [2018-10-10 16:21:30,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-10 16:21:30,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2018-10-10 16:21:30,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-10 16:21:30,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-10 16:21:30,509 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 75 [2018-10-10 16:21:30,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:21:30,510 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-10 16:21:30,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-10 16:21:30,510 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-10 16:21:30,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-10 16:21:30,511 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:21:30,512 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] [2018-10-10 16:21:30,512 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:21:30,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:21:30,512 INFO L82 PathProgramCache]: Analyzing trace with hash 8750671, now seen corresponding path program 3 times [2018-10-10 16:21:30,513 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:21:30,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:21:30,979 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:21:30,979 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:21:30,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-10 16:21:30,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-10 16:21:30,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-10 16:21:30,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2018-10-10 16:21:30,981 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 22 states. [2018-10-10 16:21:33,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:21:33,752 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-10 16:21:33,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-10 16:21:33,753 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 87 [2018-10-10 16:21:33,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:21:33,756 INFO L225 Difference]: With dead ends: 110 [2018-10-10 16:21:33,756 INFO L226 Difference]: Without dead ends: 110 [2018-10-10 16:21:33,757 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 [2018-10-10 16:21:33,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-10 16:21:33,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2018-10-10 16:21:33,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-10 16:21:33,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-10 16:21:33,770 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 87 [2018-10-10 16:21:33,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:21:33,770 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-10 16:21:33,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-10 16:21:33,771 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-10 16:21:33,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-10 16:21:33,772 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:21:33,772 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] [2018-10-10 16:21:33,772 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:21:33,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:21:33,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1727558711, now seen corresponding path program 4 times [2018-10-10 16:21:33,774 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:21:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:21:34,368 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:21:34,368 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:21:34,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-10 16:21:34,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-10 16:21:34,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-10 16:21:34,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2018-10-10 16:21:34,370 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 24 states. [2018-10-10 16:21:36,798 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2018-10-10 16:21:37,181 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2018-10-10 16:21:37,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:21:37,279 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-10-10 16:21:37,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-10 16:21:37,280 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 99 [2018-10-10 16:21:37,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:21:37,281 INFO L225 Difference]: With dead ends: 122 [2018-10-10 16:21:37,282 INFO L226 Difference]: Without dead ends: 122 [2018-10-10 16:21:37,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=623, Invalid=2347, Unknown=0, NotChecked=0, Total=2970 [2018-10-10 16:21:37,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-10 16:21:37,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 112. [2018-10-10 16:21:37,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-10 16:21:37,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-10 16:21:37,300 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 99 [2018-10-10 16:21:37,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:21:37,300 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-10 16:21:37,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-10 16:21:37,300 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-10 16:21:37,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-10 16:21:37,304 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:21:37,304 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] [2018-10-10 16:21:37,305 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:21:37,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:21:37,305 INFO L82 PathProgramCache]: Analyzing trace with hash 640534047, now seen corresponding path program 5 times [2018-10-10 16:21:37,306 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:21:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:21:38,423 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:21:38,424 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:21:38,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-10 16:21:38,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-10 16:21:38,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-10 16:21:38,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2018-10-10 16:21:38,425 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 28 states. [2018-10-10 16:21:40,077 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-10 16:21:40,229 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:21:40,622 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:21:40,775 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:21:42,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:21:42,017 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-10-10 16:21:42,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-10 16:21:42,018 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 111 [2018-10-10 16:21:42,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:21:42,020 INFO L225 Difference]: With dead ends: 134 [2018-10-10 16:21:42,020 INFO L226 Difference]: Without dead ends: 134 [2018-10-10 16:21:42,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1004, Invalid=3156, Unknown=0, NotChecked=0, Total=4160 [2018-10-10 16:21:42,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-10 16:21:42,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 124. [2018-10-10 16:21:42,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-10 16:21:42,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-10-10 16:21:42,031 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 111 [2018-10-10 16:21:42,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:21:42,031 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-10-10 16:21:42,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-10 16:21:42,031 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-10-10 16:21:42,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-10 16:21:42,035 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:21:42,035 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] [2018-10-10 16:21:42,035 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:21:42,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:21:42,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1504672775, now seen corresponding path program 6 times [2018-10-10 16:21:42,036 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:21:42,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:21:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:21:42,717 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:21:42,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-10-10 16:21:42,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-10 16:21:42,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-10 16:21:42,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2018-10-10 16:21:42,719 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 30 states. [2018-10-10 16:21:45,195 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-10 16:21:45,531 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:21:45,839 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-10 16:21:45,985 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:21:46,129 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-10 16:21:46,524 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-10 16:21:47,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:21:47,322 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-10-10 16:21:47,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-10 16:21:47,323 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 123 [2018-10-10 16:21:47,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:21:47,324 INFO L225 Difference]: With dead ends: 146 [2018-10-10 16:21:47,325 INFO L226 Difference]: Without dead ends: 146 [2018-10-10 16:21:47,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1064, Invalid=3628, Unknown=0, NotChecked=0, Total=4692 [2018-10-10 16:21:47,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-10 16:21:47,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 136. [2018-10-10 16:21:47,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-10 16:21:47,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-10-10 16:21:47,337 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 123 [2018-10-10 16:21:47,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:21:47,338 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-10-10 16:21:47,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-10 16:21:47,338 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-10-10 16:21:47,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-10 16:21:47,340 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:21:47,340 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] [2018-10-10 16:21:47,340 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:21:47,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:21:47,341 INFO L82 PathProgramCache]: Analyzing trace with hash 503813615, now seen corresponding path program 7 times [2018-10-10 16:21:47,341 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:21:47,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:21:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:21:48,855 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:21:48,855 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-10 16:21:48,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-10 16:21:48,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-10 16:21:48,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2018-10-10 16:21:48,856 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 32 states. [2018-10-10 16:21:49,536 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-10 16:21:50,806 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-10 16:21:51,327 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:21:51,833 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:21:52,424 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:21:52,966 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:21:53,677 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2018-10-10 16:21:54,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:21:54,330 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-10-10 16:21:54,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-10 16:21:54,331 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 135 [2018-10-10 16:21:54,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:21:54,333 INFO L225 Difference]: With dead ends: 158 [2018-10-10 16:21:54,333 INFO L226 Difference]: Without dead ends: 158 [2018-10-10 16:21:54,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1413, Invalid=4439, Unknown=0, NotChecked=0, Total=5852 [2018-10-10 16:21:54,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-10 