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_PUPT.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/array3.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f [2018-10-04 12:46:45,025 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 12:46:45,030 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 12:46:45,048 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 12:46:45,048 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 12:46:45,050 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 12:46:45,051 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 12:46:45,055 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 12:46:45,056 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 12:46:45,059 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 12:46:45,062 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-04 12:46:45,096 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-04 12:46:45,111 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 12:46:45,111 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 12:46:45,112 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 12:46:45,112 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 12:46:45,113 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 12:46:45,113 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 12:46:45,113 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 12:46:45,113 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 12:46:45,114 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 12:46:45,114 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 12:46:45,114 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 12:46:45,114 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 12:46:45,114 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 12:46:45,114 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 12:46:45,115 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 12:46:45,115 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 12:46:45,115 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 12:46:45,115 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 12:46:45,115 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 12:46:45,116 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 12:46:45,116 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 12:46:45,116 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 12:46:45,116 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:46:45,116 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 12:46:45,117 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 12:46:45,117 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 12:46:45,117 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 12:46:45,117 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 12:46:45,118 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 12:46:45,118 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 12:46:45,118 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 12:46:45,177 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 12:46:45,193 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 12:46:45,197 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 12:46:45,201 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 12:46:45,202 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 12:46:45,203 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array3.i_4.bpl [2018-10-04 12:46:45,203 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array3.i_4.bpl' [2018-10-04 12:46:45,269 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 12:46:45,271 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 12:46:45,273 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 12:46:45,273 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 12:46:45,274 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 12:46:45,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:45" (1/1) ... [2018-10-04 12:46:45,312 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:45" (1/1) ... [2018-10-04 12:46:45,321 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 12:46:45,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 12:46:45,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 12:46:45,322 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 12:46:45,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:45" (1/1) ... [2018-10-04 12:46:45,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:45" (1/1) ... [2018-10-04 12:46:45,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:45" (1/1) ... [2018-10-04 12:46:45,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:45" (1/1) ... [2018-10-04 12:46:45,339 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:45" (1/1) ... [2018-10-04 12:46:45,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:45" (1/1) ... [2018-10-04 12:46:45,342 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:45" (1/1) ... [2018-10-04 12:46:45,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 12:46:45,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 12:46:45,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 12:46:45,345 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 12:46:45,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:45" (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 [2018-10-04 12:46:45,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 12:46:45,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 12:46:45,644 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 12:46:45,645 INFO L202 PluginConnector]: Adding new model array3.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:46:45 BoogieIcfgContainer [2018-10-04 12:46:45,645 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 12:46:45,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 12:46:45,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 12:46:45,653 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 12:46:45,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:45" (1/2) ... [2018-10-04 12:46:45,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@203852de and model type array3.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 12:46:45, skipping insertion in model container [2018-10-04 12:46:45,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:46:45" (2/2) ... [2018-10-04 12:46:45,658 INFO L112 eAbstractionObserver]: Analyzing ICFG array3.i_4.bpl [2018-10-04 12:46:45,668 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 12:46:45,677 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 12:46:45,723 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 12:46:45,724 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 12:46:45,724 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 12:46:45,725 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 12:46:45,725 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 12:46:45,725 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 12:46:45,725 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 12:46:45,725 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 12:46:45,726 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 12:46:45,740 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-10-04 12:46:45,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 12:46:45,748 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:45,750 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-04 12:46:45,752 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:45,761 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:45,762 INFO L82 PathProgramCache]: Analyzing trace with hash 889539531, now seen corresponding path program 1 times [2018-10-04 12:46:45,765 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:45,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:45,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:45,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:45,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:45,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:45,912 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:46:45,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 12:46:45,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 12:46:45,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 12:46:45,932 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:45,934 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2018-10-04 12:46:46,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:46,036 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2018-10-04 12:46:46,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 12:46:46,039 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2018-10-04 12:46:46,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:46,055 INFO L225 Difference]: With dead ends: 17 [2018-10-04 12:46:46,055 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 12:46:46,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-04 12:46:46,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 12:46:46,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 12:46:46,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 12:46:46,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-04 12:46:46,106 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2018-10-04 12:46:46,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:46,106 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-04 12:46:46,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 12:46:46,107 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-04 12:46:46,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 12:46:46,108 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:46,108 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-10-04 12:46:46,108 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:46,109 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:46,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1897191999, now seen corresponding path program 1 times [2018-10-04 12:46:46,109 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:46,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:46,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:46,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:46,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:46,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-04 12:46:46,181 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:46,181 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 [2018-10-04 12:46:46,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:46,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:46,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:46,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-04 12:46:46,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:46,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 12:46:46,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 12:46:46,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 12:46:46,353 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:46,354 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 4 states. [2018-10-04 12:46:46,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:46,430 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-10-04 12:46:46,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 12:46:46,431 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-10-04 12:46:46,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:46,432 INFO L225 Difference]: With dead ends: 21 [2018-10-04 12:46:46,432 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 12:46:46,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 2 [2018-10-04 12:46:46,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 12:46:46,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 12:46:46,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 12:46:46,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-04 12:46:46,438 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2018-10-04 12:46:46,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:46,439 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-04 12:46:46,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 12:46:46,439 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-04 12:46:46,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 12:46:46,440 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:46,440 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-10-04 12:46:46,440 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:46,441 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:46,441 INFO L82 PathProgramCache]: Analyzing trace with hash 87273139, now seen corresponding path program 2 times [2018-10-04 12:46:46,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:46,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:46,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:46,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:46,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:46,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-04 12:46:46,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:46,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:46:46,592 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:46:46,620 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:46:46,621 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:46,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:46,670 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-04 12:46:46,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:46,692 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 12:46:46,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 12:46:46,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 12:46:46,693 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:46,693 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2018-10-04 12:46:46,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:46,826 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-10-04 12:46:46,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:46:46,827 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-10-04 12:46:46,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:46,828 INFO L225 Difference]: With dead ends: 27 [2018-10-04 12:46:46,828 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 12:46:46,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 3 [2018-10-04 12:46:46,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 12:46:46,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 12:46:46,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 12:46:46,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-10-04 12:46:46,836 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2018-10-04 12:46:46,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:46,836 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-10-04 12:46:46,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 12:46:46,837 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-10-04 12:46:46,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 12:46:46,837 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:46,838 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-10-04 12:46:46,838 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:46,839 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:46,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1310275289, now seen corresponding path program 3 times [2018-10-04 12:46:46,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:46,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:46,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:46,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:46,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:46,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:47,032 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-04 12:46:47,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:47,033 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 [2018-10-04 12:46:47,050 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:46:47,119 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 12:46:47,119 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:47,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:47,232 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-04 12:46:47,265 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:47,265 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 12:46:47,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 12:46:47,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 12:46:47,269 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:47,269 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2018-10-04 12:46:47,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:47,350 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2018-10-04 12:46:47,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:46:47,350 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-10-04 12:46:47,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:47,351 INFO L225 Difference]: With dead ends: 33 [2018-10-04 12:46:47,351 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 12:46:47,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 4 [2018-10-04 12:46:47,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 12:46:47,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 12:46:47,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 12:46:47,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-10-04 12:46:47,358 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 18 [2018-10-04 12:46:47,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:47,359 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-10-04 12:46:47,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 12:46:47,359 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-10-04 12:46:47,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 12:46:47,360 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:47,360 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2018-10-04 12:46:47,360 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:47,361 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:47,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1731406235, now seen corresponding path program 4 times [2018-10-04 12:46:47,361 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:47,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:47,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:47,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:47,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:47,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:47,499 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-10-04 12:46:47,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:47,500 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:46:47,508 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:46:47,554 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:46:47,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:47,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-10-04 12:46:47,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:47,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 12:46:47,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 12:46:47,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 12:46:47,692 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:47,692 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 7 states. [2018-10-04 12:46:47,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:47,755 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2018-10-04 12:46:47,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 12:46:47,759 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2018-10-04 12:46:47,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:47,760 INFO L225 Difference]: With dead ends: 39 [2018-10-04 12:46:47,760 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 12:46:47,760 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 5 [2018-10-04 12:46:47,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 12:46:47,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 12:46:47,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 12:46:47,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-04 12:46:47,766 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 22 [2018-10-04 12:46:47,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:47,766 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-04 12:46:47,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 12:46:47,767 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-04 12:46:47,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 12:46:47,767 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:47,768 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-10-04 12:46:47,768 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:47,768 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:47,768 INFO L82 PathProgramCache]: Analyzing trace with hash 77451279, now seen corresponding path program 5 times [2018-10-04 12:46:47,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:47,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:47,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:47,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:47,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:47,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:47,881 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-10-04 12:46:47,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:47,882 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 [2018-10-04 12:46:47,892 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:46:47,935 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 12:46:47,936 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:47,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-10-04 12:46:48,019 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:48,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 12:46:48,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:46:48,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:46:48,020 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:48,020 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 8 states. [2018-10-04 12:46:48,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:48,215 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2018-10-04 12:46:48,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 12:46:48,216 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-10-04 12:46:48,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:48,217 INFO L225 Difference]: With dead ends: 45 [2018-10-04 12:46:48,217 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 12:46:48,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 6 [2018-10-04 12:46:48,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 12:46:48,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 12:46:48,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 12:46:48,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-10-04 12:46:48,223 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 26 [2018-10-04 12:46:48,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:48,224 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-10-04 12:46:48,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:46:48,224 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-10-04 12:46:48,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 12:46:48,225 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:48,225 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2018-10-04 12:46:48,226 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:48,226 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:48,226 INFO L82 PathProgramCache]: Analyzing trace with hash 422296707, now seen corresponding path program 6 times [2018-10-04 12:46:48,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:48,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:48,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:48,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:48,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:48,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:48,360 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-10-04 12:46:48,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:48,361 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 [2018-10-04 12:46:48,379 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:46:48,422 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 12:46:48,423 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:48,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:48,492 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-10-04 12:46:48,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:48,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 12:46:48,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 12:46:48,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 12:46:48,514 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:48,514 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 9 states. [2018-10-04 12:46:48,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:48,580 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2018-10-04 12:46:48,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 12:46:48,581 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2018-10-04 12:46:48,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:48,582 INFO L225 Difference]: With dead ends: 51 [2018-10-04 12:46:48,583 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 12:46:48,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 7 [2018-10-04 12:46:48,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 12:46:48,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 12:46:48,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 12:46:48,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-10-04 12:46:48,589 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 30 [2018-10-04 12:46:48,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:48,589 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-10-04 12:46:48,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 12:46:48,590 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-10-04 12:46:48,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 12:46:48,591 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:48,591 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-10-04 12:46:48,591 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:48,592 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:48,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1553862921, now seen corresponding path program 7 times [2018-10-04 12:46:48,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:48,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:48,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:48,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:48,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:48,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:48,910 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2018-10-04 12:46:48,910 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:48,910 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:46:48,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:48,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:49,438 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2018-10-04 12:46:49,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:49,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 12:46:49,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:46:49,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:46:49,461 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:49,462 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 10 states. [2018-10-04 12:46:49,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:49,573 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2018-10-04 12:46:49,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:46:49,573 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2018-10-04 12:46:49,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:49,576 INFO L225 Difference]: With dead ends: 57 [2018-10-04 12:46:49,576 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 12:46:49,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.1s impTime 8 [2018-10-04 12:46:49,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 12:46:49,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 12:46:49,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 12:46:49,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-10-04 12:46:49,583 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2018-10-04 12:46:49,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:49,585 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-10-04 12:46:49,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:46:49,585 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-10-04 12:46:49,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 12:46:49,586 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:49,586 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2018-10-04 12:46:49,587 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:49,587 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:49,587 INFO L82 PathProgramCache]: Analyzing trace with hash -783980693, now seen corresponding path program 8 times [2018-10-04 12:46:49,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:49,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:49,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:49,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:49,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-10-04 12:46:49,749 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:49,749 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 [2018-10-04 12:46:49,766 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:46:49,793 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:46:49,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:49,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:49,904 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-10-04 12:46:49,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:49,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 12:46:49,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 12:46:49,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 12:46:49,927 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:49,927 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 11 states. [2018-10-04 12:46:50,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:50,129 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2018-10-04 12:46:50,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:46:50,132 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2018-10-04 12:46:50,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:50,133 INFO L225 Difference]: With dead ends: 63 [2018-10-04 12:46:50,133 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 12:46:50,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 9 [2018-10-04 12:46:50,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 12:46:50,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 