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/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_k.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-4eac566 [2018-09-23 19:39:02,984 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 19:39:02,986 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 19:39:02,998 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 19:39:02,998 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 19:39:02,999 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 19:39:03,000 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 19:39:03,002 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 19:39:03,004 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 19:39:03,005 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 19:39:03,006 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-23 19:39:03,030 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 19:39:03,045 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 19:39:03,046 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 19:39:03,046 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 19:39:03,047 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 19:39:03,047 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 19:39:03,048 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 19:39:03,048 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 19:39:03,048 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 19:39:03,048 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 19:39:03,049 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 19:39:03,049 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 19:39:03,049 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 19:39:03,049 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 19:39:03,050 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 19:39:03,050 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 19:39:03,050 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 19:39:03,050 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 19:39:03,050 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 19:39:03,051 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 19:39:03,053 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 19:39:03,054 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 19:39:03,054 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 19:39:03,054 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:39:03,054 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 19:39:03,055 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 19:39:03,055 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 19:39:03,055 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 19:39:03,055 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 19:39:03,057 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 19:39:03,058 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 19:39:03,107 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 19:39:03,120 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 19:39:03,127 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 19:39:03,129 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 19:39:03,130 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 19:39:03,130 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_k.i_3.bpl [2018-09-23 19:39:03,131 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_k.i_3.bpl' [2018-09-23 19:39:03,179 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 19:39:03,182 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 19:39:03,182 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 19:39:03,183 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 19:39:03,183 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 19:39:03,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:39:03" (1/1) ... [2018-09-23 19:39:03,215 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:39:03" (1/1) ... [2018-09-23 19:39:03,222 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 19:39:03,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 19:39:03,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 19:39:03,224 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 19:39:03,235 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:39:03" (1/1) ... [2018-09-23 19:39:03,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:39:03" (1/1) ... [2018-09-23 19:39:03,236 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:39:03" (1/1) ... [2018-09-23 19:39:03,237 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:39:03" (1/1) ... [2018-09-23 19:39:03,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:39:03" (1/1) ... [2018-09-23 19:39:03,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:39:03" (1/1) ... [2018-09-23 19:39:03,242 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:39:03" (1/1) ... [2018-09-23 19:39:03,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 19:39:03,244 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 19:39:03,244 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 19:39:03,244 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 19:39:03,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:39:03" (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:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:39:03,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-23 19:39:03,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-23 19:39:03,574 INFO L354 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-23 19:39:03,575 INFO L202 PluginConnector]: Adding new model count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:39:03 BoogieIcfgContainer [2018-09-23 19:39:03,575 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 19:39:03,576 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 19:39:03,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 19:39:03,582 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 19:39:03,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:39:03" (1/2) ... [2018-09-23 19:39:03,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59f17800 and model type count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 07:39:03, skipping insertion in model container [2018-09-23 19:39:03,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:39:03" (2/2) ... [2018-09-23 19:39:03,586 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_k.i_3.bpl [2018-09-23 19:39:03,596 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 19:39:03,608 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 19:39:03,662 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 19:39:03,663 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 19:39:03,663 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 19:39:03,664 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 19:39:03,664 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 19:39:03,664 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 19:39:03,664 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 19:39:03,664 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 19:39:03,664 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 19:39:03,680 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-23 19:39:03,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-23 19:39:03,686 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:03,687 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-23 19:39:03,688 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:03,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:03,695 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-23 19:39:03,697 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:03,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:03,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:03,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:03,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:03,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:03,879 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:39:03,879 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-23 19:39:03,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 19:39:03,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 19:39:03,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:39:03,898 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-23 19:39:03,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:03,947 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-23 19:39:03,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 19:39:03,949 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-23 19:39:03,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:03,960 INFO L225 Difference]: With dead ends: 11 [2018-09-23 19:39:03,960 INFO L226 Difference]: Without dead ends: 7 [2018-09-23 19:39:03,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:39:03,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-23 19:39:04,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-23 19:39:04,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-23 19:39:04,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-23 19:39:04,005 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-23 19:39:04,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:04,005 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-23 19:39:04,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 19:39:04,006 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-23 19:39:04,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-23 19:39:04,006 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:04,006 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-23 19:39:04,007 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:04,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:04,007 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-23 19:39:04,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:04,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:04,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:04,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:04,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:04,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:04,157 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:04,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:04,171 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:04,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:04,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:04,276 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:04,276 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2018-09-23 19:39:04,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 19:39:04,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 19:39:04,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:39:04,278 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 5 states. [2018-09-23 19:39:04,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:04,332 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-09-23 19:39:04,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 19:39:04,332 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2018-09-23 19:39:04,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:04,333 INFO L225 Difference]: With dead ends: 13 [2018-09-23 19:39:04,333 INFO L226 Difference]: Without dead ends: 11 [2018-09-23 19:39:04,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:39:04,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-23 19:39:04,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-23 19:39:04,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-23 19:39:04,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-23 19:39:04,339 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 6 [2018-09-23 19:39:04,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:04,339 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-23 19:39:04,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 19:39:04,339 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-23 19:39:04,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 19:39:04,340 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:04,340 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-23 19:39:04,341 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:04,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:04,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 2 times [2018-09-23 19:39:04,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:04,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:04,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:04,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:04,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:04,480 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:04,480 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:04,489 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:39:04,514 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:39:04,514 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:04,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:04,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:04,633 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:04,633 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-09-23 19:39:04,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:39:04,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:39:04,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:39:04,634 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-09-23 19:39:05,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:05,057 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-09-23 19:39:05,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:39:05,058 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-09-23 19:39:05,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:05,058 INFO L225 Difference]: With dead ends: 17 [2018-09-23 19:39:05,059 INFO L226 Difference]: Without dead ends: 15 [2018-09-23 19:39:05,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:39:05,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-23 19:39:05,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-23 19:39:05,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-23 19:39:05,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-23 19:39:05,064 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 10 [2018-09-23 19:39:05,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:05,065 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-23 19:39:05,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:39:05,065 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-23 19:39:05,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 19:39:05,066 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:05,066 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-23 19:39:05,066 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:05,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:05,067 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 3 times [2018-09-23 19:39:05,067 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:05,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:05,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:05,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:05,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:05,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:05,244 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:05,245 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:05,245 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:05,260 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:39:05,279 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-23 19:39:05,280 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:05,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:05,442 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:05,442 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-09-23 19:39:05,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:39:05,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:39:05,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:39:05,444 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 9 states. [2018-09-23 19:39:05,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:05,681 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-09-23 19:39:05,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:39:05,682 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2018-09-23 19:39:05,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:05,683 INFO L225 Difference]: With dead ends: 21 [2018-09-23 19:39:05,683 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 19:39:05,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:39:05,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 