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/AutomizerBpl.xml -s ../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf -i ../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_false-valid-free.i_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-093a8c0 [2018-10-14 16:24:31,131 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-14 16:24:31,133 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-14 16:24:31,147 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-14 16:24:31,147 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-14 16:24:31,149 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-14 16:24:31,150 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-14 16:24:31,152 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-14 16:24:31,154 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-14 16:24:31,155 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-14 16:24:31,156 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-14 16:24:31,173 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-14 16:24:31,174 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-14 16:24:31,175 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-14 16:24:31,176 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-14 16:24:31,177 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-14 16:24:31,178 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-14 16:24:31,179 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-14 16:24:31,179 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-14 16:24:31,180 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-14 16:24:31,180 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-14 16:24:31,181 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-14 16:24:31,182 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-14 16:24:31,183 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-14 16:24:31,183 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf [2018-10-14 16:24:31,193 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-14 16:24:31,193 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-14 16:24:31,194 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-14 16:24:31,194 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-14 16:24:31,195 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-14 16:24:31,195 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-14 16:24:31,195 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-14 16:24:31,196 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-14 16:24:31,196 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-14 16:24:31,196 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-14 16:24:31,196 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-14 16:24:31,197 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-14 16:24:31,197 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-14 16:24:31,198 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-14 16:24:31,198 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-14 16:24:31,240 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-14 16:24:31,253 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-14 16:24:31,256 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-14 16:24:31,258 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-14 16:24:31,259 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-14 16:24:31,259 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_false-valid-free.i_5.bpl [2018-10-14 16:24:31,260 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_false-valid-free.i_5.bpl' [2018-10-14 16:24:31,320 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-14 16:24:31,321 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-10-14 16:24:31,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-14 16:24:31,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-14 16:24:31,328 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-14 16:24:31,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:24:31" (1/1) ... [2018-10-14 16:24:31,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:24:31" (1/1) ... [2018-10-14 16:24:31,374 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:24:31" (1/1) ... [2018-10-14 16:24:31,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:24:31" (1/1) ... [2018-10-14 16:24:31,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:24:31" (1/1) ... [2018-10-14 16:24:31,384 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:24:31" (1/1) ... [2018-10-14 16:24:31,386 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:24:31" (1/1) ... [2018-10-14 16:24:31,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-14 16:24:31,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-14 16:24:31,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-14 16:24:31,389 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-14 16:24:31,393 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:24:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-14 16:24:31,472 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-14 16:24:31,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-14 16:24:31,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-14 16:24:32,019 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-14 16:24:32,020 INFO L202 PluginConnector]: Adding new model 960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:24:32 BoogieIcfgContainer [2018-10-14 16:24:32,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-14 16:24:32,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-14 16:24:32,022 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-14 16:24:32,025 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-14 16:24:32,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:24:31" (1/2) ... [2018-10-14 16:24:32,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a94981c and model type 960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 04:24:32, skipping insertion in model container [2018-10-14 16:24:32,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:24:32" (2/2) ... [2018-10-14 16:24:32,029 INFO L112 eAbstractionObserver]: Analyzing ICFG 960521-1_false-valid-free.i_5.bpl [2018-10-14 16:24:32,039 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-10-14 16:24:32,048 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-14 16:24:32,066 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-14 16:24:32,096 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-14 16:24:32,097 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-14 16:24:32,097 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-14 16:24:32,097 INFO L384 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-10-14 16:24:32,097 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-14 16:24:32,097 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-14 16:24:32,097 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-14 16:24:32,098 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-14 16:24:32,098 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-14 16:24:32,117 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2018-10-14 16:24:32,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-14 16:24:32,127 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:24:32,128 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:24:32,129 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:24:32,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:24:32,136 INFO L82 PathProgramCache]: Analyzing trace with hash -412527006, now seen corresponding path program 1 times [2018-10-14 16:24:32,202 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:24:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:24:33,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:24:33,317 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-14 16:24:33,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2018-10-14 16:24:33,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-14 16:24:33,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-14 16:24:33,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-10-14 16:24:33,343 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 14 states. [2018-10-14 16:24:33,927 WARN L179 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-10-14 16:24:34,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:24:34,739 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-14 16:24:34,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-14 16:24:34,742 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2018-10-14 16:24:34,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:24:34,756 INFO L225 Difference]: With dead ends: 74 [2018-10-14 16:24:34,756 INFO L226 Difference]: Without dead ends: 74 [2018-10-14 16:24:34,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2018-10-14 16:24:34,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-14 16:24:34,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2018-10-14 16:24:34,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-14 16:24:34,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-14 16:24:34,806 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 51 [2018-10-14 16:24:34,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:24:34,807 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-14 16:24:34,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-14 16:24:34,807 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-14 16:24:34,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-14 16:24:34,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:24:34,810 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:24:34,810 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:24:34,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:24:34,811 INFO L82 PathProgramCache]: Analyzing trace with hash 349139816, now seen corresponding path program 1 times [2018-10-14 16:24:34,812 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:24:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:24:35,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:24:35,376 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:24:35,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-14 16:24:35,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-14 16:24:35,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-14 16:24:35,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2018-10-14 16:24:35,380 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 17 states. [2018-10-14 16:24:36,042 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-10-14 16:24:37,073 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-14 16:24:37,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:24:37,238 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-14 16:24:37,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-14 16:24:37,242 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2018-10-14 16:24:37,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:24:37,244 INFO L225 Difference]: With dead ends: 86 [2018-10-14 16:24:37,244 INFO L226 Difference]: Without dead ends: 86 [2018-10-14 16:24:37,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=388, Invalid=1094, Unknown=0, NotChecked=0, Total=1482 [2018-10-14 16:24:37,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-14 16:24:37,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2018-10-14 16:24:37,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-14 16:24:37,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-14 16:24:37,256 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 63 [2018-10-14 16:24:37,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:24:37,256 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-14 16:24:37,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-14 16:24:37,257 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-14 16:24:37,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-14 16:24:37,259 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:24:37,259 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:24:37,259 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:24:37,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:24:37,260 INFO L82 PathProgramCache]: Analyzing trace with hash -939247762, now seen corresponding path program 2 times [2018-10-14 16:24:37,261 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:24:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:24:37,896 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:24:37,897 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:24:37,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-14 16:24:37,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-14 16:24:37,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-14 16:24:37,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2018-10-14 16:24:37,899 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 20 states. [2018-10-14 16:24:38,824 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2018-10-14 16:24:39,296 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-14 16:24:39,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:24:39,781 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-14 16:24:39,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-14 16:24:39,783 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2018-10-14 16:24:39,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:24:39,785 INFO L225 Difference]: With dead ends: 98 [2018-10-14 16:24:39,785 INFO L226 Difference]: Without dead ends: 98 [2018-10-14 16:24:39,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=471, Invalid=1509, Unknown=0, NotChecked=0, Total=1980 [2018-10-14 16:24:39,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-14 16:24:39,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2018-10-14 16:24:39,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-14 16:24:39,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-14 16:24:39,795 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 