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_2.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-4eac566 [2018-09-23 19:38:59,076 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 19:38:59,078 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 19:38:59,091 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 19:38:59,092 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 19:38:59,093 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 19:38:59,094 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 19:38:59,096 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 19:38:59,099 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 19:38:59,100 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 19:38:59,101 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-23 19:38:59,146 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 19:38:59,175 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 19:38:59,175 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 19:38:59,176 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 19:38:59,176 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 19:38:59,177 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 19:38:59,177 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 19:38:59,177 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 19:38:59,177 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 19:38:59,178 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 19:38:59,179 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 19:38:59,179 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 19:38:59,179 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 19:38:59,179 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 19:38:59,179 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 19:38:59,179 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 19:38:59,180 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 19:38:59,180 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 19:38:59,180 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 19:38:59,180 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 19:38:59,182 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 19:38:59,182 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 19:38:59,182 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 19:38:59,182 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:38:59,183 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 19:38:59,183 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 19:38:59,183 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 19:38:59,183 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 19:38:59,183 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 19:38:59,184 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 19:38:59,184 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 19:38:59,244 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 19:38:59,257 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 19:38:59,261 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 19:38:59,263 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 19:38:59,263 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 19:38:59,264 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_2.i_3.bpl [2018-09-23 19:38:59,264 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_2.i_3.bpl' [2018-09-23 19:38:59,314 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 19:38:59,318 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 19:38:59,318 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 19:38:59,319 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 19:38:59,319 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 19:38:59,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:38:59" (1/1) ... [2018-09-23 19:38:59,352 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:38:59" (1/1) ... [2018-09-23 19:38:59,359 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 19:38:59,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 19:38:59,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 19:38:59,360 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 19:38:59,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:38:59" (1/1) ... [2018-09-23 19:38:59,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:38:59" (1/1) ... [2018-09-23 19:38:59,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:38:59" (1/1) ... [2018-09-23 19:38:59,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:38:59" (1/1) ... [2018-09-23 19:38:59,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:38:59" (1/1) ... [2018-09-23 19:38:59,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:38:59" (1/1) ... [2018-09-23 19:38:59,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:38:59" (1/1) ... [2018-09-23 19:38:59,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 19:38:59,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 19:38:59,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 19:38:59,382 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 19:38:59,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:38:59" (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 19:38:59,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-23 19:38:59,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-23 19:38:59,676 INFO L354 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-23 19:38:59,677 INFO L202 PluginConnector]: Adding new model count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:38:59 BoogieIcfgContainer [2018-09-23 19:38:59,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 19:38:59,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 19:38:59,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 19:38:59,682 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 19:38:59,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:38:59" (1/2) ... [2018-09-23 19:38:59,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@110bc91f and model type count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 07:38:59, skipping insertion in model container [2018-09-23 19:38:59,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:38:59" (2/2) ... [2018-09-23 19:38:59,690 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_2.i_3.bpl [2018-09-23 19:38:59,699 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 19:38:59,707 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 19:38:59,762 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 19:38:59,763 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 19:38:59,763 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 19:38:59,763 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 19:38:59,763 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 19:38:59,763 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 19:38:59,764 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 19:38:59,764 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 19:38:59,764 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 19:38:59,779 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-23 19:38:59,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-23 19:38:59,785 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:59,786 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-23 19:38:59,788 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:59,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:59,794 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-23 19:38:59,796 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:59,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:59,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:59,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:38:59,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:59,939 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 19:38:59,941 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:38:59,942 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-23 19:38:59,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 19:38:59,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 19:38:59,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:38:59,961 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-23 19:39:00,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:00,020 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-23 19:39:00,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 19:39:00,022 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-23 19:39:00,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:00,032 INFO L225 Difference]: With dead ends: 11 [2018-09-23 19:39:00,032 INFO L226 Difference]: Without dead ends: 7 [2018-09-23 19:39:00,036 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 19:39:00,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-23 19:39:00,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-23 19:39:00,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-23 19:39:00,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-23 19:39:00,073 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-23 19:39:00,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:00,074 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-23 19:39:00,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 19:39:00,074 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-23 19:39:00,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-23 19:39:00,075 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:00,075 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-23 19:39:00,075 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:00,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:00,076 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-23 19:39:00,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:00,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:00,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:00,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:00,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:00,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:00,186 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 19:39:00,187 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:00,187 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 19:39:00,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:00,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:00,265 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 19:39:00,296 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:00,296 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-23 19:39:00,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 19:39:00,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 19:39:00,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:39:00,298 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-09-23 19:39:00,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:00,349 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-23 19:39:00,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 19:39:00,350 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-23 19:39:00,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:00,350 INFO L225 Difference]: With dead ends: 11 [2018-09-23 19:39:00,351 INFO L226 Difference]: Without dead ends: 9 [2018-09-23 19:39:00,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:39:00,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-23 19:39:00,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-23 19:39:00,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 19:39:00,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-23 19:39:00,355 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-23 19:39:00,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:00,355 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-23 19:39:00,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 19:39:00,356 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-23 19:39:00,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 19:39:00,356 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:00,356 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-23 19:39:00,357 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:00,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:00,357 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-09-23 19:39:00,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:00,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:00,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:00,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:00,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:00,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:00,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:00,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:00,456 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 19:39:00,466 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:39:00,489 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:39:00,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:00,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:00,522 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:00,522 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 19:39:00,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 19:39:00,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 19:39:00,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:39:00,523 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-09-23 19:39:00,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:00,588 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-23 19:39:00,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 19:39:00,589 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-23 19:39:00,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:00,590 INFO L225 Difference]: With dead ends: 13 [2018-09-23 19:39:00,590 INFO L226 Difference]: Without dead ends: 11 [2018-09-23 19:39:00,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:39:00,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-23 19:39:00,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-23 19:39:00,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-23 19:39:00,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-23 19:39:00,594 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-23 19:39:00,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:00,594 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-23 19:39:00,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 19:39:00,595 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-23 19:39:00,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 19:39:00,595 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:00,595 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-23 19:39:00,596 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:00,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:00,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-09-23 19:39:00,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:00,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:00,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:00,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:00,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:00,712 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 19:39:00,712 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:00,712 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 19:39:00,722 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:39:00,735 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-23 19:39:00,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:00,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:00,743 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 19:39:00,763 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:00,763 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 19:39:00,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 19:39:00,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 19:39:00,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:39:00,764 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-09-23 19:39:00,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:00,798 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-23 19:39:00,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:39:00,798 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-23 19:39:00,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:00,799 INFO L225 Difference]: With dead ends: 15 [2018-09-23 19:39:00,799 INFO L226 Difference]: Without dead ends: 13 [2018-09-23 19:39:00,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:39:00,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-23 19:39:00,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-23 19:39:00,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-23 19:39:00,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-23 19:39:00,803 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-23 19:39:00,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:00,804 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-23 19:39:00,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 19:39:00,804 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-23 19:39:00,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 19:39:00,805 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:00,805 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-23 19:39:00,805 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:00,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:00,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-09-23 19:39:00,806 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:00,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:00,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:00,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:00,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:01,080 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:01,080 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:01,080 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 19:39:01,102 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:39:01,134 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:39:01,134 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:01,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:01,143 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:01,166 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:01,166 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:39:01,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:39:01,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:39:01,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:39:01,167 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-09-23 19:39:01,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:01,201 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-23 19:39:01,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:39:01,202 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-23 19:39:01,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:01,203 INFO L225 Difference]: With dead ends: 17 [2018-09-23 19:39:01,203 INFO L226 Difference]: Without dead ends: 15 [2018-09-23 19:39:01,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:39:01,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-23 19:39:01,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-23 19:39:01,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-23 19:39:01,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-23 19:39:01,209 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-23 19:39:01,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:01,210 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-23 19:39:01,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:39:01,210 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-23 19:39:01,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 19:39:01,211 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:01,211 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-23 19:39:01,211 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:01,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:01,212 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-09-23 19:39:01,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:01,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:01,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:01,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:01,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:01,363 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 19:39:01,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:01,364 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 19:39:01,372 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:39:01,391 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-23 19:39:01,391 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:01,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:01,406 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 19:39:01,429 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:01,429 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:39:01,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:39:01,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:39:01,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:39:01,432 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-09-23 19:39:01,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:01,470 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-23 19:39:01,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:39:01,474 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-23 19:39:01,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:01,475 INFO L225 Difference]: With dead ends: 19 [2018-09-23 19:39:01,475 INFO L226 Difference]: Without dead ends: 17 [2018-09-23 19:39:01,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:39:01,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-23 19:39:01,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-23 19:39:01,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-23 19:39:01,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-23 19:39:01,480 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-23 19:39:01,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:01,480 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-23 19:39:01,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:39:01,480 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-23 19:39:01,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 19:39:01,481 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:01,481 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-09-23 19:39:01,481 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:01,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:01,482 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-09-23 19:39:01,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:01,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:01,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:01,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:01,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:01,684 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:01,684 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:01,684 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 19:39:01,699 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:39:01,712 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 19:39:01,713 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:01,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:01,723 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:01,747 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:01,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:39:01,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:39:01,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:39:01,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:39:01,749 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-09-23 19:39:01,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:01,800 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-23 19:39:01,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:39:01,802 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-23 19:39:01,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:01,802 INFO L225 Difference]: With dead ends: 21 [2018-09-23 19:39:01,802 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 19:39:01,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:39:01,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 19:39:01,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-23 19:39:01,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 19:39:01,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-23 19:39:01,807 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-23 19:39:01,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:01,808 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-23 19:39:01,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:39:01,808 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-23 19:39:01,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:39:01,809 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:01,809 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-23 19:39:01,809 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:01,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:01,809 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-09-23 19:39:01,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:01,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:01,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:01,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:01,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:01,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:01,979 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 19:39:01,979 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:01,979 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 19:39:01,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:02,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:02,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:02,027 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 19:39:02,061 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:02,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:39:02,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:39:02,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:39:02,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:39:02,063 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-09-23 19:39:02,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:02,300 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-23 19:39:02,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:39:02,301 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-23 19:39:02,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:02,302 INFO L225 Difference]: With dead ends: 23 [2018-09-23 19:39:02,302 INFO L226 Difference]: Without dead ends: 21 [2018-09-23 19:39:02,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:39:02,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-23 19:39:02,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-23 19:39:02,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-23 19:39:02,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-23 19:39:02,309 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-23 19:39:02,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:02,309 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-23 19:39:02,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:39:02,311 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-23 19:39:02,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 19:39:02,312 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:02,312 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-09-23 19:39:02,313 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:02,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:02,313 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-09-23 19:39:02,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:02,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:02,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:02,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:02,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:02,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:02,476 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:02,477 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:02,477 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 19:39:02,492 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:39:02,507 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:39:02,508 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:02,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:02,528 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:02,561 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:02,561 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:39:02,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:39:02,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:39:02,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:39:02,566 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-09-23 19:39:02,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:02,633 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-23 19:39:02,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:39:02,633 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-23 19:39:02,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:02,634 INFO L225 Difference]: With dead ends: 25 [2018-09-23 19:39:02,634 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 19:39:02,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:39:02,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 19:39:02,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-23 19:39:02,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-23 19:39:02,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-23 19:39:02,640 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-23 19:39:02,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:02,640 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-23 19:39:02,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:39:02,640 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-23 19:39:02,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 19:39:02,641 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:02,641 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-23 19:39:02,642 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:02,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:02,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-09-23 19:39:02,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:02,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:02,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:02,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:02,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:02,830 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 19:39:02,830 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:02,830 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 19:39:02,841 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:39:02,856 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-23 19:39:02,857 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:02,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:02,868 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 19:39:02,894 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:02,894 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-23 19:39:02,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:39:02,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:39:02,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:39:02,895 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-09-23 19:39:02,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:02,934 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-23 19:39:02,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 19:39:02,934 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-23 19:39:02,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:02,935 INFO L225 Difference]: With dead ends: 27 [2018-09-23 19:39:02,935 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 19:39:02,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:39:02,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 19:39:02,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-23 19:39:02,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 19:39:02,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-23 19:39:02,941 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-23 19:39:02,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:02,942 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-23 19:39:02,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:39:02,942 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-23 19:39:02,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 19:39:02,943 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:02,943 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-09-23 19:39:02,943 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:02,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:02,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-09-23 19:39:02,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:02,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:02,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:02,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:02,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:02,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:03,172 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:03,173 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:03,173 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 19:39:03,181 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:39:03,190 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:39:03,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:03,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:03,202 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:03,224 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:03,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-23 19:39:03,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:39:03,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:39:03,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:39:03,226 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-09-23 19:39:03,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:03,274 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-23 19:39:03,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:39:03,274 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-23 19:39:03,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:03,276 INFO L225 Difference]: With dead ends: 29 [2018-09-23 19:39:03,276 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 19:39:03,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:39:03,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 19:39:03,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-23 19:39:03,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-23 19:39:03,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-23 19:39:03,282 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-23 19:39:03,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:03,283 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-23 19:39:03,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:39:03,283 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-23 19:39:03,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 19:39:03,284 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:03,284 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-09-23 19:39:03,284 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:03,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:03,284 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-09-23 19:39:03,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:03,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:03,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:03,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:03,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:03,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:03,523 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 19:39:03,523 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:03,523 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 19:39:03,534 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:39:03,549 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-23 19:39:03,550 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:03,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:03,563 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 19:39:03,586 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:03,586 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 19:39:03,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:39:03,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:39:03,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:39:03,587 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-09-23 19:39:03,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:03,827 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-23 19:39:03,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 19:39:03,831 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-23 19:39:03,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:03,832 INFO L225 Difference]: With dead ends: 31 [2018-09-23 19:39:03,832 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 19:39:03,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:39:03,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 19:39:03,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-23 19:39:03,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 