19:39:05,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-23 19:39:05,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 19:39:05,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-23 19:39:05,691 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 14 [2018-09-23 19:39:05,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:05,691 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-23 19:39:05,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:39:05,692 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-23 19:39:05,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:39:05,692 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:05,693 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-23 19:39:05,693 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:05,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:05,693 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 4 times [2018-09-23 19:39:05,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:05,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:05,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:05,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:05,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:06,294 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:06,294 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:06,306 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:39:06,319 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:39:06,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:06,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:06,408 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:06,430 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:06,430 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-09-23 19:39:06,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:39:06,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:39:06,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:39:06,432 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 11 states. [2018-09-23 19:39:06,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:06,694 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-09-23 19:39:06,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:39:06,695 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2018-09-23 19:39:06,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:06,696 INFO L225 Difference]: With dead ends: 25 [2018-09-23 19:39:06,697 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 19:39:06,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:39:06,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 19:39:06,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-23 19:39:06,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-23 19:39:06,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-23 19:39:06,704 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 18 [2018-09-23 19:39:06,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:06,705 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-23 19:39:06,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:39:06,705 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-23 19:39:06,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 19:39:06,706 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:06,706 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-23 19:39:06,706 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:06,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:06,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 5 times [2018-09-23 19:39:06,707 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:06,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:06,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:06,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:06,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:07,136 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:07,136 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:07,154 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:39:07,178 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-23 19:39:07,178 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:07,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:07,246 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:07,272 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:07,272 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-09-23 19:39:07,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:39:07,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:39:07,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:39:07,274 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 13 states. [2018-09-23 19:39:07,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:07,746 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-09-23 19:39:07,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:39:07,747 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2018-09-23 19:39:07,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:07,748 INFO L225 Difference]: With dead ends: 29 [2018-09-23 19:39:07,749 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 19:39:07,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:39:07,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 19:39:07,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-23 19:39:07,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-23 19:39:07,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-23 19:39:07,757 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 22 [2018-09-23 19:39:07,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:07,758 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-23 19:39:07,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:39:07,758 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-23 19:39:07,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 19:39:07,759 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:07,759 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-09-23 19:39:07,760 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:07,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:07,760 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 6 times [2018-09-23 19:39:07,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:07,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:07,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:07,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:07,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:08,007 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:08,008 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:08,008 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:08,021 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:39:08,035 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-09-23 19:39:08,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:08,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:08,088 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:08,109 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:08,110 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-09-23 19:39:08,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:39:08,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:39:08,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:39:08,111 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 15 states. [2018-09-23 19:39:08,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:08,703 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-09-23 19:39:08,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 19:39:08,704 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2018-09-23 19:39:08,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:08,705 INFO L225 Difference]: With dead ends: 33 [2018-09-23 19:39:08,706 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 19:39:08,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:39:08,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 19:39:08,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-23 19:39:08,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 19:39:08,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-23 19:39:08,715 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 26 [2018-09-23 19:39:08,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:08,716 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-23 19:39:08,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:39:08,716 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-23 19:39:08,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-23 19:39:08,717 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:08,717 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-09-23 19:39:08,717 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:08,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:08,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 7 times [2018-09-23 19:39:08,718 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:08,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:08,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:08,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:08,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:08,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:09,283 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:09,284 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:09,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:09,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:09,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:09,403 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:09,403 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-09-23 19:39:09,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:39:09,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:39:09,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:39:09,406 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 17 states. [2018-09-23 19:39:10,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:10,163 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-09-23 19:39:10,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:39:10,164 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2018-09-23 19:39:10,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:10,165 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:39:10,166 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:39:10,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:39:10,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:39:10,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-23 19:39:10,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-23 19:39:10,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-23 19:39:10,175 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 30 [2018-09-23 19:39:10,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:10,175 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-23 19:39:10,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:39:10,176 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-23 19:39:10,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 19:39:10,177 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:10,177 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-09-23 19:39:10,177 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:10,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:10,177 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 8 times [2018-09-23 19:39:10,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:10,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:10,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:10,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:10,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:10,564 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:10,564 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:10,564 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:10,579 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:39:10,611 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:39:10,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:10,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:10,744 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:10,745 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-09-23 19:39:10,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 19:39:10,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 19:39:10,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:39:10,747 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 19 states. [2018-09-23 19:39:11,030 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 9 [2018-09-23 19:39:11,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:11,592 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-09-23 19:39:11,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 19:39:11,594 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 34 [2018-09-23 19:39:11,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:11,594 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:39:11,594 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:39:11,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:39:11,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:39:11,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-23 19:39:11,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 19:39:11,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-23 19:39:11,602 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 34 [2018-09-23 19:39:11,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:11,603 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-23 19:39:11,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 19:39:11,603 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-23 19:39:11,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 19:39:11,604 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:11,604 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-09-23 19:39:11,604 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:11,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:11,605 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 9 times [2018-09-23 19:39:11,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:11,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:11,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:11,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:11,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:12,045 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:12,045 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:12,064 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:39:12,104 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-23 19:39:12,104 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:12,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:12,270 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:12,271 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-09-23 19:39:12,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 19:39:12,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 19:39:12,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:39:12,272 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 21 states. [2018-09-23 19:39:12,688 WARN L178 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 11 [2018-09-23 19:39:13,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:13,412 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-09-23 19:39:13,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 19:39:13,415 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 38 [2018-09-23 19:39:13,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:13,416 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:39:13,416 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:39:13,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:39:13,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:39:13,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-23 19:39:13,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 19:39:13,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-23 19:39:13,427 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 38 [2018-09-23 19:39:13,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:13,427 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-23 19:39:13,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 19:39:13,428 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-23 19:39:13,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 19:39:13,429 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:13,429 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-09-23 19:39:13,429 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:13,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:13,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 