75 [2018-10-14 16:24:39,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:24:39,796 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-14 16:24:39,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-14 16:24:39,796 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-14 16:24:39,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-14 16:24:39,798 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:24:39,798 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:24:39,798 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:24:39,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:24:39,799 INFO L82 PathProgramCache]: Analyzing trace with hash 893723252, now seen corresponding path program 3 times [2018-10-14 16:24:39,800 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:24:39,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:24:40,425 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:24:40,426 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:24:40,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-14 16:24:40,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-14 16:24:40,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-14 16:24:40,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2018-10-14 16:24:40,427 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 22 states. [2018-10-14 16:24:42,261 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-14 16:24:43,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:24:43,192 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-14 16:24:43,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-14 16:24:43,193 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 87 [2018-10-14 16:24:43,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:24:43,196 INFO L225 Difference]: With dead ends: 110 [2018-10-14 16:24:43,196 INFO L226 Difference]: Without dead ends: 110 [2018-10-14 16:24:43,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=547, Invalid=1903, Unknown=0, NotChecked=0, Total=2450 [2018-10-14 16:24:43,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-14 16:24:43,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2018-10-14 16:24:43,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-14 16:24:43,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-14 16:24:43,205 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 87 [2018-10-14 16:24:43,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:24:43,206 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-14 16:24:43,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-14 16:24:43,207 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-14 16:24:43,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-14 16:24:43,208 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:24:43,209 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:24:43,209 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:24:43,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:24:43,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1601194886, now seen corresponding path program 4 times [2018-10-14 16:24:43,210 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:24:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:24:43,764 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:24:43,765 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:24:43,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-14 16:24:43,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-14 16:24:43,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-14 16:24:43,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2018-10-14 16:24:43,766 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 24 states. [2018-10-14 16:24:46,534 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2018-10-14 16:24:46,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:24:46,625 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-10-14 16:24:46,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-14 16:24:46,630 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 99 [2018-10-14 16:24:46,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:24:46,632 INFO L225 Difference]: With dead ends: 122 [2018-10-14 16:24:46,632 INFO L226 Difference]: Without dead ends: 122 [2018-10-14 16:24:46,633 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=623, Invalid=2347, Unknown=0, NotChecked=0, Total=2970 [2018-10-14 16:24:46,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-14 16:24:46,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 112. [2018-10-14 16:24:46,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-14 16:24:46,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-14 16:24:46,641 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 99 [2018-10-14 16:24:46,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:24:46,641 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-14 16:24:46,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-14 16:24:46,642 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-14 16:24:46,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-14 16:24:46,643 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:24:46,644 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:24:46,644 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:24:46,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:24:46,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1113494144, now seen corresponding path program 5 times [2018-10-14 16:24:46,645 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:24:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:24:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:24:47,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:24:47,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-14 16:24:47,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-14 16:24:47,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-14 16:24:47,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2018-10-14 16:24:47,205 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 28 states. [2018-10-14 16:24:49,186 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:24:49,688 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:24:50,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:24:50,837 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-10-14 16:24:50,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-14 16:24:50,838 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 111 [2018-10-14 16:24:50,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:24:50,840 INFO L225 Difference]: With dead ends: 134 [2018-10-14 16:24:50,840 INFO L226 Difference]: Without dead ends: 134 [2018-10-14 16:24:50,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1004, Invalid=3156, Unknown=0, NotChecked=0, Total=4160 [2018-10-14 16:24:50,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-14 16:24:50,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 124. [2018-10-14 16:24:50,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-14 16:24:50,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-10-14 16:24:50,849 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 111 [2018-10-14 16:24:50,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:24:50,849 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-10-14 16:24:50,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-14 16:24:50,850 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-10-14 16:24:50,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-14 16:24:50,851 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:24:50,852 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:24:50,852 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:24:50,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:24:50,852 INFO L82 PathProgramCache]: Analyzing trace with hash 267898246, now seen corresponding path program 6 times [2018-10-14 16:24:50,853 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:24:50,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:24:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:24:51,590 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:24:51,590 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-10-14 16:24:51,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-14 16:24:51,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-14 16:24:51,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2018-10-14 16:24:51,591 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 30 states. [2018-10-14 16:24:53,352 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2018-10-14 16:24:53,983 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-14 16:24:54,316 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:24:55,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:24:55,881 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-10-14 16:24:55,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-14 16:24:55,882 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 123 [2018-10-14 16:24:55,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:24:55,884 INFO L225 Difference]: With dead ends: 146 [2018-10-14 16:24:55,884 INFO L226 Difference]: Without dead ends: 146 [2018-10-14 16:24:55,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1064, Invalid=3628, Unknown=0, NotChecked=0, Total=4692 [2018-10-14 16:24:55,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-14 16:24:55,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 136. [2018-10-14 16:24:55,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-14 16:24:55,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-10-14 16:24:55,895 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 123 [2018-10-14 16:24:55,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:24:55,896 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-10-14 16:24:55,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-14 16:24:55,896 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-10-14 16:24:55,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-14 16:24:55,898 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:24:55,898 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:24:55,899 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:24:55,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:24:55,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1255167116, now seen corresponding path program 7 times [2018-10-14 16:24:55,900 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:24:55,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:24:57,273 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-14 16:24:58,068 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:24:58,068 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:24:58,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-14 16:24:58,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-14 16:24:58,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-14 16:24:58,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2018-10-14 16:24:58,070 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 32 states. [2018-10-14 16:24:59,003 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-14 16:25:01,805 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:25:03,109 WARN L179 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2018-10-14 16:25:03,382 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2018-10-14 16:25:03,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:25:03,857 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-10-14 16:25:03,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-14 16:25:03,857 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 135 [2018-10-14 16:25:03,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:25:03,859 INFO L225 Difference]: With dead ends: 158 [2018-10-14 16:25:03,860 INFO L226 Difference]: Without dead ends: 158 [2018-10-14 16:25:03,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1413, Invalid=4439, Unknown=0, NotChecked=0, Total=5852 [2018-10-14 16:25:03,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-14 16:25:03,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2018-10-14 16:25:03,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-14 16:25:03,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-14 16:25:03,867 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 135 [2018-10-14 16:25:03,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:25:03,867 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-14 16:25:03,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-14 16:25:03,868 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-14 16:25:03,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-14 16:25:03,870 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:25:03,870 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:25:03,870 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:25:03,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:25:03,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1322745198, now seen corresponding path program 8 times [2018-10-14 16:25:03,872 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:25:03,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:25:04,660 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:25:04,661 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:25:04,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-14 16:25:04,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-14 16:25:04,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-14 16:25:04,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2018-10-14 16:25:04,663 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 32 states. [2018-10-14 16:25:09,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:25:09,438 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2018-10-14 16:25:09,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-14 16:25:09,438 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 