19:39:03,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-23 19:39:03,841 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-23 19:39:03,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:03,841 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-23 19:39:03,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:39:03,841 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-23 19:39:03,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 19:39:03,842 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:03,842 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-09-23 19:39:03,843 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:03,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:03,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-09-23 19:39:03,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:03,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:03,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:03,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:03,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:04,076 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:04,076 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:04,077 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 19:39:04,084 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:39:04,100 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-23 19:39:04,101 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:04,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:04,113 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:04,142 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:04,142 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-23 19:39:04,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:39:04,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:39:04,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:39:04,145 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-09-23 19:39:04,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:04,217 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-23 19:39:04,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 19:39:04,218 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-23 19:39:04,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:04,219 INFO L225 Difference]: With dead ends: 33 [2018-09-23 19:39:04,219 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 19:39:04,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:39:04,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 19:39:04,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-23 19:39:04,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 19:39:04,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-23 19:39:04,225 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-23 19:39:04,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:04,225 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-23 19:39:04,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:39:04,226 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-23 19:39:04,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-23 19:39:04,226 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:04,226 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-09-23 19:39:04,227 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:04,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:04,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-09-23 19:39:04,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:04,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:04,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:04,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:04,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:04,507 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 19:39:04,508 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:04,508 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 19:39:04,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:04,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:04,541 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 19:39:04,562 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:04,562 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 19:39:04,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:39:04,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:39:04,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:39:04,564 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-09-23 19:39:04,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:04,605 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-23 19:39:04,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 19:39:04,606 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-23 19:39:04,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:04,607 INFO L225 Difference]: With dead ends: 35 [2018-09-23 19:39:04,608 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 19:39:04,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:39:04,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 19:39:04,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-23 19:39:04,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-23 19:39:04,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-23 19:39:04,615 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-23 19:39:04,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:04,615 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-23 19:39:04,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:39:04,616 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-23 19:39:04,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 19:39:04,617 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:04,617 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-09-23 19:39:04,617 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:04,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:04,617 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-09-23 19:39:04,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:04,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:04,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:04,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:04,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:04,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:04,862 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:04,862 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:04,863 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 19:39:04,872 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:39:04,912 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:39:04,912 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:04,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:04,926 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:04,952 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:04,953 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-23 19:39:04,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:39:04,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:39:04,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:39:04,954 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-09-23 19:39:04,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:04,997 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-23 19:39:04,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:39:04,998 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-23 19:39:04,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:04,999 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:39:04,999 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:39:05,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:39:05,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:39:05,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-23 19:39:05,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-23 19:39:05,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-23 19:39:05,005 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-23 19:39:05,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:05,005 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-23 19:39:05,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:39:05,005 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-23 19:39:05,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 19:39:05,006 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:05,006 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-09-23 19:39:05,007 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:05,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:05,007 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-09-23 19:39:05,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:05,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:05,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:05,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:05,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:05,233 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 19:39:05,233 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:05,234 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 19:39:05,243 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:39:05,257 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-23 19:39:05,257 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:05,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:05,270 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 19:39:05,296 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:05,296 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-23 19:39:05,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:39:05,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:39:05,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:39:05,297 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-09-23 19:39:05,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:05,348 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-23 19:39:05,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 19:39:05,349 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-23 19:39:05,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:05,350 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:39:05,350 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:39:05,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:39:05,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:39:05,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-23 19:39:05,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-23 19:39:05,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-23 19:39:05,355 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-09-23 19:39:05,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:05,356 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-23 19:39:05,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:39:05,356 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-23 19:39:05,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-23 19:39:05,357 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:05,357 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-09-23 19:39:05,357 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:05,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:05,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-09-23 19:39:05,358 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:05,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:05,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:05,359 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:05,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:05,659 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:05,659 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:05,659 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 19:39:05,668 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:39:05,708 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:39:05,709 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:05,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:05,753 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:05,754 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-23 19:39:05,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 19:39:05,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 19:39:05,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:39:05,755 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-09-23 19:39:05,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:05,884 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-23 19:39:05,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 19:39:05,885 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-23 19:39:05,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:05,886 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:39:05,886 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:39:05,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:39:05,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:39:05,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-23 19:39:05,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 19:39:05,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-23 19:39:05,892 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-09-23 19:39:05,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:05,892 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-23 19:39:05,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 19:39:05,893 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-23 19:39:05,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 19:39:05,893 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:05,893 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-09-23 19:39:05,894 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:05,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:05,894 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-09-23 19:39:05,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:05,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:05,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:05,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:05,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:05,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:06,413 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 19:39:06,413 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:06,413 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 19:39:06,421 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:39:06,439 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-23 19:39:06,440 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:06,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:06,453 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 19:39:06,477 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:06,477 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 19:39:06,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 19:39:06,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 19:39:06,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:39:06,478 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-09-23 19:39:06,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:06,596 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-23 19:39:06,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 19:39:06,597 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-23 19:39:06,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:06,597 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:39:06,597 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:39:06,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:39:06,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:39:06,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-23 19:39:06,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 19:39:06,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-23 19:39:06,602 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-09-23 19:39:06,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:06,602 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-23 19:39:06,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 19:39:06,602 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-23 19:39:06,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-23 19:39:06,603 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:06,603 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-09-23 19:39:06,604 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:06,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:06,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-09-23 19:39:06,604 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:06,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:06,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:06,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:06,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:07,173 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:07,173 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:07,174 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 19:39:07,181 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:39:07,241 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-23 19:39:07,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:07,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:07,255 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:07,284 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:07,284 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-23 19:39:07,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 19:39:07,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 19:39:07,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:39:07,285 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-09-23 19:39:07,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:07,364 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-23 19:39:07,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 19:39:07,364 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-23 19:39:07,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:07,365 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:39:07,365 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:39:07,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:39:07,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:39:07,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-23 19:39:07,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 19:39:07,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-23 19:39:07,370 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-09-23 19:39:07,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:07,370 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-23 19:39:07,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 19:39:07,370 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-23 19:39:07,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 19:39:07,371 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:07,371 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-09-23 19:39:07,371 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:07,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:07,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-09-23 19:39:07,371 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:07,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:07,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:07,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:07,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:07,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:07,630 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 19:39:07,631 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:07,631 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 19:39:07,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:07,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:07,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:07,667 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 19:39:07,697 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:07,697 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 19:39:07,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 19:39:07,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 19:39:07,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:39:07,698 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-09-23 19:39:07,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:07,870 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-23 19:39:07,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 19:39:07,871 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-23 19:39:07,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:07,872 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:39:07,872 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:39:07,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:39:07,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:39:07,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-23 19:39:07,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-23 19:39:07,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-23 19:39:07,878 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-09-23 19:39:07,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:07,879 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-23 19:39:07,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 19:39:07,879 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-23 19:39:07,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 19:39:07,879 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:07,880 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-09-23 19:39:07,880 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:07,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:07,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-09-23 19:39:07,880 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:07,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:07,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:07,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:07,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:07,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:08,182 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:08,182 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:08,182 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 19:39:08,197 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:39:08,211 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:39:08,211 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:08,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:08,240 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:08,270 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:08,270 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-23 19:39:08,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 19:39:08,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 19:39:08,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:39:08,271 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-09-23 19:39:08,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:08,451 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-23 19:39:08,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:39:08,451 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-23 19:39:08,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:08,452 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:39:08,452 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:39:08,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:39:08,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:39:08,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-23 19:39:08,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 19:39:08,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-23 19:39:08,459 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-09-23 19:39:08,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:08,459 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-23 19:39:08,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 19:39:08,459 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-23 19:39:08,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-23 19:39:08,460 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:08,460 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-09-23 19:39:08,461 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:08,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:08,461 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-09-23 19:39:08,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:08,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:08,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:08,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:08,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:08,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:08,827 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 19:39:08,828 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:08,828 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 19:39:08,835 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:39:08,864 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-23 19:39:08,864 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:08,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:08,879 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 19:39:08,909 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:08,909 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-23 19:39:08,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 19:39:08,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 19:39:08,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:39:08,910 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-09-23 19:39:09,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:09,093 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-23 19:39:09,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 19:39:09,096 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-23 19:39:09,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:09,097 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:39:09,097 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:39:09,097 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:39:09,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:39:09,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-23 19:39:09,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-23 19:39:09,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-23 19:39:09,101 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-09-23 19:39:09,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:09,101 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-23 19:39:09,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 19:39:09,101 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-23 19:39:09,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-23 19:39:09,102 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:09,102 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-09-23 19:39:09,102 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:09,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:09,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-09-23 19:39:09,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:09,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:09,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:09,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:09,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:09,565 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:09,565 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:09,565 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 19:39:09,573 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:39:09,588 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:39:09,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:09,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:09,604 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:09,627 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:09,627 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-23 19:39:09,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 19:39:09,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 19:39:09,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:39:09,629 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-09-23 19:39:09,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:09,696 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-23 19:39:09,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 19:39:09,697 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-23 19:39:09,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:09,697 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:39:09,697 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:39:09,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:39:09,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:39:09,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-23 19:39:09,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-23 19:39:09,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-23 19:39:09,704 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-09-23 19:39:09,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:09,704 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-23 19:39:09,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 19:39:09,704 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-23 19:39:09,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 19:39:09,705 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:09,705 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-09-23 19:39:09,706 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:09,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:09,706 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-09-23 19:39:09,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:09,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:09,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:09,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:09,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:10,252 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 19:39:10,252 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:10,252 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 19:39:10,264 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:39:10,287 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-23 19:39:10,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:10,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:10,301 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 19:39:10,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:10,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 19:39:10,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 19:39:10,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 19:39:10,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:39:10,332 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-09-23 19:39:10,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:10,524 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-23 19:39:10,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 19:39:10,524 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-23 19:39:10,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:10,525 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:39:10,525 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:39:10,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:39:10,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:39:10,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-23 19:39:10,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-23 19:39:10,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-23 19:39:10,531 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-09-23 19:39:10,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:10,531 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-23 19:39:10,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 19:39:10,531 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-23 19:39:10,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-23 19:39:10,532 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:10,532 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-09-23 19:39:10,532 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:10,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:10,532 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-09-23 19:39:10,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:10,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:10,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:10,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:10,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:11,384 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:11,384 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:11,384 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 19:39:11,393 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:39:11,467 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-23 19:39:11,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:11,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:11,482 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:11,510 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:11,511 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-23 19:39:11,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 19:39:11,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 19:39:11,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:39:11,512 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-09-23 19:39:11,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:11,564 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-23 19:39:11,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:39:11,565 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-23 19:39:11,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:11,566 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:39:11,566 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:39:11,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:39:11,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:39:11,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-23 19:39:11,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-23 19:39:11,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-23 19:39:11,572 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-09-23 19:39:11,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:11,573 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-23 19:39:11,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 19:39:11,573 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-23 19:39:11,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-23 19:39:11,573 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:11,574 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-09-23 19:39:11,574 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:11,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:11,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-09-23 19:39:11,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:11,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:11,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:11,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:11,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:11,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:12,281 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 19:39:12,281 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:12,281 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 19:39:12,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:12,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:12,320 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 19:39:12,348 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:12,348 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 19:39:12,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 19:39:12,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 19:39:12,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:39:12,349 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-09-23 19:39:12,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:12,400 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-23 19:39:12,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 19:39:12,400 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-23 19:39:12,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:12,401 INFO L225 Difference]: With dead ends: 59 [2018-09-23 19:39:12,401 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 19:39:12,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:39:12,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 19:39:12,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-23 19:39:12,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-23 19:39:12,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-23 19:39:12,405 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-09-23 19:39:12,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:12,405 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-23 19:39:12,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 19:39:12,406 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-23 19:39:12,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-23 19:39:12,406 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:12,406 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-09-23 19:39:12,406 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:12,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:12,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-09-23 19:39:12,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:12,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:12,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:12,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:12,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:12,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:13,629 