10 times [2018-09-23 19:39:13,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:13,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:13,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:13,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:13,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:13,806 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:13,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:13,814 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:39:13,829 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:39:13,829 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:13,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:13,907 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:13,907 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-09-23 19:39:13,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 19:39:13,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 19:39:13,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:39:13,909 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 23 states. [2018-09-23 19:39:14,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:14,944 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-09-23 19:39:14,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:39:14,945 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 42 [2018-09-23 19:39:14,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:14,946 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:39:14,946 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:39:14,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:39:14,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:39:14,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-23 19:39:14,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 19:39:14,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-23 19:39:14,957 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 42 [2018-09-23 19:39:14,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:14,958 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-23 19:39:14,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 19:39:14,958 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-23 19:39:14,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-23 19:39:14,959 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:14,959 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-09-23 19:39:14,959 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:14,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:14,960 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 11 times [2018-09-23 19:39:14,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:14,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:14,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:14,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:14,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:14,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:15,359 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:15,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:15,377 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:39:15,416 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-23 19:39:15,416 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:15,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:15,488 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:15,508 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:15,509 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-09-23 19:39:15,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 19:39:15,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 19:39:15,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:39:15,510 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 25 states. [2018-09-23 19:39:16,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:16,632 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-09-23 19:39:16,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 19:39:16,633 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 46 [2018-09-23 19:39:16,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:16,634 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:39:16,634 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:39:16,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:39:16,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:39:16,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-23 19:39:16,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-23 19:39:16,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-23 19:39:16,642 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 46 [2018-09-23 19:39:16,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:16,643 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-23 19:39:16,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 19:39:16,643 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-23 19:39:16,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 19:39:16,644 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:16,644 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-09-23 19:39:16,644 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:16,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:16,645 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 12 times [2018-09-23 19:39:16,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:16,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:16,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:16,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:16,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:17,100 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:17,101 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:17,101 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:17,109 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:39:17,133 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-09-23 19:39:17,133 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:17,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:17,213 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:17,213 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-09-23 19:39:17,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 19:39:17,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 19:39:17,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:39:17,214 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 27 states. [2018-09-23 19:39:18,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:18,700 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-09-23 19:39:18,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:39:18,700 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 50 [2018-09-23 19:39:18,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:18,701 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:39:18,702 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:39:18,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:39:18,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:39:18,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-23 19:39:18,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-23 19:39:18,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-23 19:39:18,712 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 50 [2018-09-23 19:39:18,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:18,712 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-23 19:39:18,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 19:39:18,713 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-23 19:39:18,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-23 19:39:18,713 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:18,713 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-09-23 19:39:18,714 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:18,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:18,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 13 times [2018-09-23 19:39:18,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:18,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:18,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:18,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:18,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:19,398 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:19,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:19,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:19,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:19,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:19,604 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:19,625 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:19,625 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-09-23 19:39:19,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 19:39:19,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 19:39:19,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:39:19,628 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 29 states. [2018-09-23 19:39:19,934 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 11 [2018-09-23 19:39:21,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:21,185 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-09-23 19:39:21,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:39:21,185 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 54 [2018-09-23 19:39:21,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:21,186 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:39:21,186 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:39:21,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:39:21,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:39:21,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-23 19:39:21,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 19:39:21,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-23 19:39:21,196 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 54 [2018-09-23 19:39:21,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:21,197 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-23 19:39:21,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 19:39:21,197 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-23 19:39:21,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 19:39:21,198 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:21,198 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-09-23 19:39:21,198 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:21,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:21,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 14 times [2018-09-23 19:39:21,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:21,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:21,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:21,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:21,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:21,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:21,876 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:21,877 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:21,877 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:21,885 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:39:21,933 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:39:21,934 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:21,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:22,217 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:22,217 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-09-23 19:39:22,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 19:39:22,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 19:39:22,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:39:22,218 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 31 states. [2018-09-23 19:39:23,208 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 11 [2018-09-23 19:39:24,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:24,297 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-09-23 19:39:24,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 19:39:24,298 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 58 [2018-09-23 19:39:24,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:24,299 INFO L225 Difference]: With dead ends: 65 [2018-09-23 19:39:24,299 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 19:39:24,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:39:24,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 19:39:24,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-23 19:39:24,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-23 19:39:24,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-23 19:39:24,309 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 58 [2018-09-23 19:39:24,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:24,309 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-23 19:39:24,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 19:39:24,310 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-23 19:39:24,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 19:39:24,311 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:24,311 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-09-23 19:39:24,311 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:24,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:24,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 15 times [2018-09-23 19:39:24,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:24,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:24,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:24,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:24,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:24,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:25,168 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:25,168 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:25,169 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:25,177 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:39:25,207 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-23 19:39:25,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:25,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:25,309 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:25,309 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-09-23 19:39:25,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 19:39:25,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 19:39:25,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:39:25,310 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 33 states. [2018-09-23 19:39:27,551 WARN L178 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 11 [2018-09-23 19:39:28,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:28,050 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-09-23 19:39:28,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 19:39:28,050 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 62 [2018-09-23 19:39:28,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:28,051 INFO L225 Difference]: With dead ends: 69 [2018-09-23 19:39:28,052 INFO L226 Difference]: Without dead ends: 67 [2018-09-23 19:39:28,054 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:39:28,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-23 19:39:28,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-23 19:39:28,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-23 19:39:28,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-23 19:39:28,061 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 62 [2018-09-23 19:39:28,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:28,062 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-23 19:39:28,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 19:39:28,062 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-23 19:39:28,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-23 19:39:28,063 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:28,063 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-09-23 19:39:28,063 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:28,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:28,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 16 times [2018-09-23 19:39:28,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:28,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:28,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:28,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:28,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:28,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:29,423 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:29,424 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:29,424 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:29,431 