16:21:54,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2018-10-10 16:21:54,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-10 16:21:54,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-10 16:21:54,341 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 135 [2018-10-10 16:21:54,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:21:54,341 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-10 16:21:54,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-10 16:21:54,342 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-10 16:21:54,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-10 16:21:54,343 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:21:54,343 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] [2018-10-10 16:21:54,343 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:21:54,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:21:54,344 INFO L82 PathProgramCache]: Analyzing trace with hash 281023447, now seen corresponding path program 8 times [2018-10-10 16:21:54,344 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:21:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:21:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:21:55,205 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:21:55,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-10 16:21:55,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-10 16:21:55,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-10 16:21:55,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2018-10-10 16:21:55,206 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 32 states. [2018-10-10 16:22:00,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:22:00,677 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2018-10-10 16:22:00,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-10 16:22:00,677 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 147 [2018-10-10 16:22:00,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:22:00,679 INFO L225 Difference]: With dead ends: 170 [2018-10-10 16:22:00,679 INFO L226 Difference]: Without dead ends: 170 [2018-10-10 16:22:00,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=927, Invalid=4623, Unknown=0, NotChecked=0, Total=5550 [2018-10-10 16:22:00,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-10 16:22:00,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2018-10-10 16:22:00,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-10 16:22:00,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-10-10 16:22:00,685 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 147 [2018-10-10 16:22:00,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:22:00,685 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-10-10 16:22:00,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-10 16:22:00,685 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-10-10 16:22:00,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-10 16:22:00,687 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:22:00,687 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] [2018-10-10 16:22:00,688 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:22:00,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:22:00,688 INFO L82 PathProgramCache]: Analyzing trace with hash -798820929, now seen corresponding path program 9 times [2018-10-10 16:22:00,689 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:22:00,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:22:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:22:01,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:22:01,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-10-10 16:22:01,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-10 16:22:01,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-10 16:22:01,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2018-10-10 16:22:01,503 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 36 states. [2018-10-10 16:22:03,429 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-10 16:22:04,642 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:22:05,581 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:22:07,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:22:07,636 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2018-10-10 16:22:07,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-10 16:22:07,636 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 159 [2018-10-10 16:22:07,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:22:07,638 INFO L225 Difference]: With dead ends: 182 [2018-10-10 16:22:07,638 INFO L226 Difference]: Without dead ends: 182 [2018-10-10 16:22:07,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1890, Invalid=5942, Unknown=0, NotChecked=0, Total=7832 [2018-10-10 16:22:07,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-10 16:22:07,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 172. [2018-10-10 16:22:07,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-10-10 16:22:07,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2018-10-10 16:22:07,645 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 159 [2018-10-10 16:22:07,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:22:07,646 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2018-10-10 16:22:07,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-10 16:22:07,646 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2018-10-10 16:22:07,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-10 16:22:07,648 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:22:07,648 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] [2018-10-10 16:22:07,648 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:22:07,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:22:07,648 INFO L82 PathProgramCache]: Analyzing trace with hash 2088385447, now seen corresponding path program 10 times [2018-10-10 16:22:07,649 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:22:07,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:22:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:22:08,711 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:22:08,712 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-10 16:22:08,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-10 16:22:08,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-10 16:22:08,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2018-10-10 16:22:08,713 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 38 states. [2018-10-10 16:22:11,193 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-10 16:22:11,335 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:22:11,759 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:22:11,903 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:22:12,300 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:22:12,986 WARN L178 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:22:13,550 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:22:13,709 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:22:14,202 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:22:14,790 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-10 16:22:15,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:22:15,701 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2018-10-10 16:22:15,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-10 16:22:15,702 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 171 [2018-10-10 16:22:15,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:22:15,703 INFO L225 Difference]: With dead ends: 194 [2018-10-10 16:22:15,704 INFO L226 Difference]: Without dead ends: 194 [2018-10-10 16:22:15,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1966, Invalid=6590, Unknown=0, NotChecked=0, Total=8556 [2018-10-10 16:22:15,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-10 16:22:15,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 184. [2018-10-10 16:22:15,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-10 16:22:15,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2018-10-10 16:22:15,710 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 171 [2018-10-10 16:22:15,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:22:15,711 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2018-10-10 16:22:15,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-10 16:22:15,711 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2018-10-10 16:22:15,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-10 16:22:15,713 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:22:15,713 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] [2018-10-10 16:22:15,713 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:22:15,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:22:15,714 INFO L82 PathProgramCache]: Analyzing trace with hash 898622863, now seen corresponding path program 11 times [2018-10-10 16:22:15,714 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:22:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:22:16,617 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-10 16:22:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:22:17,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:22:17,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-10 16:22:17,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-10 16:22:17,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-10 16:22:17,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1349, Unknown=0, NotChecked=0, Total=1560 [2018-10-10 16:22:17,527 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand 40 states. [2018-10-10 16:22:18,982 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2018-10-10 16:22:19,621 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-10 16:22:24,115 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2018-10-10 16:22:25,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:22:25,068 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2018-10-10 16:22:25,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-10 16:22:25,069 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 183 [2018-10-10 16:22:25,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:22:25,070 INFO L225 Difference]: With dead ends: 206 [2018-10-10 16:22:25,070 INFO L226 Difference]: Without dead ends: 206 [2018-10-10 16:22:25,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=2435, Invalid=7665, Unknown=0, NotChecked=0, Total=10100 [2018-10-10 16:22:25,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-10-10 16:22:25,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 196. [2018-10-10 16:22:25,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-10 16:22:25,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2018-10-10 16:22:25,076 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 183 [2018-10-10 16:22:25,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:22:25,076 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2018-10-10 16:22:25,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-10 16:22:25,076 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2018-10-10 16:22:25,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-10-10 16:22:25,077 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:22:25,078 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] [2018-10-10 16:22:25,078 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:22:25,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:22:25,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1657932937, now seen corresponding path program 12 times [2018-10-10 16:22:25,079 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:22:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:22:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:22:26,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:22:26,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-10-10 16:22:26,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-10 16:22:26,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-10 16:22:26,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2018-10-10 16:22:26,141 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 42 states. [2018-10-10 16:22:29,314 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-10 16:22:29,503 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2018-10-10 16:22:30,046 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-10 16:22:30,225 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:22:30,723 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:22:30,900 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:22:31,357 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:22:31,542 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:22:32,023 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:22:32,207 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-10 16:22:32,694 