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:13,629 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:13,629 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 19:39:13,636 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:39:13,653 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:39:13,653 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:13,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:13,667 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:13,698 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:13,698 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-23 19:39:13,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 19:39:13,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 19:39:13,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:39:13,699 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-09-23 19:39:13,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:13,800 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-23 19:39:13,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:39:13,801 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-23 19:39:13,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:13,801 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:39:13,801 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:39:13,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:39:13,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:39:13,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-23 19:39:13,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 19:39:13,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-23 19:39:13,804 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-09-23 19:39:13,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:13,805 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-23 19:39:13,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 19:39:13,805 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-23 19:39:13,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 19:39:13,806 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:13,806 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-09-23 19:39:13,806 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:13,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:13,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-09-23 19:39:13,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:13,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:13,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:13,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:13,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:13,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:14,860 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 19:39:14,860 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:14,860 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 19:39:14,869 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:39:14,893 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-23 19:39:14,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:14,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:14,921 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 19:39:14,941 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:14,941 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-23 19:39:14,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 19:39:14,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 19:39:14,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:39:14,942 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-09-23 19:39:14,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:14,983 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-23 19:39:14,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 19:39:14,983 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-23 19:39:14,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:14,984 INFO L225 Difference]: With dead ends: 63 [2018-09-23 19:39:14,984 INFO L226 Difference]: Without dead ends: 61 [2018-09-23 19:39:14,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:39:14,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-23 19:39:14,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-23 19:39:14,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-23 19:39:14,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-23 19:39:14,989 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-09-23 19:39:14,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:14,989 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-23 19:39:14,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 19:39:14,989 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-23 19:39:14,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-23 19:39:14,990 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:14,990 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-09-23 19:39:14,990 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:14,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:14,991 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-09-23 19:39:14,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:14,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:14,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:14,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:14,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:15,527 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:15,527 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:15,527 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 19:39:15,535 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:39:15,551 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:39:15,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:15,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:15,566 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:15,592 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:15,592 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-23 19:39:15,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 19:39:15,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 19:39:15,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:39:15,593 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-09-23 19:39:15,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:15,673 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-23 19:39:15,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 19:39:15,673 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-23 19:39:15,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:15,674 INFO L225 Difference]: With dead ends: 65 [2018-09-23 19:39:15,675 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 19:39:15,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:39:15,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 19:39:15,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-23 19:39:15,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-23 19:39:15,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-23 19:39:15,679 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-09-23 19:39:15,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:15,679 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-23 19:39:15,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 19:39:15,679 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-23 19:39:15,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 19:39:15,680 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:15,680 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-09-23 19:39:15,680 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:15,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:15,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-09-23 19:39:15,681 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:15,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:15,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:15,682 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:15,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:16,423 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 19:39:16,423 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:16,423 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 19:39:16,430 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:39:16,458 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-23 19:39:16,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:16,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:16,475 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 19:39:16,495 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:16,495 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 19:39:16,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 19:39:16,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 19:39:16,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:39:16,496 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-09-23 19:39:16,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:16,588 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-23 19:39:16,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 19:39:16,589 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-23 19:39:16,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:16,590 INFO L225 Difference]: With dead ends: 67 [2018-09-23 19:39:16,590 INFO L226 Difference]: Without dead ends: 65 [2018-09-23 19:39:16,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:39:16,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-23 19:39:16,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-23 19:39:16,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-23 19:39:16,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-23 19:39:16,596 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-09-23 19:39:16,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:16,596 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-23 19:39:16,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 19:39:16,596 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-23 19:39:16,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-23 19:39:16,597 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:16,597 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-09-23 19:39:16,597 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:16,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:16,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-09-23 19:39:16,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:16,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:16,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:16,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:16,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:16,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:17,271 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:17,272 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:17,272 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 19:39:17,280 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:39:17,316 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-23 19:39:17,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:17,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:17,351 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:17,351 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-23 19:39:17,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 19:39:17,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 19:39:17,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:39:17,352 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-09-23 19:39:17,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:17,415 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-23 19:39:17,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 19:39:17,415 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-23 19:39:17,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:17,416 INFO L225 Difference]: With dead ends: 69 [2018-09-23 19:39:17,416 INFO L226 Difference]: Without dead ends: 67 [2018-09-23 19:39:17,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:39:17,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-23 19:39:17,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-23 19:39:17,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-23 19:39:17,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-23 19:39:17,420 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-09-23 19:39:17,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:17,421 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-23 19:39:17,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 19:39:17,421 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-23 19:39:17,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-23 19:39:17,421 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:17,421 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-09-23 19:39:17,422 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:17,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:17,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-09-23 19:39:17,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:17,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:17,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:17,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:17,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:17,935 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 19:39:17,935 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:17,935 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 19:39:17,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:17,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:17,975 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 19:39:17,996 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:17,996 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-23 19:39:17,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 19:39:17,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 19:39:17,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:39:17,997 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-09-23 19:39:18,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:18,053 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-23 19:39:18,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 19:39:18,054 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-23 19:39:18,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:18,055 INFO L225 Difference]: With dead ends: 71 [2018-09-23 19:39:18,055 INFO L226 Difference]: Without dead ends: 69 [2018-09-23 19:39:18,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:39:18,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-23 19:39:18,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-23 19:39:18,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-23 19:39:18,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-23 19:39:18,057 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-09-23 19:39:18,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:18,058 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-23 19:39:18,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 19:39:18,058 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-23 19:39:18,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-23 19:39:18,058 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:18,058 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-09-23 19:39:18,059 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:18,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:18,059 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-09-23 19:39:18,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:18,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:18,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:18,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:18,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:18,520 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:18,520 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 19:39:18,528 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:39:18,558 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:39:18,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:18,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:18,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:18,602 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:18,602 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-23 19:39:18,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 19:39:18,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 19:39:18,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:39:18,603 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-09-23 19:39:18,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:18,697 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-23 19:39:18,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 19:39:18,698 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-23 19:39:18,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:18,699 INFO L225 Difference]: With dead ends: 73 [2018-09-23 19:39:18,699 INFO L226 Difference]: Without dead ends: 71 [2018-09-23 19:39:18,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:39:18,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-23 19:39:18,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-23 19:39:18,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-23 19:39:18,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-23 19:39:18,703 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-09-23 19:39:18,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:18,704 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-23 19:39:18,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 19:39:18,704 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-23 19:39:18,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-23 19:39:18,704 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:18,704 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-09-23 19:39:18,705 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:18,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:18,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-09-23 19:39:18,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:18,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:18,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:18,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:18,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:20,010 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 19:39:20,010 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:20,010 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:39:20,017 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:39:20,046 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-23 19:39:20,046 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:20,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:20,060 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 19:39:20,089 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:20,090 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-23 19:39:20,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 19:39:20,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 19:39:20,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:39:20,091 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-09-23 19:39:20,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:20,184 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-23 19:39:20,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 19:39:20,185 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-23 19:39:20,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:20,185 INFO L225 Difference]: With dead ends: 75 [2018-09-23 19:39:20,186 INFO L226 Difference]: Without dead ends: 73 [2018-09-23 19:39:20,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:39:20,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-23 19:39:20,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-23 19:39:20,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-23 19:39:20,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-23 19:39:20,189 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-09-23 19:39:20,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:20,190 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-23 19:39:20,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 19:39:20,190 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-23 19:39:20,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-23 19:39:20,190 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:20,190 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-09-23 19:39:20,191 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:20,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:20,191 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-09-23 19:39:20,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:20,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:20,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:20,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:20,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:20,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:21,013 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:21,013 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 19:39:21,021 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:39:21,044 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:39:21,045 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:21,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:21,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:21,082 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:21,082 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-23 19:39:21,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 19:39:21,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 19:39:21,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:39:21,083 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-09-23 19:39:21,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:21,273 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-23 19:39:21,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 19:39:21,273 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-23 19:39:21,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:21,274 INFO L225 Difference]: With dead ends: 77 [2018-09-23 19:39:21,274 INFO L226 Difference]: Without dead ends: 75 [2018-09-23 19:39:21,275 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:39:21,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-23 19:39:21,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-23 19:39:21,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-23 19:39:21,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-23 19:39:21,279 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-09-23 19:39:21,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:21,279 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-23 19:39:21,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 19:39:21,279 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-23 19:39:21,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-23 19:39:21,280 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:21,280 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-09-23 19:39:21,280 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:21,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:21,281 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-09-23 19:39:21,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:21,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:21,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:21,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:21,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:22,072 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 19:39:22,072 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:22,072 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 19:39:22,079 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:39:22,110 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-23 19:39:22,111 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:22,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:22,130 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 19:39:22,152 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:22,152 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 19:39:22,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 19:39:22,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 19:39:22,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:39:22,154 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-09-23 19:39:22,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:22,210 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-23 19:39:22,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 19:39:22,212 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-23 19:39:22,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:22,213 INFO L225 Difference]: With dead ends: 79 [2018-09-23 19:39:22,213 INFO L226 Difference]: Without dead ends: 77 [2018-09-23 19:39:22,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:39:22,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-23 19:39:22,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-23 19:39:22,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-23 19:39:22,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-23 19:39:22,216 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-09-23 19:39:22,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:22,216 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-23 19:39:22,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 19:39:22,216 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-23 19:39:22,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-23 19:39:22,216 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:22,217 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-09-23 19:39:22,217 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:22,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:22,217 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-09-23 19:39:22,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:22,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:22,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:22,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:22,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:22,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:22,952 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 19:39:22,959 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:39:22,993 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-23 19:39:22,994 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:22,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:23,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:23,044 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:23,044 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-23 19:39:23,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 19:39:23,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 19:39:23,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:39:23,045 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-09-23 19:39:23,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:23,425 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-23 19:39:23,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 19:39:23,427 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-23 19:39:23,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:23,427 INFO L225 Difference]: With dead ends: 81 [2018-09-23 19:39:23,428 INFO L226 Difference]: Without dead ends: 79 [2018-09-23 19:39:23,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:39:23,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-23 19:39:23,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-23 19:39:23,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-23 19:39:23,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-23 19:39:23,430 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-09-23 19:39:23,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:23,431 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-23 19:39:23,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 19:39:23,431 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-23 19:39:23,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-23 19:39:23,431 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:23,432 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-09-23 19:39:23,432 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:23,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:23,432 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-09-23 19:39:23,432 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:23,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:23,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:23,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:23,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:23,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:24,062 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 19:39:24,062 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:24,062 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 19:39:24,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:24,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:24,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:24,118 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 19:39:24,148 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:24,149 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-23 19:39:24,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 19:39:24,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 19:39:24,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:39:24,150 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-09-23 19:39:24,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:24,241 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-23 19:39:24,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 19:39:24,241 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-23 19:39:24,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:24,242 INFO L225 Difference]: With dead ends: 83 [2018-09-23 19:39:24,242 INFO L226 Difference]: Without dead ends: 81 [2018-09-23 19:39:24,244 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:39:24,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-23 19:39:24,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-23 19:39:24,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-23 19:39:24,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-23 19:39:24,247 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-09-23 19:39:24,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:24,247 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-23 19:39:24,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 19:39:24,247 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-23 19:39:24,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-23 19:39:24,248 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:24,248 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-09-23 19:39:24,248 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:24,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:24,248 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-09-23 19:39:24,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:24,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:24,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:24,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:24,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:24,852 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:24,852 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 19:39:24,861 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:39:24,883 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:39:24,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:24,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:24,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:24,925 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-23 19:39:24,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 19:39:24,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 19:39:24,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:39:24,927 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-09-23 19:39:24,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:24,999 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-23 19:39:24,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 19:39:24,999 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-23 19:39:25,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:25,000 INFO L225 Difference]: With dead ends: 85 [2018-09-23 19:39:25,000 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 19:39:25,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:39:25,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 19:39:25,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-23 19:39:25,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-23 19:39:25,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-23 19:39:25,004 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-09-23 19:39:25,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:25,005 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-23 19:39:25,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 19:39:25,005 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-23 19:39:25,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-23 19:39:25,005 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:25,005 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-09-23 19:39:25,005 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:25,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:25,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-09-23 19:39:25,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:25,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:25,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:25,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:25,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:25,994 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 19:39:25,994 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:25,994 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:26,004 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:39:26,040 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-23 19:39:26,040 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:26,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:26,058 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 19:39:26,079 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:26,080 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-23 19:39:26,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 19:39:26,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 19:39:26,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:39:26,081 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-09-23 19:39:26,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:26,183 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-23 19:39:26,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 19:39:26,183 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-23 19:39:26,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:26,185 INFO L225 Difference]: With dead ends: 87 [2018-09-23 19:39:26,185 INFO L226 Difference]: Without dead ends: 85 [2018-09-23 19:39:26,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:39:26,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-23 19:39:26,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-23 19:39:26,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-23 19:39:26,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-23 19:39:26,189 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-09-23 19:39:26,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:26,189 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-23 19:39:26,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 19:39:26,189 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-23 19:39:26,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-23 19:39:26,189 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:26,189 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-09-23 19:39:26,190 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:26,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:26,190 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-09-23 19:39:26,190 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:26,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:26,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:26,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:26,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:27,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:27,284 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:27,284 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:27,291 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:39:27,315 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:39:27,315 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:27,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:27,350 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:27,350 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-23 19:39:27,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 19:39:27,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 19:39:27,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:39:27,351 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-09-23 19:39:27,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:27,422 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-23 19:39:27,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 19:39:27,422 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-09-23 