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:39:29,516 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:39:29,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:29,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:29,644 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:29,665 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:29,666 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-09-23 19:39:29,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 19:39:29,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 19:39:29,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=1122, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:39:29,667 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 35 states. [2018-09-23 19:39:31,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:31,978 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-09-23 19:39:31,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 19:39:31,979 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 66 [2018-09-23 19:39:31,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:31,980 INFO L225 Difference]: With dead ends: 73 [2018-09-23 19:39:31,980 INFO L226 Difference]: Without dead ends: 71 [2018-09-23 19:39:31,982 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:39:31,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-23 19:39:31,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-23 19:39:31,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-23 19:39:31,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-23 19:39:31,990 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 66 [2018-09-23 19:39:31,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:31,990 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-23 19:39:31,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 19:39:31,991 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-23 19:39:31,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-23 19:39:31,992 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:31,992 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-09-23 19:39:31,992 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:31,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:31,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 17 times [2018-09-23 19:39:31,992 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:31,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:31,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:31,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:31,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:32,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:32,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:32,794 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:32,794 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:32,802 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:39:32,874 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-23 19:39:32,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:32,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:32,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:32,977 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:32,978 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-09-23 19:39:32,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 19:39:32,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 19:39:32,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:39:32,979 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 37 states. [2018-09-23 19:39:35,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:35,368 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-09-23 19:39:35,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 19:39:35,369 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 70 [2018-09-23 19:39:35,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:35,370 INFO L225 Difference]: With dead ends: 77 [2018-09-23 19:39:35,370 INFO L226 Difference]: Without dead ends: 75 [2018-09-23 19:39:35,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1259, Invalid=3571, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:39:35,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-23 19:39:35,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-23 19:39:35,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-23 19:39:35,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-23 19:39:35,378 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 70 [2018-09-23 19:39:35,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:35,378 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-23 19:39:35,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 19:39:35,379 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-23 19:39:35,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-23 19:39:35,379 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:35,379 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-09-23 19:39:35,380 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:35,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:35,380 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 18 times [2018-09-23 19:39:35,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:35,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:35,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:35,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:35,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:36,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:36,209 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:36,209 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:36,216 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:39:36,250 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2018-09-23 19:39:36,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:36,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:36,361 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:36,361 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-09-23 19:39:36,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 19:39:36,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 19:39:36,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:39:36,363 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 39 states. [2018-09-23 19:39:39,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:39,133 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-09-23 19:39:39,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 19:39:39,134 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 74 [2018-09-23 19:39:39,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:39,135 INFO L225 Difference]: With dead ends: 81 [2018-09-23 19:39:39,135 INFO L226 Difference]: Without dead ends: 79 [2018-09-23 19:39:39,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:39:39,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-23 19:39:39,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-23 19:39:39,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-23 19:39:39,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-23 19:39:39,146 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 74 [2018-09-23 19:39:39,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:39,146 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-23 19:39:39,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 19:39:39,146 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-23 19:39:39,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-23 19:39:39,147 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:39,148 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-09-23 19:39:39,148 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:39,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:39,148 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 19 times [2018-09-23 19:39:39,148 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:39,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:39,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:39,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:39,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:39,977 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:39,977 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:39,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:40,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:40,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:40,212 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:40,212 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-09-23 19:39:40,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 19:39:40,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 19:39:40,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1560, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:39:40,214 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 41 states. [2018-09-23 19:39:43,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:43,395 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-09-23 19:39:43,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 19:39:43,396 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 78 [2018-09-23 19:39:43,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:43,396 INFO L225 Difference]: With dead ends: 85 [2018-09-23 19:39:43,396 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 19:39:43,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1559, Invalid=4447, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:39:43,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 19:39:43,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-23 19:39:43,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-23 19:39:43,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-23 19:39:43,403 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 78 [2018-09-23 19:39:43,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:43,403 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-23 19:39:43,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 19:39:43,404 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-23 19:39:43,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-23 19:39:43,404 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:43,404 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-09-23 19:39:43,405 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:43,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:43,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 20 times [2018-09-23 19:39:43,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:43,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:43,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:43,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:43,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:43,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:44,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:44,567 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:44,567 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:44,577 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:39:44,682 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:39:44,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:44,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:44,839 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:44,839 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-09-23 19:39:44,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 19:39:44,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 19:39:44,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1722, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:39:44,840 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 43 states. [2018-09-23 19:39:48,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:48,440 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-09-23 19:39:48,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 19:39:48,441 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 82 [2018-09-23 19:39:48,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:48,442 INFO L225 Difference]: With dead ends: 89 [2018-09-23 19:39:48,442 INFO L226 Difference]: Without dead ends: 87 [2018-09-23 19:39:48,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1721, Invalid=4921, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 19:39:48,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-23 19:39:48,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-23 19:39:48,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-23 19:39:48,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-23 19:39:48,450 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 82 [2018-09-23 19:39:48,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:48,451 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-23 19:39:48,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 19:39:48,451 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-23 19:39:48,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-23 19:39:48,452 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:48,452 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-09-23 19:39:48,452 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:48,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:48,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 21 times [2018-09-23 19:39:48,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:48,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:48,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:48,454 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:48,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:48,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:49,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:49,560 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:49,560 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:49,568 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:39:49,666 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-23 19:39:49,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:49,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:49,780 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:49,780 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-09-23 19:39:49,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 19:39:49,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 19:39:49,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:39:49,782 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 45 states. [2018-09-23 19:39:53,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:53,902 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-09-23 19:39:53,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 19:39:53,906 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 86 [2018-09-23 19:39:53,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:53,907 INFO L225 Difference]: With dead ends: 93 [2018-09-23 19:39:53,907 INFO L226 Difference]: Without dead ends: 91 [2018-09-23 19:39:53,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1891, Invalid=5419, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 19:39:53,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-23 19:39:53,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-23 19:39:53,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-23 19:39:53,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-23 19:39:53,913 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 86 [2018-09-23 19:39:53,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:53,913 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-23 19:39:53,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 19:39:53,914 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-23 19:39:53,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-23 19:39:53,914 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:53,914 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-09-23 19:39:53,914 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:53,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:53,915 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 22 times [2018-09-23 19:39:53,915 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:53,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:53,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:53,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:53,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:54,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:55,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:55,010 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:55,010 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:55,018 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:39:55,054 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:39:55,055 