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-10 16:22:32,886 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-10 16:22:33,216 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-10 16:22:33,383 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-10 16:22:34,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:22:34,712 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2018-10-10 16:22:34,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-10 16:22:34,713 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 195 [2018-10-10 16:22:34,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:22:34,715 INFO L225 Difference]: With dead ends: 218 [2018-10-10 16:22:34,715 INFO L226 Difference]: Without dead ends: 218 [2018-10-10 16:22:34,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2105 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=2185, Invalid=8321, Unknown=0, NotChecked=0, Total=10506 [2018-10-10 16:22:34,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-10-10 16:22:34,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 208. [2018-10-10 16:22:34,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-10 16:22:34,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2018-10-10 16:22:34,720 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 195 [2018-10-10 16:22:34,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:22:34,721 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2018-10-10 16:22:34,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-10 16:22:34,721 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2018-10-10 16:22:34,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-10 16:22:34,722 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:22:34,722 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] [2018-10-10 16:22:34,722 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:22:34,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:22:34,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1440638303, now seen corresponding path program 13 times [2018-10-10 16:22:34,723 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:22:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:22:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:22:36,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:22:36,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-10 16:22:36,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-10 16:22:36,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-10 16:22:36,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1625, Unknown=0, NotChecked=0, Total=1892 [2018-10-10 16:22:36,152 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 44 states. [2018-10-10 16:22:38,796 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:22:38,933 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:22:39,476 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:22:39,655 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-10 16:22:44,677 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2018-10-10 16:22:45,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:22:45,230 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2018-10-10 16:22:45,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-10 16:22:45,230 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 207 [2018-10-10 16:22:45,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:22:45,232 INFO L225 Difference]: With dead ends: 230 [2018-10-10 16:22:45,232 INFO L226 Difference]: Without dead ends: 230 [2018-10-10 16:22:45,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2716 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=3048, Invalid=9608, Unknown=0, NotChecked=0, Total=12656 [2018-10-10 16:22:45,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-10-10 16:22:45,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 220. [2018-10-10 16:22:45,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-10 16:22:45,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 220 transitions. [2018-10-10 16:22:45,238 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 220 transitions. Word has length 207 [2018-10-10 16:22:45,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:22:45,238 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 220 transitions. [2018-10-10 16:22:45,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-10 16:22:45,239 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 220 transitions. [2018-10-10 16:22:45,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-10 16:22:45,240 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:22:45,240 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] [2018-10-10 16:22:45,240 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:22:45,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:22:45,241 INFO L82 PathProgramCache]: Analyzing trace with hash -2094318777, now seen corresponding path program 14 times [2018-10-10 16:22:45,241 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:22:45,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:22:46,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:22:46,479 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:22:46,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-10 16:22:46,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-10 16:22:46,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-10 16:22:46,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1799, Unknown=0, NotChecked=0, Total=2070 [2018-10-10 16:22:46,480 INFO L87 Difference]: Start difference. First operand 220 states and 220 transitions. Second operand 46 states. [2018-10-10 16:22:49,252 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:22:49,730 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:22:49,923 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:22:50,375 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:22:51,495 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:22:51,661 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:22:52,114 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:22:52,282 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:22:52,734 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:22:52,908 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:22:54,032 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:22:54,903 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-10 16:22:56,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:22:56,440 INFO L93 Difference]: Finished difference Result 242 states and 242 transitions. [2018-10-10 16:22:56,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-10 16:22:56,440 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 219 [2018-10-10 16:22:56,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:22:56,442 INFO L225 Difference]: With dead ends: 242 [2018-10-10 16:22:56,442 INFO L226 Difference]: Without dead ends: 242 [2018-10-10 16:22:56,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2906 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=3140, Invalid=10432, Unknown=0, NotChecked=0, Total=13572 [2018-10-10 16:22:56,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-10-10 16:22:56,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 232. [2018-10-10 16:22:56,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-10-10 16:22:56,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2018-10-10 16:22:56,448 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 219 [2018-10-10 16:22:56,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:22:56,448 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2018-10-10 16:22:56,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-10 16:22:56,448 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2018-10-10 16:22:56,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-10-10 16:22:56,450 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:22:56,450 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] [2018-10-10 16:22:56,450 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:22:56,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:22:56,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1235121455, now seen corresponding path program 15 times [2018-10-10 16:22:56,451 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:22:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:22:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:22:57,781 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:22:57,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-10 16:22:57,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-10 16:22:57,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-10 16:22:57,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1925, Unknown=0, NotChecked=0, Total=2256 [2018-10-10 16:22:57,783 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand 48 states. [2018-10-10 16:23:00,107 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:23:00,285 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:23:03,437 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:23:05,307 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:23:07,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:23:07,815 INFO L93 Difference]: Finished difference Result 254 states and 254 transitions. [2018-10-10 16:23:07,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-10 16:23:07,815 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 231 [2018-10-10 16:23:07,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:23:07,817 INFO L225 Difference]: With dead ends: 254 [2018-10-10 16:23:07,817 INFO L226 Difference]: Without dead ends: 254 [2018-10-10 16:23:07,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3423 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=3729, Invalid=11771, Unknown=0, NotChecked=0, Total=15500 [2018-10-10 16:23:07,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-10-10 16:23:07,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 244. [2018-10-10 16:23:07,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-10-10 16:23:07,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 244 transitions. [2018-10-10 16:23:07,823 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 244 transitions. Word has length 231 [2018-10-10 16:23:07,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:23:07,824 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 244 transitions. [2018-10-10 16:23:07,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-10 16:23:07,824 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 244 transitions. [2018-10-10 16:23:07,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-10 16:23:07,825 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:23:07,826 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] [2018-10-10 16:23:07,826 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:23:07,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:23:07,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1321341719, now seen corresponding path program 16 times [2018-10-10 16:23:07,827 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:23:07,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:23:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:23:09,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:23:09,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-10 16:23:09,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-10 16:23:09,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-10 16:23:09,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2122, Unknown=0, NotChecked=0, Total=2256 [2018-10-10 16:23:09,690 INFO L87 Difference]: Start difference. First operand 244 states and 244 transitions. Second operand 48 states. [2018-10-10 16:23:20,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:23:20,839 INFO L93 Difference]: Finished difference Result 266 states and 266 transitions. [2018-10-10 16:23:20,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-10 16:23:20,839 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 243 [2018-10-10 16:23:20,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:23:20,842 INFO L225 Difference]: With dead ends: 266 [2018-10-10 16:23:20,842 INFO L226 Difference]: Without dead ends: 266 [2018-10-10 16:23:20,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2323 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1535, Invalid=11575, Unknown=0, NotChecked=0, Total=13110 [2018-10-10 16:23:20,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-10-10 16:23:20,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 256. [2018-10-10 16:23:20,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-10-10 16:23:20,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 256 transitions. [2018-10-10 16:23:20,848 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 256 transitions. Word has length 243 [2018-10-10 