19:39:27,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:27,423 INFO L225 Difference]: With dead ends: 89 [2018-09-23 19:39:27,424 INFO L226 Difference]: Without dead ends: 87 [2018-09-23 19:39:27,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:39:27,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-23 19:39:27,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-23 19:39:27,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-23 19:39:27,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-23 19:39:27,429 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-09-23 19:39:27,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:27,429 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-23 19:39:27,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 19:39:27,429 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-23 19:39:27,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-23 19:39:27,430 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:27,430 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-09-23 19:39:27,430 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:27,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:27,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-09-23 19:39:27,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:27,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:27,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:27,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:27,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:27,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:28,249 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 19:39:28,250 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:28,250 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:28,257 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:39:28,290 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-23 19:39:28,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:28,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:28,311 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 19:39:28,340 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:28,340 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-23 19:39:28,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 19:39:28,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 19:39:28,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:39:28,342 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-09-23 19:39:28,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:28,448 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-23 19:39:28,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 19:39:28,449 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-23 19:39:28,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:28,450 INFO L225 Difference]: With dead ends: 91 [2018-09-23 19:39:28,450 INFO L226 Difference]: Without dead ends: 89 [2018-09-23 19:39:28,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:39:28,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-23 19:39:28,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-23 19:39:28,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-23 19:39:28,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-23 19:39:28,454 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-09-23 19:39:28,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:28,454 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-23 19:39:28,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 19:39:28,454 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-23 19:39:28,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-23 19:39:28,455 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:28,455 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-09-23 19:39:28,455 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:28,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:28,455 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-09-23 19:39:28,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:28,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:28,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:28,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:28,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:28,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:29,239 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:29,239 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:29,247 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:39:29,288 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-23 19:39:29,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:29,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:29,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:29,325 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:29,326 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-23 19:39:29,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 19:39:29,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 19:39:29,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:39:29,327 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-09-23 19:39:29,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:29,383 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-23 19:39:29,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 19:39:29,383 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-09-23 19:39:29,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:29,384 INFO L225 Difference]: With dead ends: 93 [2018-09-23 19:39:29,384 INFO L226 Difference]: Without dead ends: 91 [2018-09-23 19:39:29,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:39:29,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-23 19:39:29,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-23 19:39:29,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-23 19:39:29,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-23 19:39:29,388 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-09-23 19:39:29,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:29,389 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-23 19:39:29,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 19:39:29,389 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-23 19:39:29,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-23 19:39:29,389 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:29,389 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-09-23 19:39:29,390 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:29,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:29,390 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-09-23 19:39:29,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:29,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:29,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:29,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:29,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:29,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:31,310 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 19:39:31,310 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:31,310 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:31,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:31,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:31,359 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 19:39:31,380 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:31,381 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-23 19:39:31,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 19:39:31,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 19:39:31,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:39:31,382 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-09-23 19:39:31,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:31,498 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-23 19:39:31,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 19:39:31,499 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-23 19:39:31,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:31,499 INFO L225 Difference]: With dead ends: 95 [2018-09-23 19:39:31,499 INFO L226 Difference]: Without dead ends: 93 [2018-09-23 19:39:31,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:39:31,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-23 19:39:31,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-23 19:39:31,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-23 19:39:31,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-23 19:39:31,503 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-09-23 19:39:31,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:31,503 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-23 19:39:31,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 19:39:31,503 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-23 19:39:31,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-23 19:39:31,504 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:31,504 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-09-23 19:39:31,504 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:31,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:31,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-09-23 19:39:31,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:31,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:31,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:31,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:31,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:32,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:32,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:32,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:32,494 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:39:32,519 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:39:32,520 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:32,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:32,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:32,555 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:32,555 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-23 19:39:32,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 19:39:32,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 19:39:32,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:39:32,556 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-09-23 19:39:32,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:32,887 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-23 19:39:32,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 19:39:32,887 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-09-23 19:39:32,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:32,888 INFO L225 Difference]: With dead ends: 97 [2018-09-23 19:39:32,888 INFO L226 Difference]: Without dead ends: 95 [2018-09-23 19:39:32,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:39:32,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-23 19:39:32,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-23 19:39:32,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-23 19:39:32,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-23 19:39:32,892 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-09-23 19:39:32,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:32,893 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-23 19:39:32,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 19:39:32,893 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-23 19:39:32,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-23 19:39:32,893 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:32,893 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-09-23 19:39:32,893 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:32,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:32,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-09-23 19:39:32,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:32,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:32,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:32,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:32,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:33,867 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 19:39:33,868 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:33,868 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:33,878 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:39:33,925 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-23 19:39:33,925 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:33,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:33,946 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 19:39:33,974 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:33,975 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-23 19:39:33,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 19:39:33,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 19:39:33,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:39:33,976 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-09-23 19:39:34,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:34,236 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-23 19:39:34,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 19:39:34,237 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-23 19:39:34,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:34,238 INFO L225 Difference]: With dead ends: 99 [2018-09-23 19:39:34,238 INFO L226 Difference]: Without dead ends: 97 [2018-09-23 19:39:34,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:39:34,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-23 19:39:34,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-23 19:39:34,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-23 19:39:34,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-23 19:39:34,242 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-09-23 19:39:34,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:34,242 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-23 19:39:34,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 19:39:34,242 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-23 19:39:34,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-23 19:39:34,243 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:34,243 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-09-23 19:39:34,243 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:34,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:34,243 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-09-23 19:39:34,243 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:34,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:34,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:34,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:34,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:35,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:35,201 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:35,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:35,208 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:39:35,232 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:39:35,232 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:35,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:35,278 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:35,278 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-23 19:39:35,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 19:39:35,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 19:39:35,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:39:35,279 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-09-23 19:39:35,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:35,365 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-23 19:39:35,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 19:39:35,365 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-09-23 19:39:35,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:35,366 INFO L225 Difference]: With dead ends: 101 [2018-09-23 19:39:35,366 INFO L226 Difference]: Without dead ends: 99 [2018-09-23 19:39:35,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:39:35,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-23 19:39:35,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-23 19:39:35,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-23 19:39:35,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-23 19:39:35,370 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-09-23 19:39:35,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:35,371 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-23 19:39:35,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 19:39:35,371 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-23 19:39:35,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 19:39:35,372 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:35,372 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-09-23 19:39:35,372 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:35,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:35,372 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-09-23 19:39:35,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:35,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:35,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:35,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:35,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:36,457 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 19:39:36,457 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:36,457 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:36,464 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:39:36,544 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-23 19:39:36,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:36,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:36,564 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 19:39:36,585 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:36,585 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-23 19:39:36,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 19:39:36,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 19:39:36,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:39:36,586 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-09-23 19:39:36,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:36,716 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-23 19:39:36,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 19:39:36,717 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-23 19:39:36,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:36,717 INFO L225 Difference]: With dead ends: 103 [2018-09-23 19:39:36,717 INFO L226 Difference]: Without dead ends: 101 [2018-09-23 19:39:36,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:39:36,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-23 19:39:36,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-23 19:39:36,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-23 19:39:36,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-23 19:39:36,721 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-09-23 19:39:36,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:36,722 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-23 19:39:36,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 19:39:36,722 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-23 19:39:36,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-23 19:39:36,722 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:36,723 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-09-23 19:39:36,723 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:36,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:36,723 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-09-23 19:39:36,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:36,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:36,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:36,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:36,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:37,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:37,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:37,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:37,948 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:39:37,990 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-23 19:39:37,991 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:37,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:38,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:38,034 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:38,035 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-23 19:39:38,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 19:39:38,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 19:39:38,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:39:38,036 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-09-23 19:39:38,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:38,157 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-23 19:39:38,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 19:39:38,157 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-09-23 19:39:38,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:38,159 INFO L225 Difference]: With dead ends: 105 [2018-09-23 19:39:38,159 INFO L226 Difference]: Without dead ends: 103 [2018-09-23 19:39:38,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:39:38,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-23 19:39:38,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-23 19:39:38,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-23 19:39:38,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-23 19:39:38,163 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-09-23 19:39:38,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:38,163 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-23 19:39:38,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 19:39:38,163 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-23 19:39:38,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-23 19:39:38,164 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:38,164 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-09-23 19:39:38,164 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:38,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:38,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-09-23 19:39:38,165 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:38,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:38,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:38,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:38,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:38,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:39,444 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 19:39:39,445 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:39,445 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:39,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:39,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:39,497 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 19:39:39,517 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:39,517 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-23 19:39:39,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 19:39:39,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 19:39:39,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:39:39,518 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-09-23 19:39:39,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:39,628 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-23 19:39:39,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 19:39:39,629 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-23 19:39:39,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:39,630 INFO L225 Difference]: With dead ends: 107 [2018-09-23 19:39:39,630 INFO L226 Difference]: Without dead ends: 105 [2018-09-23 19:39:39,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:39:39,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-23 19:39:39,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-23 19:39:39,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-23 19:39:39,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-23 19:39:39,634 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-09-23 19:39:39,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:39,634 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-23 19:39:39,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 19:39:39,635 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-23 19:39:39,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-23 19:39:39,635 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:39,635 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-09-23 19:39:39,636 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:39,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:39,636 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-09-23 19:39:39,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:39,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:39,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:39,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:39,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:39,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:41,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:41,086 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:41,087 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:41,096 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:39:41,146 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:39:41,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:41,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:41,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:41,210 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:41,210 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-23 19:39:41,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 19:39:41,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 19:39:41,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:39:41,212 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-09-23 19:39:41,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:41,533 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-23 19:39:41,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 19:39:41,534 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-09-23 19:39:41,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:41,535 INFO L225 Difference]: With dead ends: 109 [2018-09-23 19:39:41,536 INFO L226 Difference]: Without dead ends: 107 [2018-09-23 19:39:41,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:39:41,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-23 19:39:41,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-23 19:39:41,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-23 19:39:41,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-23 19:39:41,539 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-09-23 19:39:41,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:41,540 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-23 19:39:41,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 19:39:41,540 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-23 19:39:41,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-23 19:39:41,541 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:41,541 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-09-23 19:39:41,541 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:41,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:41,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-09-23 19:39:41,541 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:41,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:41,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:41,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:41,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:43,011 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 19:39:43,011 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:43,011 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:43,018 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:39:43,067 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-23 19:39:43,067 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:43,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:43,089 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 19:39:43,119 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:43,120 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-23 19:39:43,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 19:39:43,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 19:39:43,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:39:43,121 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-09-23 19:39:43,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:43,311 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-23 19:39:43,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 19:39:43,311 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-23 19:39:43,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:43,312 INFO L225 Difference]: With dead ends: 111 [2018-09-23 19:39:43,312 INFO L226 Difference]: Without dead ends: 109 [2018-09-23 19:39:43,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:39:43,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-23 19:39:43,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-23 19:39:43,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-23 19:39:43,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-23 19:39:43,316 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-09-23 19:39:43,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:43,317 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-23 19:39:43,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 19:39:43,317 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-23 19:39:43,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-23 19:39:43,318 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:43,318 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-09-23 19:39:43,318 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:43,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:43,318 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-09-23 19:39:43,318 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:43,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:43,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:43,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:43,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:43,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:44,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:44,875 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:44,875 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:44,891 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:39:44,939 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:39:44,940 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:44,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:44,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:44,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:44,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-23 19:39:44,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 19:39:44,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 19:39:44,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:39:44,996 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-09-23 19:39:45,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:45,116 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-23 19:39:45,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 19:39:45,116 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-09-23 19:39:45,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:45,117 INFO L225 Difference]: With dead ends: 113 [2018-09-23 19:39:45,117 INFO L226 Difference]: Without dead ends: 111 [2018-09-23 19:39:45,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:39:45,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-23 19:39:45,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-23 19:39:45,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-23 19:39:45,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-23 19:39:45,122 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-09-23 19:39:45,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:45,122 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-23 19:39:45,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 19:39:45,122 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-23 19:39:45,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-23 19:39:45,123 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:45,123 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-09-23 19:39:45,123 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:45,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:45,124 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-09-23 19:39:45,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:45,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:45,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:45,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:45,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:45,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:46,323 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 19:39:46,323 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:46,323 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:46,331 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:39:46,382 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-23 19:39:46,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:46,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:46,403 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 19:39:46,431 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:46,432 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-23 19:39:46,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 19:39:46,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 19:39:46,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:39:46,433 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-09-23 19:39:46,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:46,566 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-23 19:39:46,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 19:39:46,566 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-23 19:39:46,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:46,567 INFO L225 Difference]: With dead ends: 115 [2018-09-23 19:39:46,567 INFO L226 Difference]: Without dead ends: 113 [2018-09-23 19:39:46,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:39:46,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-23 19:39:46,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-23 19:39:46,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-23 19:39:46,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-23 19:39:46,572 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-09-23 19:39:46,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:46,572 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-23 19:39:46,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 19:39:46,572 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-23 19:39:46,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-23 19:39:46,573 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:46,573 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-09-23 19:39:46,573 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:46,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:46,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-09-23 19:39:46,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:46,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:46,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:46,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:46,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:48,060 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:48,060 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:48,068 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:39:48,117 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-23 19:39:48,118 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:48,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:48,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:48,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:48,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-23 19:39:48,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 19:39:48,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 19:39:48,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:39:48,159 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-09-23 19:39:49,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:49,084 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-23 19:39:49,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 19:39:49,084 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-09-23 19:39:49,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:49,085 INFO L225 Difference]: With dead ends: 117 [2018-09-23 19:39:49,085 INFO L226 Difference]: Without dead ends: 115 [2018-09-23 19:39:49,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:39:49,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-23 19:39:49,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-23 19:39:49,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-23 19:39:49,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-23 19:39:49,089 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-09-23 19:39:49,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:49,089 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-23 19:39:49,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 19:39:49,089 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-23 