12:46:50,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 12:46:50,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-10-04 12:46:50,140 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38 [2018-10-04 12:46:50,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:50,140 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-10-04 12:46:50,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 12:46:50,141 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-10-04 12:46:50,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 12:46:50,142 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:50,142 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-10-04 12:46:50,142 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:50,142 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:50,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1067768353, now seen corresponding path program 9 times [2018-10-04 12:46:50,143 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:50,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:50,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:50,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:50,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:50,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:50,368 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-10-04 12:46:50,368 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:50,368 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 [2018-10-04 12:46:50,378 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:46:50,523 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-04 12:46:50,523 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:50,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:50,747 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-10-04 12:46:50,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:50,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 12:46:50,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 12:46:50,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 12:46:50,769 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:50,770 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 12 states. [2018-10-04 12:46:50,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:50,846 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2018-10-04 12:46:50,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 12:46:50,847 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2018-10-04 12:46:50,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:50,847 INFO L225 Difference]: With dead ends: 69 [2018-10-04 12:46:50,848 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 12:46:50,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 10 [2018-10-04 12:46:50,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 12:46:50,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 12:46:50,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 12:46:50,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-10-04 12:46:50,855 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 42 [2018-10-04 12:46:50,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:50,856 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-10-04 12:46:50,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 12:46:50,856 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-10-04 12:46:50,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 12:46:50,857 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:50,857 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2018-10-04 12:46:50,857 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:50,858 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:50,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1034431059, now seen corresponding path program 10 times [2018-10-04 12:46:50,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:50,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:50,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:50,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:50,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:50,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:51,110 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2018-10-04 12:46:51,110 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:51,110 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 [2018-10-04 12:46:51,118 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:46:51,146 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:46:51,146 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:51,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:51,252 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2018-10-04 12:46:51,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:51,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 12:46:51,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 12:46:51,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 12:46:51,275 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:51,275 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 13 states. [2018-10-04 12:46:51,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:51,377 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2018-10-04 12:46:51,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 12:46:51,378 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2018-10-04 12:46:51,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:51,379 INFO L225 Difference]: With dead ends: 75 [2018-10-04 12:46:51,379 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 12:46:51,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 11 [2018-10-04 12:46:51,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 12:46:51,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 12:46:51,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 12:46:51,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-10-04 12:46:51,387 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46 [2018-10-04 12:46:51,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:51,388 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-10-04 12:46:51,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 12:46:51,388 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-10-04 12:46:51,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 12:46:51,389 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:51,389 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-10-04 12:46:51,390 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:51,390 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:51,390 INFO L82 PathProgramCache]: Analyzing trace with hash -2051967801, now seen corresponding path program 11 times [2018-10-04 12:46:51,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:51,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:51,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:51,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:51,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:51,579 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2018-10-04 12:46:51,580 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:51,580 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 [2018-10-04 12:46:51,589 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:46:51,637 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-04 12:46:51,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:51,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:51,714 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2018-10-04 12:46:51,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:51,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 12:46:51,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:46:51,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:46:51,736 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:51,736 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 14 states. [2018-10-04 12:46:51,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:51,809 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2018-10-04 12:46:51,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 12:46:51,809 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2018-10-04 12:46:51,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:51,811 INFO L225 Difference]: With dead ends: 81 [2018-10-04 12:46:51,811 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 12:46:51,812 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 12 [2018-10-04 12:46:51,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 12:46:51,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 12:46:51,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 12:46:51,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-10-04 12:46:51,819 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 50 [2018-10-04 12:46:51,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:51,820 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-10-04 12:46:51,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:46:51,820 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-10-04 12:46:51,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 12:46:51,821 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:51,821 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2018-10-04 12:46:51,821 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:51,822 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:51,822 INFO L82 PathProgramCache]: Analyzing trace with hash 75236667, now seen corresponding path program 12 times [2018-10-04 12:46:51,822 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:51,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:51,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:51,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:51,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2018-10-04 12:46:52,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:52,008 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:46:52,016 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:46:52,059 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 12:46:52,060 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:52,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:52,253 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2018-10-04 12:46:52,276 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:52,276 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 12:46:52,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 12:46:52,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 12:46:52,277 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:52,277 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 15 states. [2018-10-04 12:46:52,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:52,395 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2018-10-04 12:46:52,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 12:46:52,396 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 54 [2018-10-04 12:46:52,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:52,397 INFO L225 Difference]: With dead ends: 87 [2018-10-04 12:46:52,397 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 12:46:52,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.0s impTime 13 [2018-10-04 12:46:52,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 12:46:52,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 12:46:52,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 12:46:52,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-10-04 12:46:52,405 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2018-10-04 12:46:52,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:52,405 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-10-04 12:46:52,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 12:46:52,405 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-10-04 12:46:52,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 12:46:52,406 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:52,406 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-10-04 12:46:52,406 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:52,407 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:52,407 INFO L82 PathProgramCache]: Analyzing trace with hash 361552815, now seen corresponding path program 13 times [2018-10-04 12:46:52,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:52,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:52,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:52,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:52,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:52,745 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2018-10-04 12:46:52,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:52,746 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 [2018-10-04 12:46:52,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:52,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:52,976 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2018-10-04 12:46:52,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:52,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 12:46:52,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 12:46:52,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 12:46:52,997 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:52,998 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 16 states. [2018-10-04 12:46:53,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:53,257 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2018-10-04 12:46:53,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 12:46:53,257 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2018-10-04 12:46:53,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:53,258 INFO L225 Difference]: With dead ends: 93 [2018-10-04 12:46:53,259 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 12:46:53,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 14 [2018-10-04 12:46:53,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 12:46:53,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-04 12:46:53,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 12:46:53,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-10-04 12:46:53,267 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 58 [2018-10-04 12:46:53,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:53,268 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-10-04 12:46:53,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 12:46:53,268 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-10-04 12:46:53,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 12:46:53,270 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:53,270 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2018-10-04 12:46:53,270 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:53,271 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:53,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1008142301, now seen corresponding path program 14 times [2018-10-04 12:46:53,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:53,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:53,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:53,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:53,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-10-04 12:46:53,805 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:53,805 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 [2018-10-04 12:46:53,818 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:46:53,857 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:46:53,857 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:53,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:54,085 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-10-04 12:46:54,105 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:54,105 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 12:46:54,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 12:46:54,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 12:46:54,106 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:54,106 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 17 states. [2018-10-04 12:46:54,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:54,179 INFO L93 Difference]: Finished difference Result 99 states and 102 transitions. [2018-10-04 12:46:54,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 12:46:54,179 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2018-10-04 12:46:54,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:54,181 INFO L225 Difference]: With dead ends: 99 [2018-10-04 12:46:54,181 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 12:46:54,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 15 [2018-10-04 12:46:54,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 12:46:54,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-04 12:46:54,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 12:46:54,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-10-04 12:46:54,187 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2018-10-04 12:46:54,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:54,187 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-10-04 12:46:54,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 12:46:54,187 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-10-04 12:46:54,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 12:46:54,189 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:54,189 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-10-04 12:46:54,190 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:54,190 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:54,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1978312041, now seen corresponding path program 15 times [2018-10-04 12:46:54,190 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:54,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:54,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:54,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:54,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:54,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:54,606 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2018-10-04 12:46:54,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:54,606 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 [2018-10-04 12:46:54,614 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:46:54,696 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-04 12:46:54,696 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:54,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2018-10-04 12:46:54,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:54,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 12:46:54,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 12:46:54,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 12:46:54,815 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:54,815 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 18 states. [2018-10-04 12:46:55,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:55,142 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2018-10-04 12:46:55,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 12:46:55,142 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 66 [2018-10-04 12:46:55,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:55,143 INFO L225 Difference]: With dead ends: 105 [2018-10-04 12:46:55,143 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 12:46:55,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 16 [2018-10-04 12:46:55,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 12:46:55,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-04 12:46:55,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-04 12:46:55,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-10-04 12:46:55,149 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 66 [2018-10-04 12:46:55,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:55,150 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-10-04 12:46:55,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 12:46:55,150 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-10-04 12:46:55,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-04 12:46:55,151 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:55,151 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2018-10-04 12:46:55,151 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:55,152 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:55,152 INFO L82 PathProgramCache]: Analyzing trace with hash 303497995, now seen corresponding path program 16 times [2018-10-04 12:46:55,152 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:55,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:55,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:55,153 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:55,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:55,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2018-10-04 12:46:55,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:55,524 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 [2018-10-04 12:46:55,531 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:46:55,562 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:46:55,562 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:55,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:55,668 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2018-10-04 12:46:55,690 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:55,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 12:46:55,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 12:46:55,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 12:46:55,691 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:55,691 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 19 states. [2018-10-04 12:46:55,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:55,769 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2018-10-04 12:46:55,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 12:46:55,770 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 70 [2018-10-04 12:46:55,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:55,771 INFO L225 Difference]: With dead ends: 111 [2018-10-04 12:46:55,771 INFO L226 Difference]: Without dead ends: 75 [2018-10-04 12:46:55,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 17 [2018-10-04 12:46:55,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-04 12:46:55,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-04 12:46:55,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 12:46:55,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-04 12:46:55,777 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 70 [2018-10-04 12:46:55,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:55,777 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-04 12:46:55,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 12:46:55,778 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-04 12:46:55,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 12:46:55,778 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:55,778 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-10-04 12:46:55,779 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:55,779 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:55,779 INFO L82 PathProgramCache]: Analyzing trace with hash -177016449, now seen corresponding path program 17 times [2018-10-04 12:46:55,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:55,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:55,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:55,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:55,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:56,087 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2018-10-04 12:46:56,087 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:56,087 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:46:56,095 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:46:56,169 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-04 12:46:56,170 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:56,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:56,483 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2018-10-04 12:46:56,522 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:56,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 12:46:56,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:46:56,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:46:56,524 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:56,524 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 20 states. [2018-10-04 12:46:56,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:56,944 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2018-10-04 12:46:56,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 12:46:56,945 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 74 [2018-10-04 12:46:56,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:56,946 INFO L225 Difference]: With dead ends: 117 [2018-10-04 12:46:56,946 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 12:46:56,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 18 [2018-10-04 12:46:56,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 12:46:56,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-04 12:46:56,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-04 12:46:56,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-10-04 12:46:56,951 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2018-10-04 12:46:56,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:56,952 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-10-04 12:46:56,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:46:56,952 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-10-04 12:46:56,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 12:46:56,953 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:56,953 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2018-10-04 12:46:56,953 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:56,953 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:56,953 INFO L82 PathProgramCache]: Analyzing trace with hash 2100176371, now seen corresponding path program 18 times [2018-10-04 12:46:56,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:56,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:56,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:56,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:56,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:58,153 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:46:58,159 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2018-10-04 12:46:58,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:58,159 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 [2018-10-04 12:46:58,167 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:46:58,231 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 12:46:58,232 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:58,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:58,330 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2018-10-04 12:46:58,350 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:58,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 12:46:58,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 12:46:58,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 12:46:58,351 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:58,352 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 21 states. [2018-10-04 12:46:58,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:58,454 INFO L93 Difference]: Finished difference Result 123 states and 126 transitions. [2018-10-04 12:46:58,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 12:46:58,454 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 78 [2018-10-04 12:46:58,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:58,456 INFO L225 Difference]: With dead ends: 123 [2018-10-04 12:46:58,456 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 12:46:58,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime 6 [2018-10-04 12:46:58,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 12:46:58,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-04 12:46:58,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-04 12:46:58,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-10-04 12:46:58,462 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 78 [2018-10-04 12:46:58,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:58,463 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-10-04 12:46:58,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 12:46:58,463 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-10-04 12:46:58,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 12:46:58,464 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:58,464 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-10-04 12:46:58,464 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:58,464 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:58,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1640865895, now seen corresponding path program 19 times [2018-10-04 12:46:58,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:58,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:58,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:58,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:58,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:58,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:58,917 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:46:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2018-10-04 12:46:58,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:58,946 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 [2018-10-04 12:46:58,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:58,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:59,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2018-10-04 12:46:59,155 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:59,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 12:46:59,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 12:46:59,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 12:46:59,156 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:59,156 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 22 states. [2018-10-04 12:46:59,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:59,253 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2018-10-04 12:46:59,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 12:46:59,254 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 82 [2018-10-04 12:46:59,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:59,255 INFO L225 Difference]: With dead ends: 129 [2018-10-04 12:46:59,255 INFO L226 Difference]: Without dead ends: 87 [2018-10-04 12:46:59,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 7 [2018-10-04 12:46:59,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-04 12:46:59,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-04 12:46:59,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-04 12:46:59,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-10-04 12:46:59,261 