16:23:20,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:23:20,849 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 256 transitions. [2018-10-10 16:23:20,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-10 16:23:20,849 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 256 transitions. [2018-10-10 16:23:20,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-10-10 16:23:20,850 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:23:20,851 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] [2018-10-10 16:23:20,851 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:23:20,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:23:20,851 INFO L82 PathProgramCache]: Analyzing trace with hash 958403839, now seen corresponding path program 17 times [2018-10-10 16:23:20,852 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:23:20,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:23:22,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:23:22,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:23:22,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-10-10 16:23:22,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-10 16:23:22,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-10 16:23:22,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=2249, Unknown=0, NotChecked=0, Total=2652 [2018-10-10 16:23:22,515 INFO L87 Difference]: Start difference. First operand 256 states and 256 transitions. Second operand 52 states. [2018-10-10 16:23:25,502 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-10 16:23:25,688 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:23:30,717 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:23:30,950 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:23:32,767 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:23:35,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:23:35,445 INFO L93 Difference]: Finished difference Result 278 states and 278 transitions. [2018-10-10 16:23:35,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-10 16:23:35,445 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 255 [2018-10-10 16:23:35,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:23:35,447 INFO L225 Difference]: With dead ends: 278 [2018-10-10 16:23:35,447 INFO L226 Difference]: Without dead ends: 278 [2018-10-10 16:23:35,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4214 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=4478, Invalid=14154, Unknown=0, NotChecked=0, Total=18632 [2018-10-10 16:23:35,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-10-10 16:23:35,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 268. [2018-10-10 16:23:35,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-10-10 16:23:35,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 268 transitions. [2018-10-10 16:23:35,454 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 268 transitions. Word has length 255 [2018-10-10 16:23:35,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:23:35,454 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 268 transitions. [2018-10-10 16:23:35,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-10 16:23:35,454 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 268 transitions. [2018-10-10 16:23:35,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-10-10 16:23:35,456 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:23:35,456 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] [2018-10-10 16:23:35,456 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:23:35,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:23:35,457 INFO L82 PathProgramCache]: Analyzing trace with hash 809663207, now seen corresponding path program 18 times [2018-10-10 16:23:35,457 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:23:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:23:37,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:23:37,345 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:23:37,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-10-10 16:23:37,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-10 16:23:37,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-10 16:23:37,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2455, Unknown=0, NotChecked=0, Total=2862 [2018-10-10 16:23:37,347 INFO L87 Difference]: Start difference. First operand 268 states and 268 transitions. Second operand 54 states. [2018-10-10 16:23:40,214 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-10 16:23:40,354 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:23:40,808 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:23:40,983 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:23:41,141 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-10 16:23:41,443 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:23:41,592 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:23:42,011 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:23:42,160 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:23:42,588 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:23:42,756 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:23:43,211 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:23:43,384 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:23:43,856 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:23:44,054 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:23:44,514 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:23:44,700 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:23:45,195 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:23:45,389 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:23:45,898 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:23:46,110 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:23:46,679 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:23:46,881 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:23:47,395 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:23:47,604 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:23:48,140 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:23:48,356 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:23:48,886 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:23:49,098 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-10 16:23:50,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:23:50,741 INFO L93 Difference]: Finished difference Result 290 states and 290 transitions. [2018-10-10 16:23:50,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-10 16:23:50,741 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 267 [2018-10-10 16:23:50,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:23:50,743 INFO L225 Difference]: With dead ends: 290 [2018-10-10 16:23:50,743 INFO L226 Difference]: Without dead ends: 290 [2018-10-10 16:23:50,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4448 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=4586, Invalid=15154, Unknown=0, NotChecked=0, Total=19740 [2018-10-10 16:23:50,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-10-10 16:23:50,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 280. [2018-10-10 16:23:50,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-10-10 16:23:50,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 280 transitions. [2018-10-10 16:23:50,749 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 280 transitions. Word has length 267 [2018-10-10 16:23:50,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:23:50,750 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 280 transitions. [2018-10-10 16:23:50,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-10 16:23:50,750 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 280 transitions. [2018-10-10 16:23:50,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-10-10 16:23:50,752 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:23:50,752 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] [2018-10-10 16:23:50,752 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:23:50,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:23:50,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1555252431, now seen corresponding path program 19 times [2018-10-10 16:23:50,753 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:23:50,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:23:52,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:23:52,761 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:23:52,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-10-10 16:23:52,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-10 16:23:52,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-10 16:23:52,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=2597, Unknown=0, NotChecked=0, Total=3080 [2018-10-10 16:23:52,762 INFO L87 Difference]: Start difference. First operand 280 states and 280 transitions. Second operand 56 states. [2018-10-10 16:23:55,402 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:23:55,844 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:23:56,387 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:23:56,552 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:23:59,055 WARN L178 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-10 16:23:59,807 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:24:06,522 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2018-10-10 16:24:06,765 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2018-10-10 16:24:07,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:24:07,406 INFO L93 Difference]: Finished difference Result 302 states and 302 transitions. [2018-10-10 16:24:07,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-10 16:24:07,407 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 279 [2018-10-10 16:24:07,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:24:07,408 INFO L225 Difference]: With dead ends: 302 [2018-10-10 16:24:07,409 INFO L226 Difference]: Without dead ends: 302 [2018-10-10 16:24:07,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5089 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=5295, Invalid=16757, Unknown=0, NotChecked=0, Total=22052 [2018-10-10 16:24:07,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2018-10-10 16:24:07,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 292. [2018-10-10 16:24:07,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-10-10 16:24:07,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 292 transitions. [2018-10-10 16:24:07,415 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 292 transitions. Word has length 279 [2018-10-10 16:24:07,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:24:07,415 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 292 transitions. [2018-10-10 16:24:07,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-10 16:24:07,416 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 292 transitions. [2018-10-10 16:24:07,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-10-10 16:24:07,417 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:24:07,417 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] [2018-10-10 16:24:07,418 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:24:07,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:24:07,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1744597687, now seen corresponding path program 20 times [2018-10-10 16:24:07,419 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:24:07,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:24:07,994 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-10 16:24:09,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:24:09,921 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:24:09,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-10-10 16:24:09,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-10 16:24:09,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-10 16:24:09,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=2891, Unknown=0, NotChecked=0, Total=3306 [2018-10-10 16:24:09,923 INFO L87 Difference]: Start difference. First operand 292 states and 292 transitions. Second operand 58 states. [2018-10-10 16:24:13,744 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-10 16:24:13,890 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2018-10-10 16:24:14,457 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-10 16:24:14,636 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:24:15,158 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:24:15,330 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:24:15,798 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:24:15,980 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:24:16,473 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:24:16,659 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:24:16,865 