19:39:49,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-23 19:39:49,090 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:49,090 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-09-23 19:39:49,090 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:49,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:49,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-09-23 19:39:49,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:49,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:49,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:49,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:49,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:52,681 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 19:39:52,681 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:52,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:52,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:52,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:52,743 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 19:39:52,778 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:52,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-23 19:39:52,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 19:39:52,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 19:39:52,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:39:52,780 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-09-23 19:39:53,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:53,171 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-23 19:39:53,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 19:39:53,171 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-23 19:39:53,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:53,173 INFO L225 Difference]: With dead ends: 119 [2018-09-23 19:39:53,173 INFO L226 Difference]: Without dead ends: 117 [2018-09-23 19:39:53,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:39:53,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-23 19:39:53,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-23 19:39:53,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-23 19:39:53,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-23 19:39:53,178 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-09-23 19:39:53,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:53,178 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-23 19:39:53,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 19:39:53,179 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-23 19:39:53,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-23 19:39:53,179 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:53,179 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-09-23 19:39:53,180 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:53,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:53,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-09-23 19:39:53,180 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:53,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:53,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:53,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:53,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:53,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:54,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:54,590 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:54,590 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:54,598 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:39:54,628 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:39:54,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:54,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:54,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:54,683 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:54,684 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-23 19:39:54,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 19:39:54,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 19:39:54,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:39:54,685 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-09-23 19:39:55,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:55,030 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-23 19:39:55,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 19:39:55,031 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-09-23 19:39:55,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:55,031 INFO L225 Difference]: With dead ends: 121 [2018-09-23 19:39:55,032 INFO L226 Difference]: Without dead ends: 119 [2018-09-23 19:39:55,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:39:55,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-23 19:39:55,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-23 19:39:55,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-23 19:39:55,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-23 19:39:55,037 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-09-23 19:39:55,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:55,037 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-23 19:39:55,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 19:39:55,037 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-23 19:39:55,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-23 19:39:55,038 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:55,038 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-09-23 19:39:55,038 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:55,038 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:55,038 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-09-23 19:39:55,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:55,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:55,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:55,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:55,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:55,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:56,786 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 19:39:56,786 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:56,786 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:56,794 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:39:56,851 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-23 19:39:56,851 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:56,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:56,880 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 19:39:56,911 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:56,911 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-23 19:39:56,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 19:39:56,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 19:39:56,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:39:56,912 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-09-23 19:39:57,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:57,219 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-23 19:39:57,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 19:39:57,220 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-09-23 19:39:57,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:57,220 INFO L225 Difference]: With dead ends: 123 [2018-09-23 19:39:57,220 INFO L226 Difference]: Without dead ends: 121 [2018-09-23 19:39:57,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:39:57,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-23 19:39:57,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-23 19:39:57,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-23 19:39:57,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-09-23 19:39:57,224 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-09-23 19:39:57,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:57,224 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-09-23 19:39:57,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 19:39:57,224 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-09-23 19:39:57,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-23 19:39:57,225 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:57,225 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-09-23 19:39:57,225 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:57,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:57,225 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-09-23 19:39:57,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:57,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:57,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:57,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:57,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:57,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:00,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:00,779 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:00,779 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:00,788 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:40:00,820 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:40:00,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:00,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:00,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:00,880 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:00,880 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-23 19:40:00,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-23 19:40:00,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-23 19:40:00,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:40:00,881 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-09-23 19:40:02,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:02,115 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-23 19:40:02,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 19:40:02,116 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-09-23 19:40:02,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:02,117 INFO L225 Difference]: With dead ends: 125 [2018-09-23 19:40:02,117 INFO L226 Difference]: Without dead ends: 123 [2018-09-23 19:40:02,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:40:02,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-23 19:40:02,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-23 19:40:02,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-23 19:40:02,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-23 19:40:02,120 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-09-23 19:40:02,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:02,121 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-23 19:40:02,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-23 19:40:02,121 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-23 19:40:02,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-23 19:40:02,122 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:02,122 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-09-23 19:40:02,122 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:02,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:02,122 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-09-23 19:40:02,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:02,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:02,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:02,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:02,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:03,703 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 19:40:03,703 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:03,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:03,711 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:40:03,762 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-23 19:40:03,763 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:03,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:03,793 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 19:40:03,822 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:03,822 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-23 19:40:03,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 19:40:03,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 19:40:03,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:40:03,823 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-09-23 19:40:03,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:03,973 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-23 19:40:03,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 19:40:03,973 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-09-23 19:40:03,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:03,974 INFO L225 Difference]: With dead ends: 127 [2018-09-23 19:40:03,974 INFO L226 Difference]: Without dead ends: 125 [2018-09-23 19:40:03,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:40:03,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-23 19:40:03,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-23 19:40:03,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-23 19:40:03,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-09-23 19:40:03,977 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-09-23 19:40:03,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:03,978 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-09-23 19:40:03,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 19:40:03,978 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-09-23 19:40:03,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-23 19:40:03,978 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:03,979 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-09-23 19:40:03,979 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:03,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:03,979 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-09-23 19:40:03,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:03,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:03,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:03,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:03,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:03,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:05,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:05,500 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:05,500 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:05,508 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:40:05,563 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-23 19:40:05,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:05,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:05,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:05,621 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:05,621 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-23 19:40:05,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-23 19:40:05,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-23 19:40:05,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:40:05,622 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-09-23 19:40:05,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:05,725 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-23 19:40:05,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 19:40:05,725 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-09-23 19:40:05,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:05,726 INFO L225 Difference]: With dead ends: 129 [2018-09-23 19:40:05,727 INFO L226 Difference]: Without dead ends: 127 [2018-09-23 19:40:05,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:40:05,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-23 19:40:05,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-23 19:40:05,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-23 19:40:05,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-23 19:40:05,731 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-09-23 19:40:05,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:05,731 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-23 19:40:05,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-23 19:40:05,731 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-23 19:40:05,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-23 19:40:05,732 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:05,732 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-09-23 19:40:05,732 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:05,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:05,733 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-09-23 19:40:05,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:05,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:05,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:05,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:05,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:09,386 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 19:40:09,386 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:09,386 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:09,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:40:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:09,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:09,455 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 19:40:09,483 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:09,483 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-23 19:40:09,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 19:40:09,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 19:40:09,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:40:09,484 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-09-23 19:40:09,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:09,652 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-23 19:40:09,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 19:40:09,652 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-09-23 19:40:09,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:09,653 INFO L225 Difference]: With dead ends: 131 [2018-09-23 19:40:09,653 INFO L226 Difference]: Without dead ends: 129 [2018-09-23 19:40:09,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:40:09,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-23 19:40:09,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-23 19:40:09,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-23 19:40:09,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-09-23 19:40:09,655 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-09-23 19:40:09,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:09,656 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-09-23 19:40:09,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 19:40:09,656 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-09-23 19:40:09,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-23 19:40:09,656 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:09,656 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-09-23 19:40:09,657 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:09,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:09,657 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-09-23 19:40:09,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:09,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:09,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:09,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:40:09,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:09,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:11,871 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:11,871 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:11,881 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:40:11,912 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:40:11,912 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:11,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:11,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:11,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:11,954 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-23 19:40:11,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 19:40:11,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 19:40:11,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:40:11,956 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-09-23 19:40:12,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:12,056 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-23 19:40:12,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 19:40:12,056 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-09-23 19:40:12,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:12,057 INFO L225 Difference]: With dead ends: 133 [2018-09-23 19:40:12,057 INFO L226 Difference]: Without dead ends: 131 [2018-09-23 19:40:12,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:40:12,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-23 19:40:12,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-23 19:40:12,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-23 19:40:12,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-23 19:40:12,061 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-09-23 19:40:12,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:12,061 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-23 19:40:12,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 19:40:12,061 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-23 19:40:12,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-23 19:40:12,062 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:12,062 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-09-23 19:40:12,062 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:12,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:12,062 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-09-23 19:40:12,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:12,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:12,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:12,063 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:12,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:12,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:13,898 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 19:40:13,899 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:13,899 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:13,910 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:40:13,987 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-23 19:40:13,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:13,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:14,018 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 19:40:14,047 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:14,047 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-23 19:40:14,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 19:40:14,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 19:40:14,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:40:14,049 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-09-23 19:40:14,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:14,878 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-23 19:40:14,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 19:40:14,879 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-09-23 19:40:14,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:14,880 INFO L225 Difference]: With dead ends: 135 [2018-09-23 19:40:14,880 INFO L226 Difference]: Without dead ends: 133 [2018-09-23 19:40:14,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:40:14,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-23 19:40:14,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-23 19:40:14,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-23 19:40:14,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-09-23 19:40:14,884 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-09-23 19:40:14,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:14,884 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-09-23 19:40:14,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 19:40:14,884 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-09-23 19:40:14,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-23 19:40:14,885 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:14,885 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-09-23 19:40:14,886 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:14,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:14,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-09-23 19:40:14,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:14,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:14,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:14,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:14,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:14,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:16,417 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:16,417 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:16,426 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:40:16,456 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:40:16,456 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:16,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:16,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:16,498 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:16,498 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-23 19:40:16,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-23 19:40:16,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-23 19:40:16,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:40:16,500 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-09-23 19:40:16,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:16,607 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-23 19:40:16,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 19:40:16,607 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-09-23 19:40:16,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:16,608 INFO L225 Difference]: With dead ends: 137 [2018-09-23 19:40:16,608 INFO L226 Difference]: Without dead ends: 135 [2018-09-23 19:40:16,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:40:16,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-23 19:40:16,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-23 19:40:16,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-23 19:40:16,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-23 19:40:16,613 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-09-23 19:40:16,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:16,613 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-23 19:40:16,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-23 19:40:16,613 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-23 19:40:16,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-23 19:40:16,614 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:16,614 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-09-23 19:40:16,614 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:16,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:16,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-09-23 19:40:16,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:16,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:16,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:16,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:16,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:16,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:18,638 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 19:40:18,638 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:18,638 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:18,645 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:40:18,705 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-23 19:40:18,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:18,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:18,738 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 19:40:18,768 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:18,768 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-23 19:40:18,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 19:40:18,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 19:40:18,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:40:18,770 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-09-23 19:40:18,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:18,907 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-23 19:40:18,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 19:40:18,907 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-09-23 19:40:18,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:18,908 INFO L225 Difference]: With dead ends: 139 [2018-09-23 19:40:18,908 INFO L226 Difference]: Without dead ends: 137 [2018-09-23 19:40:18,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:40:18,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-23 19:40:18,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-23 19:40:18,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-23 19:40:18,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-09-23 19:40:18,913 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-09-23 19:40:18,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:18,913 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-09-23 19:40:18,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 19:40:18,913 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-09-23 19:40:18,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-23 19:40:18,914 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:18,914 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-09-23 19:40:18,914 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:18,914 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:18,914 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-09-23 19:40:18,914 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:18,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:18,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:18,915 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:18,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:18,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:20,598 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:20,598 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:20,605 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:40:20,672 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-23 19:40:20,672 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:20,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:20,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:20,734 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:20,734 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-23 19:40:20,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-23 19:40:20,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-23 19:40:20,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 19:40:20,736 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-09-23 19:40:20,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:20,994 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-23 19:40:20,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 19:40:20,994 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-09-23 19:40:20,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:20,995 INFO L225 Difference]: With dead ends: 141 [2018-09-23 19:40:20,995 INFO L226 Difference]: Without dead ends: 139 [2018-09-23 19:40:20,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 19:40:20,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-23 19:40:20,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-23 19:40:20,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-23 19:40:20,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-23 19:40:20,999 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-09-23 19:40:20,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:20,999 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-23 19:40:21,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-23 19:40:21,000 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-23 19:40:21,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-23 19:40:21,000 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:21,000 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-09-23 19:40:21,000 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:21,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:21,001 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-09-23 19:40:21,001 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:21,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:21,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:21,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:21,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:21,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:22,801 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 19:40:22,802 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:22,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:22,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:40:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:22,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:22,868 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 19:40:22,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:22,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-23 19:40:22,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 19:40:22,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 19:40:22,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:40:22,890 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-09-23 19:40:23,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:23,003 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-23 19:40:23,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 19:40:23,003 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-09-23 19:40:23,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:23,004 INFO L225 Difference]: With dead ends: 143 [2018-09-23 19:40:23,004 INFO L226 Difference]: Without dead ends: 141 [2018-09-23 19:40:23,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:40:23,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-23 19:40:23,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-23 19:40:23,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-23 19:40:23,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-09-23 19:40:23,007 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-09-23 19:40:23,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:23,007 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-09-23 19:40:23,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 19:40:23,007 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-09-23 19:40:23,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-23 19:40:23,007 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:23,008 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-09-23 19:40:23,008 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:23,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:23,008 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-09-23 19:40:23,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:23,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:23,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:23,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:40:23,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:23,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:24,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:24,830 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:24,830 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:24,837 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:40:24,876 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:40:24,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:24,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:24,920 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:24,920 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-23 19:40:24,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-23 19:40:24,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-23 19:40:24,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:40:24,921 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-09-23 19:40:25,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:25,036 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-23 19:40:25,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 19:40:25,036 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-09-23 19:40:25,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:25,037 INFO L225 Difference]: With dead ends: 145 [2018-09-23 19:40:25,037 INFO L226 Difference]: Without dead ends: 143 [2018-09-23 19:40:25,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:40:25,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-23 19:40:25,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-23 19:40:25,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-23 19:40:25,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-23 19:40:25,041 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-09-23 19:40:25,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:25,041 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-23 19:40:25,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-23 19:40:25,042 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-23 19:40:25,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-23 19:40:25,042 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:25,042 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-09-23 19:40:25,043 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:25,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:25,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-09-23 19:40:25,043 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:25,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:25,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:25,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:25,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:26,865 