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:55,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:55,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:55,194 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:55,194 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2018-09-23 19:39:55,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 19:39:55,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 19:39:55,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=2070, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:39:55,195 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 47 states. [2018-09-23 19:39:59,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:59,737 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-09-23 19:39:59,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 19:39:59,738 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 90 [2018-09-23 19:39:59,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:59,740 INFO L225 Difference]: With dead ends: 97 [2018-09-23 19:39:59,740 INFO L226 Difference]: Without dead ends: 95 [2018-09-23 19:39:59,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 19:39:59,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-23 19:39:59,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-23 19:39:59,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-23 19:39:59,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-23 19:39:59,750 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 90 [2018-09-23 19:39:59,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:59,751 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-23 19:39:59,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 19:39:59,751 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-23 19:39:59,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-23 19:39:59,752 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:59,752 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-09-23 19:39:59,752 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:59,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:59,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 23 times [2018-09-23 19:39:59,753 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:59,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:59,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:59,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:59,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:00,990 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:00,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:01,002 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:40:01,156 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-23 19:40:01,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:01,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:01,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:01,607 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:01,607 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2018-09-23 19:40:01,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 19:40:01,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 19:40:01,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=2256, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:40:01,608 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 49 states. [2018-09-23 19:40:02,273 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 11 [2018-09-23 19:40:06,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:06,437 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-09-23 19:40:06,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 19:40:06,438 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 94 [2018-09-23 19:40:06,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:06,439 INFO L225 Difference]: With dead ends: 101 [2018-09-23 19:40:06,439 INFO L226 Difference]: Without dead ends: 99 [2018-09-23 19:40:06,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=2255, Invalid=6487, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 19:40:06,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-23 19:40:06,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-23 19:40:06,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-23 19:40:06,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-23 19:40:06,447 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 94 [2018-09-23 19:40:06,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:06,448 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-23 19:40:06,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 19:40:06,448 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-23 19:40:06,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 19:40:06,448 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:06,448 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-09-23 19:40:06,449 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:06,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:06,449 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 24 times [2018-09-23 19:40:06,449 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:06,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:06,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:06,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:06,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:06,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:08,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:08,016 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:08,016 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:08,023 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:40:08,073 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2018-09-23 19:40:08,073 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:08,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:08,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:08,191 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:08,191 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2018-09-23 19:40:08,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 19:40:08,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 19:40:08,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=2450, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:40:08,192 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 51 states. [2018-09-23 19:40:08,424 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 9 [2018-09-23 19:40:13,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:13,607 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-09-23 19:40:13,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 19:40:13,607 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 98 [2018-09-23 19:40:13,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:13,608 INFO L225 Difference]: With dead ends: 105 [2018-09-23 19:40:13,609 INFO L226 Difference]: Without dead ends: 103 [2018-09-23 19:40:13,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=2449, Invalid=7057, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 19:40:13,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-23 19:40:13,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-23 19:40:13,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-23 19:40:13,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-23 19:40:13,619 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 98 [2018-09-23 19:40:13,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:13,619 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-23 19:40:13,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 19:40:13,619 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-23 19:40:13,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-23 19:40:13,620 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:13,620 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-09-23 19:40:13,620 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:13,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:13,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 25 times [2018-09-23 19:40:13,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:13,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:13,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:13,621 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:13,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:15,010 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:15,010 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:15,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:40:15,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:15,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:15,423 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:15,423 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2018-09-23 19:40:15,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 19:40:15,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 19:40:15,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=2652, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:40:15,424 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 53 states. [2018-09-23 19:40:15,549 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 8 [2018-09-23 19:40:15,663 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 9 [2018-09-23 19:40:15,785 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-23 19:40:16,555 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2018-09-23 19:40:21,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:21,272 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-09-23 19:40:21,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 19:40:21,272 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 102 [2018-09-23 19:40:21,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:21,273 INFO L225 Difference]: With dead ends: 109 [2018-09-23 19:40:21,274 INFO L226 Difference]: Without dead ends: 107 [2018-09-23 19:40:21,275 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=2651, Invalid=7651, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 19:40:21,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-23 19:40:21,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-23 19:40:21,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-23 19:40:21,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-23 19:40:21,283 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 102 [2018-09-23 19:40:21,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:21,283 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-23 19:40:21,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 19:40:21,283 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-23 19:40:21,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-23 19:40:21,284 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:21,284 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-09-23 19:40:21,284 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:21,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:21,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 26 times [2018-09-23 19:40:21,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:21,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:21,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:21,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:40:21,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:21,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:22,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:22,966 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:22,966 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:22,973 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:40:23,180 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:40:23,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:23,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:23,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:23,417 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:23,417 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2018-09-23 19:40:23,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 19:40:23,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 19:40:23,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:40:23,418 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 55 states. [2018-09-23 19:40:23,667 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2018-09-23 19:40:23,794 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-23 19:40:23,925 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-23 19:40:24,056 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-23 19:40:24,322 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-23 19:40:29,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:29,854 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-09-23 19:40:29,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 19:40:29,855 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 106 [2018-09-23 19:40:29,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:29,856 INFO L225 Difference]: With dead ends: 113 [2018-09-23 19:40:29,856 INFO L226 Difference]: Without dead ends: 111 [2018-09-23 19:40:29,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=2861, Invalid=8269, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 19:40:29,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-23 19:40:29,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-23 19:40:29,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-23 19:40:29,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-23 19:40:29,865 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 106 [2018-09-23 19:40:29,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:29,865 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-23 19:40:29,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 19:40:29,866 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-23 19:40:29,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-23 19:40:29,866 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:29,866 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-09-23 19:40:29,867 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:29,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:29,867 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 27 times [2018-09-23 19:40:29,867 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:29,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:29,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:29,868 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:29,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:30,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:31,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:31,443 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:31,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:31,453 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:40:31,534 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-23 19:40:31,534 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:31,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:31,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:31,676 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:31,676 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2018-09-23 19:40:31,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 19:40:31,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 19:40:31,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=3080, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:40:31,677 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 57 states. [2018-09-23 19:40:31,814 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 8 [2018-09-23 19:40:31,963 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2018-09-23 19:40:32,100 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-23 19:40:32,232 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-23 19:40:32,371 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-23 19:40:32,509 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-23 19:40:32,651 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-23 19:40:32,942 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-23 19:40:33,113 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-23 19:40:38,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:38,830 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-09-23 19:40:38,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 19:40:38,831 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 110 [2018-09-23 19:40:38,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:38,832 INFO L225 Difference]: With dead ends: 117 [2018-09-23 19:40:38,832 INFO L226 Difference]: Without dead ends: 115 [2018-09-23 19:40:38,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=3079, Invalid=8911, Unknown=0, NotChecked=0, Total=11990 [2018-09-23 