147 [2018-10-14 16:25:09,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:25:09,440 INFO L225 Difference]: With dead ends: 170 [2018-10-14 16:25:09,440 INFO L226 Difference]: Without dead ends: 170 [2018-10-14 16:25:09,442 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=927, Invalid=4623, Unknown=0, NotChecked=0, Total=5550 [2018-10-14 16:25:09,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-14 16:25:09,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2018-10-14 16:25:09,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-14 16:25:09,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-10-14 16:25:09,447 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 147 [2018-10-14 16:25:09,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:25:09,447 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-10-14 16:25:09,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-14 16:25:09,448 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-10-14 16:25:09,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-14 16:25:09,450 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:25:09,450 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:25:09,450 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:25:09,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:25:09,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1975375768, now seen corresponding path program 9 times [2018-10-14 16:25:09,451 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:25:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:25:10,348 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:25:10,349 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:25:10,349 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-10-14 16:25:10,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-14 16:25:10,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-14 16:25:10,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2018-10-14 16:25:10,350 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 36 states. [2018-10-14 16:25:13,588 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:25:13,803 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:25:16,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:25:16,214 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2018-10-14 16:25:16,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-14 16:25:16,214 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 159 [2018-10-14 16:25:16,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:25:16,216 INFO L225 Difference]: With dead ends: 182 [2018-10-14 16:25:16,216 INFO L226 Difference]: Without dead ends: 182 [2018-10-14 16:25:16,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1890, Invalid=5942, Unknown=0, NotChecked=0, Total=7832 [2018-10-14 16:25:16,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-14 16:25:16,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 172. [2018-10-14 16:25:16,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-10-14 16:25:16,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2018-10-14 16:25:16,223 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 159 [2018-10-14 16:25:16,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:25:16,223 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2018-10-14 16:25:16,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-14 16:25:16,224 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2018-10-14 16:25:16,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-14 16:25:16,225 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:25:16,225 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:25:16,225 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:25:16,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:25:16,226 INFO L82 PathProgramCache]: Analyzing trace with hash 453890974, now seen corresponding path program 10 times [2018-10-14 16:25:16,226 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:25:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:25:17,127 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:25:17,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:25:17,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-14 16:25:17,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-14 16:25:17,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-14 16:25:17,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2018-10-14 16:25:17,130 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 38 states. [2018-10-14 16:25:18,997 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2018-10-14 16:25:19,690 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:25:20,607 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:25:20,764 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:25:21,385 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:25:23,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:25:23,724 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2018-10-14 16:25:23,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-14 16:25:23,727 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 171 [2018-10-14 16:25:23,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:25:23,728 INFO L225 Difference]: With dead ends: 194 [2018-10-14 16:25:23,728 INFO L226 Difference]: Without dead ends: 194 [2018-10-14 16:25:23,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1966, Invalid=6590, Unknown=0, NotChecked=0, Total=8556 [2018-10-14 16:25:23,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-14 16:25:23,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 184. [2018-10-14 16:25:23,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-14 16:25:23,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2018-10-14 16:25:23,735 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 171 [2018-10-14 16:25:23,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:25:23,736 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2018-10-14 16:25:23,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-14 16:25:23,736 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2018-10-14 16:25:23,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-14 16:25:23,737 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:25:23,737 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:25:23,737 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:25:23,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:25:23,738 INFO L82 PathProgramCache]: Analyzing trace with hash -749341020, now seen corresponding path program 11 times [2018-10-14 16:25:23,739 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:25:23,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:25:24,839 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:25:24,839 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:25:24,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-14 16:25:24,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-14 16:25:24,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-14 16:25:24,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1349, Unknown=0, NotChecked=0, Total=1560 [2018-10-14 16:25:24,841 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand 40 states. [2018-10-14 16:25:29,051 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:25:32,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:25:32,304 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2018-10-14 16:25:32,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-14 16:25:32,305 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 183 [2018-10-14 16:25:32,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:25:32,307 INFO L225 Difference]: With dead ends: 206 [2018-10-14 16:25:32,307 INFO L226 Difference]: Without dead ends: 206 [2018-10-14 16:25:32,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2435, Invalid=7665, Unknown=0, NotChecked=0, Total=10100 [2018-10-14 16:25:32,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-10-14 16:25:32,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 196. [2018-10-14 16:25:32,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-14 16:25:32,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2018-10-14 16:25:32,314 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 183 [2018-10-14 16:25:32,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:25:32,314 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2018-10-14 16:25:32,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-14 16:25:32,315 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2018-10-14 16:25:32,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-10-14 16:25:32,316 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:25:32,316 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:25:32,316 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:25:32,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:25:32,317 INFO L82 PathProgramCache]: Analyzing trace with hash -527187798, now seen corresponding path program 12 times [2018-10-14 16:25:32,317 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:25:32,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:25:33,430 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:25:33,431 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:25:33,431 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-10-14 16:25:33,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-14 16:25:33,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-14 16:25:33,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2018-10-14 16:25:33,432 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 42 states. [2018-10-14 16:25:37,393 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-14 16:25:37,562 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:25:38,031 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:25:38,199 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:25:38,634 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:25:38,805 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:25:39,289 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:25:39,521 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-14 16:25:39,966 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-14 16:25:40,131 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-14 16:25:40,453 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-14 16:25:41,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:25:41,765 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2018-10-14 16:25:41,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-14 16:25:41,766 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 195 [2018-10-14 16:25:41,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:25:41,767 INFO L225 Difference]: With dead ends: 218 [2018-10-14 16:25:41,768 INFO L226 Difference]: Without dead ends: 218 [2018-10-14 16:25:41,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2105 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=2185, Invalid=8321, Unknown=0, NotChecked=0, Total=10506 [2018-10-14 16:25:41,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-10-14 16:25:41,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 208. [2018-10-14 16:25:41,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-14 16:25:41,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2018-10-14 16:25:41,773 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 195 [2018-10-14 16:25:41,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:25:41,773 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2018-10-14 16:25:41,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-14 16:25:41,773 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2018-10-14 16:25:41,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-14 16:25:41,774 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:25:41,775 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:25:41,775 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:25:41,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:25:41,775 INFO L82 PathProgramCache]: Analyzing trace with hash -192630352, now seen corresponding path program 13 times [2018-10-14 16:25:41,776 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:25:41,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:25:42,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:25:42,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:25:42,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-14 16:25:42,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-14 16:25:42,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-14 16:25:42,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1625, Unknown=0, NotChecked=0, Total=1892 [2018-10-14 16:25:42,862 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 44 states. [2018-10-14 16:25:44,421 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2018-10-14 16:25:49,733 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-14 16:25:51,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:25:51,557 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2018-10-14 16:25:51,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-14 16:25:51,558 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 207 [2018-10-14 16:25:51,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:25:51,559 INFO L225 Difference]: With dead ends: 230 [2018-10-14 16:25:51,559 INFO L226 Difference]: Without dead ends: 230 [2018-10-14 16:25:51,561 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2716 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=3048, Invalid=9608, Unknown=0, NotChecked=0, Total=12656 [2018-10-14 16:25:51,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-10-14 16:25:51,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 220. [2018-10-14 16:25:51,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-14 16:25:51,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 220 transitions. [2018-10-14 16:25:51,564 