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 19:40:26,866 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:26,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:26,872 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:40:26,976 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-23 19:40:26,977 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:26,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:27,011 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 19:40:27,041 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:27,041 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-23 19:40:27,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 19:40:27,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 19:40:27,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:40:27,043 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-09-23 19:40:27,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:27,393 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-23 19:40:27,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-23 19:40:27,393 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-09-23 19:40:27,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:27,394 INFO L225 Difference]: With dead ends: 147 [2018-09-23 19:40:27,394 INFO L226 Difference]: Without dead ends: 145 [2018-09-23 19:40:27,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:40:27,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-23 19:40:27,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-23 19:40:27,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-23 19:40:27,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-09-23 19:40:27,397 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-09-23 19:40:27,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:27,397 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-09-23 19:40:27,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 19:40:27,397 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-09-23 19:40:27,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-23 19:40:27,398 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:27,398 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-09-23 19:40:27,398 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:27,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:27,399 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-09-23 19:40:27,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:27,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:27,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:27,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:27,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:29,581 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:29,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:29,589 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:40:29,628 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:40:29,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:29,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:29,694 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:29,695 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-23 19:40:29,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-23 19:40:29,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-23 19:40:29,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 19:40:29,696 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-09-23 19:40:29,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:29,883 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-23 19:40:29,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-23 19:40:29,883 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-09-23 19:40:29,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:29,884 INFO L225 Difference]: With dead ends: 149 [2018-09-23 19:40:29,884 INFO L226 Difference]: Without dead ends: 147 [2018-09-23 19:40:29,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 19:40:29,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-23 19:40:29,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-23 19:40:29,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-23 19:40:29,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-23 19:40:29,888 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-09-23 19:40:29,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:29,888 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-23 19:40:29,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-23 19:40:29,888 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-23 19:40:29,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-23 19:40:29,889 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:29,889 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-09-23 19:40:29,889 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:29,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:29,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-09-23 19:40:29,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:29,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:29,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:29,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:29,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:29,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:31,848 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 19:40:31,848 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:31,848 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:31,856 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:40:32,310 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-23 19:40:32,310 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:32,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:32,349 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 19:40:32,380 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:32,380 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-23 19:40:32,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-23 19:40:32,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-23 19:40:32,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:40:32,382 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-09-23 19:40:32,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:32,561 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-23 19:40:32,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-23 19:40:32,561 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-09-23 19:40:32,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:32,564 INFO L225 Difference]: With dead ends: 151 [2018-09-23 19:40:32,564 INFO L226 Difference]: Without dead ends: 149 [2018-09-23 19:40:32,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:40:32,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-23 19:40:32,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-23 19:40:32,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-23 19:40:32,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-09-23 19:40:32,568 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-09-23 19:40:32,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:32,568 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-09-23 19:40:32,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-23 19:40:32,568 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-09-23 19:40:32,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-23 19:40:32,569 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:32,569 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-09-23 19:40:32,570 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:32,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:32,570 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-09-23 19:40:32,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:32,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:32,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:32,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:32,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:32,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:34,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:34,839 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:34,839 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:34,846 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:40:34,917 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-23 19:40:34,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:34,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:34,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:34,965 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:34,965 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-23 19:40:34,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-23 19:40:34,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-23 19:40:34,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 19:40:34,966 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-09-23 19:40:35,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:35,097 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-23 19:40:35,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-23 19:40:35,097 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-09-23 19:40:35,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:35,098 INFO L225 Difference]: With dead ends: 153 [2018-09-23 19:40:35,098 INFO L226 Difference]: Without dead ends: 151 [2018-09-23 19:40:35,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 19:40:35,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-23 19:40:35,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-23 19:40:35,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-23 19:40:35,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-23 19:40:35,102 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-09-23 19:40:35,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:35,103 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-23 19:40:35,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-23 19:40:35,103 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-23 19:40:35,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-23 19:40:35,103 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:35,104 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-09-23 19:40:35,104 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:35,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:35,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-09-23 19:40:35,104 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:35,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:35,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:35,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:35,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:37,161 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 19:40:37,161 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:37,161 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:37,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:40:37,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:37,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:37,253 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 19:40:37,276 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:37,276 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-23 19:40:37,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-23 19:40:37,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-23 19:40:37,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 19:40:37,277 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-09-23 19:40:37,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:37,482 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-23 19:40:37,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-23 19:40:37,482 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-09-23 19:40:37,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:37,483 INFO L225 Difference]: With dead ends: 155 [2018-09-23 19:40:37,483 INFO L226 Difference]: Without dead ends: 153 [2018-09-23 19:40:37,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 19:40:37,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-23 19:40:37,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-23 19:40:37,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-23 19:40:37,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-09-23 19:40:37,486 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-09-23 19:40:37,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:37,487 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-09-23 19:40:37,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-23 19:40:37,487 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-09-23 19:40:37,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-23 19:40:37,487 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:37,487 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-09-23 19:40:37,488 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:37,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:37,488 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-09-23 19:40:37,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:37,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:37,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:37,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:40:37,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:37,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:39,991 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:39,991 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:39,998 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:40:40,037 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:40:40,037 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:40,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:40,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:40,094 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:40,094 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-23 19:40:40,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-23 19:40:40,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-23 19:40:40,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 19:40:40,096 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2018-09-23 19:40:40,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:40,306 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-23 19:40:40,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 19:40:40,306 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-09-23 19:40:40,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:40,307 INFO L225 Difference]: With dead ends: 157 [2018-09-23 19:40:40,307 INFO L226 Difference]: Without dead ends: 155 [2018-09-23 19:40:40,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 19:40:40,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-23 19:40:40,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-23 19:40:40,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-23 19:40:40,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-09-23 19:40:40,310 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2018-09-23 19:40:40,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:40,310 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-09-23 19:40:40,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-23 19:40:40,310 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-09-23 19:40:40,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-23 19:40:40,311 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:40,311 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-09-23 19:40:40,311 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:40,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:40,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 75 times [2018-09-23 19:40:40,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:40,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:40,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:40,312 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:40,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:42,657 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 19:40:42,657 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:42,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:42,664 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:40:42,748 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-23 19:40:42,748 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:42,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:42,777 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 19:40:42,797 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:42,797 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-23 19:40:42,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-23 19:40:42,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-23 19:40:42,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:40:42,799 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2018-09-23 19:40:43,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:43,012 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-23 19:40:43,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-23 19:40:43,012 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-09-23 19:40:43,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:43,013 INFO L225 Difference]: With dead ends: 159 [2018-09-23 19:40:43,013 INFO L226 Difference]: Without dead ends: 157 [2018-09-23 19:40:43,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:40:43,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-23 19:40:43,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-23 19:40:43,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-23 19:40:43,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-09-23 19:40:43,016 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2018-09-23 19:40:43,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:43,017 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-09-23 19:40:43,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-23 19:40:43,017 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-09-23 19:40:43,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-23 19:40:43,017 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:43,017 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1] [2018-09-23 19:40:43,018 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:43,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:43,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1961675265, now seen corresponding path program 76 times [2018-09-23 19:40:43,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:43,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:43,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:43,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:43,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:43,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:45,447 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:45,447 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:45,454 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:40:45,494 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:40:45,494 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:45,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:45,547 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:45,547 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-23 19:40:45,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-23 19:40:45,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-23 19:40:45,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 19:40:45,549 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2018-09-23 19:40:45,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:45,770 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-23 19:40:45,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-23 19:40:45,770 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-09-23 19:40:45,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:45,771 INFO L225 Difference]: With dead ends: 161 [2018-09-23 19:40:45,771 INFO L226 Difference]: Without dead ends: 159 [2018-09-23 19:40:45,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 19:40:45,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-23 19:40:45,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-23 19:40:45,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-23 19:40:45,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-09-23 19:40:45,774 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2018-09-23 19:40:45,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:45,774 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-09-23 19:40:45,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-23 19:40:45,775 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-09-23 19:40:45,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-23 19:40:45,775 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:45,775 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-09-23 19:40:45,775 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:45,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:45,776 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 77 times [2018-09-23 19:40:45,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:45,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:45,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:45,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:45,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:48,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:48,005 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:48,005 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:48,014 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:40:48,087 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-23 19:40:48,087 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:48,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:48,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:48,144 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:48,144 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-23 19:40:48,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-23 19:40:48,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-23 19:40:48,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 19:40:48,146 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2018-09-23 19:40:48,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:48,662 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-23 19:40:48,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-23 19:40:48,663 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-09-23 19:40:48,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:48,664 INFO L225 Difference]: With dead ends: 163 [2018-09-23 19:40:48,664 INFO L226 Difference]: Without dead ends: 161 [2018-09-23 19:40:48,664 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 19:40:48,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-23 19:40:48,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-23 19:40:48,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-23 19:40:48,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-09-23 19:40:48,668 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2018-09-23 19:40:48,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:48,668 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-09-23 19:40:48,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-23 19:40:48,669 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-09-23 19:40:48,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-23 19:40:48,669 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:48,670 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1] [2018-09-23 19:40:48,670 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:48,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:48,670 INFO L82 PathProgramCache]: Analyzing trace with hash -982073613, now seen corresponding path program 78 times [2018-09-23 19:40:48,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:48,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:48,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:48,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:48,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:48,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:51,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:51,910 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:51,910 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:51,916 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:40:52,037 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-23 19:40:52,037 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:52,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:52,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:52,096 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:52,097 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-23 19:40:52,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-23 19:40:52,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-23 19:40:52,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 19:40:52,098 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2018-09-23 19:40:52,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:52,270 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-23 19:40:52,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-23 19:40:52,270 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-09-23 19:40:52,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:52,271 INFO L225 Difference]: With dead ends: 165 [2018-09-23 19:40:52,271 INFO L226 Difference]: Without dead ends: 163 [2018-09-23 19:40:52,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 19:40:52,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-23 19:40:52,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-23 19:40:52,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-23 19:40:52,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-09-23 19:40:52,276 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2018-09-23 19:40:52,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:52,276 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-09-23 19:40:52,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-23 19:40:52,276 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-09-23 19:40:52,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-23 19:40:52,277 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:52,277 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-09-23 19:40:52,277 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:52,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:52,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 79 times [2018-09-23 19:40:52,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:52,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:52,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:52,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:52,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:52,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:54,964 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:54,964 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:54,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:40:55,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:55,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:55,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:55,061 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:55,062 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-23 19:40:55,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-23 19:40:55,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-23 19:40:55,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 19:40:55,063 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2018-09-23 19:40:55,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:55,287 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-09-23 19:40:55,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-23 19:40:55,288 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-09-23 19:40:55,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:55,288 INFO L225 Difference]: With dead ends: 167 [2018-09-23 19:40:55,288 INFO L226 Difference]: Without dead ends: 165 [2018-09-23 19:40:55,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 19:40:55,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-23 19:40:55,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-23 19:40:55,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-23 19:40:55,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-09-23 19:40:55,292 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2018-09-23 19:40:55,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:55,292 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-09-23 19:40:55,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-23 19:40:55,293 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-09-23 19:40:55,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-23 19:40:55,293 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:55,294 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1] [2018-09-23 19:40:55,294 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:55,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:55,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1606111769, now seen corresponding path program 80 times [2018-09-23 19:40:55,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:55,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:55,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:55,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:40:55,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:57,657 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:57,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:57,663 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:40:57,705 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:40:57,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:57,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:57,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:57,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-23 19:40:57,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-23 19:40:57,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-23 19:40:57,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 19:40:57,761 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2018-09-23 19:40:57,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:57,923 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-09-23 19:40:57,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-23 19:40:57,923 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-09-23 19:40:57,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:57,925 INFO L225 Difference]: With dead ends: 169 [2018-09-23 19:40:57,925 INFO L226 Difference]: Without dead ends: 167 [2018-09-23 19:40:57,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 19:40:57,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-23 19:40:57,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-23 19:40:57,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-23 19:40:57,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-09-23 19:40:57,938 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2018-09-23 19:40:57,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:57,938 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-09-23 19:40:57,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-23 19:40:57,939 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-09-23 19:40:57,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-23 19:40:57,939 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:57,939 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-09-23 19:40:57,940 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:57,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:57,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 81 times [2018-09-23 19:40:57,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:57,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:57,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:57,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:57,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:57,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:00,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:00,698 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:00,699 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:00,706 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:41:00,797 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-09-23 19:41:00,797 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:00,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:00,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:00,848 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:00,849 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-23 19:41:00,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-23 19:41:00,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-23 19:41:00,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 19:41:00,850 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2018-09-23 19:41:01,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:01,020 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-09-23 19:41:01,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-23 19:41:01,021 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-09-23 19:41:01,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:01,022 INFO L225 Difference]: With dead ends: 171 [2018-09-23 19:41:01,022 INFO L226 Difference]: Without dead ends: 169 [2018-09-23 19:41:01,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 19:41:01,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-23 19:41:01,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-23 19:41:01,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-23 19:41:01,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-09-23 19:41:01,026 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2018-09-23 19:41:01,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:01,026 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-09-23 19:41:01,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-23 19:41:01,026 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-09-23 19:41:01,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-23 19:41:01,027 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:01,027 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1] [2018-09-23 19:41:01,027 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:01,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:01,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1943667419, now seen corresponding path program 82 times [2018-09-23 19:41:01,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:01,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:01,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:01,028 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:01,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:03,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:03,459 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:03,459 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:03,468 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:41:03,509 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:41:03,509 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:03,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:03,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:03,585 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:03,585 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-23 19:41:03,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-23 19:41:03,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-23 19:41:03,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 19:41:03,587 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2018-09-23 19:41:03,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:03,981 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-09-23 19:41:03,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-23 19:41:03,981 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-09-23 19:41:03,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:03,982 INFO L225 Difference]: With dead ends: 173 [2018-09-23 19:41:03,982 INFO L226 Difference]: Without dead ends: 171 [2018-09-23 19:41:03,983 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 19:41:03,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-23 19:41:03,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-23 19:41:03,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-23 19:41:03,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-09-23 19:41:03,986 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2018-09-23 19:41:03,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:03,986 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-09-23 19:41:03,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-23 19:41:03,986 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-09-23 19:41:03,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-23 19:41:03,986 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:03,987 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-09-23 19:41:03,987 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:03,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:03,987 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 83 times [2018-09-23 19:41:03,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:03,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:03,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:03,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:03,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:04,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:06,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:06,461 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:06,461 