19:40:38,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-23 19:40:38,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-23 19:40:38,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-23 19:40:38,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-23 19:40:38,841 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 110 [2018-09-23 19:40:38,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:38,841 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-23 19:40:38,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 19:40:38,841 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-23 19:40:38,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-23 19:40:38,842 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:38,842 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-09-23 19:40:38,842 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:38,842 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:38,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 28 times [2018-09-23 19:40:38,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:38,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:38,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:38,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:38,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:40,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:40,541 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:40,541 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:40,550 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:40:40,804 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:40:40,804 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:40,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:41,079 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:41,079 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2018-09-23 19:40:41,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 19:40:41,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 19:40:41,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=3306, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:40:41,080 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 59 states. [2018-09-23 19:40:41,228 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 8 [2018-09-23 19:40:41,376 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 9 [2018-09-23 19:40:41,513 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-23 19:40:41,650 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-23 19:40:41,791 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-23 19:40:41,927 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-23 19:40:42,078 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-23 19:40:42,229 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-23 19:40:42,378 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-23 19:40:42,538 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-23 19:40:43,019 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-09-23 19:40:43,363 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2018-09-23 19:40:49,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:49,051 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-09-23 19:40:49,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 19:40:49,053 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 114 [2018-09-23 19:40:49,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:49,054 INFO L225 Difference]: With dead ends: 121 [2018-09-23 19:40:49,054 INFO L226 Difference]: Without dead ends: 119 [2018-09-23 19:40:49,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=3305, Invalid=9577, Unknown=0, NotChecked=0, Total=12882 [2018-09-23 19:40:49,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-23 19:40:49,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-23 19:40:49,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-23 19:40:49,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-23 19:40:49,063 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 114 [2018-09-23 19:40:49,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:49,064 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-23 19:40:49,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 19:40:49,064 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-23 19:40:49,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-23 19:40:49,065 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:49,065 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-09-23 19:40:49,065 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:49,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:49,065 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 29 times [2018-09-23 19:40:49,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:49,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:49,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:49,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:49,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:49,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:50,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:50,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:50,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:50,853 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:40:51,104 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2018-09-23 19:40:51,104 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:51,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:51,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:51,265 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:51,265 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2018-09-23 19:40:51,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-23 19:40:51,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-23 19:40:51,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=3540, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:40:51,266 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 61 states. [2018-09-23 19:40:51,427 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 8 [2018-09-23 19:40:51,578 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 9 [2018-09-23 19:40:51,733 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-23 19:40:51,882 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-23 19:40:52,037 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-23 19:40:52,180 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-23 19:40:52,332 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-23 19:40:52,493 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-23 19:40:52,656 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-23 19:40:52,814 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-23 19:40:52,975 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-23 19:40:53,304 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-23 19:40:53,670 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-09-23 19:40:59,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:59,968 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2018-09-23 19:40:59,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 19:40:59,969 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 118 [2018-09-23 19:40:59,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:59,970 INFO L225 Difference]: With dead ends: 125 [2018-09-23 19:40:59,971 INFO L226 Difference]: Without dead ends: 123 [2018-09-23 19:40:59,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=3539, Invalid=10267, Unknown=0, NotChecked=0, Total=13806 [2018-09-23 19:40:59,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-23 19:40:59,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-23 19:40:59,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-23 19:40:59,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-23 19:40:59,981 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 118 [2018-09-23 19:40:59,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:59,982 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-23 19:40:59,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-23 19:40:59,982 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-23 19:40:59,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-23 19:40:59,982 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:59,983 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-09-23 19:40:59,983 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:59,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:59,983 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 30 times [2018-09-23 19:40:59,983 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:59,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:59,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:59,984 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:59,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:00,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:02,237 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:02,237 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:02,245 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:41:02,312 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 60 check-sat command(s) [2018-09-23 19:41:02,313 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:02,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:02,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:02,474 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:02,474 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2018-09-23 19:41:02,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-23 19:41:02,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-23 19:41:02,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=3782, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:41:02,475 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 63 states. [2018-09-23 19:41:02,639 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 8 [2018-09-23 19:41:02,787 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 9 [2018-09-23 19:41:02,946 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-23 19:41:03,105 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-23 19:41:03,271 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-23 19:41:03,432 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-23 19:41:03,589 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-23 19:41:03,772 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-23 19:41:03,951 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-23 19:41:04,151 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-23 19:41:04,317 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-23 19:41:04,491 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-23 19:41:04,661 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-23 19:41:04,829 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-23 19:41:05,004 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-23 19:41:05,547 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-09-23 19:41:11,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:11,558 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2018-09-23 19:41:11,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 19:41:11,559 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 122 [2018-09-23 19:41:11,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:11,560 INFO L225 Difference]: With dead ends: 129 [2018-09-23 19:41:11,560 INFO L226 Difference]: Without dead ends: 127 [2018-09-23 19:41:11,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=3781, Invalid=10981, Unknown=0, NotChecked=0, Total=14762 [2018-09-23 19:41:11,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-23 19:41:11,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-23 19:41:11,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-23 19:41:11,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-23 19:41:11,568 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 122 [2018-09-23 19:41:11,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:11,568 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-23 19:41:11,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-23 19:41:11,569 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-23 19:41:11,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-23 19:41:11,569 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:11,569 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-09-23 19:41:11,570 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:11,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:11,570 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 31 times [2018-09-23 19:41:11,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:11,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:11,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:11,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:11,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:11,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:13,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:13,643 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:13,643 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:13,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:41:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:14,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:14,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:14,361 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:14,361 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2018-09-23 19:41:14,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 19:41:14,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 19:41:14,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=4032, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:41:14,362 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 65 states. [2018-09-23 19:41:14,530 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 8 [2018-09-23 19:41:14,684 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 9 [2018-09-23 19:41:14,844 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-23 19:41:15,009 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-23 19:41:15,192 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-23 19:41:15,358 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-23 19:41:15,529 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-23 19:41:15,711 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-23 19:41:15,889 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-23 19:41:16,064 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-23 19:41:16,238 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-23 19:41:16,414 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-23 19:41:16,580 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-23 19:41:16,750 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-23 19:41:16,934 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-23 19:41:17,119 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-23 19:41:24,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:24,368 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-09-23 19:41:24,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 19:41:24,369 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 126 [2018-09-23 19:41:24,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:24,370 INFO L225 Difference]: With dead ends: 133 [2018-09-23 19:41:24,370 INFO L226 Difference]: Without dead ends: 131 [2018-09-23 19:41:24,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=4031, Invalid=11719, Unknown=0, NotChecked=0, Total=15750 [2018-09-23 19:41:24,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-23 19:41:24,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-23 19:41:24,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-23 19:41:24,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-23 19:41:24,380 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 126 [2018-09-23 19:41:24,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:24,380 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-23 19:41:24,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 19:41:24,380 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-23 19:41:24,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-23 19:41:24,381 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:24,381 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-09-23 19:41:24,382 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:24,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:24,382 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 32 times [2018-09-23 19:41:24,382 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:24,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:24,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:24,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:41:24,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:26,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:26,656 