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-10 16:24:17,060 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-10 16:24:17,254 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:24:17,451 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:24:17,955 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:24:18,161 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:24:18,683 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:24:18,895 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:24:19,435 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:24:19,660 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:24:20,232 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:24:20,465 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:24:21,045 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:24:21,284 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:24:21,893 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:24:22,194 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:24:22,824 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:24:23,064 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-10 16:24:23,646 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-10 16:24:23,878 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-10 16:24:24,311 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-10 16:24:24,534 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-10 16:24:26,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:24:26,113 INFO L93 Difference]: Finished difference Result 314 states and 314 transitions. [2018-10-10 16:24:26,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-10 16:24:26,114 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 291 [2018-10-10 16:24:26,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:24:26,116 INFO L225 Difference]: With dead ends: 314 [2018-10-10 16:24:26,116 INFO L226 Difference]: Without dead ends: 314 [2018-10-10 16:24:26,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5093 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=4885, Invalid=17765, Unknown=0, NotChecked=0, Total=22650 [2018-10-10 16:24:26,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2018-10-10 16:24:26,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 304. [2018-10-10 16:24:26,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-10-10 16:24:26,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 304 transitions. [2018-10-10 16:24:26,123 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 304 transitions. Word has length 291 [2018-10-10 16:24:26,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:24:26,123 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 304 transitions. [2018-10-10 16:24:26,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-10 16:24:26,123 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 304 transitions. [2018-10-10 16:24:26,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-10-10 16:24:26,125 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:24:26,125 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] [2018-10-10 16:24:26,125 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:24:26,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:24:26,126 INFO L82 PathProgramCache]: Analyzing trace with hash -56097633, now seen corresponding path program 21 times [2018-10-10 16:24:26,126 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:24:26,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:24:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:24:28,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:24:28,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-10-10 16:24:28,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-10 16:24:28,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-10 16:24:28,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=2969, Unknown=0, NotChecked=0, Total=3540 [2018-10-10 16:24:28,418 INFO L87 Difference]: Start difference. First operand 304 states and 304 transitions. Second operand 60 states. [2018-10-10 16:24:30,546 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-10 16:24:32,183 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:24:32,356 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:24:40,679 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:24:42,511 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2018-10-10 16:24:43,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:24:43,774 INFO L93 Difference]: Finished difference Result 326 states and 326 transitions. [2018-10-10 16:24:43,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-10 16:24:43,777 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 303 [2018-10-10 16:24:43,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:24:43,778 INFO L225 Difference]: With dead ends: 326 [2018-10-10 16:24:43,779 INFO L226 Difference]: Without dead ends: 326 [2018-10-10 16:24:43,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6048 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=6180, Invalid=19580, Unknown=0, NotChecked=0, Total=25760 [2018-10-10 16:24:43,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2018-10-10 16:24:43,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 316. [2018-10-10 16:24:43,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-10-10 16:24:43,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 316 transitions. [2018-10-10 16:24:43,784 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 316 transitions. Word has length 303 [2018-10-10 16:24:43,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:24:43,784 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 316 transitions. [2018-10-10 16:24:43,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-10 16:24:43,785 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 316 transitions. [2018-10-10 16:24:43,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-10-10 16:24:43,786 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:24:43,786 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] [2018-10-10 16:24:43,787 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:24:43,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:24:43,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1178598023, now seen corresponding path program 22 times [2018-10-10 16:24:43,788 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:24:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:24:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:24:45,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:24:45,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-10-10 16:24:45,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-10 16:24:45,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-10 16:24:45,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=3207, Unknown=0, NotChecked=0, Total=3782 [2018-10-10 16:24:45,871 INFO L87 Difference]: Start difference. First operand 316 states and 316 transitions. Second operand 62 states. [2018-10-10 16:24:48,849 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-10 16:24:48,996 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:24:49,463 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:24:49,611 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:24:50,031 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:24:50,599 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:24:50,750 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:24:51,201 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:24:51,365 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:24:51,836 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:24:52,006 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:24:52,482 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:24:52,705 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:24:52,899 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-10 16:24:53,240 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:24:53,896 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:24:54,083 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:24:54,581 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:24:54,777 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:24:55,288 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:24:55,494 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:24:56,031 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:24:56,242 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:24:56,796 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:24:57,015 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:24:57,550 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:24:57,795 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:24:59,199 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:24:59,432 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:25:00,016 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:25:00,259 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:25:00,856 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:25:01,093 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-10 16:25:02,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:25:02,992 INFO L93 Difference]: Finished difference Result 338 states and 338 transitions. [2018-10-10 16:25:02,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-10 16:25:02,993 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 315 [2018-10-10 16:25:02,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:25:02,995 INFO L225 Difference]: With dead ends: 338 [2018-10-10 16:25:02,996 INFO L226 Difference]: Without dead ends: 338 [2018-10-10 16:25:02,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6326 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=6304, Invalid=20756, Unknown=0, NotChecked=0, Total=27060 [2018-10-10 16:25:02,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-10-10 16:25:03,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 328. [2018-10-10 16:25:03,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-10-10 16:25:03,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 328 transitions. [2018-10-10 16:25:03,002 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 328 transitions. Word has length 315 [2018-10-10 16:25:03,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:25:03,002 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 328 transitions. [2018-10-10 16:25:03,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-10 16:25:03,003 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 328 transitions. [2018-10-10 16:25:03,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-10-10 16:25:03,004 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:25:03,004 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] [2018-10-10 16:25:03,005 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:25:03,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:25:03,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1900958831, now seen corresponding path program 23 times [2018-10-10 16:25:03,005 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:25:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:25:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:25:05,197 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:25:05,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-10-10 16:25:05,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-10 16:25:05,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-10 16:25:05,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=667, Invalid=3365, Unknown=0, NotChecked=0, Total=4032 [2018-10-10 16:25:05,199 INFO L87 Difference]: Start difference. First operand 328 states and 328 transitions. Second operand 64 states. [2018-10-10 16:25:07,887 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-10 16:25:08,070 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:25:10,807 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:25:12,676 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:25:13,434 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:25:18,348 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:25:22,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:25:22,995 INFO L93 Difference]: Finished difference Result 350 states and 350 transitions. [2018-10-10 16:25:22,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-10-10 16:25:22,995 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 327 [2018-10-10 16:25:22,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:25:22,997 INFO L225 Difference]: With dead ends: 350 [2018-10-10 16:25:22,997 INFO L226 Difference]: Without dead ends: 350 [2018-10-10 16:25:22,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7091 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=7133, Invalid=22623, Unknown=0, NotChecked=0, Total=29756 [2018-10-10 