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:06,469 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:41:06,552 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-09-23 19:41:06,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:06,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:06,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:06,613 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:06,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-23 19:41:06,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-23 19:41:06,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-23 19:41:06,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 19:41:06,614 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2018-09-23 19:41:06,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:06,885 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-09-23 19:41:06,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-23 19:41:06,885 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-09-23 19:41:06,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:06,886 INFO L225 Difference]: With dead ends: 175 [2018-09-23 19:41:06,886 INFO L226 Difference]: Without dead ends: 173 [2018-09-23 19:41:06,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 19:41:06,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-23 19:41:06,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-23 19:41:06,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-23 19:41:06,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-09-23 19:41:06,891 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2018-09-23 19:41:06,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:06,891 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-09-23 19:41:06,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-23 19:41:06,891 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-09-23 19:41:06,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-23 19:41:06,892 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:06,892 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1] [2018-09-23 19:41:06,892 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:06,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:06,892 INFO L82 PathProgramCache]: Analyzing trace with hash 571719119, now seen corresponding path program 84 times [2018-09-23 19:41:06,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:06,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:06,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:06,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:06,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:06,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:09,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:09,795 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:09,795 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:09,802 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:41:09,898 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-09-23 19:41:09,898 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:09,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:09,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:09,954 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-23 19:41:09,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-23 19:41:09,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-23 19:41:09,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 19:41:09,955 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2018-09-23 19:41:10,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:10,391 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-09-23 19:41:10,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-23 19:41:10,391 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-09-23 19:41:10,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:10,392 INFO L225 Difference]: With dead ends: 177 [2018-09-23 19:41:10,392 INFO L226 Difference]: Without dead ends: 175 [2018-09-23 19:41:10,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 19:41:10,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-23 19:41:10,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-23 19:41:10,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-23 19:41:10,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-09-23 19:41:10,396 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2018-09-23 19:41:10,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:10,396 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-09-23 19:41:10,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-23 19:41:10,396 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-09-23 19:41:10,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-23 19:41:10,397 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:10,397 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-09-23 19:41:10,397 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:10,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:10,399 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 85 times [2018-09-23 19:41:10,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:10,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:10,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:10,400 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:10,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:13,055 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:13,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:13,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:13,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:41:13,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:13,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:13,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:13,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:13,161 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-23 19:41:13,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-23 19:41:13,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-23 19:41:13,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 19:41:13,163 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2018-09-23 19:41:13,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:13,421 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-09-23 19:41:13,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-23 19:41:13,421 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-09-23 19:41:13,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:13,422 INFO L225 Difference]: With dead ends: 179 [2018-09-23 19:41:13,422 INFO L226 Difference]: Without dead ends: 177 [2018-09-23 19:41:13,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 19:41:13,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-23 19:41:13,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-09-23 19:41:13,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-23 19:41:13,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-09-23 19:41:13,426 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2018-09-23 19:41:13,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:13,426 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-09-23 19:41:13,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-23 19:41:13,426 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-09-23 19:41:13,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-23 19:41:13,427 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:13,427 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1] [2018-09-23 19:41:13,428 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:13,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:13,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1448009411, now seen corresponding path program 86 times [2018-09-23 19:41:13,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:13,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:13,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:13,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:41:13,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:13,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:16,414 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:16,414 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:16,421 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:41:16,467 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:41:16,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:16,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:16,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:16,539 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:16,539 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-23 19:41:16,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-23 19:41:16,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-23 19:41:16,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 19:41:16,541 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2018-09-23 19:41:16,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:16,723 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-09-23 19:41:16,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-23 19:41:16,723 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-09-23 19:41:16,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:16,725 INFO L225 Difference]: With dead ends: 181 [2018-09-23 19:41:16,725 INFO L226 Difference]: Without dead ends: 179 [2018-09-23 19:41:16,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 19:41:16,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-23 19:41:16,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-23 19:41:16,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-23 19:41:16,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-09-23 19:41:16,729 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2018-09-23 19:41:16,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:16,729 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-09-23 19:41:16,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-23 19:41:16,730 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-09-23 19:41:16,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-23 19:41:16,730 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:16,730 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-09-23 19:41:16,731 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:16,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:16,731 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 87 times [2018-09-23 19:41:16,731 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:16,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:16,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:16,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:16,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:16,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:19,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:19,871 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:19,871 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:19,889 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:41:20,010 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-09-23 19:41:20,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:20,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:20,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:20,065 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:20,065 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-23 19:41:20,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-23 19:41:20,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-23 19:41:20,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 19:41:20,068 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2018-09-23 19:41:20,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:20,355 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-09-23 19:41:20,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-23 19:41:20,356 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-09-23 19:41:20,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:20,357 INFO L225 Difference]: With dead ends: 183 [2018-09-23 19:41:20,357 INFO L226 Difference]: Without dead ends: 181 [2018-09-23 19:41:20,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 19:41:20,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-23 19:41:20,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-23 19:41:20,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-23 19:41:20,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-09-23 19:41:20,360 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2018-09-23 19:41:20,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:20,360 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-09-23 19:41:20,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-23 19:41:20,361 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-09-23 19:41:20,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-23 19:41:20,361 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:20,361 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1] [2018-09-23 19:41:20,361 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:20,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:20,362 INFO L82 PathProgramCache]: Analyzing trace with hash -983013961, now seen corresponding path program 88 times [2018-09-23 19:41:20,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:20,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:20,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:20,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:20,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:20,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:23,176 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:23,176 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:23,184 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:41:23,230 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:41:23,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:23,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:23,286 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:23,286 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-23 19:41:23,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-23 19:41:23,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-23 19:41:23,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 19:41:23,288 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2018-09-23 19:41:23,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:23,483 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-09-23 19:41:23,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-23 19:41:23,484 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-09-23 19:41:23,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:23,485 INFO L225 Difference]: With dead ends: 185 [2018-09-23 19:41:23,485 INFO L226 Difference]: Without dead ends: 183 [2018-09-23 19:41:23,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 19:41:23,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-23 19:41:23,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-09-23 19:41:23,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-23 19:41:23,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-09-23 19:41:23,489 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2018-09-23 19:41:23,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:23,490 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-09-23 19:41:23,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-23 19:41:23,490 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-09-23 19:41:23,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-23 19:41:23,490 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:23,491 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-09-23 19:41:23,491 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:23,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:23,491 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 89 times [2018-09-23 19:41:23,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:23,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:23,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:23,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:23,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:23,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:26,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:26,771 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:26,772 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:26,780 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:41:26,871 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-09-23 19:41:26,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:26,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:26,936 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:26,936 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-23 19:41:26,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-23 19:41:26,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-23 19:41:26,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 19:41:26,938 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2018-09-23 19:41:27,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:27,228 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-09-23 19:41:27,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-23 19:41:27,228 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-09-23 19:41:27,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:27,229 INFO L225 Difference]: With dead ends: 187 [2018-09-23 19:41:27,229 INFO L226 Difference]: Without dead ends: 185 [2018-09-23 19:41:27,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 19:41:27,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-23 19:41:27,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-23 19:41:27,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-23 19:41:27,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-09-23 19:41:27,232 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2018-09-23 19:41:27,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:27,232 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-09-23 19:41:27,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-23 19:41:27,233 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-09-23 19:41:27,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-23 19:41:27,233 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:27,233 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1] [2018-09-23 19:41:27,234 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:27,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:27,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1841124011, now seen corresponding path program 90 times [2018-09-23 19:41:27,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:27,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:27,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:27,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:27,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:30,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:30,567 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:30,567 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:30,577 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:41:30,674 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-09-23 19:41:30,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:30,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:30,731 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:30,731 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-23 19:41:30,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-23 19:41:30,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-23 19:41:30,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-23 19:41:30,732 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2018-09-23 19:41:30,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:30,961 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-09-23 19:41:30,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-23 19:41:30,961 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2018-09-23 19:41:30,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:30,962 INFO L225 Difference]: With dead ends: 189 [2018-09-23 19:41:30,962 INFO L226 Difference]: Without dead ends: 187 [2018-09-23 19:41:30,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-23 19:41:30,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-23 19:41:30,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-23 19:41:30,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-23 19:41:30,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-09-23 19:41:30,967 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2018-09-23 19:41:30,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:30,967 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-09-23 19:41:30,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-23 19:41:30,968 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-09-23 19:41:30,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-23 19:41:30,969 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:30,969 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-09-23 19:41:30,969 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:30,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:30,969 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 91 times [2018-09-23 19:41:30,969 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:30,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:30,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:30,970 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:30,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:33,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:33,995 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:33,996 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:34,004 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:41:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:34,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:34,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:34,109 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:34,109 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-23 19:41:34,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-23 19:41:34,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-23 19:41:34,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 19:41:34,111 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2018-09-23 19:41:34,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:34,291 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-09-23 19:41:34,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-23 19:41:34,292 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-09-23 19:41:34,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:34,293 INFO L225 Difference]: With dead ends: 191 [2018-09-23 19:41:34,293 INFO L226 Difference]: Without dead ends: 189 [2018-09-23 19:41:34,293 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 19:41:34,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-23 19:41:34,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-23 19:41:34,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-23 19:41:34,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-09-23 19:41:34,297 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2018-09-23 19:41:34,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:34,298 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-09-23 19:41:34,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-23 19:41:34,298 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-09-23 19:41:34,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-23 19:41:34,299 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:34,299 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1] [2018-09-23 19:41:34,299 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:34,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:34,299 INFO L82 PathProgramCache]: Analyzing trace with hash -685070945, now seen corresponding path program 92 times [2018-09-23 19:41:34,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:34,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:34,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:34,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:41:34,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:34,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:37,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:37,626 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:37,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:37,633 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:41:37,688 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:41:37,689 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:37,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:37,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:37,755 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:37,755 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-23 19:41:37,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-23 19:41:37,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-23 19:41:37,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 19:41:37,757 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2018-09-23 19:41:37,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:37,922 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-09-23 19:41:37,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-23 19:41:37,922 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2018-09-23 19:41:37,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:37,924 INFO L225 Difference]: With dead ends: 193 [2018-09-23 19:41:37,924 INFO L226 Difference]: Without dead ends: 191 [2018-09-23 19:41:37,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 19:41:37,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-23 19:41:37,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-23 19:41:37,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-23 19:41:37,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-09-23 19:41:37,929 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2018-09-23 19:41:37,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:37,929 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-09-23 19:41:37,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-23 19:41:37,929 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-09-23 19:41:37,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-23 19:41:37,930 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:37,930 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1] [2018-09-23 19:41:37,930 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:37,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:37,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1223129767, now seen corresponding path program 93 times [2018-09-23 19:41:37,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:37,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:37,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:37,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:37,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:42,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:42,021 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:42,021 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:42,028 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:41:42,137 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-09-23 19:41:42,137 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:42,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:42,196 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:42,197 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-23 19:41:42,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-23 19:41:42,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-23 19:41:42,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 19:41:42,198 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2018-09-23 19:41:42,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:42,393 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-09-23 19:41:42,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-23 19:41:42,393 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-09-23 19:41:42,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:42,394 INFO L225 Difference]: With dead ends: 195 [2018-09-23 19:41:42,394 INFO L226 Difference]: Without dead ends: 193 [2018-09-23 19:41:42,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 19:41:42,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-23 19:41:42,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-23 19:41:42,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-23 19:41:42,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-09-23 19:41:42,398 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2018-09-23 19:41:42,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:42,398 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-09-23 19:41:42,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-23 19:41:42,398 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-09-23 19:41:42,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-23 19:41:42,399 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:42,399 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1] [2018-09-23 19:41:42,399 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:42,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:42,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1393385107, now seen corresponding path program 94 times [2018-09-23 19:41:42,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:42,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:42,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:42,400 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:42,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:45,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:45,915 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:45,915 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:45,923 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:41:45,972 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:41:45,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:45,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:46,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:46,059 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:46,059 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-23 19:41:46,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-23 19:41:46,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-23 19:41:46,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-23 19:41:46,060 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2018-09-23 19:41:46,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:46,340 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-09-23 19:41:46,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-23 19:41:46,340 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2018-09-23 19:41:46,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:46,341 INFO L225 Difference]: With dead ends: 197 [2018-09-23 19:41:46,341 INFO L226 Difference]: Without dead ends: 195 [2018-09-23 19:41:46,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-23 19:41:46,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-23 19:41:46,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-23 19:41:46,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-23 19:41:46,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-09-23 19:41:46,345 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2018-09-23 19:41:46,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:46,345 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-09-23 19:41:46,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-23 19:41:46,345 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-09-23 19:41:46,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-23 19:41:46,345 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:46,346 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1] [2018-09-23 19:41:46,346 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:46,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:46,346 INFO L82 PathProgramCache]: Analyzing trace with hash -986656435, now seen corresponding path program 95 times [2018-09-23 19:41:46,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:46,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:46,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:46,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:46,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:46,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:49,627 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:49,628 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:49,640 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:41:49,761 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-09-23 19:41:49,762 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:49,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:49,822 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:49,822 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-23 19:41:49,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-23 19:41:49,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-23 19:41:49,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 19:41:49,824 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 98 states. [2018-09-23 19:41:50,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:50,158 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-09-23 19:41:50,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-23 19:41:50,158 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-09-23 19:41:50,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:50,159 INFO L225 Difference]: With dead ends: 199 [2018-09-23 19:41:50,159 INFO L226 Difference]: Without dead ends: 197 [2018-09-23 19:41:50,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 19:41:50,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-23 19:41:50,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-23 19:41:50,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-23 19:41:50,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-09-23 19:41:50,163 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2018-09-23 19:41:50,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:50,163 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-09-23 19:41:50,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-23 19:41:50,164 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-09-23 19:41:50,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-23 19:41:50,164 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:50,165 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1] [2018-09-23 19:41:50,165 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:50,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:50,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1010990471, now seen corresponding path program 96 times [2018-09-23 19:41:50,165 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:50,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:50,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:50,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:50,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:50,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:53,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:53,615 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:53,615 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:53,622 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:41:53,732 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-09-23 19:41:53,732 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:53,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:53,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:53,794 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:53,794 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-23 19:41:53,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-23 19:41:53,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-23 19:41:53,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-23 19:41:53,795 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 99 states. [2018-09-23 19:41:53,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:53,990 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-09-23 19:41:53,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-23 19:41:53,991 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 196 [2018-09-23 19:41:53,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:53,991 INFO L225 Difference]: With dead ends: 201 [2018-09-23 19:41:53,992 INFO L226 Difference]: Without dead ends: 199 [2018-09-23 19:41:53,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-23 19:41:53,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-23 19:41:53,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-23 19:41:53,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-23 19:41:53,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-09-23 19:41:53,995 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2018-09-23 19:41:53,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:53,995 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-09-23 19:41:53,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-23 19:41:53,995 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-09-23 19:41:53,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-23 19:41:53,996 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:53,996 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1] [2018-09-23 19:41:53,996 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:53,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:53,996 INFO L82 PathProgramCache]: Analyzing trace with hash 899285825, now seen corresponding path program 97 times [2018-09-23 19:41:53,997 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:53,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:53,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:53,997 