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 220 transitions. Word has length 207 [2018-10-14 16:25:51,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:25:51,565 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 220 transitions. [2018-10-14 16:25:51,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-14 16:25:51,565 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 220 transitions. [2018-10-14 16:25:51,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-14 16:25:51,566 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:25:51,566 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:25:51,567 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:25:51,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:25:51,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1868150346, now seen corresponding path program 14 times [2018-10-14 16:25:51,568 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:25:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:25:52,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:25:52,869 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:25:52,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-14 16:25:52,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-14 16:25:52,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-14 16:25:52,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1799, Unknown=0, NotChecked=0, Total=2070 [2018-10-14 16:25:52,870 INFO L87 Difference]: Start difference. First operand 220 states and 220 transitions. Second operand 46 states. [2018-10-14 16:25:58,825 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:25:59,608 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:26:02,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:26:02,394 INFO L93 Difference]: Finished difference Result 242 states and 242 transitions. [2018-10-14 16:26:02,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-14 16:26:02,395 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 219 [2018-10-14 16:26:02,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:26:02,397 INFO L225 Difference]: With dead ends: 242 [2018-10-14 16:26:02,397 INFO L226 Difference]: Without dead ends: 242 [2018-10-14 16:26:02,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2906 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=3140, Invalid=10432, Unknown=0, NotChecked=0, Total=13572 [2018-10-14 16:26:02,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-10-14 16:26:02,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 232. [2018-10-14 16:26:02,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-10-14 16:26:02,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2018-10-14 16:26:02,402 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 219 [2018-10-14 16:26:02,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:26:02,403 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2018-10-14 16:26:02,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-14 16:26:02,403 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2018-10-14 16:26:02,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-10-14 16:26:02,404 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:26:02,405 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:26:02,405 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:26:02,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:26:02,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1714817212, now seen corresponding path program 15 times [2018-10-14 16:26:02,406 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:26:02,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:26:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:26:03,875 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:26:03,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-14 16:26:03,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-14 16:26:03,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-14 16:26:03,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1925, Unknown=0, NotChecked=0, Total=2256 [2018-10-14 16:26:03,877 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand 48 states. [2018-10-14 16:26:10,096 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:26:10,288 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:26:13,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:26:13,688 INFO L93 Difference]: Finished difference Result 254 states and 254 transitions. [2018-10-14 16:26:13,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-14 16:26:13,691 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 231 [2018-10-14 16:26:13,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:26:13,692 INFO L225 Difference]: With dead ends: 254 [2018-10-14 16:26:13,692 INFO L226 Difference]: Without dead ends: 254 [2018-10-14 16:26:13,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3423 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=3729, Invalid=11771, Unknown=0, NotChecked=0, Total=15500 [2018-10-14 16:26:13,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-10-14 16:26:13,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 244. [2018-10-14 16:26:13,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-10-14 16:26:13,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 244 transitions. [2018-10-14 16:26:13,697 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 244 transitions. Word has length 231 [2018-10-14 16:26:13,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:26:13,698 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 244 transitions. [2018-10-14 16:26:13,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-14 16:26:13,698 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 244 transitions. [2018-10-14 16:26:13,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-14 16:26:13,699 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:26:13,700 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:26:13,700 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:26:13,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:26:13,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1238274366, now seen corresponding path program 16 times [2018-10-14 16:26:13,701 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:26:13,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:26:15,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:26:15,650 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:26:15,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-14 16:26:15,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-14 16:26:15,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-14 16:26:15,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2122, Unknown=0, NotChecked=0, Total=2256 [2018-10-14 16:26:15,651 INFO L87 Difference]: Start difference. First operand 244 states and 244 transitions. Second operand 48 states. [2018-10-14 16:26:26,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:26:26,344 INFO L93 Difference]: Finished difference Result 266 states and 266 transitions. [2018-10-14 16:26:26,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-14 16:26:26,345 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 243 [2018-10-14 16:26:26,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:26:26,348 INFO L225 Difference]: With dead ends: 266 [2018-10-14 16:26:26,348 INFO L226 Difference]: Without dead ends: 266 [2018-10-14 16:26:26,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2323 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1535, Invalid=11575, Unknown=0, NotChecked=0, Total=13110 [2018-10-14 16:26:26,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-10-14 16:26:26,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 256. [2018-10-14 16:26:26,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-10-14 16:26:26,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 256 transitions. [2018-10-14 16:26:26,354 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 256 transitions. Word has length 243 [2018-10-14 16:26:26,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:26:26,354 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 256 transitions. [2018-10-14 16:26:26,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-14 16:26:26,354 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 256 transitions. [2018-10-14 16:26:26,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-10-14 16:26:26,356 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:26:26,356 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:26:26,356 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:26:26,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:26:26,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1319765048, now seen corresponding path program 17 times [2018-10-14 16:26:26,357 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:26:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:26:27,080 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-14 16:26:28,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:26:28,772 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:26:28,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-10-14 16:26:28,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-14 16:26:28,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-14 16:26:28,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=2249, Unknown=0, NotChecked=0, Total=2652 [2018-10-14 16:26:28,773 INFO L87 Difference]: Start difference. First operand 256 states and 256 transitions. Second operand 52 states. [2018-10-14 16:26:34,035 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:26:35,673 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-14 16:26:41,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:26:41,639 INFO L93 Difference]: Finished difference Result 278 states and 278 transitions. [2018-10-14 16:26:41,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-14 16:26:41,640 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 255 [2018-10-14 16:26:41,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:26:41,641 INFO L225 Difference]: With dead ends: 278 [2018-10-14 16:26:41,641 INFO L226 Difference]: Without dead ends: 278 [2018-10-14 16:26:41,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4214 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=4478, Invalid=14154, Unknown=0, NotChecked=0, Total=18632 [2018-10-14 16:26:41,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-10-14 16:26:41,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 268. [2018-10-14 16:26:41,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-10-14 16:26:41,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 268 transitions. [2018-10-14 16:26:41,647 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 268 transitions. Word has length 255 [2018-10-14 16:26:41,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:26:41,648 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 268 transitions. [2018-10-14 16:26:41,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-14 16:26:41,648 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 268 transitions. [2018-10-14 16:26:41,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-10-14 16:26:41,649 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:26:41,650 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:26:41,650 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:26:41,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:26:41,650 INFO L82 PathProgramCache]: Analyzing trace with hash -668913714, now seen corresponding path program 18 times [2018-10-14 16:26:41,651 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:26:41,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:26:43,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:26:43,382 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:26:43,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-10-14 16:26:43,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-14 16:26:43,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-14 16:26:43,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2455, Unknown=0, NotChecked=0, Total=2862 [2018-10-14 16:26:43,384 INFO L87 Difference]: Start difference. First operand 268 states and 268 transitions. Second operand 54 states. [2018-10-14 16:26:45,762 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2018-10-14 16:26:50,917 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:26:51,157 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:26:56,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:26:56,369 INFO L93 Difference]: Finished difference Result 290 states and 290 transitions. [2018-10-14 16:26:56,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-14 16:26:56,370 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 267 [2018-10-14 16:26:56,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:26:56,372 INFO L225 Difference]: With dead ends: 290 [2018-10-14 16:26:56,372 INFO L226 Difference]: Without dead ends: 290 [2018-10-14 16:26:56,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4448 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=4586, Invalid=15154, Unknown=0, NotChecked=0, Total=19740 [2018-10-14 16:26:56,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-10-14 16:26:56,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 280. [2018-10-14 16:26:56,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-10-14 16:26:56,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 280 transitions. [2018-10-14 16:26:56,378 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 280 transitions. Word has length 267 [2018-10-14 16:26:56,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:26:56,378 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 280 transitions. [2018-10-14 16:26:56,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-14 16:26:56,379 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 280 transitions. [2018-10-14 