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 82 [2018-10-04 12:46:59,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:59,261 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-10-04 12:46:59,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 12:46:59,262 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-10-04 12:46:59,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 12:46:59,262 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:59,263 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2018-10-04 12:46:59,263 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:59,263 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:59,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1957273381, now seen corresponding path program 20 times [2018-10-04 12:46:59,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:59,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:59,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:59,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:59,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:59,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:59,583 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:46:59,619 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2018-10-04 12:46:59,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:59,619 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 [2018-10-04 12:46:59,627 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:46:59,674 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:46:59,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:59,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2018-10-04 12:46:59,864 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:59,864 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 12:46:59,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 12:46:59,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 12:46:59,865 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:59,865 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 23 states. [2018-10-04 12:46:59,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:59,943 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2018-10-04 12:46:59,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 12:46:59,944 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2018-10-04 12:46:59,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:59,945 INFO L225 Difference]: With dead ends: 135 [2018-10-04 12:46:59,945 INFO L226 Difference]: Without dead ends: 91 [2018-10-04 12:46:59,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 8 [2018-10-04 12:46:59,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-04 12:46:59,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-04 12:46:59,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 12:46:59,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-10-04 12:46:59,949 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 86 [2018-10-04 12:46:59,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:59,950 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-10-04 12:46:59,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 12:46:59,950 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-10-04 12:46:59,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 12:46:59,950 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:59,950 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-10-04 12:46:59,951 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:59,951 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:59,951 INFO L82 PathProgramCache]: Analyzing trace with hash -783456433, now seen corresponding path program 21 times [2018-10-04 12:46:59,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:59,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:59,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:59,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:59,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:00,711 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:00,763 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2018-10-04 12:47:00,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:00,764 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 [2018-10-04 12:47:00,772 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:47:00,881 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-04 12:47:00,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:00,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:01,011 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2018-10-04 12:47:01,034 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:01,034 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 12:47:01,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 12:47:01,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 12:47:01,034 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:01,035 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 24 states. [2018-10-04 12:47:01,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:01,150 INFO L93 Difference]: Finished difference Result 141 states and 144 transitions. [2018-10-04 12:47:01,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 12:47:01,154 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 90 [2018-10-04 12:47:01,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:01,156 INFO L225 Difference]: With dead ends: 141 [2018-10-04 12:47:01,156 INFO L226 Difference]: Without dead ends: 95 [2018-10-04 12:47:01,156 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 9 [2018-10-04 12:47:01,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-04 12:47:01,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-04 12:47:01,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-04 12:47:01,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-10-04 12:47:01,160 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 90 [2018-10-04 12:47:01,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:01,161 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-10-04 12:47:01,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 12:47:01,161 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-10-04 12:47:01,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-04 12:47:01,161 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:01,162 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2018-10-04 12:47:01,162 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:01,162 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:01,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1162366013, now seen corresponding path program 22 times [2018-10-04 12:47:01,162 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:01,162 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:01,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:01,163 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:01,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:01,626 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2018-10-04 12:47:01,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:01,713 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 [2018-10-04 12:47:01,720 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:47:01,760 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:47:01,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:01,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:01,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2018-10-04 12:47:01,927 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:01,927 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 12:47:01,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 12:47:01,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 12:47:01,928 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:01,928 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 25 states. [2018-10-04 12:47:02,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:02,013 INFO L93 Difference]: Finished difference Result 147 states and 150 transitions. [2018-10-04 12:47:02,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 12:47:02,019 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 94 [2018-10-04 12:47:02,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:02,021 INFO L225 Difference]: With dead ends: 147 [2018-10-04 12:47:02,021 INFO L226 Difference]: Without dead ends: 99 [2018-10-04 12:47:02,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 10 [2018-10-04 12:47:02,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-04 12:47:02,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-04 12:47:02,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-04 12:47:02,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-10-04 12:47:02,025 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 94 [2018-10-04 12:47:02,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:02,025 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-10-04 12:47:02,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 12:47:02,026 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-10-04 12:47:02,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 12:47:02,026 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:02,026 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-10-04 12:47:02,027 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:02,027 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:02,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1041909303, now seen corresponding path program 23 times [2018-10-04 12:47:02,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:02,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:02,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:02,028 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:02,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:02,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:02,337 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:02,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2018-10-04 12:47:02,413 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:02,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:47:02,422 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:47:02,591 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-04 12:47:02,591 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:02,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:02,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2018-10-04 12:47:02,728 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:02,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 12:47:02,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 12:47:02,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 12:47:02,729 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:02,729 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 26 states. [2018-10-04 12:47:02,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:02,818 INFO L93 Difference]: Finished difference Result 153 states and 156 transitions. [2018-10-04 12:47:02,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 12:47:02,819 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 98 [2018-10-04 12:47:02,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:02,820 INFO L225 Difference]: With dead ends: 153 [2018-10-04 12:47:02,820 INFO L226 Difference]: Without dead ends: 103 [2018-10-04 12:47:02,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 11 [2018-10-04 12:47:02,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-04 12:47:02,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-04 12:47:02,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-04 12:47:02,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-10-04 12:47:02,825 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 98 [2018-10-04 12:47:02,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:02,826 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-10-04 12:47:02,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 12:47:02,826 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-10-04 12:47:02,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-04 12:47:02,827 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:02,827 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2018-10-04 12:47:02,827 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:02,827 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:02,827 INFO L82 PathProgramCache]: Analyzing trace with hash -2122703189, now seen corresponding path program 24 times [2018-10-04 12:47:02,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:02,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:02,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:02,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:02,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:02,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:03,085 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:03,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2018-10-04 12:47:03,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:03,199 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 [2018-10-04 12:47:03,206 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:47:03,347 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 12:47:03,347 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:03,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:03,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2018-10-04 12:47:03,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:03,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 12:47:03,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 12:47:03,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 12:47:03,496 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:03,496 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 27 states. [2018-10-04 12:47:03,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:03,611 INFO L93 Difference]: Finished difference Result 159 states and 162 transitions. [2018-10-04 12:47:03,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 12:47:03,612 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 102 [2018-10-04 12:47:03,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:03,613 INFO L225 Difference]: With dead ends: 159 [2018-10-04 12:47:03,613 INFO L226 Difference]: Without dead ends: 107 [2018-10-04 12:47:03,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 12 [2018-10-04 12:47:03,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-04 12:47:03,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-04 12:47:03,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-04 12:47:03,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-10-04 12:47:03,617 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 102 [2018-10-04 12:47:03,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:03,618 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-10-04 12:47:03,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 12:47:03,618 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-10-04 12:47:03,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-04 12:47:03,619 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:03,619 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-10-04 12:47:03,619 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:03,619 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:03,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1705231073, now seen corresponding path program 25 times [2018-10-04 12:47:03,619 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:03,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:03,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:03,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:03,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:03,936 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:04,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2018-10-04 12:47:04,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:04,029 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 [2018-10-04 12:47:04,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:04,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:04,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:04,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2018-10-04 12:47:04,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:04,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 12:47:04,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 12:47:04,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 12:47:04,236 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:04,236 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 28 states. [2018-10-04 12:47:04,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:04,380 INFO L93 Difference]: Finished difference Result 165 states and 168 transitions. [2018-10-04 12:47:04,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 12:47:04,380 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2018-10-04 12:47:04,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:04,381 INFO L225 Difference]: With dead ends: 165 [2018-10-04 12:47:04,381 INFO L226 Difference]: Without dead ends: 111 [2018-10-04 12:47:04,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 13 [2018-10-04 12:47:04,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-04 12:47:04,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-04 12:47:04,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-04 12:47:04,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-10-04 12:47:04,387 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 106 [2018-10-04 12:47:04,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:04,387 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-10-04 12:47:04,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 12:47:04,387 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-10-04 12:47:04,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 12:47:04,388 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:04,388 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2018-10-04 12:47:04,388 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:04,388 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:04,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1304797587, now seen corresponding path program 26 times [2018-10-04 12:47:04,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:04,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:04,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:04,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:04,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:04,898 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:04,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2018-10-04 12:47:04,964 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:04,964 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:47:04,971 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:47:05,018 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:47:05,018 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:05,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:05,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2018-10-04 12:47:05,209 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:05,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 12:47:05,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 12:47:05,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 12:47:05,210 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:05,211 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 29 states. [2018-10-04 12:47:05,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:05,392 INFO L93 Difference]: Finished difference Result 171 states and 174 transitions. [2018-10-04 12:47:05,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 12:47:05,393 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 110 [2018-10-04 12:47:05,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:05,394 INFO L225 Difference]: With dead ends: 171 [2018-10-04 12:47:05,394 INFO L226 Difference]: Without dead ends: 115 [2018-10-04 12:47:05,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 14 [2018-10-04 12:47:05,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-04 12:47:05,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-04 12:47:05,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-04 12:47:05,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-10-04 12:47:05,399 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 110 [2018-10-04 12:47:05,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:05,399 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-10-04 12:47:05,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 12:47:05,400 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-10-04 12:47:05,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-04 12:47:05,400 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:05,400 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-10-04 12:47:05,401 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:05,401 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:05,401 INFO L82 PathProgramCache]: Analyzing trace with hash -801420281, now seen corresponding path program 27 times [2018-10-04 12:47:05,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:05,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:05,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:05,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:05,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:05,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:05,907 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:06,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2018-10-04 12:47:06,067 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:06,067 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 [2018-10-04 12:47:06,074 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:47:06,259 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-04 12:47:06,259 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:06,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2018-10-04 12:47:06,543 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:06,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 12:47:06,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 12:47:06,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 12:47:06,544 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:06,544 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 30 states. [2018-10-04 12:47:06,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:06,683 INFO L93 Difference]: Finished difference Result 177 states and 180 transitions. [2018-10-04 12:47:06,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 12:47:06,683 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 114 [2018-10-04 12:47:06,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:06,684 INFO L225 Difference]: With dead ends: 177 [2018-10-04 12:47:06,685 INFO L226 Difference]: Without dead ends: 119 [2018-10-04 12:47:06,685 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.4s impTime 15 [2018-10-04 12:47:06,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-04 12:47:06,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-04 12:47:06,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-04 12:47:06,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-10-04 12:47:06,689 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 114 [2018-10-04 12:47:06,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:06,690 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-10-04 12:47:06,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 12:47:06,690 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-10-04 12:47:06,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-04 12:47:06,691 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:06,691 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1] [2018-10-04 12:47:06,691 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:06,691 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:06,691 INFO L82 PathProgramCache]: Analyzing trace with hash -2050868101, now seen corresponding path program 28 times [2018-10-04 12:47:06,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:06,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:06,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:06,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:06,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:06,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:06,997 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:07,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2018-10-04 12:47:07,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:07,216 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 [2018-10-04 12:47:07,224 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:47:07,294 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:47:07,294 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:07,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:08,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2018-10-04 12:47:08,279 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:08,279 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 12:47:08,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 12:47:08,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 12:47:08,280 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:08,280 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 31 states. [2018-10-04 12:47:08,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:08,422 INFO L93 Difference]: Finished difference Result 183 states and 186 transitions. [2018-10-04 12:47:08,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 12:47:08,423 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 118 [2018-10-04 12:47:08,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:08,424 INFO L225 Difference]: With dead ends: 183 [2018-10-04 12:47:08,424 INFO L226 Difference]: Without dead ends: 123 [2018-10-04 12:47:08,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.3s impTime 16 [2018-10-04 12:47:08,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-04 12:47:08,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-04 12:47:08,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-04 12:47:08,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-10-04 12:47:08,430 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 118 [2018-10-04 12:47:08,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:08,430 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-10-04 12:47:08,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 12:47:08,430 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-10-04 12:47:08,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-04 12:47:08,430 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:08,431 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-10-04 12:47:08,431 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:08,431 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:08,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1042320657, now seen corresponding path program 29 times [2018-10-04 12:47:08,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:08,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:08,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:08,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:08,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:08,705 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2018-10-04 12:47:08,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:08,950 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 [2018-10-04 12:47:08,957 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:47:09,204 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-04 12:47:09,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:09,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:09,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2018-10-04 12:47:09,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:09,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 12:47:09,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 12:47:09,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 12:47:09,364 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:09,364 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 32 states. [2018-10-04 12:47:09,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:09,489 INFO L93 Difference]: Finished difference Result 189 states and 192 transitions. [2018-10-04 12:47:09,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 12:47:09,489 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 122 [2018-10-04 12:47:09,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:09,490 INFO L225 Difference]: With dead ends: 189 [2018-10-04 12:47:09,490 INFO L226 Difference]: Without dead ends: 127 [2018-10-04 12:47:09,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 17 [2018-10-04 12:47:09,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-04 12:47:09,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-04 12:47:09,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-04 12:47:09,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-10-04 12:47:09,496 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 122 [2018-10-04 12:47:09,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:09,496 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-10-04 12:47:09,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 12:47:09,496 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-10-04 12:47:09,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-04 12:47:09,497 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:09,497 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1] [2018-10-04 12:47:09,497 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:09,498 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:09,498 INFO L82 PathProgramCache]: Analyzing trace with hash -2020085917, now seen corresponding path program 30 times [2018-10-04 12:47:09,498 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:09,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:09,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:09,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:09,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:09,830 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-10-04 12:47:10,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:10,180 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 [2018-10-04 12:47:10,189 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:47:10,383 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-04 12:47:10,384 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:10,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:10,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-10-04 12:47:10,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:10,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-04 12:47:10,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 12:47:10,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 12:47:10,524 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:10,524 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 