16:25:22,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2018-10-10 16:25:23,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 340. [2018-10-10 16:25:23,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-10-10 16:25:23,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 340 transitions. [2018-10-10 16:25:23,003 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 340 transitions. Word has length 327 [2018-10-10 16:25:23,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:25:23,003 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 340 transitions. [2018-10-10 16:25:23,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-10 16:25:23,004 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 340 transitions. [2018-10-10 16:25:23,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-10-10 16:25:23,005 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:25:23,006 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] [2018-10-10 16:25:23,006 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:25:23,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:25:23,006 INFO L82 PathProgramCache]: Analyzing trace with hash 727519831, now seen corresponding path program 24 times [2018-10-10 16:25:23,007 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:25:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:25:23,614 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-10 16:25:26,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:25:26,244 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:25:26,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-10-10 16:25:26,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-10 16:25:26,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-10 16:25:26,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=3859, Unknown=0, NotChecked=0, Total=4290 [2018-10-10 16:25:26,245 INFO L87 Difference]: Start difference. First operand 340 states and 340 transitions. Second operand 66 states. [2018-10-10 16:25:28,543 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2018-10-10 16:25:29,955 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-10 16:25:30,119 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2018-10-10 16:25:30,670 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2018-10-10 16:25:30,849 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 49 [2018-10-10 16:25:31,420 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 49 [2018-10-10 16:25:31,606 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 49 [2018-10-10 16:25:32,202 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 49 [2018-10-10 16:25:32,406 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 49 [2018-10-10 16:25:33,045 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 49 [2018-10-10 16:25:33,266 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 49 [2018-10-10 16:25:33,721 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 49 [2018-10-10 16:25:34,034 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 56 [2018-10-10 16:25:34,289 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 16:25:34,473 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 16:25:34,699 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 16:25:34,947 WARN L178 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 16:25:35,194 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 16:25:35,375 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 16:25:35,565 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 16:25:35,819 WARN L178 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 16:25:36,076 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 16:25:36,259 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 16:25:36,460 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 16:25:36,729 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 16:25:37,001 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 16:25:37,195 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 16:25:37,394 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 16:25:37,665 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 16:25:37,947 WARN L178 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 16:25:38,147 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 16:25:38,360 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 16:25:38,653 WARN L178 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 16:25:38,988 WARN L178 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 16:25:39,193 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 16:25:39,398 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 16:25:39,688 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 16:25:39,993 WARN L178 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 16:25:40,212 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 16:25:40,425 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 16:25:40,711 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 16:25:41,004 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 58 [2018-10-10 16:25:41,210 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2018-10-10 16:25:41,413 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2018-10-10 16:25:41,684 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 57 [2018-10-10 16:25:41,967 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 58 [2018-10-10 16:25:42,475 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 57 [2018-10-10 16:25:42,744 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 58 [2018-10-10 16:25:43,223 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 57 [2018-10-10 16:25:43,488 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2018-10-10 16:25:43,985 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2018-10-10 16:25:44,263 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2018-10-10 16:25:44,712 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2018-10-10 16:25:44,955 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2018-10-10 16:25:45,389 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2018-10-10 16:25:45,637 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2018-10-10 16:25:47,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:25:47,305 INFO L93 Difference]: Finished difference Result 362 states and 362 transitions. [2018-10-10 16:25:47,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-10 16:25:47,305 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 339 [2018-10-10 16:25:47,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:25:47,307 INFO L225 Difference]: With dead ends: 362 [2018-10-10 16:25:47,307 INFO L226 Difference]: Without dead ends: 362 [2018-10-10 16:25:47,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6491 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=5471, Invalid=23599, Unknown=0, NotChecked=0, Total=29070 [2018-10-10 16:25:47,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2018-10-10 16:25:47,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 352. [2018-10-10 16:25:47,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-10-10 16:25:47,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 352 transitions. [2018-10-10 16:25:47,312 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 352 transitions. Word has length 339 [2018-10-10 16:25:47,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:25:47,312 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 352 transitions. [2018-10-10 16:25:47,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-10 16:25:47,312 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 352 transitions. [2018-10-10 16:25:47,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-10-10 16:25:47,314 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:25:47,314 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] [2018-10-10 16:25:47,314 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:25:47,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:25:47,315 INFO L82 PathProgramCache]: Analyzing trace with hash 586560575, now seen corresponding path program 25 times [2018-10-10 16:25:47,315 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:25:47,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:25:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:25:50,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:25:50,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-10-10 16:25:50,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-10 16:25:50,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-10 16:25:50,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=771, Invalid=3785, Unknown=0, NotChecked=0, Total=4556 [2018-10-10 16:25:50,461 INFO L87 Difference]: Start difference. First operand 352 states and 352 transitions. Second operand 68 states. [2018-10-10 16:25:53,356 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-10 16:25:54,106 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:25:54,316 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-10 16:25:59,477 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:26:04,559 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:26:09,646 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2018-10-10 16:26:10,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:26:10,343 INFO L93 Difference]: Finished difference Result 374 states and 374 transitions. [2018-10-10 16:26:10,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-10-10 16:26:10,344 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 351 [2018-10-10 16:26:10,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:26:10,346 INFO L225 Difference]: With dead ends: 374 [2018-10-10 16:26:10,346 INFO L226 Difference]: Without dead ends: 374 [2018-10-10 16:26:10,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8218 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=8154, Invalid=25886, Unknown=0, NotChecked=0, Total=34040 [2018-10-10 16:26:10,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2018-10-10 16:26:10,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 364. [2018-10-10 16:26:10,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-10-10 16:26:10,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 364 transitions. [2018-10-10 16:26:10,353 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 364 transitions. Word has length 351 [2018-10-10 16:26:10,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:26:10,354 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 364 transitions. [2018-10-10 16:26:10,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-10 16:26:10,354 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 364 transitions. [2018-10-10 16:26:10,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-10-10 16:26:10,356 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:26:10,356 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] [2018-10-10 16:26:10,356 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:26:10,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:26:10,356 INFO L82 PathProgramCache]: Analyzing trace with hash -2019313113, now seen corresponding path program 26 times [2018-10-10 16:26:10,357 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:26:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:26:12,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:26:12,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:26:12,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-10-10 16:26:12,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-10 16:26:12,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-10 16:26:12,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=775, Invalid=4055, Unknown=0, NotChecked=0, Total=4830 [2018-10-10 16:26:12,955 INFO L87 Difference]: Start difference. First operand 364 states and 364 transitions. Second operand 70 states. [2018-10-10 16:26:14,860 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2018-10-10 16:26:15,399 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-10 16:26:15,549 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:26:15,989 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:26:16,137 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:26:16,582 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:26:16,737 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:26:17,186 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:26:17,347 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:26:17,787 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:26:17,946 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:26:18,400 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:26:19,033 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:26:19,202 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:26:19,705 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:26:19,932 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:26:20,417 