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:26,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:26,665 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:41:27,038 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:41:27,038 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:27,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:27,616 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:27,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2018-09-23 19:41:27,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-23 19:41:27,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-23 19:41:27,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=4290, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:41:27,618 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 67 states. [2018-09-23 19:41:27,923 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 8 [2018-09-23 19:41:28,080 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 9 [2018-09-23 19:41:28,243 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-23 19:41:28,416 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-23 19:41:28,594 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-23 19:41:28,769 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-23 19:41:28,949 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-23 19:41:29,124 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-23 19:41:29,337 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-23 19:41:29,532 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-23 19:41:29,720 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-23 19:41:29,910 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-23 19:41:30,095 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-23 19:41:30,272 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-23 19:41:30,469 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-23 19:41:30,660 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-23 19:41:31,242 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-23 19:41:31,440 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-23 19:41:38,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:38,286 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2018-09-23 19:41:38,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 19:41:38,286 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 130 [2018-09-23 19:41:38,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:38,288 INFO L225 Difference]: With dead ends: 137 [2018-09-23 19:41:38,288 INFO L226 Difference]: Without dead ends: 135 [2018-09-23 19:41:38,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=4289, Invalid=12481, Unknown=0, NotChecked=0, Total=16770 [2018-09-23 19:41:38,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-23 19:41:38,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-23 19:41:38,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-23 19:41:38,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-23 19:41:38,297 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 130 [2018-09-23 19:41:38,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:38,297 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-23 19:41:38,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-23 19:41:38,297 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-23 19:41:38,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-23 19:41:38,298 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:38,298 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-09-23 19:41:38,298 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:38,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:38,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 33 times [2018-09-23 19:41:38,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:38,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:38,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:38,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:38,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:38,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:41,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:41,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:41,065 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:41,073 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:41:41,144 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2018-09-23 19:41:41,145 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:41,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:41,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:41,339 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:41,339 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2018-09-23 19:41:41,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-23 19:41:41,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-23 19:41:41,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=4556, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 19:41:41,340 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 69 states. [2018-09-23 19:41:41,579 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 8 [2018-09-23 19:41:41,748 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 9 [2018-09-23 19:41:41,928 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-23 19:41:42,110 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-23 19:41:42,294 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-23 19:41:42,473 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-23 19:41:42,655 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-23 19:41:42,845 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-23 19:41:43,040 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-23 19:41:43,231 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-23 19:41:43,429 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-23 19:41:43,625 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-23 19:41:43,816 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-23 19:41:44,005 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-23 19:41:44,212 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-23 19:41:44,426 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-23 19:41:44,637 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-23 19:41:44,876 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-23 19:41:45,294 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-23 19:41:52,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:52,737 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2018-09-23 19:41:52,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 19:41:52,738 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 134 [2018-09-23 19:41:52,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:52,739 INFO L225 Difference]: With dead ends: 141 [2018-09-23 19:41:52,739 INFO L226 Difference]: Without dead ends: 139 [2018-09-23 19:41:52,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=4555, Invalid=13267, Unknown=0, NotChecked=0, Total=17822 [2018-09-23 19:41:52,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-23 19:41:52,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-23 19:41:52,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-23 19:41:52,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-23 19:41:52,747 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 134 [2018-09-23 19:41:52,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:52,747 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-23 19:41:52,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-23 19:41:52,748 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-23 19:41:52,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-23 19:41:52,748 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:52,748 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-09-23 19:41:52,749 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:52,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:52,749 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 34 times [2018-09-23 19:41:52,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:52,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:52,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:52,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:52,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:55,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:55,402 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:55,402 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:55,409 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:41:55,450 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:41:55,450 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:55,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:55,615 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:55,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2018-09-23 19:41:55,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-23 19:41:55,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-23 19:41:55,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=4830, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:41:55,617 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 71 states. [2018-09-23 19:41:55,890 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 8 [2018-09-23 19:41:56,076 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 9 [2018-09-23 19:41:56,274 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-23 19:41:56,469 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-23 19:41:56,659 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-23 19:41:56,853 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-23 19:41:57,055 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-23 19:41:57,259 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-23 19:41:57,466 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-23 19:41:57,672 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-23 19:41:57,881 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-23 19:41:58,084 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-23 19:41:58,283 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-23 19:41:58,478 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-23 19:41:58,695 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-23 19:41:58,906 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-23 19:41:59,111 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-23 19:41:59,329 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-23 19:41:59,539 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-23 19:41:59,758 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-23 19:41:59,984 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-23 19:42:00,210 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-23 19:42:07,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:07,935 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-09-23 19:42:07,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 19:42:07,936 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 138 [2018-09-23 19:42:07,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:07,937 INFO L225 Difference]: With dead ends: 145 [2018-09-23 19:42:07,937 INFO L226 Difference]: Without dead ends: 143 [2018-09-23 19:42:07,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=4829, Invalid=14077, Unknown=0, NotChecked=0, Total=18906 [2018-09-23 19:42:07,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-23 19:42:07,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-23 19:42:07,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-23 19:42:07,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-23 19:42:07,945 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 138 [2018-09-23 19:42:07,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:07,945 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-23 19:42:07,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-23 19:42:07,946 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-23 19:42:07,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-23 19:42:07,946 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:07,946 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-09-23 19:42:07,946 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:07,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:07,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 35 times [2018-09-23 19:42:07,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:07,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:07,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:07,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:42:07,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:42:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:11,031 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:42:11,031 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:42:11,039 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:42:11,459 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 70 check-sat command(s) [2018-09-23 19:42:11,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:42:11,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:11,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:11,672 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:42:11,672 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2018-09-23 19:42:11,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-23 19:42:11,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-23 19:42:11,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=5112, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 19:42:11,673 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 73 states. [2018-09-23 19:42:11,874 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 8 [2018-09-23 19:42:12,063 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 9 [2018-09-23 19:42:12,264 WARN L178 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-23 19:42:12,471 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-23 19:42:12,675 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-23 19:42:12,874 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-23 19:42:13,078 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-23 19:42:13,277 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-23 19:42:13,486 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-23 19:42:13,698 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-23 19:42:13,907 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-23 19:42:14,120 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-23 19:42:14,332 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-23 19:42:14,536 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-23 19:42:14,757 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-23 19:42:14,984 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-23 19:42:15,236 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-23 19:42:15,558 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-23 19:42:15,814 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-23 19:42:16,048 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-23 19:42:16,281 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-23 19:42:16,510 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-23 19:42:16,741 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-23 19:42:25,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:25,008 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2018-09-23 19:42:25,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-23 19:42:25,009 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 142 [2018-09-23 19:42:25,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:25,010 INFO L225 Difference]: With dead ends: 149 [2018-09-23 19:42:25,010 INFO L226 Difference]: Without dead ends: 147 [2018-09-23 19:42:25,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2347 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=5111, Invalid=14911, Unknown=0, NotChecked=0, Total=20022 [2018-09-23 19:42:25,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-23 19:42:25,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-23 19:42:25,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-23 19:42:25,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-23 19:42:25,020 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 142 [2018-09-23 19:42:25,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:25,020 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-23 19:42:25,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-23 19:42:25,021 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-23 19:42:25,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-23 