33 states. [2018-10-04 12:47:10,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:10,666 INFO L93 Difference]: Finished difference Result 195 states and 198 transitions. [2018-10-04 12:47:10,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 12:47:10,667 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 126 [2018-10-04 12:47:10,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:10,668 INFO L225 Difference]: With dead ends: 195 [2018-10-04 12:47:10,668 INFO L226 Difference]: Without dead ends: 131 [2018-10-04 12:47:10,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 18 [2018-10-04 12:47:10,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-04 12:47:10,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-04 12:47:10,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-04 12:47:10,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-10-04 12:47:10,673 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 126 [2018-10-04 12:47:10,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:10,674 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-10-04 12:47:10,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 12:47:10,674 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-10-04 12:47:10,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-04 12:47:10,675 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:10,675 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-10-04 12:47:10,675 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:10,675 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:10,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1232122327, now seen corresponding path program 31 times [2018-10-04 12:47:10,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:10,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:10,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:10,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:10,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:10,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:10,961 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:11,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2018-10-04 12:47:11,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:11,252 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:47:11,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:11,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2018-10-04 12:47:11,648 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:11,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 12:47:11,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 12:47:11,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 12:47:11,649 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:11,649 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 34 states. [2018-10-04 12:47:12,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:12,939 INFO L93 Difference]: Finished difference Result 201 states and 204 transitions. [2018-10-04 12:47:12,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 12:47:12,939 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 130 [2018-10-04 12:47:12,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:12,940 INFO L225 Difference]: With dead ends: 201 [2018-10-04 12:47:12,940 INFO L226 Difference]: Without dead ends: 135 [2018-10-04 12:47:12,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.3s impTime 19 [2018-10-04 12:47:12,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-04 12:47:12,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-10-04 12:47:12,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-04 12:47:12,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-10-04 12:47:12,947 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 130 [2018-10-04 12:47:12,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:12,948 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-10-04 12:47:12,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 12:47:12,949 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-10-04 12:47:12,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-04 12:47:12,949 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:12,949 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1] [2018-10-04 12:47:12,950 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:12,950 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:12,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1452361141, now seen corresponding path program 32 times [2018-10-04 12:47:12,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:12,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:12,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:12,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:12,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:13,606 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2018-10-04 12:47:13,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:13,949 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 [2018-10-04 12:47:13,956 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:47:14,010 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:47:14,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:14,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:14,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2018-10-04 12:47:14,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:14,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 12:47:14,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 12:47:14,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 12:47:14,152 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:14,153 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 35 states. [2018-10-04 12:47:14,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:14,285 INFO L93 Difference]: Finished difference Result 207 states and 210 transitions. [2018-10-04 12:47:14,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 12:47:14,285 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 134 [2018-10-04 12:47:14,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:14,287 INFO L225 Difference]: With dead ends: 207 [2018-10-04 12:47:14,287 INFO L226 Difference]: Without dead ends: 139 [2018-10-04 12:47:14,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 20 [2018-10-04 12:47:14,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-04 12:47:14,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-04 12:47:14,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-04 12:47:14,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-10-04 12:47:14,291 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 134 [2018-10-04 12:47:14,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:14,292 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-10-04 12:47:14,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 12:47:14,292 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-10-04 12:47:14,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-04 12:47:14,293 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:14,293 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-10-04 12:47:14,293 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:14,293 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:14,293 INFO L82 PathProgramCache]: Analyzing trace with hash 957810879, now seen corresponding path program 33 times [2018-10-04 12:47:14,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:14,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:14,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:14,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:14,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:14,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:14,710 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2018-10-04 12:47:15,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:15,085 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 [2018-10-04 12:47:15,092 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:47:15,395 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-04 12:47:15,395 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:15,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:15,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2018-10-04 12:47:15,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:15,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 12:47:15,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 12:47:15,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 12:47:15,563 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:15,563 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 36 states. [2018-10-04 12:47:15,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:15,710 INFO L93 Difference]: Finished difference Result 213 states and 216 transitions. [2018-10-04 12:47:15,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 12:47:15,710 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 138 [2018-10-04 12:47:15,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:15,711 INFO L225 Difference]: With dead ends: 213 [2018-10-04 12:47:15,712 INFO L226 Difference]: Without dead ends: 143 [2018-10-04 12:47:15,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 21 [2018-10-04 12:47:15,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-04 12:47:15,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-04 12:47:15,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-04 12:47:15,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2018-10-04 12:47:15,716 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 138 [2018-10-04 12:47:15,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:15,717 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2018-10-04 12:47:15,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 12:47:15,717 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2018-10-04 12:47:15,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-04 12:47:15,718 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:15,718 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1] [2018-10-04 12:47:15,718 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:15,718 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:15,718 INFO L82 PathProgramCache]: Analyzing trace with hash 963550515, now seen corresponding path program 34 times [2018-10-04 12:47:15,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:15,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:15,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:15,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:15,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:15,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:16,372 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:16,651 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:16,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2018-10-04 12:47:16,674 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:16,674 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 [2018-10-04 12:47:16,682 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:47:16,749 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:47:16,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:16,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:16,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2018-10-04 12:47:17,001 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:17,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 12:47:17,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 12:47:17,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 12:47:17,002 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:17,002 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 37 states. [2018-10-04 12:47:17,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:17,255 INFO L93 Difference]: Finished difference Result 219 states and 222 transitions. [2018-10-04 12:47:17,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 12:47:17,255 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 142 [2018-10-04 12:47:17,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:17,256 INFO L225 Difference]: With dead ends: 219 [2018-10-04 12:47:17,257 INFO L226 Difference]: Without dead ends: 147 [2018-10-04 12:47:17,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 7 [2018-10-04 12:47:17,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-04 12:47:17,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-04 12:47:17,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-04 12:47:17,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-10-04 12:47:17,262 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 142 [2018-10-04 12:47:17,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:17,262 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-10-04 12:47:17,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 12:47:17,262 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-10-04 12:47:17,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-04 12:47:17,263 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:17,263 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-10-04 12:47:17,263 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:17,264 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:17,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1526364071, now seen corresponding path program 35 times [2018-10-04 12:47:17,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:17,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:17,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:17,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:17,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:18,400 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:18,838 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:18,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2018-10-04 12:47:18,884 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:18,884 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 [2018-10-04 12:47:18,894 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:47:19,431 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-04 12:47:19,431 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:19,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2018-10-04 12:47:19,631 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:19,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 12:47:19,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 12:47:19,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 12:47:19,632 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:19,632 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 38 states. [2018-10-04 12:47:20,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:20,192 INFO L93 Difference]: Finished difference Result 225 states and 228 transitions. [2018-10-04 12:47:20,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 12:47:20,193 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 146 [2018-10-04 12:47:20,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:20,194 INFO L225 Difference]: With dead ends: 225 [2018-10-04 12:47:20,194 INFO L226 Difference]: Without dead ends: 151 [2018-10-04 12:47:20,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.2s impTime 8 [2018-10-04 12:47:20,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-04 12:47:20,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-04 12:47:20,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-04 12:47:20,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2018-10-04 12:47:20,199 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 146 [2018-10-04 12:47:20,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:20,200 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2018-10-04 12:47:20,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 12:47:20,200 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2018-10-04 12:47:20,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-04 12:47:20,201 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:20,201 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1] [2018-10-04 12:47:20,201 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:20,201 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:20,201 INFO L82 PathProgramCache]: Analyzing trace with hash 2109708315, now seen corresponding path program 36 times [2018-10-04 12:47:20,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:20,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:20,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:20,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:20,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:20,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:20,533 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:21,484 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2018-10-04 12:47:21,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:21,855 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 [2018-10-04 12:47:21,863 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:47:22,172 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-04 12:47:22,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:22,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:22,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2018-10-04 12:47:22,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:22,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-04 12:47:22,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 12:47:22,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 12:47:22,419 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:22,419 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 39 states. [2018-10-04 12:47:22,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:22,572 INFO L93 Difference]: Finished difference Result 231 states and 234 transitions. [2018-10-04 12:47:22,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 12:47:22,573 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 150 [2018-10-04 12:47:22,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:22,574 INFO L225 Difference]: With dead ends: 231 [2018-10-04 12:47:22,574 INFO L226 Difference]: Without dead ends: 155 [2018-10-04 12:47:22,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.2s impTime 9 [2018-10-04 12:47:22,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-04 12:47:22,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-04 12:47:22,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-04 12:47:22,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-10-04 12:47:22,578 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 150 [2018-10-04 12:47:22,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:22,579 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-10-04 12:47:22,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 12:47:22,579 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-10-04 12:47:22,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-04 12:47:22,580 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:22,580 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-10-04 12:47:22,580 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:22,580 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:22,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1900215951, now seen corresponding path program 37 times [2018-10-04 12:47:22,581 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:22,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:22,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:22,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:22,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:23,424 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:23,824 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:23,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2018-10-04 12:47:23,935 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:23,935 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:47:23,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:24,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2018-10-04 12:47:24,183 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:24,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 12:47:24,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 12:47:24,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 12:47:24,184 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:24,184 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 40 states. [2018-10-04 12:47:24,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:24,350 INFO L93 Difference]: Finished difference Result 237 states and 240 transitions. [2018-10-04 12:47:24,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 12:47:24,351 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 154 [2018-10-04 12:47:24,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:24,352 INFO L225 Difference]: With dead ends: 237 [2018-10-04 12:47:24,352 INFO L226 Difference]: Without dead ends: 159 [2018-10-04 12:47:24,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.0s impTime 10 [2018-10-04 12:47:24,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-04 12:47:24,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-10-04 12:47:24,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-04 12:47:24,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2018-10-04 12:47:24,357 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 154 [2018-10-04 12:47:24,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:24,358 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2018-10-04 12:47:24,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 12:47:24,358 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2018-10-04 12:47:24,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-04 12:47:24,358 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:24,359 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1] [2018-10-04 12:47:24,359 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:24,359 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:24,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1266046205, now seen corresponding path program 38 times [2018-10-04 12:47:24,359 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:24,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:24,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:24,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:24,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:24,733 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:25,327 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:25,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2018-10-04 12:47:25,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:25,380 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 [2018-10-04 12:47:25,388 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:47:25,451 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:47:25,451 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:25,454 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:26,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2018-10-04 12:47:26,666 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:26,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 12:47:26,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 12:47:26,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 12:47:26,667 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:26,667 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 41 states. [2018-10-04 12:47:27,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:27,100 INFO L93 Difference]: Finished difference Result 243 states and 246 transitions. [2018-10-04 12:47:27,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 12:47:27,100 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 158 [2018-10-04 12:47:27,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:27,101 INFO L225 Difference]: With dead ends: 243 [2018-10-04 12:47:27,102 INFO L226 Difference]: Without dead ends: 163 [2018-10-04 12:47:27,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 0.6s impTime 11 [2018-10-04 12:47:27,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-04 12:47:27,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-10-04 12:47:27,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-04 12:47:27,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-10-04 12:47:27,106 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 158 [2018-10-04 12:47:27,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:27,107 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-10-04 12:47:27,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 12:47:27,107 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-10-04 12:47:27,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-04 12:47:27,108 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:27,108 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-10-04 12:47:27,108 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:27,108 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:27,108 INFO L82 PathProgramCache]: Analyzing trace with hash 907582839, now seen corresponding path program 39 times [2018-10-04 12:47:27,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:27,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:27,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:27,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:27,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:27,889 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:28,284 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:28,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2018-10-04 12:47:28,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:28,465 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 [2018-10-04 12:47:28,472 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:47:28,954 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-04 12:47:28,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:28,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:29,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2018-10-04 12:47:29,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:29,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 12:47:29,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 12:47:29,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 12:47:29,124 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:29,124 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 42 states. [2018-10-04 12:47:29,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:29,438 INFO L93 Difference]: Finished difference Result 249 states and 252 transitions. [2018-10-04 12:47:29,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 12:47:29,438 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 162 [2018-10-04 12:47:29,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:29,440 INFO L225 Difference]: With dead ends: 249 [2018-10-04 12:47:29,440 INFO L226 Difference]: Without dead ends: 167 [2018-10-04 12:47:29,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.0s impTime 12 [2018-10-04 12:47:29,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-04 12:47:29,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-10-04 12:47:29,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-04 12:47:29,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2018-10-04 12:47:29,445 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 162 [2018-10-04 12:47:29,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:29,445 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2018-10-04 12:47:29,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 12:47:29,445 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2018-10-04 12:47:29,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-04 12:47:29,446 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:29,446 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1] [2018-10-04 12:47:29,447 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:29,447 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:29,447 INFO L82 PathProgramCache]: Analyzing trace with hash 334812651, now seen corresponding path program 40 times [2018-10-04 12:47:29,447 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:29,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:29,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:29,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:29,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:29,706 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:30,097 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:30,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2018-10-04 12:47:30,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:30,190 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 [2018-10-04 12:47:30,197 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:47:30,269 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:47:30,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:30,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:30,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2018-10-04 12:47:30,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:30,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 12:47:30,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 12:47:30,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 12:47:30,500 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:30,500 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 43 states. [2018-10-04 12:47:30,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:30,848 INFO L93 Difference]: Finished difference Result 255 states and 258 transitions. [2018-10-04 12:47:30,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 12:47:30,849 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 166 [2018-10-04 12:47:30,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:30,850 INFO L225 Difference]: With dead ends: 255 [2018-10-04 12:47:30,850 INFO L226 Difference]: Without dead ends: 171 [2018-10-04 12:47:30,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 13 [2018-10-04 12:47:30,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-04 12:47:30,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-10-04 12:47:30,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-04 12:47:30,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-10-04 12:47:30,854 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 166 [2018-10-04 12:47:30,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:30,854 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-10-04 12:47:30,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 12:47:30,854 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-10-04 12:47:30,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-04 12:47:30,855 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:30,855 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1] [2018-10-04 12:47:30,855 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:30,855 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:30,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1537430623, now seen corresponding path program 41 times [2018-10-04 