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:26:20,601 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:26:21,094 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:26:21,291 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:26:21,800 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:26:21,997 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:26:22,527 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:26:23,257 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:26:23,470 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:26:24,015 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:26:24,240 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:26:24,829 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:26:25,099 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:26:25,670 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:26:25,915 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:26:26,515 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:26:26,766 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:26:27,371 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:26:27,686 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:26:28,309 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:26:28,558 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:26:29,178 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:26:29,438 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:26:29,874 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-10 16:26:30,163 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:26:30,449 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:26:31,107 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:26:31,367 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-10 16:26:32,006 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-10 16:26:33,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:26:33,455 INFO L93 Difference]: Finished difference Result 386 states and 386 transitions. [2018-10-10 16:26:33,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-10-10 16:26:33,460 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 363 [2018-10-10 16:26:33,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:26:33,462 INFO L225 Difference]: With dead ends: 386 [2018-10-10 16:26:33,462 INFO L226 Difference]: Without dead ends: 386 [2018-10-10 16:26:33,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8540 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=8294, Invalid=27238, Unknown=0, NotChecked=0, Total=35532 [2018-10-10 16:26:33,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2018-10-10 16:26:33,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 376. [2018-10-10 16:26:33,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2018-10-10 16:26:33,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 376 transitions. [2018-10-10 16:26:33,469 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 376 transitions. Word has length 363 [2018-10-10 16:26:33,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:26:33,470 INFO L481 AbstractCegarLoop]: Abstraction has 376 states and 376 transitions. [2018-10-10 16:26:33,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-10 16:26:33,470 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 376 transitions. [2018-10-10 16:26:33,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-10-10 16:26:33,472 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:26:33,472 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] [2018-10-10 16:26:33,472 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:26:33,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:26:33,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1980783601, now seen corresponding path program 27 times [2018-10-10 16:26:33,473 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:26:33,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:26:36,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:26:36,378 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:26:36,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-10-10 16:26:36,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-10 16:26:36,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-10 16:26:36,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=883, Invalid=4229, Unknown=0, NotChecked=0, Total=5112 [2018-10-10 16:26:36,380 INFO L87 Difference]: Start difference. First operand 376 states and 376 transitions. Second operand 72 states. [2018-10-10 16:26:40,200 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-10 16:26:41,773 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:26:45,347 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:26:50,548 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:26:50,805 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:26:53,936 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:26:55,529 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-10 16:26:55,852 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:26:58,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:26:58,308 INFO L93 Difference]: Finished difference Result 398 states and 398 transitions. [2018-10-10 16:26:58,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-10 16:26:58,309 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 375 [2018-10-10 16:26:58,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:26:58,310 INFO L225 Difference]: With dead ends: 398 [2018-10-10 16:26:58,310 INFO L226 Difference]: Without dead ends: 398 [2018-10-10 16:26:58,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9429 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=9243, Invalid=29369, Unknown=0, NotChecked=0, Total=38612 [2018-10-10 16:26:58,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2018-10-10 16:26:58,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 388. [2018-10-10 16:26:58,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-10-10 16:26:58,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 388 transitions. [2018-10-10 16:26:58,318 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 388 transitions. Word has length 375 [2018-10-10 16:26:58,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:26:58,318 INFO L481 AbstractCegarLoop]: Abstraction has 388 states and 388 transitions. [2018-10-10 16:26:58,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-10 16:26:58,318 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 388 transitions. [2018-10-10 16:26:58,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-10-10 16:26:58,320 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:26:58,321 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] [2018-10-10 16:26:58,321 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:26:58,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:26:58,321 INFO L82 PathProgramCache]: Analyzing trace with hash -614206985, now seen corresponding path program 28 times [2018-10-10 16:26:58,322 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:26:58,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:26:58,926 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-10 16:26:59,351 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-10 16:27:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:27:02,362 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:27:02,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-10-10 16:27:02,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-10 16:27:02,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-10 16:27:02,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=4619, Unknown=0, NotChecked=0, Total=5402 [2018-10-10 16:27:02,364 INFO L87 Difference]: Start difference. First operand 388 states and 388 transitions. Second operand 74 states. [2018-10-10 16:27:05,604 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-10 16:27:05,785 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2018-10-10 16:27:06,350 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-10 16:27:06,531 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:27:07,061 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:27:07,246 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:27:07,751 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:27:07,928 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:27:08,412 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:27:08,599 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:27:09,115 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:27:09,310 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:27:09,828 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:27:10,032 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:27:10,605 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:27:10,829 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:27:11,050 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-10 16:27:11,471 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:27:11,682 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:27:12,231 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:27:12,456 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:27:13,042 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:27:13,274 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:27:13,864 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:27:14,097 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:27:14,692 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:27:14,932 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:27:15,542 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:27:15,783 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:27:16,010 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-10 16:27:16,278 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-10 16:27:16,507 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:27:16,762 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:27:17,387 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:27:17,651 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:27:18,314 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:27:18,579 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:27:19,232 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:27:19,510 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:27:20,187 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:27:20,480 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:27:21,207 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:27:21,550 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 16:27:22,242 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 16:27:22,530 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-10 16:27:23,237 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-10 16:27:23,523 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-10 16:27:24,056 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-10 16:27:24,330 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-10 16:27:24,830 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2018-10-10 16:27:26,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:27:26,426 INFO L93 Difference]: Finished difference Result 410 states and 410 transitions. [2018-10-10 16:27:26,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-10 16:27:26,426 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 387 [2018-10-10 16:27:26,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:27:26,429 INFO L225 Difference]: With dead ends: 410 [2018-10-10 16:27:26,429 INFO L226 Difference]: Without dead ends: 410 [2018-10-10 16:27:26,432 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 [2018-10-10 16:27:26,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2018-10-10 16:27:26,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 400. [2018-10-10 16:27:26,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2018-10-10 16:27:26,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 400 transitions. [2018-10-10 16:27:26,437 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 400 transitions. Word has length 387 [2018-10-10 16:27:26,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:27:26,438 INFO L481 AbstractCegarLoop]: Abstraction has 400 states and 400 transitions. [2018-10-10 16:27:26,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-10 16:27:26,438 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 400 transitions. [2018-10-10 16:27:26,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-10-10 16:27:26,440 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:27:26,440 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] [2018-10-10 16:27:26,441 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:27:26,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:27:26,441 INFO L82 PathProgramCache]: Analyzing trace with hash 