19:42:25,021 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:25,021 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-09-23 19:42:25,022 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:25,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:25,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 36 times [2018-09-23 19:42:25,022 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:25,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:25,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:25,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:42:25,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:25,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:42:28,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:28,018 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:42:28,018 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:42:28,027 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:42:28,107 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 72 check-sat command(s) [2018-09-23 19:42:28,108 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:42:28,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:28,357 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:42:28,357 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2018-09-23 19:42:28,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-23 19:42:28,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-23 19:42:28,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=5402, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 19:42:28,358 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 75 states. [2018-09-23 19:42:28,664 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 8 [2018-09-23 19:42:28,867 WARN L178 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 9 [2018-09-23 19:42:29,070 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-23 19:42:29,281 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-23 19:42:29,498 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-23 19:42:29,701 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-23 19:42:29,920 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-23 19:42:30,166 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-23 19:42:30,388 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-23 19:42:30,612 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-23 19:42:30,845 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-23 19:42:31,094 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-23 19:42:31,317 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-23 19:42:31,539 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-23 19:42:31,786 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-23 19:42:32,033 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-23 19:42:32,262 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-23 19:42:32,499 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-23 19:42:32,745 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-23 19:42:32,992 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-23 19:42:33,238 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-23 19:42:33,477 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-23 19:42:33,729 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-23 19:42:33,971 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-23 19:42:34,218 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-23 19:42:34,442 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-23 19:42:42,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:42,880 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2018-09-23 19:42:42,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-23 19:42:42,881 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 146 [2018-09-23 19:42:42,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:42,882 INFO L225 Difference]: With dead ends: 153 [2018-09-23 19:42:42,882 INFO L226 Difference]: Without dead ends: 151 [2018-09-23 19:42:42,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2486 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=5401, Invalid=15769, Unknown=0, NotChecked=0, Total=21170 [2018-09-23 19:42:42,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-23 19:42:42,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-23 19:42:42,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-23 19:42:42,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-23 19:42:42,892 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 146 [2018-09-23 19:42:42,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:42,892 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-23 19:42:42,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-23 19:42:42,892 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-23 19:42:42,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-23 19:42:42,893 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:42,893 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-09-23 19:42:42,893 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:42,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:42,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 37 times [2018-09-23 19:42:42,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:42,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:42,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:42,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:42:42,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:42:46,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:46,637 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:42:46,638 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:42:46,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:42:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:42:47,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:47,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:47,856 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:42:47,856 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2018-09-23 19:42:47,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-23 19:42:47,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-23 19:42:47,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=5700, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 19:42:47,857 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 77 states. [2018-09-23 19:42:48,070 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 8 [2018-09-23 19:42:48,276 WARN L178 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 9 [2018-09-23 19:42:48,496 WARN L178 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-23 19:42:48,704 WARN L178 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-23 19:42:48,920 WARN L178 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-23 19:42:49,135 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-23 19:42:49,355 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-23 19:42:49,584 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-23 19:42:49,817 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-23 19:42:50,052 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-23 19:42:50,290 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-23 19:42:50,525 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-23 19:42:50,755 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-23 19:42:50,974 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-23 19:42:51,227 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-23 19:42:51,496 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-23 19:42:51,748 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-23 19:42:52,007 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-23 19:42:52,252 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-23 19:42:52,510 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-23 19:42:52,769 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-23 19:42:53,020 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-23 19:42:53,276 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-23 19:42:53,533 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-23 19:42:53,792 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-23 19:42:54,052 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-23 19:42:54,313 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-23 19:42:54,566 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-23 19:43:01,300 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 11 [2018-09-23 19:43:03,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:43:03,426 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-09-23 19:43:03,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 19:43:03,427 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 150 [2018-09-23 19:43:03,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:43:03,428 INFO L225 Difference]: With dead ends: 157 [2018-09-23 19:43:03,428 INFO L226 Difference]: Without dead ends: 155 [2018-09-23 19:43:03,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=5699, Invalid=16651, Unknown=0, NotChecked=0, Total=22350 [2018-09-23 19:43:03,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-23 19:43:03,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-23 19:43:03,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-23 19:43:03,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-09-23 19:43:03,440 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 150 [2018-09-23 19:43:03,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:43:03,440 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-09-23 19:43:03,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-23 19:43:03,440 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-09-23 19:43:03,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-23 19:43:03,441 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:43:03,441 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-09-23 19:43:03,442 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:43:03,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:43:03,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 38 times [2018-09-23 19:43:03,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:43:03,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:43:03,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:43:03,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:43:03,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:43:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:43:08,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:43:08,335 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:43:08,335 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:43:08,343 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:43:08,934 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:43:08,934 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:43:09,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:43:09,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:43:09,470 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:43:09,470 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2018-09-23 19:43:09,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-23 19:43:09,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-23 19:43:09,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=6006, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 19:43:09,471 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 79 states. [2018-09-23 19:43:09,724 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 8 [2018-09-23 19:43:09,945 WARN L178 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 9 [2018-09-23 19:43:10,173 WARN L178 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-23 19:43:10,405 WARN L178 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-23 19:43:10,645 WARN L178 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-23 19:43:10,869 WARN L178 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-23 19:43:11,101 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-23 19:43:11,335 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-23 19:43:11,574 WARN L178 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-23 19:43:11,847 WARN L178 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-23 19:43:12,097 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-23 19:43:12,353 WARN L178 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-23 19:43:12,589 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-23 19:43:12,824 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-23 19:43:13,077 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-23 19:43:13,327 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-23 19:43:13,585 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-23 19:43:13,851 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-23 19:43:14,106 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-23 19:43:14,381 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-23 19:43:14,655 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-23 19:43:14,936 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-23 19:43:15,217 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-23 19:43:15,532 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 Received shutdown request... [2018-09-23 19:43:15,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 19:43:15,637 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 19:43:15,642 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 19:43:15,642 INFO L202 PluginConnector]: Adding new model count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 07:43:15 BoogieIcfgContainer [2018-09-23 19:43:15,642 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 19:43:15,643 INFO L168 Benchmark]: Toolchain (without parser) took 252463.77 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -187.2 MB). Free memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: 425.3 MB). Peak memory consumption was 238.2 MB. Max. memory is 7.1 GB. [2018-09-23 19:43:15,644 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.91 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:43:15,644 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.51 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:43:15,645 INFO L168 Benchmark]: Boogie Preprocessor took 19.90 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:43:15,645 INFO L168 Benchmark]: RCFGBuilder took 331.50 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-23 19:43:15,645 INFO L168 Benchmark]: TraceAbstraction took 252065.88 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -187.2 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 404.2 MB). Peak memory consumption was 217.0 MB. Max. memory is 7.1 GB. [2018-09-23 19:43:15,647 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.91 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.51 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 19.90 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 331.50 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 252065.88 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -187.2 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 404.2 MB). Peak memory consumption was 217.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 38]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 38). Cancelled while BasicCegarLoop was constructing difference of abstraction (155states) and FLOYD_HOARE automaton (currently 26 states, 79 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 103 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 251.9s OverallTime, 39 OverallIterations, 76 TraceHistogramMax, 187.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 192 SDtfs, 0 SDslu, 2918 SDs, 0 SdLazy, 3071 SolverSat, 1443 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5917 GetRequests, 3003 SyntacticMatches, 0 SemanticMatches, 2913 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33415 ImplicationChecksByTransitivity, 229.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=155occurred in iteration=38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 38 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 8.8s SatisfiabilityAnalysisTime, 53.3s InterpolantComputationTime, 6084 NumberOfCodeBlocks, 6084 NumberOfCodeBlocksAsserted, 780 NumberOfCheckSat, 6007 ConstructedInterpolants, 0 QuantifiedInterpolants, 3090757 SizeOfPredicates, 76 NumberOfNonLiveVariables, 6422 ConjunctsInSsa, 1558 ConjunctsInUnsatCore, 77 InterpolantComputations, 1 PerfectInterpolantSequences, 0/149188 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_k.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_19-43-15-655.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_k.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_19-43-15-655.csv Completed graceful shutdown