12:47:30,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:30,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:30,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:30,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:30,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:31,847 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:32,467 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2018-10-04 12:47:32,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:32,731 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 [2018-10-04 12:47:32,750 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:47:33,536 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-04 12:47:33,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:33,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:33,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2018-10-04 12:47:33,985 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:33,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 12:47:33,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 12:47:33,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 12:47:33,986 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:33,986 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 44 states. [2018-10-04 12:47:34,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:34,185 INFO L93 Difference]: Finished difference Result 261 states and 264 transitions. [2018-10-04 12:47:34,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 12:47:34,185 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 170 [2018-10-04 12:47:34,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:34,187 INFO L225 Difference]: With dead ends: 261 [2018-10-04 12:47:34,187 INFO L226 Difference]: Without dead ends: 175 [2018-10-04 12:47:34,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.4s impTime 14 [2018-10-04 12:47:34,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-04 12:47:34,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-10-04 12:47:34,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-04 12:47:34,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2018-10-04 12:47:34,192 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 170 [2018-10-04 12:47:34,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:34,192 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2018-10-04 12:47:34,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 12:47:34,193 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2018-10-04 12:47:34,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-04 12:47:34,193 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:34,194 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1, 1, 1] [2018-10-04 12:47:34,194 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:34,194 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:34,194 INFO L82 PathProgramCache]: Analyzing trace with hash -903276333, now seen corresponding path program 42 times [2018-10-04 12:47:34,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:34,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:34,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:34,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:34,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:34,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:34,474 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:34,662 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:34,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2018-10-04 12:47:34,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:34,842 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 [2018-10-04 12:47:34,852 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:47:35,322 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-04 12:47:35,322 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:35,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:35,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2018-10-04 12:47:35,519 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:35,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-04 12:47:35,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 12:47:35,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 12:47:35,520 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:35,520 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand 45 states. [2018-10-04 12:47:35,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:35,698 INFO L93 Difference]: Finished difference Result 267 states and 270 transitions. [2018-10-04 12:47:35,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 12:47:35,698 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 174 [2018-10-04 12:47:35,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:35,699 INFO L225 Difference]: With dead ends: 267 [2018-10-04 12:47:35,700 INFO L226 Difference]: Without dead ends: 179 [2018-10-04 12:47:35,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 15 [2018-10-04 12:47:35,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-04 12:47:35,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-10-04 12:47:35,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-04 12:47:35,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2018-10-04 12:47:35,704 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 174 [2018-10-04 12:47:35,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:35,704 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2018-10-04 12:47:35,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 12:47:35,704 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2018-10-04 12:47:35,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-04 12:47:35,705 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:35,705 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1] [2018-10-04 12:47:35,705 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:35,706 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:35,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1945427129, now seen corresponding path program 43 times [2018-10-04 12:47:35,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:35,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:35,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:35,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:35,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:35,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:36,075 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:36,675 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2018-10-04 12:47:37,066 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:37,067 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 [2018-10-04 12:47:37,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:37,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:37,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2018-10-04 12:47:37,479 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:37,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 12:47:37,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 12:47:37,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 12:47:37,480 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:37,481 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 46 states. [2018-10-04 12:47:37,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:37,682 INFO L93 Difference]: Finished difference Result 273 states and 276 transitions. [2018-10-04 12:47:37,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 12:47:37,682 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 178 [2018-10-04 12:47:37,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:37,683 INFO L225 Difference]: With dead ends: 273 [2018-10-04 12:47:37,684 INFO L226 Difference]: Without dead ends: 183 [2018-10-04 12:47:37,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 0.7s impTime 16 [2018-10-04 12:47:37,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-04 12:47:37,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-10-04 12:47:37,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-04 12:47:37,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2018-10-04 12:47:37,688 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 178 [2018-10-04 12:47:37,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:37,688 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2018-10-04 12:47:37,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 12:47:37,688 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2018-10-04 12:47:37,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-04 12:47:37,689 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:37,689 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 1, 1, 1, 1] [2018-10-04 12:47:37,689 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:37,689 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:37,689 INFO L82 PathProgramCache]: Analyzing trace with hash -45190213, now seen corresponding path program 44 times [2018-10-04 12:47:37,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:37,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:37,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:37,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:37,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:39,593 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:39,989 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-10-04 12:47:40,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:40,123 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 [2018-10-04 12:47:40,130 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:47:40,205 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:47:40,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:40,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:40,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-10-04 12:47:40,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:40,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 12:47:40,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 12:47:40,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 12:47:40,406 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:40,406 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand 47 states. [2018-10-04 12:47:40,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:40,615 INFO L93 Difference]: Finished difference Result 279 states and 282 transitions. [2018-10-04 12:47:40,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 12:47:40,616 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 182 [2018-10-04 12:47:40,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:40,617 INFO L225 Difference]: With dead ends: 279 [2018-10-04 12:47:40,617 INFO L226 Difference]: Without dead ends: 187 [2018-10-04 12:47:40,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 1.8s impTime 17 [2018-10-04 12:47:40,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-04 12:47:40,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-10-04 12:47:40,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-04 12:47:40,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2018-10-04 12:47:40,624 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 182 [2018-10-04 12:47:40,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:40,624 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2018-10-04 12:47:40,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 12:47:40,624 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2018-10-04 12:47:40,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-04 12:47:40,625 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:40,626 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1] [2018-10-04 12:47:40,626 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:40,626 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:40,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1769474607, now seen corresponding path program 45 times [2018-10-04 12:47:40,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:40,627 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:40,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:40,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:40,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:40,995 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:41,170 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:41,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 2070 trivial. 0 not checked. [2018-10-04 12:47:41,386 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:41,386 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:47:41,396 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:47:42,335 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-04 12:47:42,335 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:42,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 2070 trivial. 0 not checked. [2018-10-04 12:47:42,740 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:42,740 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 12:47:42,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 12:47:42,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 12:47:42,741 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:42,741 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 48 states. [2018-10-04 12:47:42,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:42,953 INFO L93 Difference]: Finished difference Result 285 states and 288 transitions. [2018-10-04 12:47:42,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 12:47:42,954 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 186 [2018-10-04 12:47:42,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:42,955 INFO L225 Difference]: With dead ends: 285 [2018-10-04 12:47:42,955 INFO L226 Difference]: Without dead ends: 191 [2018-10-04 12:47:42,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.5s impTime 18 [2018-10-04 12:47:42,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-04 12:47:42,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-10-04 12:47:42,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-04 12:47:42,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2018-10-04 12:47:42,962 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 186 [2018-10-04 12:47:42,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:42,963 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2018-10-04 12:47:42,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 12:47:42,963 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2018-10-04 12:47:42,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-04 12:47:42,964 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:42,964 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 1, 1, 1, 1] [2018-10-04 12:47:42,964 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:42,965 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:42,965 INFO L82 PathProgramCache]: Analyzing trace with hash -879958365, now seen corresponding path program 46 times [2018-10-04 12:47:42,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:42,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:42,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:42,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:42,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:43,940 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:44,302 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2018-10-04 12:47:44,425 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:44,426 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 [2018-10-04 12:47:44,433 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:47:44,505 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:47:44,505 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:44,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:44,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2018-10-04 12:47:44,718 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:44,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-04 12:47:44,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 12:47:44,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 12:47:44,719 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:44,719 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand 49 states. [2018-10-04 12:47:44,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:44,947 INFO L93 Difference]: Finished difference Result 291 states and 294 transitions. [2018-10-04 12:47:44,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 12:47:44,948 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 190 [2018-10-04 12:47:44,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:44,949 INFO L225 Difference]: With dead ends: 291 [2018-10-04 12:47:44,950 INFO L226 Difference]: Without dead ends: 195 [2018-10-04 12:47:44,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.0s impTime 19 [2018-10-04 12:47:44,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-04 12:47:44,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-10-04 12:47:44,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-04 12:47:44,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2018-10-04 12:47:44,955 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 190 [2018-10-04 12:47:44,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:44,955 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2018-10-04 12:47:44,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 12:47:44,955 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2018-10-04 12:47:44,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-04 12:47:44,956 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:44,957 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1] [2018-10-04 12:47:44,957 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:44,957 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:44,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1911420649, now seen corresponding path program 47 times [2018-10-04 12:47:44,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:44,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:44,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:44,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:44,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:45,210 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:45,565 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:45,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2018-10-04 12:47:45,994 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:45,994 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:47:46,002 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:47:47,073 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-04 12:47:47,073 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:47,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2018-10-04 12:47:47,664 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:47,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 12:47:47,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 12:47:47,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 12:47:47,665 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:47,665 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 50 states. [2018-10-04 12:47:47,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:47,927 INFO L93 Difference]: Finished difference Result 297 states and 300 transitions. [2018-10-04 12:47:47,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 12:47:47,928 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 194 [2018-10-04 12:47:47,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:47,929 INFO L225 Difference]: With dead ends: 297 [2018-10-04 12:47:47,929 INFO L226 Difference]: Without dead ends: 199 [2018-10-04 12:47:47,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.8s impTime 20 [2018-10-04 12:47:47,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-04 12:47:47,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-10-04 12:47:47,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-04 12:47:47,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2018-10-04 12:47:47,935 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 194 [2018-10-04 12:47:47,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:47,935 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2018-10-04 12:47:47,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 12:47:47,935 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2018-10-04 12:47:47,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-04 12:47:47,936 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:47,936 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 1, 1, 1, 1] [2018-10-04 12:47:47,936 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:47,936 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:47,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1259106699, now seen corresponding path program 48 times [2018-10-04 12:47:47,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:47,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:47,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:47,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:47,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:48,760 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:49,111 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:49,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2018-10-04 12:47:49,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:49,598 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:47:49,605 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:47:50,333 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-04 12:47:50,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:50,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2018-10-04 12:47:50,543 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:50,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-04 12:47:50,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 12:47:50,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 12:47:50,544 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:50,544 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand 51 states. [2018-10-04 12:47:50,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:50,840 INFO L93 Difference]: Finished difference Result 303 states and 306 transitions. [2018-10-04 12:47:50,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 12:47:50,841 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 198 [2018-10-04 12:47:50,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:50,842 INFO L225 Difference]: With dead ends: 303 [2018-10-04 12:47:50,842 INFO L226 Difference]: Without dead ends: 203 [2018-10-04 12:47:50,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.2s impTime 21 [2018-10-04 12:47:50,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-04 12:47:50,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-10-04 12:47:50,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-04 12:47:50,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2018-10-04 12:47:50,849 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 198 [2018-10-04 12:47:50,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:50,849 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2018-10-04 12:47:50,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 12:47:50,849 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2018-10-04 12:47:50,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-04 12:47:50,850 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:50,850 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1, 1, 1] [2018-10-04 12:47:50,850 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:50,850 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:50,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1946083329, now seen corresponding path program 49 times [2018-10-04 12:47:50,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:50,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:50,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:50,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:50,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:50,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:51,164 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:51,464 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:51,757 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2018-10-04 12:47:51,779 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:51,779 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:47:51,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:51,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:52,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2018-10-04 12:47:52,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:52,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 12:47:52,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 12:47:52,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 12:47:52,064 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:52,064 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand 52 states. [2018-10-04 12:47:52,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:52,341 INFO L93 Difference]: Finished difference Result 309 states and 312 transitions. [2018-10-04 12:47:52,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 12:47:52,342 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 202 [2018-10-04 12:47:52,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:52,343 INFO L225 Difference]: With dead ends: 309 [2018-10-04 12:47:52,344 INFO L226 Difference]: Without dead ends: 207 [2018-10-04 12:47:52,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 7 [2018-10-04 12:47:52,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-10-04 12:47:52,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-10-04 12:47:52,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-10-04 12:47:52,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2018-10-04 12:47:52,349 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 202 [2018-10-04 12:47:52,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:52,349 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2018-10-04 12:47:52,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 12:47:52,349 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2018-10-04 12:47:52,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-04 12:47:52,350 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:52,351 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 1, 1, 1, 1] [2018-10-04 12:47:52,351 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:52,351 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:52,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1980427149, now seen corresponding path program 50 times [2018-10-04 12:47:52,351 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:52,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:52,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:52,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:52,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:52,725 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:52,921 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:53,365 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:53,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2018-10-04 12:47:53,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:53,434 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 [2018-10-04 12:47:53,442 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:47:53,525 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:47:53,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:53,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:53,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2018-10-04 12:47:53,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:53,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 12:47:53,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 12:47:53,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 12:47:53,797 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:53,797 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand 53 states. [2018-10-04 12:47:55,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:55,130 INFO L93 Difference]: Finished difference Result 315 states and 318 transitions. [2018-10-04 12:47:55,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 12:47:55,131 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 206 [2018-10-04 12:47:55,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:55,132 INFO L225 Difference]: With dead ends: 315 [2018-10-04 12:47:55,132 INFO L226 Difference]: Without dead ends: 211 [2018-10-04 12:47:55,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.8s impTime 8 [2018-10-04 12:47:55,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-04 12:47:55,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-10-04 12:47:55,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-10-04 12:47:55,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 212 transitions. [2018-10-04 12:47:55,138 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 212 transitions. Word has length 206 [2018-10-04 12:47:55,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:55,138 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 212 transitions. [2018-10-04 12:47:55,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 12:47:55,139 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 212 transitions. [2018-10-04 12:47:55,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-10-04 12:47:55,140 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:55,140 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 1, 1, 1, 1] [2018-10-04 12:47:55,140 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:55,140 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:55,140 INFO L82 PathProgramCache]: Analyzing trace with hash -311603481, now seen corresponding path program 51 times [2018-10-04 12:47:55,140 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:55,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:55,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:55,141 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:55,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:55,530 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:55,830 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:56,050 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:56,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 2652 trivial. 0 not checked. [2018-10-04 12:47:56,113 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:56,113 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 [2018-10-04 12:47:56,120 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:47:57,285 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-04 12:47:57,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:57,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:58,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 2652 trivial. 