16:26:56,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-10-14 16:26:56,380 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:26:56,380 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:26:56,380 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:26:56,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:26:56,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1523616468, now seen corresponding path program 19 times [2018-10-14 16:26:56,381 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:26:56,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:26:58,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:26:58,183 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:26:58,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-10-14 16:26:58,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-14 16:26:58,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-14 16:26:58,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=2597, Unknown=0, NotChecked=0, Total=3080 [2018-10-14 16:26:58,184 INFO L87 Difference]: Start difference. First operand 280 states and 280 transitions. Second operand 56 states. [2018-10-14 16:27:01,160 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:27:01,316 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:27:04,259 WARN L179 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-14 16:27:06,207 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:27:06,440 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:27:12,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:27:12,369 INFO L93 Difference]: Finished difference Result 302 states and 302 transitions. [2018-10-14 16:27:12,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-14 16:27:12,369 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 279 [2018-10-14 16:27:12,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:27:12,371 INFO L225 Difference]: With dead ends: 302 [2018-10-14 16:27:12,371 INFO L226 Difference]: Without dead ends: 302 [2018-10-14 16:27:12,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5089 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=5295, Invalid=16757, Unknown=0, NotChecked=0, Total=22052 [2018-10-14 16:27:12,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2018-10-14 16:27:12,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 292. [2018-10-14 16:27:12,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-10-14 16:27:12,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 292 transitions. [2018-10-14 16:27:12,376 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 292 transitions. Word has length 279 [2018-10-14 16:27:12,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:27:12,377 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 292 transitions. [2018-10-14 16:27:12,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-14 16:27:12,377 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 292 transitions. [2018-10-14 16:27:12,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-10-14 16:27:12,378 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:27:12,378 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:27:12,379 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:27:12,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:27:12,379 INFO L82 PathProgramCache]: Analyzing trace with hash 2036436186, now seen corresponding path program 20 times [2018-10-14 16:27:12,380 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:27:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:27:14,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:27:14,503 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:27:14,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-10-14 16:27:14,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-14 16:27:14,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-14 16:27:14,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=2891, Unknown=0, NotChecked=0, Total=3306 [2018-10-14 16:27:14,504 INFO L87 Difference]: Start difference. First operand 292 states and 292 transitions. Second operand 58 states. [2018-10-14 16:27:19,101 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-14 16:27:19,272 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:27:19,779 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:27:19,948 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:27:20,404 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:27:20,583 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:27:21,056 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:27:21,237 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:27:21,787 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:27:22,010 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:27:22,505 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:27:22,698 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:27:23,209 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:27:23,415 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:27:23,935 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:27:24,144 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:27:24,688 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:27:24,906 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:27:25,460 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:27:25,682 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:27:26,262 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:27:26,504 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:27:26,731 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-14 16:27:26,994 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-14 16:27:27,227 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:27:27,462 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-14 16:27:28,036 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-14 16:27:28,260 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-14 16:27:28,668 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-14 16:27:28,889 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-14 16:27:30,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:27:30,473 INFO L93 Difference]: Finished difference Result 314 states and 314 transitions. [2018-10-14 16:27:30,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-14 16:27:30,473 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 291 [2018-10-14 16:27:30,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:27:30,475 INFO L225 Difference]: With dead ends: 314 [2018-10-14 16:27:30,475 INFO L226 Difference]: Without dead ends: 314 [2018-10-14 16:27:30,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5093 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=4885, Invalid=17765, Unknown=0, NotChecked=0, Total=22650 [2018-10-14 16:27:30,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2018-10-14 16:27:30,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 304. [2018-10-14 16:27:30,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-10-14 16:27:30,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 304 transitions. [2018-10-14 16:27:30,481 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 304 transitions. Word has length 291 [2018-10-14 16:27:30,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:27:30,482 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 304 transitions. [2018-10-14 16:27:30,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-14 16:27:30,482 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 304 transitions. [2018-10-14 16:27:30,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-10-14 16:27:30,483 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:27:30,484 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:27:30,484 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:27:30,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:27:30,484 INFO L82 PathProgramCache]: Analyzing trace with hash -476989984, now seen corresponding path program 21 times [2018-10-14 16:27:30,485 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:27:30,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:27:33,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:27:33,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:27:33,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-10-14 16:27:33,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-14 16:27:33,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-14 16:27:33,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=2969, Unknown=0, NotChecked=0, Total=3540 [2018-10-14 16:27:33,621 INFO L87 Difference]: Start difference. First operand 304 states and 304 transitions. Second operand 60 states. [2018-10-14 16:27:37,290 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:27:42,203 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:27:47,240 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2018-10-14 16:27:48,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:27:48,475 INFO L93 Difference]: Finished difference Result 326 states and 326 transitions. [2018-10-14 16:27:48,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-14 16:27:48,477 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 303 [2018-10-14 16:27:48,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:27:48,478 INFO L225 Difference]: With dead ends: 326 [2018-10-14 16:27:48,478 INFO L226 Difference]: Without dead ends: 326 [2018-10-14 16:27:48,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6048 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=6180, Invalid=19580, Unknown=0, NotChecked=0, Total=25760 [2018-10-14 16:27:48,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2018-10-14 16:27:48,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 316. [2018-10-14 16:27:48,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-10-14 16:27:48,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 316 transitions. [2018-10-14 16:27:48,484 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 316 transitions. Word has length 303 [2018-10-14 16:27:48,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:27:48,485 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 316 transitions. [2018-10-14 16:27:48,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-14 16:27:48,485 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 316 transitions. [2018-10-14 16:27:48,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-10-14 16:27:48,487 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:27:48,487 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:27:48,487 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:27:48,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:27:48,487 INFO L82 PathProgramCache]: Analyzing trace with hash 417236454, now seen corresponding path program 22 times [2018-10-14 16:27:48,488 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:27:48,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:27:51,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:27:51,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:27:51,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-10-14 16:27:51,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-14 16:27:51,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-14 16:27:51,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=3207, Unknown=0, NotChecked=0, Total=3782 [2018-10-14 16:27:51,064 INFO L87 Difference]: Start difference. First operand 316 states and 316 transitions. Second operand 62 states. [2018-10-14 16:27:55,700 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:27:56,271 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:27:56,859 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:27:57,512 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:27:58,188 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:27:58,833 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:28:02,549 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:28:02,769 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-14 16:28:03,197 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:28:03,960 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:28:07,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:28:07,545 INFO L93 Difference]: Finished difference Result 338 states and 338 transitions. [2018-10-14 16:28:07,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-14 16:28:07,548 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 315 [2018-10-14 16:28:07,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:28:07,550 INFO L225 Difference]: With dead ends: 338 [2018-10-14 16:28:07,550 INFO L226 Difference]: Without dead ends: 338 [2018-10-14 16:28:07,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6326 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=6304, Invalid=20756, Unknown=0, NotChecked=0, Total=27060 [2018-10-14 16:28:07,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-10-14 16:28:07,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 328. [2018-10-14 16:28:07,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-10-14 16:28:07,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 328 transitions. [2018-10-14 16:28:07,556 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 328 transitions. Word has length 315 [2018-10-14 16:28:07,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:28:07,556 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 328 transitions. [2018-10-14 16:28:07,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-14 16:28:07,556 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 328 transitions. [2018-10-14 16:28:07,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-10-14 16:28:07,558 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:28:07,558 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:28:07,558 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:28:07,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:28:07,559 INFO L82 PathProgramCache]: Analyzing trace with hash -930775828, now seen corresponding path program 23 times [2018-10-14 16:28:07,559 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:28:07,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:28:09,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:28:09,884 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:28:09,884 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-10-14 16:28:09,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-14 16:28:09,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-14 16:28:09,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=667, Invalid=3365, Unknown=0, NotChecked=0, Total=4032 [2018-10-14 16:28:09,885 INFO L87 Difference]: Start difference. First operand 328 states and 328 transitions. Second operand 64 states. [2018-10-14 16:28:12,831 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-14 16:28:23,351 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:28:27,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:28:27,078 INFO L93 Difference]: Finished difference Result 350 states and 350 transitions. [2018-10-14 16:28:27,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-10-14 16:28:27,079 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 327 [2018-10-14 16:28:27,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:28:27,081 INFO L225 Difference]: With dead ends: 350 [2018-10-14 16:28:27,081 INFO L226 Difference]: Without dead ends: 350 [2018-10-14 16:28:27,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7091 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=7133, Invalid=22623, Unknown=0, NotChecked=0, Total=29756 [2018-10-14 16:28:27,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2018-10-14 16:28:27,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 340. [2018-10-14 16:28:27,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-10-14 16:28:27,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 340 transitions. [2018-10-14 16:28:27,087 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 340 transitions. Word has length 327 [2018-10-14 16:28:27,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:28:27,088 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 340 transitions. [2018-10-14 16:28:27,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-14 16:28:27,088 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 340 transitions. [2018-10-14 16:28:27,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-10-14 16:28:27,089 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:28:27,090 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:28:27,090 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:28:27,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:28:27,090 INFO L82 PathProgramCache]: Analyzing trace with hash 830741234, now seen corresponding path program 24 times [2018-10-14 16:28:27,091 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:28:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:28:30,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:28:30,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:28:30,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-10-14 16:28:30,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-14 16:28:30,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-14 16:28:30,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=3859, Unknown=0, NotChecked=0, Total=4290 [2018-10-14 16:28:30,418 INFO L87 Difference]: Start difference. First operand 340 states and 340 transitions. Second operand 66 states. [2018-10-14 16:28:33,336 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2018-10-14 16:28:33,529 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2018-10-14 16:28:34,260 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2018-10-14 16:28:34,819 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2018-10-14 16:28:34,992 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 49 [2018-10-14 16:28:35,560 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 49 [2018-10-14 16:28:35,744 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 49 [2018-10-14 16:28:36,340 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 49 [2018-10-14 16:28:36,582 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 49 [2018-10-14 16:28:37,208 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 49 [2018-10-14 16:28:37,423 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 49 [2018-10-14 16:28:38,100 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 56 [2018-10-14 16:28:38,370 WARN L179 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 16:28:38,625 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 16:28:38,844 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 16:28:39,087 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 16:28:39,326 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 16:28:39,495 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 16:28:39,698 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 16:28:39,943 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 16:28:40,192 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 16:28:40,369 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 16:28:40,554 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 16:28:40,807 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 16:28:41,062 WARN L179 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 16:28:41,248 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 16:28:41,440 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 16:28:41,698 WARN L179 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 16:28:41,962 WARN L179 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 16:28:42,155 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 16:28:42,350 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 16:28:42,612 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 16:28:42,880 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 16:28:43,072 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 16:28:43,267 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 16:28:43,584 WARN L179 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 16:28:43,901 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-14 16:28:44,100 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-14 16:28:44,299 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-14 16:28:44,582 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-14 16:28:44,862 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 58 [2018-10-14 16:28:45,058 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2018-10-14 16:28:45,255 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2018-10-14 16:28:45,529 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 57 [2018-10-14 16:28:45,804 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 58 [2018-10-14 16:28:46,281 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 57 [2018-10-14 16:28:46,546 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 58 [2018-10-14 16:28:47,017 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 57 [2018-10-14 16:28:47,275 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2018-10-14 16:28:47,719 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2018-10-14 16:28:47,974 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2018-10-14 16:28:48,417 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2018-10-14 16:28:48,683 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2018-10-14 16:28:49,193 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2018-10-14 16:28:49,849 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2018-10-14 16:28:51,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:28:51,033 INFO L93 Difference]: Finished difference Result 362 states and 362 transitions. [2018-10-14 16:28:51,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-14 16:28:51,034 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 339 [2018-10-14 16:28:51,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:28:51,035 INFO L225 Difference]: With dead ends: 362 [2018-10-14 16:28:51,035 INFO L226 Difference]: Without dead ends: 362 [2018-10-14 16:28:51,036 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6491 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=5471, Invalid=23599, Unknown=0, NotChecked=0, Total=29070 [2018-10-14 16:28:51,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2018-10-14 16:28:51,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 352. [2018-10-14 16:28:51,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-10-14 16:28:51,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 352 transitions. [2018-10-14 16:28:51,040 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 352 transitions. Word has length 339 [2018-10-14 16:28:51,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:28:51,041 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 352 transitions. [2018-10-14 16:28:51,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-14 16:28:51,041 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 352 transitions. [2018-10-14 16:28:51,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-10-14 16:28:51,043 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:28:51,043 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:28:51,043 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:28:51,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:28:51,044 INFO L82 PathProgramCache]: Analyzing trace with hash -2103975944, now seen corresponding path program 25 times [2018-10-14 16:28:51,044 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:28:51,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:28:54,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:28:54,116 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:28:54,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-10-14 16:28:54,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-14 16:28:54,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-14 16:28:54,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=771, Invalid=3785, Unknown=0, NotChecked=0, Total=4556 [2018-10-14 16:28:54,117 INFO L87 Difference]: Start difference. First operand 352 states and 352 transitions. Second operand 68 states. [2018-10-14 16:28:59,076 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:29:04,017 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:29:04,249 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:29:09,243 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:29:09,510 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:29:13,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:29:13,177 INFO L93 Difference]: Finished difference Result 374 states and 374 transitions. [2018-10-14 16:29:13,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-10-14 16:29:13,177 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 351 [2018-10-14 16:29:13,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:29:13,180 INFO L225 Difference]: With dead ends: 374 [2018-10-14 16:29:13,180 INFO L226 Difference]: Without dead ends: 374 [2018-10-14 16:29:13,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8218 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=8154, Invalid=25886, Unknown=0, NotChecked=0, Total=34040 [2018-10-14 16:29:13,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2018-10-14 16:29:13,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 364. [2018-10-14 16:29:13,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-10-14 16:29:13,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 364 transitions. [2018-10-14 16:29:13,186 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 364 transitions. Word has length 351 [2018-10-14 16:29:13,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:29:13,186 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 364 transitions. [2018-10-14 16:29:13,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-14 16:29:13,186 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 364 transitions. [2018-10-14 16:29:13,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-10-14 16:29:13,188 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:29:13,188 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:29:13,189 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:29:13,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:29:13,189 INFO L82 PathProgramCache]: Analyzing trace with hash 977161214, now seen corresponding path program 26 times [2018-10-14 16:29:13,190 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:29:13,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:29:16,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:29:16,182 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:29:16,182 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-10-14 16:29:16,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-14 16:29:16,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-14 16:29:16,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=775, Invalid=4055, Unknown=0, NotChecked=0, Total=4830 [2018-10-14 16:29:16,183 INFO L87 Difference]: Start difference. First operand 364 states and 364 transitions. Second operand 70 states. [2018-10-14 16:29:19,608 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:29:19,791 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:29:20,219 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:29:20,806 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:29:24,557 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-14 16:29:24,773 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:29:25,470 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:29:27,890 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:29:30,358 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:29:32,647 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:29:35,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:29:35,926 INFO L93 Difference]: Finished difference