780837855, now seen corresponding path program 29 times [2018-10-10 16:27:26,442 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:27:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:27:29,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 5017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:27:29,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:27:29,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-10-10 16:27:29,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-10 16:27:29,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-10 16:27:29,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1003, Invalid=4697, Unknown=0, NotChecked=0, Total=5700 [2018-10-10 16:27:29,515 INFO L87 Difference]: Start difference. First operand 400 states and 400 transitions. Second operand 76 states. [2018-10-10 16:27:32,822 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-10 16:27:36,534 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-10 16:27:38,181 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:27:41,806 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:27:46,704 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:27:47,016 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:27:52,160 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:27:53,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:27:53,818 INFO L93 Difference]: Finished difference Result 422 states and 422 transitions. [2018-10-10 16:27:53,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-10-10 16:27:53,819 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 399 [2018-10-10 16:27:53,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:27:53,821 INFO L225 Difference]: With dead ends: 422 [2018-10-10 16:27:53,821 INFO L226 Difference]: Without dead ends: 422 [2018-10-10 16:27:53,823 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10724 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=10400, Invalid=33072, Unknown=0, NotChecked=0, Total=43472 [2018-10-10 16:27:53,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2018-10-10 16:27:53,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 412. [2018-10-10 16:27:53,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-10-10 16:27:53,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 412 transitions. [2018-10-10 16:27:53,827 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 412 transitions. Word has length 399 [2018-10-10 16:27:53,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:27:53,828 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 412 transitions. [2018-10-10 16:27:53,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-10 16:27:53,828 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 412 transitions. [2018-10-10 16:27:53,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-10-10 16:27:53,830 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:27:53,830 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] [2018-10-10 16:27:53,831 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:27:53,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:27:53,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1225934393, now seen corresponding path program 30 times [2018-10-10 16:27:53,831 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:27:53,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:27:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:27:56,933 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:27:56,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-10-10 16:27:56,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-10 16:27:56,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-10 16:27:56,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1007, Invalid=4999, Unknown=0, NotChecked=0, Total=6006 [2018-10-10 16:27:56,935 INFO L87 Difference]: Start difference. First operand 412 states and 412 transitions. Second operand 78 states. [2018-10-10 16:27:59,971 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-10 16:28:00,116 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:28:00,601 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:28:00,748 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:28:01,198 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:28:01,356 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:28:01,816 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:28:01,980 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:28:02,556 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:28:02,717 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:28:03,191 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:28:03,827 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:28:04,482 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:28:05,153 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:28:05,342 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:28:05,850 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:28:06,556 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:28:06,751 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:28:07,358 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:28:07,596 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:28:08,158 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:28:08,378 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:28:08,941 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:28:09,167 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:28:09,762 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:28:09,987 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:28:10,565 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:28:10,799 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:28:11,411 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:28:11,648 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:28:12,269 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:28:12,576 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:28:13,220 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:28:13,485 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:28:14,140 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:28:14,404 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:28:15,066 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:28:15,339 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:28:16,009 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:28:16,278 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:28:16,964 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:28:17,246 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:28:17,584 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-10 16:28:18,099 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:28:18,410 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:28:19,129 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:28:19,422 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 16:28:20,110 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 16:28:22,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:28:22,876 INFO L93 Difference]: Finished difference Result 434 states and 434 transitions. [2018-10-10 16:28:22,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-10-10 16:28:22,877 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 411 [2018-10-10 16:28:22,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:28:22,878 INFO L225 Difference]: With dead ends: 434 [2018-10-10 16:28:22,878 INFO L226 Difference]: Without dead ends: 434 [2018-10-10 16:28:22,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11090 ImplicationChecksByTransitivity, 26.3s TimeCoverageRelationStatistics Valid=10556, Invalid=34600, Unknown=0, NotChecked=0, Total=45156 [2018-10-10 16:28:22,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-10-10 16:28:22,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 424. [2018-10-10 16:28:22,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-10-10 16:28:22,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 424 transitions. [2018-10-10 16:28:22,885 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 424 transitions. Word has length 411 [2018-10-10 16:28:22,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:28:22,886 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 424 transitions. [2018-10-10 16:28:22,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-10 16:28:22,886 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 424 transitions. [2018-10-10 16:28:22,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-10-10 16:28:22,888 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:28:22,889 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] [2018-10-10 16:28:22,889 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:28:22,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:28:22,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1458097233, now seen corresponding path program 31 times [2018-10-10 16:28:22,890 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:28:22,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:28:23,466 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-10 16:28:27,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:28:27,763 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:28:27,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-10 16:28:27,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-10 16:28:27,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-10 16:28:27,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1131, Invalid=5189, Unknown=0, NotChecked=0, Total=6320 [2018-10-10 16:28:27,765 INFO L87 Difference]: Start difference. First operand 424 states and 424 transitions. Second operand 80 states. [2018-10-10 16:28:32,733 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:28:32,943 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:28:37,935 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:28:38,194 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 16:28:43,128 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-10 16:28:51,509 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 16:28:54,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 16:28:54,372 INFO L93 Difference]: Finished difference Result 446 states and 446 transitions. [2018-10-10 16:28:54,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-10-10 16:28:54,372 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 423 [2018-10-10 16:28:54,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 16:28:54,374 INFO L225 Difference]: With dead ends: 446 [2018-10-10 16:28:54,374 INFO L226 Difference]: Without dead ends: 446 [2018-10-10 16:28:54,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12103 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=11625, Invalid=36995, Unknown=0, NotChecked=0, Total=48620 [2018-10-10 16:28:54,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2018-10-10 16:28:54,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 436. [2018-10-10 16:28:54,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2018-10-10 16:28:54,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 436 transitions. [2018-10-10 16:28:54,383 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 436 transitions. Word has length 423 [2018-10-10 16:28:54,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 16:28:54,383 INFO L481 AbstractCegarLoop]: Abstraction has 436 states and 436 transitions. [2018-10-10 16:28:54,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-10 16:28:54,383 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 436 transitions. [2018-10-10 16:28:54,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-10-10 16:28:54,386 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 16:28:54,386 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] [2018-10-10 16:28:54,386 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 16:28:54,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 16:28:54,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1164897897, now seen corresponding path program 32 times [2018-10-10 16:28:54,387 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 16:28:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 16:28:59,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 0 proven. 6112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 16:28:59,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 16:28:59,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-10 16:28:59,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-10 16:28:59,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-10 16:28:59,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=6090, Unknown=0, NotChecked=0, Total=6320 [2018-10-10 16:28:59,277 INFO L87 Difference]: Start difference. First operand 436 states and 436 transitions. Second operand 80 states.