0 not checked. [2018-10-04 12:47:58,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:58,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 12:47:58,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 12:47:58,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 12:47:58,439 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:58,439 INFO L87 Difference]: Start difference. First operand 211 states and 212 transitions. Second operand 54 states. [2018-10-04 12:47:58,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:58,771 INFO L93 Difference]: Finished difference Result 321 states and 324 transitions. [2018-10-04 12:47:58,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 12:47:58,772 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 210 [2018-10-04 12:47:58,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:58,773 INFO L225 Difference]: With dead ends: 321 [2018-10-04 12:47:58,773 INFO L226 Difference]: Without dead ends: 215 [2018-10-04 12:47:58,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 0.6s impTime 9 [2018-10-04 12:47:58,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-10-04 12:47:58,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-10-04 12:47:58,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-10-04 12:47:58,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 216 transitions. [2018-10-04 12:47:58,778 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 216 transitions. Word has length 210 [2018-10-04 12:47:58,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:58,779 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 216 transitions. [2018-10-04 12:47:58,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 12:47:58,779 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 216 transitions. [2018-10-04 12:47:58,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-10-04 12:47:58,780 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:58,780 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 52, 1, 1, 1, 1] [2018-10-04 12:47:58,780 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:58,780 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:58,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1905340581, now seen corresponding path program 52 times [2018-10-04 12:47:58,781 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:58,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:58,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:58,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:58,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:58,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:59,090 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:59,450 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:00,002 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:00,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5512 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 2756 trivial. 0 not checked. [2018-10-04 12:48:00,160 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:00,160 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 [2018-10-04 12:48:00,167 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:48:00,255 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:48:00,255 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:00,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:00,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5512 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 2756 trivial. 0 not checked. [2018-10-04 12:48:00,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:00,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 12:48:00,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 12:48:00,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 12:48:00,491 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:00,491 INFO L87 Difference]: Start difference. First operand 215 states and 216 transitions. Second operand 55 states. [2018-10-04 12:48:00,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:00,828 INFO L93 Difference]: Finished difference Result 327 states and 330 transitions. [2018-10-04 12:48:00,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 12:48:00,828 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 214 [2018-10-04 12:48:00,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:00,830 INFO L225 Difference]: With dead ends: 327 [2018-10-04 12:48:00,830 INFO L226 Difference]: Without dead ends: 219 [2018-10-04 12:48:00,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.0s impTime 10 [2018-10-04 12:48:00,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-04 12:48:00,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-10-04 12:48:00,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-10-04 12:48:00,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 220 transitions. [2018-10-04 12:48:00,835 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 220 transitions. Word has length 214 [2018-10-04 12:48:00,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:00,835 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 220 transitions. [2018-10-04 12:48:00,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 12:48:00,835 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 220 transitions. [2018-10-04 12:48:00,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-04 12:48:00,836 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:00,836 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 53, 53, 1, 1, 1, 1] [2018-10-04 12:48:00,836 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:00,837 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:00,837 INFO L82 PathProgramCache]: Analyzing trace with hash 880711119, now seen corresponding path program 53 times [2018-10-04 12:48:00,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:00,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:00,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:00,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:00,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:00,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:01,117 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:01,449 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:01,997 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:02,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2018-10-04 12:48:02,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:02,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:48:02,209 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:48:03,996 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-04 12:48:03,996 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:04,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:04,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2018-10-04 12:48:04,302 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:04,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 12:48:04,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 12:48:04,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 12:48:04,303 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:04,303 INFO L87 Difference]: Start difference. First operand 219 states and 220 transitions. Second operand 56 states. [2018-10-04 12:48:04,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:04,642 INFO L93 Difference]: Finished difference Result 333 states and 336 transitions. [2018-10-04 12:48:04,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 12:48:04,643 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 218 [2018-10-04 12:48:04,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:04,644 INFO L225 Difference]: With dead ends: 333 [2018-10-04 12:48:04,644 INFO L226 Difference]: Without dead ends: 223 [2018-10-04 12:48:04,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.0s impTime 11 [2018-10-04 12:48:04,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-10-04 12:48:04,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-10-04 12:48:04,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-10-04 12:48:04,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 224 transitions. [2018-10-04 12:48:04,649 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 224 transitions. Word has length 218 [2018-10-04 12:48:04,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:04,649 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 224 transitions. [2018-10-04 12:48:04,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 12:48:04,649 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 224 transitions. [2018-10-04 12:48:04,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-10-04 12:48:04,650 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:04,650 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 54, 54, 1, 1, 1, 1] [2018-10-04 12:48:04,650 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:04,651 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:04,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1453433411, now seen corresponding path program 54 times [2018-10-04 12:48:04,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:04,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:04,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:04,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:04,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:04,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:05,147 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:05,502 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:05,683 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:05,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-10-04 12:48:05,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:05,800 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 [2018-10-04 12:48:05,807 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:48:06,705 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-04 12:48:06,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:06,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:06,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-10-04 12:48:06,927 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:06,927 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-04 12:48:06,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 12:48:06,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 12:48:06,928 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:06,928 INFO L87 Difference]: Start difference. First operand 223 states and 224 transitions. Second operand 57 states. [2018-10-04 12:48:07,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:07,236 INFO L93 Difference]: Finished difference Result 339 states and 342 transitions. [2018-10-04 12:48:07,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 12:48:07,237 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 222 [2018-10-04 12:48:07,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:07,238 INFO L225 Difference]: With dead ends: 339 [2018-10-04 12:48:07,238 INFO L226 Difference]: Without dead ends: 227 [2018-10-04 12:48:07,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime 12 [2018-10-04 12:48:07,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-10-04 12:48:07,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-10-04 12:48:07,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-10-04 12:48:07,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 228 transitions. [2018-10-04 12:48:07,246 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 228 transitions. Word has length 222 [2018-10-04 12:48:07,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:07,246 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 228 transitions. [2018-10-04 12:48:07,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 12:48:07,247 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 228 transitions. [2018-10-04 12:48:07,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-10-04 12:48:07,248 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:07,248 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 55, 55, 1, 1, 1, 1] [2018-10-04 12:48:07,248 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:07,248 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:07,249 INFO L82 PathProgramCache]: Analyzing trace with hash -614665033, now seen corresponding path program 55 times [2018-10-04 12:48:07,249 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:07,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:07,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:07,249 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:07,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:07,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:07,763 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:08,161 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:08,536 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:08,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-10-04 12:48:08,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:08,840 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 [2018-10-04 12:48:08,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:48:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:08,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:09,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-10-04 12:48:09,197 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:09,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 12:48:09,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 12:48:09,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 12:48:09,198 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:09,198 INFO L87 Difference]: Start difference. First operand 227 states and 228 transitions. Second operand 58 states. [2018-10-04 12:48:09,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:09,540 INFO L93 Difference]: Finished difference Result 345 states and 348 transitions. [2018-10-04 12:48:09,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 12:48:09,540 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 226 [2018-10-04 12:48:09,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:09,542 INFO L225 Difference]: With dead ends: 345 [2018-10-04 12:48:09,542 INFO L226 Difference]: Without dead ends: 231 [2018-10-04 12:48:09,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.2s impTime 13 [2018-10-04 12:48:09,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-10-04 12:48:09,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-10-04 12:48:09,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-10-04 12:48:09,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions. [2018-10-04 12:48:09,549 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 226 [2018-10-04 12:48:09,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:09,549 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 232 transitions. [2018-10-04 12:48:09,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 12:48:09,549 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions. [2018-10-04 12:48:09,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-10-04 12:48:09,550 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:09,551 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 56, 56, 1, 1, 1, 1] [2018-10-04 12:48:09,551 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:09,551 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:09,551 INFO L82 PathProgramCache]: Analyzing trace with hash -659190485, now seen corresponding path program 56 times [2018-10-04 12:48:09,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:09,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:09,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:09,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:48:09,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:09,906 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:10,301 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:10,590 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:10,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2018-10-04 12:48:10,941 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:10,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:48:10,949 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:48:11,047 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:48:11,047 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:11,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2018-10-04 12:48:11,343 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:11,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-04 12:48:11,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 12:48:11,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 12:48:11,345 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:11,345 INFO L87 Difference]: Start difference. First operand 231 states and 232 transitions. Second operand 59 states. [2018-10-04 12:48:11,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:11,742 INFO L93 Difference]: Finished difference Result 351 states and 354 transitions. [2018-10-04 12:48:11,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 12:48:11,742 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 230 [2018-10-04 12:48:11,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:11,744 INFO L225 Difference]: With dead ends: 351 [2018-10-04 12:48:11,744 INFO L226 Difference]: Without dead ends: 235 [2018-10-04 12:48:11,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.0s impTime 14 [2018-10-04 12:48:11,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-10-04 12:48:11,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-10-04 12:48:11,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-10-04 12:48:11,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions. [2018-10-04 12:48:11,749 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 230 [2018-10-04 12:48:11,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:11,749 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 236 transitions. [2018-10-04 12:48:11,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 12:48:11,749 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions. [2018-10-04 12:48:11,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-10-04 12:48:11,750 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:11,750 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 57, 57, 1, 1, 1, 1] [2018-10-04 12:48:11,750 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:11,751 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:11,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1412459423, now seen corresponding path program 57 times [2018-10-04 12:48:11,751 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:11,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:11,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:11,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:11,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:11,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:11,975 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:12,204 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:12,652 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:13,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 3306 trivial. 0 not checked. [2018-10-04 12:48:13,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:13,234 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:48:13,241 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:48:15,001 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-04 12:48:15,001 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:15,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:15,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 3306 trivial. 0 not checked. [2018-10-04 12:48:15,257 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:15,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-04 12:48:15,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 12:48:15,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 12:48:15,258 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:15,258 INFO L87 Difference]: Start difference. First operand 235 states and 236 transitions. Second operand 60 states. [2018-10-04 12:48:15,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:15,655 INFO L93 Difference]: Finished difference Result 357 states and 360 transitions. [2018-10-04 12:48:15,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 12:48:15,655 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 234 [2018-10-04 12:48:15,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:15,656 INFO L225 Difference]: With dead ends: 357 [2018-10-04 12:48:15,656 INFO L226 Difference]: Without dead ends: 239 [2018-10-04 12:48:15,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.2s impTime 15 [2018-10-04 12:48:15,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-10-04 12:48:15,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2018-10-04 12:48:15,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-10-04 12:48:15,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 240 transitions. [2018-10-04 12:48:15,660 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 240 transitions. Word has length 234 [2018-10-04 12:48:15,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:15,660 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 240 transitions. [2018-10-04 12:48:15,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 12:48:15,660 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 240 transitions. [2018-10-04 12:48:15,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-10-04 12:48:15,661 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:15,661 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 58, 58, 1, 1, 1, 1] [2018-10-04 12:48:15,662 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:15,662 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:15,662 INFO L82 PathProgramCache]: Analyzing trace with hash 47353875, now seen corresponding path program 58 times [2018-10-04 12:48:15,662 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:15,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:15,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:15,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:15,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:15,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:15,928 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:16,064 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:16,312 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:16,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2018-10-04 12:48:16,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:16,469 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 [2018-10-04 12:48:16,478 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:48:16,572 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:48:16,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:16,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2018-10-04 12:48:16,803 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:16,803 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-04 12:48:16,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-04 12:48:16,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-04 12:48:16,804 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:16,804 INFO L87 Difference]: Start difference. First operand 239 states and 240 transitions. Second operand 61 states. [2018-10-04 12:48:17,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:17,184 INFO L93 Difference]: Finished difference Result 363 states and 366 transitions. [2018-10-04 12:48:17,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 12:48:17,185 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 238 [2018-10-04 12:48:17,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:17,186 INFO L225 Difference]: With dead ends: 363 [2018-10-04 12:48:17,186 INFO L226 Difference]: Without dead ends: 243 [2018-10-04 12:48:17,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 14 [2018-10-04 12:48:17,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-10-04 12:48:17,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2018-10-04 12:48:17,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-10-04 12:48:17,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 244 transitions. [2018-10-04 12:48:17,191 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 244 transitions. Word has length 238 [2018-10-04 12:48:17,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:17,191 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 244 transitions. [2018-10-04 12:48:17,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-04 12:48:17,191 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 244 transitions. [2018-10-04 12:48:17,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-10-04 12:48:17,192 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:17,193 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 59, 59, 1, 1, 1, 1] [2018-10-04 12:48:17,193 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:17,193 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:17,193 INFO L82 PathProgramCache]: Analyzing trace with hash 153156231, now seen corresponding path program 59 times [2018-10-04 12:48:17,193 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:17,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:17,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:17,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:17,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:17,792 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:18,109 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:18,508 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:18,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2018-10-04 12:48:18,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:18,600 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 [2018-10-04 12:48:18,607 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:48:21,199 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-04 12:48:21,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:21,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2018-10-04 12:48:21,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:21,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-04 12:48:21,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 12:48:21,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 12:48:21,487 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:21,487 INFO L87 Difference]: Start difference. First operand 243 states and 244 transitions. Second operand 62 states. [2018-10-04 12:48:21,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:21,907 INFO L93 Difference]: Finished difference Result 369 states and 372 transitions. [2018-10-04 12:48:21,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 12:48:21,907 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 242 [2018-10-04 12:48:21,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:21,909 INFO L225 Difference]: With dead ends: 369 [2018-10-04 12:48:21,909 INFO L226 Difference]: Without dead ends: 247 [2018-10-04 12:48:21,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 0.9s impTime 17 [2018-10-04 12:48:21,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-10-04 12:48:21,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2018-10-04 12:48:21,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-10-04 12:48:21,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 248 transitions. [2018-10-04 12:48:21,915 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 248 transitions. Word has length 242 [2018-10-04 12:48:21,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:21,915 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 248 transitions. [2018-10-04 12:48:21,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 12:48:21,916 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 248 transitions. [2018-10-04 12:48:21,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-10-04 12:48:21,917 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:21,917 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 60, 60, 1, 1, 1, 1] [2018-10-04 12:48:21,917 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:21,917 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:21,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1155486981, now seen corresponding path program 60 times [2018-10-04 12:48:21,918 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:21,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:21,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:21,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:21,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:21,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:22,136 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:22,365 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:22,530 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:22,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 3660 trivial. 0 not checked. [2018-10-04 12:48:22,673 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:22,673 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 [2018-10-04 12:48:22,681 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:48:24,178 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-04 12:48:24,178 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:24,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:24,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 3660 trivial. 