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:53,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:57,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:57,761 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:57,761 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:57,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:41:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:57,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:57,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:57,879 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:57,879 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-23 19:41:57,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-23 19:41:57,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-23 19:41:57,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 19:41:57,880 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 100 states. [2018-09-23 19:41:58,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:58,214 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-09-23 19:41:58,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-23 19:41:58,215 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2018-09-23 19:41:58,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:58,215 INFO L225 Difference]: With dead ends: 203 [2018-09-23 19:41:58,216 INFO L226 Difference]: Without dead ends: 201 [2018-09-23 19:41:58,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 19:41:58,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-23 19:41:58,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-09-23 19:41:58,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-23 19:41:58,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2018-09-23 19:41:58,220 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2018-09-23 19:41:58,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:58,220 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2018-09-23 19:41:58,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-23 19:41:58,220 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2018-09-23 19:41:58,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-23 19:41:58,221 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:58,221 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1] [2018-09-23 19:41:58,221 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:58,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:58,221 INFO L82 PathProgramCache]: Analyzing trace with hash 925303419, now seen corresponding path program 98 times [2018-09-23 19:41:58,221 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:58,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:58,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:58,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:41:58,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:58,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:42:01,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:01,930 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:42:01,931 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:42:01,937 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:42:01,987 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:42:01,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:42:01,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:02,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:02,049 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:42:02,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-23 19:42:02,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-23 19:42:02,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-23 19:42:02,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-23 19:42:02,050 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 101 states. [2018-09-23 19:42:02,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:02,353 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-09-23 19:42:02,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-23 19:42:02,353 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 200 [2018-09-23 19:42:02,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:02,354 INFO L225 Difference]: With dead ends: 205 [2018-09-23 19:42:02,354 INFO L226 Difference]: Without dead ends: 203 [2018-09-23 19:42:02,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-23 19:42:02,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-23 19:42:02,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-23 19:42:02,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-23 19:42:02,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-09-23 19:42:02,358 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 200 [2018-09-23 19:42:02,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:02,358 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-09-23 19:42:02,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-23 19:42:02,358 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-09-23 19:42:02,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-23 19:42:02,359 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:02,359 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 1, 1, 1] [2018-09-23 19:42:02,359 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:02,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:02,359 INFO L82 PathProgramCache]: Analyzing trace with hash 158407477, now seen corresponding path program 99 times [2018-09-23 19:42:02,359 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:02,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:02,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:02,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:42:02,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:02,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:42:06,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:06,267 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:42:06,267 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:42:06,275 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:42:06,401 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-09-23 19:42:06,401 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:42:06,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:06,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:42:06,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-23 19:42:06,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-23 19:42:06,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-23 19:42:06,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 19:42:06,465 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 102 states. [2018-09-23 19:42:06,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:06,706 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2018-09-23 19:42:06,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-23 19:42:06,706 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 202 [2018-09-23 19:42:06,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:06,707 INFO L225 Difference]: With dead ends: 207 [2018-09-23 19:42:06,707 INFO L226 Difference]: Without dead ends: 205 [2018-09-23 19:42:06,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 19:42:06,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-23 19:42:06,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-23 19:42:06,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-23 19:42:06,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2018-09-23 19:42:06,710 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 202 [2018-09-23 19:42:06,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:06,711 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2018-09-23 19:42:06,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-23 19:42:06,711 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2018-09-23 19:42:06,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-09-23 19:42:06,711 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:06,711 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 1, 1, 1] [2018-09-23 19:42:06,711 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:06,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:06,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1905782127, now seen corresponding path program 100 times [2018-09-23 19:42:06,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:06,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:06,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:06,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:42:06,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:06,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:42:10,626 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:10,626 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:42:10,627 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:42:10,634 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:42:10,685 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:42:10,686 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:42:10,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:10,749 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:42:10,749 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-23 19:42:10,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-23 19:42:10,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-23 19:42:10,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-23 19:42:10,750 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand 103 states. [2018-09-23 19:42:10,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:10,981 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-09-23 19:42:10,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-23 19:42:10,982 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 204 [2018-09-23 19:42:10,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:10,983 INFO L225 Difference]: With dead ends: 209 [2018-09-23 19:42:10,983 INFO L226 Difference]: Without dead ends: 207 [2018-09-23 19:42:10,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-23 19:42:10,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-23 19:42:10,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-09-23 19:42:10,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-09-23 19:42:10,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2018-09-23 19:42:10,988 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 204 [2018-09-23 19:42:10,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:10,989 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2018-09-23 19:42:10,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-23 19:42:10,989 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2018-09-23 19:42:10,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-23 19:42:10,990 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:10,990 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 1, 1, 1] [2018-09-23 19:42:10,990 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:10,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:10,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1800608041, now seen corresponding path program 101 times [2018-09-23 19:42:10,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:10,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:10,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:10,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:42:10,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:42:14,740 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:14,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:42:14,740 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:42:14,747 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:42:15,005 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-09-23 19:42:15,005 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:42:15,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:15,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:15,069 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:42:15,069 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-23 19:42:15,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-23 19:42:15,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-23 19:42:15,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 19:42:15,071 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 104 states. [2018-09-23 19:42:15,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:15,330 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-09-23 19:42:15,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-23 19:42:15,331 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 206 [2018-09-23 19:42:15,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:15,332 INFO L225 Difference]: With dead ends: 211 [2018-09-23 19:42:15,332 INFO L226 Difference]: Without dead ends: 209 [2018-09-23 19:42:15,333 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 19:42:15,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-23 19:42:15,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-09-23 19:42:15,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-23 19:42:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2018-09-23 19:42:15,336 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 206 [2018-09-23 19:42:15,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:15,336 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2018-09-23 19:42:15,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-23 19:42:15,336 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2018-09-23 19:42:15,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-23 19:42:15,337 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:15,337 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 1, 1, 1] [2018-09-23 19:42:15,337 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:15,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:15,337 INFO L82 PathProgramCache]: Analyzing trace with hash -487440797, now seen corresponding path program 102 times [2018-09-23 19:42:15,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:15,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:15,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:15,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:42:15,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:15,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:42:19,363 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:19,364 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:42:19,364 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:42:19,373 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:42:19,493 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-09-23 19:42:19,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:42:19,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:19,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:19,581 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:42:19,581 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-23 19:42:19,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-23 19:42:19,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-23 19:42:19,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-23 19:42:19,583 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 105 states. [2018-09-23 19:42:19,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:19,882 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-09-23 19:42:19,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-23 19:42:19,883 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 208 [2018-09-23 19:42:19,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:19,883 INFO L225 Difference]: With dead ends: 213 [2018-09-23 19:42:19,884 INFO L226 Difference]: Without dead ends: 211 [2018-09-23 19:42:19,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-23 19:42:19,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-23 19:42:19,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-23 19:42:19,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-23 19:42:19,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2018-09-23 19:42:19,888 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 208 [2018-09-23 19:42:19,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:19,888 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2018-09-23 19:42:19,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-23 19:42:19,888 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2018-09-23 19:42:19,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-23 19:42:19,889 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:19,889 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 1, 1, 1] [2018-09-23 19:42:19,890 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:19,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:19,890 INFO L82 PathProgramCache]: Analyzing trace with hash -279118563, now seen corresponding path program 103 times [2018-09-23 19:42:19,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:19,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:19,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:19,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:42:19,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:42:24,024 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:24,025 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:42:24,025 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:42:24,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:42:24,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:42:24,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:24,166 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:42:24,166 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-23 19:42:24,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-23 19:42:24,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-23 19:42:24,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 19:42:24,168 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 106 states. [2018-09-23 19:42:24,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:24,564 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2018-09-23 19:42:24,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-23 19:42:24,564 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 210 [2018-09-23 19:42:24,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:24,565 INFO L225 Difference]: With dead ends: 215 [2018-09-23 19:42:24,565 INFO L226 Difference]: Without dead ends: 213 [2018-09-23 19:42:24,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 19:42:24,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-09-23 19:42:24,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-09-23 19:42:24,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-09-23 19:42:24,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2018-09-23 19:42:24,569 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 210 [2018-09-23 19:42:24,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:24,569 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2018-09-23 19:42:24,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-23 19:42:24,569 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2018-09-23 19:42:24,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-23 19:42:24,570 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:24,570 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 1, 1, 1] [2018-09-23 19:42:24,570 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:24,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:24,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1944914601, now seen corresponding path program 104 times [2018-09-23 19:42:24,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:24,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:24,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:24,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:42:24,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:42:28,828 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:28,828 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:42:28,828 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:42:28,836 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:42:28,890 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:42:28,891 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:42:28,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:28,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:28,982 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:42:28,982 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-23 19:42:28,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-23 19:42:28,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-23 19:42:28,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-23 19:42:28,984 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 107 states. [2018-09-23 19:42:29,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:29,344 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-09-23 19:42:29,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-23 19:42:29,344 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 212 [2018-09-23 19:42:29,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:29,345 INFO L225 Difference]: With dead ends: 217 [2018-09-23 19:42:29,345 INFO L226 Difference]: Without dead ends: 215 [2018-09-23 19:42:29,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-23 19:42:29,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-09-23 19:42:29,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-09-23 19:42:29,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-23 19:42:29,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-09-23 19:42:29,350 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 212 [2018-09-23 19:42:29,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:29,350 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-09-23 19:42:29,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-23 19:42:29,351 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-09-23 19:42:29,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-09-23 19:42:29,351 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:29,352 INFO L375 BasicCegarLoop]: trace histogram [106, 105, 1, 1, 1] [2018-09-23 19:42:29,352 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:29,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:29,352 INFO L82 PathProgramCache]: Analyzing trace with hash -752105711, now seen corresponding path program 105 times [2018-09-23 19:42:29,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:29,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:29,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:29,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:42:29,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:29,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:42:33,819 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:33,819 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:42:33,820 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:42:33,827 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:42:33,988 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 106 check-sat command(s) [2018-09-23 19:42:33,988 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:42:33,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:34,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:34,057 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:42:34,057 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-23 19:42:34,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-23 19:42:34,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-23 19:42:34,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 19:42:34,059 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 108 states. [2018-09-23 19:42:34,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:34,443 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2018-09-23 19:42:34,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-23 19:42:34,444 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 214 [2018-09-23 19:42:34,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:34,444 INFO L225 Difference]: With dead ends: 219 [2018-09-23 19:42:34,444 INFO L226 Difference]: Without dead ends: 217 [2018-09-23 19:42:34,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 19:42:34,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-09-23 19:42:34,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-09-23 19:42:34,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-09-23 19:42:34,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2018-09-23 19:42:34,448 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 214 [2018-09-23 19:42:34,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:34,449 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2018-09-23 19:42:34,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-23 19:42:34,449 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2018-09-23 19:42:34,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-09-23 19:42:34,450 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:34,450 INFO L375 BasicCegarLoop]: trace histogram [107, 106, 1, 1, 1] [2018-09-23 19:42:34,450 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:34,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:34,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1219030453, now seen corresponding path program 106 times [2018-09-23 19:42:34,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:34,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:34,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:34,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:42:34,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:34,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:42:38,890 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:38,891 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:42:38,891 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:42:38,898 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:42:38,954 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:42:38,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:42:38,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:39,002 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:39,022 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:42:39,022 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-23 19:42:39,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-23 19:42:39,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-23 19:42:39,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-23 19:42:39,024 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 109 states. [2018-09-23 19:42:39,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:39,336 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2018-09-23 19:42:39,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-23 19:42:39,336 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 216 [2018-09-23 19:42:39,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:39,337 INFO L225 Difference]: With dead ends: 221 [2018-09-23 19:42:39,337 INFO L226 Difference]: Without dead ends: 219 [2018-09-23 19:42:39,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-23 19:42:39,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-23 19:42:39,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-09-23 19:42:39,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-09-23 19:42:39,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2018-09-23 19:42:39,341 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 216 [2018-09-23 19:42:39,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:39,341 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2018-09-23 19:42:39,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-23 19:42:39,341 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2018-09-23 19:42:39,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-23 19:42:39,342 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:39,342 INFO L375 BasicCegarLoop]: trace histogram [108, 107, 1, 1, 1] [2018-09-23 19:42:39,342 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:39,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:39,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1037858565, now seen corresponding path program 107 times [2018-09-23 19:42:39,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:39,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:39,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:39,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:42:39,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:39,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:42:43,874 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:43,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:42:43,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:42:43,882 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:42:44,007 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 108 check-sat command(s) [2018-09-23 19:42:44,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:42:44,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:44,057 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:44,078 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:42:44,078 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-23 19:42:44,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-23 19:42:44,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-23 19:42:44,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-23 19:42:44,080 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 110 states. [2018-09-23 19:42:44,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:44,463 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2018-09-23 19:42:44,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-23 19:42:44,464 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 218 [2018-09-23 19:42:44,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:44,464 INFO L225 Difference]: With dead ends: 223 [2018-09-23 19:42:44,465 INFO L226 Difference]: Without dead ends: 221 [2018-09-23 19:42:44,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-23 19:42:44,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-23 19:42:44,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-09-23 19:42:44,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-23 19:42:44,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2018-09-23 19:42:44,470 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 218 [2018-09-23 19:42:44,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:44,471 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2018-09-23 19:42:44,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-23 19:42:44,471 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2018-09-23 19:42:44,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-09-23 19:42:44,472 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:44,472 INFO L375 BasicCegarLoop]: trace histogram [109, 108, 1, 1, 1] [2018-09-23 19:42:44,472 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:44,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:44,472 INFO L82 PathProgramCache]: Analyzing trace with hash 949720383, now seen corresponding path program 108 times [2018-09-23 19:42:44,473 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:44,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:44,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:44,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:42:44,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:44,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:42:49,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11772 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:49,125 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:42:49,125 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:42:49,133 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:42:49,264 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 109 check-sat command(s) [2018-09-23 19:42:49,264 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:42:49,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:49,313 INFO L134 CoverageAnalysis]: Checked inductivity of 11772 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:49,334 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:42:49,334 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-23 19:42:49,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-23 19:42:49,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-23 19:42:49,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-23 19:42:49,336 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand 111 states. [2018-09-23 19:42:49,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:49,795 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2018-09-23 19:42:49,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-23 19:42:49,796 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 220 [2018-09-23 19:42:49,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:49,796 INFO L225 Difference]: With dead ends: 225 [2018-09-23 19:42:49,796 INFO L226 Difference]: Without dead ends: 223 [2018-09-23 19:42:49,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-23 19:42:49,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-23 19:42:49,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-09-23 19:42:49,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-09-23 19:42:49,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2018-09-23 19:42:49,800 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 220 [2018-09-23 19:42:49,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:49,801 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2018-09-23 19:42:49,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-23 19:42:49,801 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2018-09-23 19:42:49,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-23 19:42:49,801 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:49,802 INFO L375 BasicCegarLoop]: trace histogram [110, 109, 1, 1, 1] [2018-09-23 19:42:49,802 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:49,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:49,802 INFO L82 PathProgramCache]: Analyzing trace with hash -2146693895, now seen corresponding path program 109 times [2018-09-23 19:42:49,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:49,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:49,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:49,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:42:49,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:49,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-23 19:42:50,103 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 19:42:50,107 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 19:42:50,107 INFO L202 PluginConnector]: Adding new model count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 07:42:50 BoogieIcfgContainer [2018-09-23 19:42:50,107 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 19:42:50,108 INFO L168 Benchmark]: Toolchain (without parser) took 230792.84 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 52.4 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 36.8 MB). Peak memory consumption was 89.3 MB. Max. memory is 7.1 GB. [2018-09-23 19:42:50,109 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 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 19:42:50,109 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.05 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 19:42:50,110 INFO L168 Benchmark]: Boogie Preprocessor took 21.51 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 19:42:50,110 INFO L168 Benchmark]: RCFGBuilder took 296.32 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 19:42:50,110 INFO L168 Benchmark]: TraceAbstraction took 230428.14 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 52.4 MB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 15.7 MB). Peak memory consumption was 68.1 MB. Max. memory is 7.1 GB. [2018-09-23 19:42:50,112 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 0.23 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 41.05 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 21.51 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. * RCFGBuilder took 296.32 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 230428.14 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 52.4 MB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 15.7 MB). Peak memory consumption was 68.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 31]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 31). Cancelled while BasicCegarLoop was analyzing trace of length 223 with TraceHistMax 110, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 23 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 230.3s OverallTime, 110 OverallIterations, 110 TraceHistogramMax, 22.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 436 SDtfs, 0 SDslu, 9657 SDs, 0 SdLazy, 9766 SolverSat, 183 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18200 GetRequests, 12205 SyntacticMatches, 0 SemanticMatches, 5995 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 189.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=223occurred in iteration=109, 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: 0.4s AutomataMinimizationTime, 109 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 6.8s SatisfiabilityAnalysisTime, 194.4s InterpolantComputationTime, 24412 NumberOfCodeBlocks, 24412 NumberOfCodeBlocksAsserted, 3259 NumberOfCheckSat, 24195 ConstructedInterpolants, 0 QuantifiedInterpolants, 10599357 SizeOfPredicates, 108 NumberOfNonLiveVariables, 24948 ConjunctsInSsa, 6102 ConjunctsInUnsatCore, 217 InterpolantComputations, 1 PerfectInterpolantSequences, 0/863280 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_2.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_19-42-50-121.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_2.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_19-42-50-121.csv Completed graceful shutdown