Result 386 states and 386 transitions. [2018-10-14 16:29:35,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-10-14 16:29:35,928 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 363 [2018-10-14 16:29:35,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:29:35,930 INFO L225 Difference]: With dead ends: 386 [2018-10-14 16:29:35,930 INFO L226 Difference]: Without dead ends: 386 [2018-10-14 16:29:35,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8540 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=8294, Invalid=27238, Unknown=0, NotChecked=0, Total=35532 [2018-10-14 16:29:35,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2018-10-14 16:29:35,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 376. [2018-10-14 16:29:35,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2018-10-14 16:29:35,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 376 transitions. [2018-10-14 16:29:35,936 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 376 transitions. Word has length 363 [2018-10-14 16:29:35,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:29:35,936 INFO L481 AbstractCegarLoop]: Abstraction has 376 states and 376 transitions. [2018-10-14 16:29:35,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-14 16:29:35,936 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 376 transitions. [2018-10-14 16:29:35,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-10-14 16:29:35,938 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:29:35,939 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:29:35,939 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:29:35,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:29:35,939 INFO L82 PathProgramCache]: Analyzing trace with hash -2034966780, now seen corresponding path program 27 times [2018-10-14 16:29:35,940 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:29:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:29:38,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:29:38,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:29:38,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-10-14 16:29:38,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-14 16:29:38,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-14 16:29:38,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=883, Invalid=4229, Unknown=0, NotChecked=0, Total=5112 [2018-10-14 16:29:38,527 INFO L87 Difference]: Start difference. First operand 376 states and 376 transitions. Second operand 72 states. [2018-10-14 16:29:45,019 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:29:50,202 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:29:55,197 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-14 16:29:59,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:29:59,748 INFO L93 Difference]: Finished difference Result 398 states and 398 transitions. [2018-10-14 16:29:59,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-14 16:29:59,749 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 375 [2018-10-14 16:29:59,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:29:59,751 INFO L225 Difference]: With dead ends: 398 [2018-10-14 16:29:59,751 INFO L226 Difference]: Without dead ends: 398 [2018-10-14 16:29:59,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9429 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=9243, Invalid=29369, Unknown=0, NotChecked=0, Total=38612 [2018-10-14 16:29:59,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2018-10-14 16:29:59,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 388. [2018-10-14 16:29:59,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-10-14 16:29:59,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 388 transitions. [2018-10-14 16:29:59,757 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 388 transitions. Word has length 375 [2018-10-14 16:29:59,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:29:59,758 INFO L481 AbstractCegarLoop]: Abstraction has 388 states and 388 transitions. [2018-10-14 16:29:59,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-14 16:29:59,758 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 388 transitions. [2018-10-14 16:29:59,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-10-14 16:29:59,760 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:29:59,760 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:29:59,760 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:29:59,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:29:59,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1510401782, now seen corresponding path program 28 times [2018-10-14 16:29:59,761 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:29:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:30:02,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:30:02,866 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:30:02,866 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-10-14 16:30:02,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-14 16:30:02,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-14 16:30:02,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=4619, Unknown=0, NotChecked=0, Total=5402 [2018-10-14 16:30:02,867 INFO L87 Difference]: Start difference. First operand 388 states and 388 transitions. Second operand 74 states. [2018-10-14 16:30:05,581 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2018-10-14 16:30:06,734 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-14 16:30:06,903 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:07,409 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:07,579 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:08,059 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:08,247 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:08,731 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:08,909 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:09,402 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:09,599 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:10,113 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:10,305 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:10,702 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-14 16:30:10,922 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:11,124 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:11,662 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:11,881 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:12,441 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:12,657 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:13,221 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:13,449 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:14,021 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:14,259 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:14,838 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:15,070 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:15,679 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:15,967 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:16,577 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:16,826 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:17,447 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:17,705 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:18,337 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:18,608 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:19,252 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:19,531 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:20,273 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:20,583 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:20,842 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-14 16:30:21,111 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-14 16:30:21,364 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:21,647 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-14 16:30:22,330 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-14 16:30:22,616 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-14 16:30:23,326 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-14 16:30:23,597 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-14 16:30:24,090 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-14 16:30:26,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:30:26,362 INFO L93 Difference]: Finished difference Result 410 states and 410 transitions. [2018-10-14 16:30:26,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-14 16:30:26,363 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 387 [2018-10-14 16:30:26,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:30:26,365 INFO L225 Difference]: With dead ends: 410 [2018-10-14 16:30:26,365 INFO L226 Difference]: Without dead ends: 410 [2018-10-14 16:30:26,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9425 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=8673, Invalid=30729, Unknown=0, NotChecked=0, Total=39402 [2018-10-14 16:30:26,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2018-10-14 16:30:26,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 400. [2018-10-14 16:30:26,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2018-10-14 16:30:26,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 400 transitions. [2018-10-14 16:30:26,371 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 400 transitions. Word has length 387 [2018-10-14 16:30:26,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:30:26,372 INFO L481 AbstractCegarLoop]: Abstraction has 400 states and 400 transitions. [2018-10-14 16:30:26,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-14 16:30:26,372 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 400 transitions. [2018-10-14 16:30:26,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-10-14 16:30:26,374 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:30:26,375 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:30:26,375 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:30:26,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:30:26,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1170766352, now seen corresponding path program 29 times [2018-10-14 16:30:26,376 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:30:26,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:30:29,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 5017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:30:29,327 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:30:29,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-10-14 16:30:29,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-14 16:30:29,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-14 16:30:29,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1003, Invalid=4697, Unknown=0, NotChecked=0, Total=5700 [2018-10-14 16:30:29,328 INFO L87 Difference]: Start difference. First operand 400 states and 400 transitions. Second operand 76 states. [2018-10-14 16:30:35,801 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:30:36,349 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-14 16:30:38,424 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:30:41,455 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:30:43,549 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:30:48,564 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:30:53,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:30:53,021 INFO L93 Difference]: Finished difference Result 422 states and 422 transitions. [2018-10-14 16:30:53,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-10-14 16:30:53,021 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 399 [2018-10-14 16:30:53,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:30:53,023 INFO L225 Difference]: With dead ends: 422 [2018-10-14 16:30:53,023 INFO L226 Difference]: Without dead ends: 422 [2018-10-14 16:30:53,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10724 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=10400, Invalid=33072, Unknown=0, NotChecked=0, Total=43472 [2018-10-14 16:30:53,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2018-10-14 16:30:53,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 412. [2018-10-14 16:30:53,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-10-14 16:30:53,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 412 transitions. [2018-10-14 16:30:53,028 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 412 transitions. Word has length 399 [2018-10-14 16:30:53,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:30:53,028 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 412 transitions. [2018-10-14 16:30:53,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-14 16:30:53,029 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 412 transitions. [2018-10-14 16:30:53,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-10-14 16:30:53,030 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:30:53,030 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:30:53,031 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:30:53,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:30:53,031 INFO L82 PathProgramCache]: Analyzing trace with hash -476020202, now seen corresponding path program 30 times [2018-10-14 16:30:53,031 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:30:53,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:30:56,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:30:56,183 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:30:56,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-10-14 16:30:56,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-14 16:30:56,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-14 16:30:56,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1007, Invalid=4999, Unknown=0, NotChecked=0, Total=6006 [2018-10-14 16:30:56,185 INFO L87 Difference]: Start difference. First operand 412 