0 not checked. [2018-10-04 12:48:24,448 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:24,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-04 12:48:24,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-04 12:48:24,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-04 12:48:24,449 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:24,449 INFO L87 Difference]: Start difference. First operand 247 states and 248 transitions. Second operand 63 states. [2018-10-04 12:48:24,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:24,857 INFO L93 Difference]: Finished difference Result 375 states and 378 transitions. [2018-10-04 12:48:24,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 12:48:24,857 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 246 [2018-10-04 12:48:24,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:24,858 INFO L225 Difference]: With dead ends: 375 [2018-10-04 12:48:24,858 INFO L226 Difference]: Without dead ends: 251 [2018-10-04 12:48:24,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.4s impTime 18 [2018-10-04 12:48:24,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-10-04 12:48:24,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-10-04 12:48:24,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-10-04 12:48:24,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 252 transitions. [2018-10-04 12:48:24,863 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 252 transitions. Word has length 246 [2018-10-04 12:48:24,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:24,863 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 252 transitions. [2018-10-04 12:48:24,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-04 12:48:24,864 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 252 transitions. [2018-10-04 12:48:24,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-10-04 12:48:24,864 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:24,865 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 61, 61, 1, 1, 1, 1] [2018-10-04 12:48:24,865 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:24,865 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:24,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1549181295, now seen corresponding path program 61 times [2018-10-04 12:48:24,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:24,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:24,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:24,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:24,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:24,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:25,247 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:25,473 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:25,809 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:26,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2018-10-04 12:48:26,147 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:26,147 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 [2018-10-04 12:48:26,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:48:26,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:26,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:26,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2018-10-04 12:48:26,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:26,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-04 12:48:26,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 12:48:26,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 12:48:26,500 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:26,500 INFO L87 Difference]: Start difference. First operand 251 states and 252 transitions. Second operand 64 states. [2018-10-04 12:48:27,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:27,055 INFO L93 Difference]: Finished difference Result 381 states and 384 transitions. [2018-10-04 12:48:27,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 12:48:27,055 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 250 [2018-10-04 12:48:27,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:27,057 INFO L225 Difference]: With dead ends: 381 [2018-10-04 12:48:27,057 INFO L226 Difference]: Without dead ends: 255 [2018-10-04 12:48:27,057 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.9s impTime 19 [2018-10-04 12:48:27,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-10-04 12:48:27,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2018-10-04 12:48:27,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-10-04 12:48:27,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 256 transitions. [2018-10-04 12:48:27,062 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 256 transitions. Word has length 250 [2018-10-04 12:48:27,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:27,062 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 256 transitions. [2018-10-04 12:48:27,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 12:48:27,062 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 256 transitions. [2018-10-04 12:48:27,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-10-04 12:48:27,063 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:27,063 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 62, 62, 1, 1, 1, 1] [2018-10-04 12:48:27,063 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:27,063 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:27,063 INFO L82 PathProgramCache]: Analyzing trace with hash -540549661, now seen corresponding path program 62 times [2018-10-04 12:48:27,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:27,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:27,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:27,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:48:27,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:27,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:27,259 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:27,471 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:27,613 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2018-10-04 12:48:27,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:27,804 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 [2018-10-04 12:48:27,813 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:48:27,914 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:48:27,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:27,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:28,142 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2018-10-04 12:48:28,162 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:28,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-04 12:48:28,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 12:48:28,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 12:48:28,163 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:28,164 INFO L87 Difference]: Start difference. First operand 255 states and 256 transitions. Second operand 65 states. [2018-10-04 12:48:28,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:28,657 INFO L93 Difference]: Finished difference Result 387 states and 390 transitions. [2018-10-04 12:48:28,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 12:48:28,657 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 254 [2018-10-04 12:48:28,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:28,659 INFO L225 Difference]: With dead ends: 387 [2018-10-04 12:48:28,659 INFO L226 Difference]: Without dead ends: 259 [2018-10-04 12:48:28,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.4s impTime 18 [2018-10-04 12:48:28,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-10-04 12:48:28,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2018-10-04 12:48:28,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-10-04 12:48:28,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 260 transitions. [2018-10-04 12:48:28,663 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 260 transitions. Word has length 254 [2018-10-04 12:48:28,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:28,663 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 260 transitions. [2018-10-04 12:48:28,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 12:48:28,663 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 260 transitions. [2018-10-04 12:48:28,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-10-04 12:48:28,664 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:28,664 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 63, 63, 1, 1, 1, 1] [2018-10-04 12:48:28,664 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:28,664 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:28,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1476829097, now seen corresponding path program 63 times [2018-10-04 12:48:28,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:28,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:28,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:28,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:28,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:28,834 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:29,060 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:29,200 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:29,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 4032 trivial. 0 not checked. [2018-10-04 12:48:29,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:29,376 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 [2018-10-04 12:48:29,386 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:48:31,812 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-04 12:48:31,812 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:31,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:32,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 4032 trivial. 0 not checked. [2018-10-04 12:48:32,066 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:32,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-04 12:48:32,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 12:48:32,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 12:48:32,068 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:32,068 INFO L87 Difference]: Start difference. First operand 259 states and 260 transitions. Second operand 66 states. [2018-10-04 12:48:32,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:32,518 INFO L93 Difference]: Finished difference Result 393 states and 396 transitions. [2018-10-04 12:48:32,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 12:48:32,518 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 258 [2018-10-04 12:48:32,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:32,519 INFO L225 Difference]: With dead ends: 393 [2018-10-04 12:48:32,519 INFO L226 Difference]: Without dead ends: 263 [2018-10-04 12:48:32,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 21 [2018-10-04 12:48:32,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-10-04 12:48:32,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2018-10-04 12:48:32,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-10-04 12:48:32,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 264 transitions. [2018-10-04 12:48:32,524 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 264 transitions. Word has length 258 [2018-10-04 12:48:32,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:32,525 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 264 transitions. [2018-10-04 12:48:32,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 12:48:32,525 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 264 transitions. [2018-10-04 12:48:32,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-10-04 12:48:32,526 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:32,527 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 64, 64, 1, 1, 1, 1] [2018-10-04 12:48:32,527 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:32,527 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:32,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1190144203, now seen corresponding path program 64 times [2018-10-04 12:48:32,527 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:32,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:32,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:32,528 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:32,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:32,723 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:32,933 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:33,234 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:33,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2018-10-04 12:48:33,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:33,897 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 [2018-10-04 12:48:33,905 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:48:34,006 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:48:34,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:34,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:34,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2018-10-04 12:48:34,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:34,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-04 12:48:34,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-04 12:48:34,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-04 12:48:34,323 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:34,323 INFO L87 Difference]: Start difference. First operand 263 states and 264 transitions. Second operand 67 states. [2018-10-04 12:48:34,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:34,863 INFO L93 Difference]: Finished difference Result 399 states and 402 transitions. [2018-10-04 12:48:34,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 12:48:34,864 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 262 [2018-10-04 12:48:34,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:34,865 INFO L225 Difference]: With dead ends: 399 [2018-10-04 12:48:34,865 INFO L226 Difference]: Without dead ends: 267 [2018-10-04 12:48:34,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.0s impTime 22 [2018-10-04 12:48:34,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-10-04 12:48:34,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2018-10-04 12:48:34,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-10-04 12:48:34,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 268 transitions. [2018-10-04 12:48:34,871 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 268 transitions. Word has length 262 [2018-10-04 12:48:34,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:34,871 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 268 transitions. [2018-10-04 12:48:34,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-04 12:48:34,871 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 268 transitions. [2018-10-04 12:48:34,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-10-04 12:48:34,873 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:34,873 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 65, 65, 1, 1, 1, 1] [2018-10-04 12:48:34,873 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:34,873 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:34,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1043412799, now seen corresponding path program 65 times [2018-10-04 12:48:34,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:34,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:34,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:34,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:34,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:34,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:35,104 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:35,368 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:35,700 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:36,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2018-10-04 12:48:36,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:36,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:48:36,064 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:48:39,379 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-04 12:48:39,379 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:39,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:39,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2018-10-04 12:48:39,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:39,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-04 12:48:39,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 12:48:39,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 12:48:39,769 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:39,769 INFO L87 Difference]: Start difference. First operand 267 states and 268 transitions. Second operand 68 states. [2018-10-04 12:48:40,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:40,460 INFO L93 Difference]: Finished difference Result 405 states and 408 transitions. [2018-10-04 12:48:40,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 12:48:40,460 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 266 [2018-10-04 12:48:40,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:40,461 INFO L225 Difference]: With dead ends: 405 [2018-10-04 12:48:40,461 INFO L226 Difference]: Without dead ends: 271 [2018-10-04 12:48:40,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.8s impTime 23 [2018-10-04 12:48:40,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-10-04 12:48:40,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2018-10-04 12:48:40,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-10-04 12:48:40,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2018-10-04 12:48:40,468 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 266 [2018-10-04 12:48:40,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:40,468 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2018-10-04 12:48:40,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 12:48:40,468 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2018-10-04 12:48:40,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-10-04 12:48:40,469 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:40,470 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 66, 66, 1, 1, 1, 1] [2018-10-04 12:48:40,470 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:40,470 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:40,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1094612045, now seen corresponding path program 66 times [2018-10-04 12:48:40,470 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:40,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:40,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:40,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:40,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:40,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:40,655 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:40,835 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:41,117 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2018-10-04 12:48:41,558 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:41,558 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 [2018-10-04 12:48:41,566 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:48:43,358 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-04 12:48:43,359 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:43,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:43,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2018-10-04 12:48:43,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:43,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-04 12:48:43,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-04 12:48:43,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-04 12:48:43,663 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:43,663 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand 69 states. [2018-10-04 12:48:44,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:44,259 INFO L93 Difference]: Finished difference Result 411 states and 414 transitions. [2018-10-04 12:48:44,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 12:48:44,260 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 270 [2018-10-04 12:48:44,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:44,261 INFO L225 Difference]: With dead ends: 411 [2018-10-04 12:48:44,261 INFO L226 Difference]: Without dead ends: 275 [2018-10-04 12:48:44,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.7s impTime 22 [2018-10-04 12:48:44,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-10-04 12:48:44,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2018-10-04 12:48:44,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-10-04 12:48:44,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 276 transitions. [2018-10-04 12:48:44,266 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 276 transitions. Word has length 270 [2018-10-04 12:48:44,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:44,267 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 276 transitions. [2018-10-04 12:48:44,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-04 12:48:44,267 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 276 transitions. [2018-10-04 12:48:44,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-10-04 12:48:44,268 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:44,268 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 67, 67, 1, 1, 1, 1] [2018-10-04 12:48:44,268 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:44,268 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:44,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1764107815, now seen corresponding path program 67 times [2018-10-04 12:48:44,269 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:44,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:44,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:44,270 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:44,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:44,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:44,481 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:44,712 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:45,032 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:45,401 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:48:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2018-10-04 12:48:45,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:45,441 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 [2018-10-04 12:48:45,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:48:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:45,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:45,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2018-10-04 12:48:45,915 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:45,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-04 12:48:45,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 12:48:45,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 12:48:45,916 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:45,916 INFO L87 Difference]: Start difference. First operand 275 states and 276 transitions. Second operand 70 states. [2018-10-04 12:48:46,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:46,568 INFO L93 Difference]: Finished difference Result 417 states and 420 transitions. [2018-10-04 12:48:46,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 12:48:46,568 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 274 [2018-10-04 12:48:46,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:46,569 INFO L225 Difference]: With dead ends: 417 [2018-10-04 12:48:46,569 INFO L226 Difference]: Without dead ends: 279 [2018-10-04 12:48:46,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.8s impTime 8 [2018-10-04 12:48:46,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-10-04 12:48:46,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2018-10-04 12:48:46,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-10-04 12:48:46,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 280 transitions. [2018-10-04 12:48:46,575 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 280 transitions. Word has length 274 [2018-10-04 12:48:46,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:46,576 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 280 transitions. [2018-10-04 12:48:46,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 12:48:46,576 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 280 transitions. [2018-10-04 12:48:46,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-10-04 12:48:46,577 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:46,577 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 68, 68, 1, 1, 1, 1] [2018-10-04 12:48:46,578 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:46,578 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:46,578 INFO L82 PathProgramCache]: Analyzing trace with hash 224659099, now seen corresponding path program 68 times [2018-10-04 12:48:46,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:46,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:46,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:46,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:48:46,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:46,883 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:47,172 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:47,467 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:47,951 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:48:48,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 4692 trivial. 0 not checked. [2018-10-04 12:48:48,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:48,017 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 [2018-10-04 12:48:48,024 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:48:48,136 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:48:48,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:48,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 4692 trivial. 0 not checked. [2018-10-04 12:48:48,404 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:48,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-04 12:48:48,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 12:48:48,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 12:48:48,406 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:48,406 INFO L87 Difference]: Start difference. First operand 279 states and 280 transitions. Second operand 71 states. [2018-10-04 12:48:49,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:49,041 INFO L93 Difference]: Finished difference Result 423 states and 426 transitions. [2018-10-04 12:48:49,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 12:48:49,041 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 278 [2018-10-04 12:48:49,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:49,042 INFO L225 Difference]: With dead ends: 423 [2018-10-04 12:48:49,042 INFO L226 Difference]: Without dead ends: 283 [2018-10-04 12:48:49,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.0s impTime 9 [2018-10-04 12:48:49,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-10-04 12:48:49,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2018-10-04 12:48:49,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-10-04 12:48:49,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 284 transitions. [2018-10-04 12:48:49,046 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 284 transitions. Word has length 278 [2018-10-04 12:48:49,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:49,047 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 284 transitions. [2018-10-04 12:48:49,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 12:48:49,047 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 284 transitions. [2018-10-04 12:48:49,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-10-04 12:48:49,048 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:49,048 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 69, 69, 1, 1, 1, 1] [2018-10-04 12:48:49,048 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:49,048 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:49,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1795173647, now seen corresponding path program 69 times [2018-10-04 12:48:49,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:49,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:49,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:49,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:49,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:49,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:49,227 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:49,452 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:49,592 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:49,851 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:48:49,923 INFO L134 CoverageAnalysis]: Checked inductivity of 9660 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 4830 trivial. 0 not checked. [2018-10-04 12:48:49,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:49,924 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 [2018-10-04 12:48:49,931 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:48:53,359 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-04 12:48:53,359 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:53,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9660 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 4830 trivial. 0 not checked. [2018-10-04 12:48:54,012 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:54,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-04 12:48:54,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 12:48:54,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 12:48:54,014 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:54,014 INFO L87 Difference]: Start difference. First operand 283 states and 284 transitions. Second operand 72 states. [2018-10-04 12:48:54,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:54,604 INFO L93 Difference]: Finished difference Result 429 states and 432 transitions. [2018-10-04 12:48:54,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 12:48:54,604 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 282 [2018-10-04 12:48:54,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:54,606 INFO L225 Difference]: With dead ends: 429 [2018-10-04 12:48:54,606 INFO L226 Difference]: Without dead ends: 287 [2018-10-04 12:48:54,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.5s impTime 10 [2018-10-04 12:48:54,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-10-04 12:48:54,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2018-10-04 12:48:54,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-10-04 12:48:54,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 288 transitions. [2018-10-04 12:48:54,611 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 288 transitions. Word has length 282 [2018-10-04 12:48:54,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:54,612 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 288 transitions. [2018-10-04 12:48:54,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 12:48:54,612 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 288 transitions. [2018-10-04 12:48:54,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-10-04 12:48:54,613 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:54,613 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 70, 70, 1, 1, 1, 1] [2018-10-04 12:48:54,613 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:54,613 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:54,613 INFO L82 PathProgramCache]: Analyzing trace with hash -251684477, now seen corresponding path program 70 times [2018-10-04 12:48:54,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:54,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:54,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:54,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:54,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:54,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:54,799 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:55,008 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:55,147 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:55,436 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:48:55,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2018-10-04 12:48:55,497 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:55,497 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 [2018-10-04 12:48:55,505 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:48:55,617 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:48:55,617 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:55,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:55,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2018-10-04 12:48:55,890 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:55,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-04 12:48:55,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-04 12:48:55,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-04 12:48:55,891 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:55,891 INFO L87 Difference]: Start difference. First operand 287 states and 288 transitions. Second operand 73 states. [2018-10-04 12:48:56,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:56,445 INFO L93 Difference]: Finished difference Result 435 states and 438 transitions. [2018-10-04 12:48:56,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 12:48:56,445 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 286 [2018-10-04 12:48:56,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:56,446 INFO L225 Difference]: With dead ends: 435 [2018-10-04 12:48:56,446 INFO L226 Difference]: Without dead ends: 291 [2018-10-04 12:48:56,447 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime 9 [2018-10-04 12:48:56,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-10-04 12:48:56,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2018-10-04 12:48:56,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-10-04 12:48:56,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 292 transitions. [2018-10-04 12:48:56,451 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 292 transitions. Word has length 286 [2018-10-04 12:48:56,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:56,451 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 292 transitions. [2018-10-04 12:48:56,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-04 12:48:56,451 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 292 transitions. [2018-10-04 12:48:56,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-10-04 12:48:56,453 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:56,453 INFO L375 BasicCegarLoop]: trace histogram [72, 72, 71, 71, 1, 1, 1, 1] [2018-10-04 12:48:56,453 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:56,453 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:56,453 INFO L82 PathProgramCache]: Analyzing trace with hash 2112310263, now seen corresponding path program 71 times [2018-10-04 12:48:56,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:56,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:56,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:56,454 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:56,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:56,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:56,646 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:56,870 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:57,202 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:57,724 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:48:57,891 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 5112 trivial. 