states and 412 transitions. Second operand 78 states. [2018-10-14 16:31:00,879 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:01,482 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:01,847 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-14 16:31:02,070 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-14 16:31:02,249 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:02,879 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:03,521 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:04,856 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:06,249 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:07,038 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:07,290 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:31:07,893 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:08,121 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:31:09,512 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:11,956 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:12,263 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:31:12,884 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:13,753 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:15,545 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:16,473 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:31:20,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:31:20,921 INFO L93 Difference]: Finished difference Result 434 states and 434 transitions. [2018-10-14 16:31:20,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-10-14 16:31:20,922 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 411 [2018-10-14 16:31:20,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:31:20,924 INFO L225 Difference]: With dead ends: 434 [2018-10-14 16:31:20,924 INFO L226 Difference]: Without dead ends: 434 [2018-10-14 16:31:20,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11090 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=10556, Invalid=34600, Unknown=0, NotChecked=0, Total=45156 [2018-10-14 16:31:20,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-10-14 16:31:20,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 424. [2018-10-14 16:31:20,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-10-14 16:31:20,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 424 transitions. [2018-10-14 16:31:20,931 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 424 transitions. Word has length 411 [2018-10-14 16:31:20,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:31:20,932 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 424 transitions. [2018-10-14 16:31:20,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-14 16:31:20,932 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 424 transitions. [2018-10-14 16:31:20,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-10-14 16:31:20,934 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:31:20,935 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:31:20,935 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:31:20,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:31:20,935 INFO L82 PathProgramCache]: Analyzing trace with hash 750694684, now seen corresponding path program 31 times [2018-10-14 16:31:20,936 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:31:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:31:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:31:24,833 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:31:24,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-14 16:31:24,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-14 16:31:24,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-14 16:31:24,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1131, Invalid=5189, Unknown=0, NotChecked=0, Total=6320 [2018-10-14 16:31:24,834 INFO L87 Difference]: Start difference. First operand 424 states and 424 transitions. Second operand 80 states. [2018-10-14 16:31:30,886 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:31:32,746 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:31:37,813 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:31:40,922 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:31:50,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:31:50,510 INFO L93 Difference]: Finished difference Result 446 states and 446 transitions. [2018-10-14 16:31:50,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-10-14 16:31:50,511 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 423 [2018-10-14 16:31:50,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:31:50,512 INFO L225 Difference]: With dead ends: 446 [2018-10-14 16:31:50,512 INFO L226 Difference]: Without dead ends: 446 [2018-10-14 16:31:50,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12103 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=11625, Invalid=36995, Unknown=0, NotChecked=0, Total=48620 [2018-10-14 16:31:50,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2018-10-14 16:31:50,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 436. [2018-10-14 16:31:50,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2018-10-14 16:31:50,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 436 transitions. [2018-10-14 16:31:50,536 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 436 transitions. Word has length 423 [2018-10-14 16:31:50,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:31:50,536 INFO L481 AbstractCegarLoop]: Abstraction has 436 states and 436 transitions. [2018-10-14 16:31:50,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-14 16:31:50,536 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 436 transitions. [2018-10-14 16:31:50,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-10-14 16:31:50,539 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:31:50,539 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:31:50,539 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:31:50,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:31:50,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1579190050, now seen corresponding path program 32 times [2018-10-14 16:31:50,540 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:31:50,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:31:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 0 proven. 6112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:31:55,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:31:55,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-14 16:31:55,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-14 16:31:55,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-14 16:31:55,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=6090, Unknown=0, NotChecked=0, Total=6320 [2018-10-14 16:31:55,831 INFO L87 Difference]: Start difference. First operand 436 states and 436 transitions. Second operand 80 states. [2018-10-14 16:32:26,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:32:26,522 INFO L93 Difference]: Finished difference Result 458 states and 458 transitions. [2018-10-14 16:32:26,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-10-14 16:32:26,522 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 435 [2018-10-14 16:32:26,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:32:26,524 INFO L225 Difference]: With dead ends: 458 [2018-10-14 16:32:26,524 INFO L226 Difference]: Without dead ends: 458 [2018-10-14 16:32:26,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6811 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=2751, Invalid=35079, Unknown=0, NotChecked=0, Total=37830 [2018-10-14 16:32:26,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2018-10-14 16:32:26,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 448. [2018-10-14 16:32:26,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2018-10-14 16:32:26,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 448 transitions. [2018-10-14 16:32:26,531 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 448 transitions. Word has length 435 [2018-10-14 16:32:26,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:32:26,531 INFO L481 AbstractCegarLoop]: Abstraction has 448 states and 448 transitions. [2018-10-14 16:32:26,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-14 16:32:26,531 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 448 transitions. [2018-10-14 16:32:26,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2018-10-14 16:32:26,534 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:32:26,534 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:32:26,534 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:32:26,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:32:26,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1534884824, now seen corresponding path program 33 times [2018-10-14 16:32:26,535 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:32:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:32:30,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:32:30,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:32:30,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2018-10-14 16:32:30,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-14 16:32:30,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-14 16:32:30,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1267, Invalid=5705, Unknown=0, NotChecked=0, Total=6972 [2018-10-14 16:32:30,636 INFO L87 Difference]: Start difference. First operand 448 states and 448 transitions. Second operand 84 states. [2018-10-14 16:32:33,958 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-14 16:32:34,131 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:32:38,005 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:32:44,393 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:32:49,294 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:32:49,617 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-14 16:32:54,739 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-14 16:32:55,961 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-14 16:32:58,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:32:58,733 INFO L93 Difference]: Finished difference Result 470 states and 470 transitions. [2018-10-14 16:32:58,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-10-14 16:32:58,733 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 447 [2018-10-14 16:32:58,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:32:58,735 INFO L225 Difference]: With dead ends: 470 [2018-10-14 16:32:58,735 INFO L226 Difference]: Without dead ends: 470 [2018-10-14 16:32:58,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13566 ImplicationChecksByTransitivity, 28.3s TimeCoverageRelationStatistics Valid=12918, Invalid=41138, Unknown=0, NotChecked=0, Total=54056 [2018-10-14 16:32:58,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2018-10-14 16:32:58,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 460. [2018-10-14 16:32:58,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2018-10-14 16:32:58,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 460 transitions. [2018-10-14 16:32:58,741 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 460 transitions. Word has length 447 [2018-10-14 16:32:58,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:32:58,742 INFO L481 AbstractCegarLoop]: Abstraction has 460 states and 460 transitions. [2018-10-14 16:32:58,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-14 16:32:58,742 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 460 transitions. [2018-10-14 16:32:58,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2018-10-14 16:32:58,745 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:32:58,745 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:32:58,745 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:32:58,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:32:58,746 INFO L82 PathProgramCache]: Analyzing trace with hash 2087004206, now seen corresponding path program 34 times [2018-10-14 16:32:58,746 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:32:58,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:33:02,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:33:02,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:33:02,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2018-10-14 16:33:02,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-14 16:33:02,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-14 16:33:02,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1271, Invalid=6039, Unknown=0, NotChecked=0, Total=7310 [2018-10-14 16:33:02,758 INFO L87 Difference]: Start difference. First operand 460 states and 460 transitions. Second operand 86 states. [2018-10-14 16:33:04,987 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2018-10-14 16:33:06,157 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:33:07,314 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:33:07,462 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:33:07,919 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:33:08,547 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:33:09,351 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:33:09,921 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:33:10,120 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:33:10,618 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:33:10,798 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:33:11,323 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:33:11,508 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:33:12,035 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:33:12,232 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:33:12,777 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:33:12,978 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-14 16:33:13,527 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-14 16:33:14,309 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56