0 not checked. [2018-10-04 12:48:57,892 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:57,892 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 [2018-10-04 12:48:57,899 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:49:03,000 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-04 12:49:03,000 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:49:03,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:03,296 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 5112 trivial. 0 not checked. [2018-10-04 12:49:03,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:03,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-04 12:49:03,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 12:49:03,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 12:49:03,325 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:03,325 INFO L87 Difference]: Start difference. First operand 291 states and 292 transitions. Second operand 74 states. [2018-10-04 12:49:04,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:04,165 INFO L93 Difference]: Finished difference Result 441 states and 444 transitions. [2018-10-04 12:49:04,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 12:49:04,165 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 290 [2018-10-04 12:49:04,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:04,167 INFO L225 Difference]: With dead ends: 441 [2018-10-04 12:49:04,167 INFO L226 Difference]: Without dead ends: 295 [2018-10-04 12:49:04,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.1s impTime 12 [2018-10-04 12:49:04,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2018-10-04 12:49:04,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2018-10-04 12:49:04,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-10-04 12:49:04,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 296 transitions. [2018-10-04 12:49:04,172 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 296 transitions. Word has length 290 [2018-10-04 12:49:04,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:04,173 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 296 transitions. [2018-10-04 12:49:04,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 12:49:04,173 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 296 transitions. [2018-10-04 12:49:04,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-10-04 12:49:04,174 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:04,175 INFO L375 BasicCegarLoop]: trace histogram [73, 73, 72, 72, 1, 1, 1, 1] [2018-10-04 12:49:04,175 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:04,175 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:04,175 INFO L82 PathProgramCache]: Analyzing trace with hash 532431979, now seen corresponding path program 72 times [2018-10-04 12:49:04,175 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:04,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:04,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:04,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:49:04,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:04,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:04,447 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:04,692 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:04,822 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:05,068 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 5256 trivial. 0 not checked. [2018-10-04 12:49:05,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:05,191 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 [2018-10-04 12:49:05,198 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:49:08,060 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-04 12:49:08,060 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:49:08,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:08,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 5256 trivial. 0 not checked. [2018-10-04 12:49:08,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:08,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-04 12:49:08,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-04 12:49:08,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-04 12:49:08,420 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:08,420 INFO L87 Difference]: Start difference. First operand 295 states and 296 transitions. Second operand 75 states. [2018-10-04 12:49:09,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:09,023 INFO L93 Difference]: Finished difference Result 447 states and 450 transitions. [2018-10-04 12:49:09,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 12:49:09,023 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 294 [2018-10-04 12:49:09,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:09,025 INFO L225 Difference]: With dead ends: 447 [2018-10-04 12:49:09,025 INFO L226 Difference]: Without dead ends: 299 [2018-10-04 12:49:09,025 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.6s impTime 13 [2018-10-04 12:49:09,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-10-04 12:49:09,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2018-10-04 12:49:09,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-10-04 12:49:09,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 300 transitions. [2018-10-04 12:49:09,031 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 300 transitions. Word has length 294 [2018-10-04 12:49:09,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:09,031 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 300 transitions. [2018-10-04 12:49:09,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-04 12:49:09,031 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 300 transitions. [2018-10-04 12:49:09,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-10-04 12:49:09,033 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:09,033 INFO L375 BasicCegarLoop]: trace histogram [74, 74, 73, 73, 1, 1, 1, 1] [2018-10-04 12:49:09,033 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:09,033 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:09,033 INFO L82 PathProgramCache]: Analyzing trace with hash -737967393, now seen corresponding path program 73 times [2018-10-04 12:49:09,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:09,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:09,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:09,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:49:09,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:09,372 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:09,644 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:09,906 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:10,094 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:10,221 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked. [2018-10-04 12:49:10,221 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:10,221 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 [2018-10-04 12:49:10,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:49:10,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:10,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:10,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked. [2018-10-04 12:49:10,652 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:10,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-04 12:49:10,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 12:49:10,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 12:49:10,653 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:10,653 INFO L87 Difference]: Start difference. First operand 299 states and 300 transitions. Second operand 76 states. [2018-10-04 12:49:11,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:11,291 INFO L93 Difference]: Finished difference Result 453 states and 456 transitions. [2018-10-04 12:49:11,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-04 12:49:11,291 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 298 [2018-10-04 12:49:11,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:11,293 INFO L225 Difference]: With dead ends: 453 [2018-10-04 12:49:11,293 INFO L226 Difference]: Without dead ends: 303 [2018-10-04 12:49:11,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.7s impTime 14 [2018-10-04 12:49:11,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-10-04 12:49:11,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2018-10-04 12:49:11,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2018-10-04 12:49:11,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 304 transitions. [2018-10-04 12:49:11,300 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 304 transitions. Word has length 298 [2018-10-04 12:49:11,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:11,300 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 304 transitions. [2018-10-04 12:49:11,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-04 12:49:11,301 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 304 transitions. [2018-10-04 12:49:11,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-10-04 12:49:11,302 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:11,302 INFO L375 BasicCegarLoop]: trace histogram [75, 75, 74, 74, 1, 1, 1, 1] [2018-10-04 12:49:11,303 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:11,303 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:11,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1203898195, now seen corresponding path program 74 times [2018-10-04 12:49:11,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:11,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:11,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:11,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:49:11,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:11,500 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:11,634 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:11,883 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:12,297 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:12,472 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 5550 trivial. 0 not checked. [2018-10-04 12:49:12,472 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:12,473 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 [2018-10-04 12:49:12,480 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:49:12,602 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:49:12,602 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:49:12,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:12,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 5550 trivial. 0 not checked. [2018-10-04 12:49:12,939 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:12,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-04 12:49:12,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 12:49:12,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 12:49:12,940 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:12,940 INFO L87 Difference]: Start difference. First operand 303 states and 304 transitions. Second operand 77 states. [2018-10-04 12:49:13,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:13,650 INFO L93 Difference]: Finished difference Result 459 states and 462 transitions. [2018-10-04 12:49:13,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 12:49:13,651 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 302 [2018-10-04 12:49:13,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:13,652 INFO L225 Difference]: With dead ends: 459 [2018-10-04 12:49:13,652 INFO L226 Difference]: Without dead ends: 307 [2018-10-04 12:49:13,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime 13 [2018-10-04 12:49:13,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2018-10-04 12:49:13,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2018-10-04 12:49:13,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2018-10-04 12:49:13,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 308 transitions. [2018-10-04 12:49:13,657 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 308 transitions. Word has length 302 [2018-10-04 12:49:13,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:13,657 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 308 transitions. [2018-10-04 12:49:13,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 12:49:13,658 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 308 transitions. [2018-10-04 12:49:13,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2018-10-04 12:49:13,659 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:13,659 INFO L375 BasicCegarLoop]: trace histogram [76, 76, 75, 75, 1, 1, 1, 1] [2018-10-04 12:49:13,660 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:13,660 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:13,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1753427513, now seen corresponding path program 75 times [2018-10-04 12:49:13,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:13,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:13,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:13,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:49:13,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:13,851 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:13,993 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:14,256 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:15,051 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 5700 trivial. 0 not checked. [2018-10-04 12:49:15,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:15,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:49:15,366 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:49:20,122 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-04 12:49:20,122 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:49:20,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:20,404 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 5700 trivial. 0 not checked. [2018-10-04 12:49:20,429 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:20,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-04 12:49:20,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 12:49:20,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 12:49:20,430 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:20,430 INFO L87 Difference]: Start difference. First operand 307 states and 308 transitions. Second operand 78 states. [2018-10-04 12:49:21,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:21,281 INFO L93 Difference]: Finished difference Result 465 states and 468 transitions. [2018-10-04 12:49:21,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-04 12:49:21,282 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 306 [2018-10-04 12:49:21,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:21,283 INFO L225 Difference]: With dead ends: 465 [2018-10-04 12:49:21,283 INFO L226 Difference]: Without dead ends: 311 [2018-10-04 12:49:21,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.3s impTime 16 [2018-10-04 12:49:21,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2018-10-04 12:49:21,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2018-10-04 12:49:21,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2018-10-04 12:49:21,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 312 transitions. [2018-10-04 12:49:21,289 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 312 transitions. Word has length 306 [2018-10-04 12:49:21,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:21,289 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 312 transitions. [2018-10-04 12:49:21,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 12:49:21,289 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 312 transitions. [2018-10-04 12:49:21,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-10-04 12:49:21,290 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:21,290 INFO L375 BasicCegarLoop]: trace histogram [77, 77, 76, 76, 1, 1, 1, 1] [2018-10-04 12:49:21,291 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:21,291 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:21,291 INFO L82 PathProgramCache]: Analyzing trace with hash 255386171, now seen corresponding path program 76 times [2018-10-04 12:49:21,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:21,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:21,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:21,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:49:21,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:21,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:21,468 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:21,728 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:21,913 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:22,462 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:22,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 5852 trivial. 0 not checked. [2018-10-04 12:49:22,821 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:22,821 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 [2018-10-04 12:49:22,829 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:49:22,951 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:49:22,951 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:49:22,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:23,236 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 5852 trivial. 0 not checked. [2018-10-04 12:49:23,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:23,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-04 12:49:23,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-04 12:49:23,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-04 12:49:23,257 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:23,258 INFO L87 Difference]: Start difference. First operand 311 states and 312 transitions. Second operand 79 states. [2018-10-04 12:49:24,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:24,183 INFO L93 Difference]: Finished difference Result 471 states and 474 transitions. [2018-10-04 12:49:24,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-04 12:49:24,183 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 310 [2018-10-04 12:49:24,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:24,184 INFO L225 Difference]: With dead ends: 471 [2018-10-04 12:49:24,184 INFO L226 Difference]: Without dead ends: 315 [2018-10-04 12:49:24,185 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.1s impTime 17 [2018-10-04 12:49:24,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-10-04 12:49:24,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2018-10-04 12:49:24,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-10-04 12:49:24,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 316 transitions. [2018-10-04 12:49:24,189 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 316 transitions. Word has length 310 [2018-10-04 12:49:24,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:24,190 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 316 transitions. [2018-10-04 12:49:24,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-04 12:49:24,190 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 316 transitions. [2018-10-04 12:49:24,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-10-04 12:49:24,191 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:24,191 INFO L375 BasicCegarLoop]: trace histogram [78, 78, 77, 77, 1, 1, 1, 1] [2018-10-04 12:49:24,191 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:24,191 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:24,191 INFO L82 PathProgramCache]: Analyzing trace with hash -361023313, now seen corresponding path program 77 times [2018-10-04 12:49:24,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:24,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:24,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:24,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:49:24,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:24,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:24,374 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:24,492 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:24,975 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:25,498 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 6006 trivial. 0 not checked. [2018-10-04 12:49:25,881 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:25,881 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 [2018-10-04 12:49:25,889 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:49:35,269 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-04 12:49:35,270 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:49:35,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:35,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 6006 trivial. 0 not checked. [2018-10-04 12:49:35,593 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:35,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-04 12:49:35,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 12:49:35,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 12:49:35,595 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:35,595 INFO L87 Difference]: Start difference. First operand 315 states and 316 transitions. Second operand 80 states. [2018-10-04 12:49:36,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:36,565 INFO L93 Difference]: Finished difference Result 477 states and 480 transitions. [2018-10-04 12:49:36,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-04 12:49:36,565 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 314 [2018-10-04 12:49:36,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:36,566 INFO L225 Difference]: With dead ends: 477 [2018-10-04 12:49:36,566 INFO L226 Difference]: Without dead ends: 319 [2018-10-04 12:49:36,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.3s impTime 18 [2018-10-04 12:49:36,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-10-04 12:49:36,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-10-04 12:49:36,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-10-04 12:49:36,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 320 transitions. [2018-10-04 12:49:36,571 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 320 transitions. Word has length 314 [2018-10-04 12:49:36,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:36,571 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 320 transitions. [2018-10-04 12:49:36,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 12:49:36,572 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 320 transitions. [2018-10-04 12:49:36,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-10-04 12:49:36,573 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:36,573 INFO L375 BasicCegarLoop]: trace histogram [79, 79, 78, 78, 1, 1, 1, 1] [2018-10-04 12:49:36,573 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:36,574 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:36,574 INFO L82 PathProgramCache]: Analyzing trace with hash 340317475, now seen corresponding path program 78 times [2018-10-04 12:49:36,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:36,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:36,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:36,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:49:36,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:36,817 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:37,031 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:37,172 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:37,470 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 6162 trivial. 0 not checked. [2018-10-04 12:49:37,700 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:37,700 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 [2018-10-04 12:49:37,708 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:49:41,157 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-04 12:49:41,157 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:49:41,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:41,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 6162 trivial. 0 not checked. [2018-10-04 12:49:41,483 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:41,483 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-04 12:49:41,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-04 12:49:41,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-04 12:49:41,485 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:41,485 INFO L87 Difference]: Start difference. First operand 319 states and 320 transitions. Second operand 81 states. [2018-10-04 12:49:42,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:42,275 INFO L93 Difference]: Finished difference Result 483 states and 486 transitions. [2018-10-04 12:49:42,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-04 12:49:42,276 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 318 [2018-10-04 12:49:42,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:42,278 INFO L225 Difference]: With dead ends: 483 [2018-10-04 12:49:42,278 INFO L226 Difference]: Without dead ends: 323 [2018-10-04 12:49:42,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.7s impTime 17 [2018-10-04 12:49:42,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-10-04 12:49:42,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2018-10-04 12:49:42,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-10-04 12:49:42,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 324 transitions. [2018-10-04 12:49:42,283 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 324 transitions. Word has length 318 [2018-10-04 12:49:42,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:42,283 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 324 transitions. [2018-10-04 12:49:42,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-04 12:49:42,283 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 324 transitions. [2018-10-04 12:49:42,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2018-10-04 12:49:42,285 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:42,286 INFO L375 BasicCegarLoop]: trace histogram [80, 80, 79, 79, 1, 1, 1, 1] [2018-10-04 12:49:42,286 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:42,286 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:42,286 INFO L82 PathProgramCache]: Analyzing trace with hash -416893033, now seen corresponding path program 79 times [2018-10-04 12:49:42,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:42,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:42,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:42,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:49:42,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:42,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:42,595 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:42,855 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:43,159 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:43,683 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:43,844 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 6320 trivial. 0 not checked. [2018-10-04 12:49:43,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:43,844 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 [2018-10-04 12:49:43,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:49:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:43,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:44,278 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 6320 trivial. 0 not checked. [2018-10-04 12:49:44,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:44,299 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-04 12:49:44,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-04 12:49:44,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-04 12:49:44,300 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:44,300 INFO L87 Difference]: Start difference. First operand 323 states and 324 transitions. Second operand 82 states. [2018-10-04 12:49:45,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:45,323 INFO L93 Difference]: Finished difference Result 489 states and 492 transitions. [2018-10-04 12:49:45,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-04 12:49:45,323 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 322 [2018-10-04 12:49:45,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:45,325 INFO L225 Difference]: With dead ends: 489 [2018-10-04 12:49:45,325 INFO L226 Difference]: Without dead ends: 327 [2018-10-04 12:49:45,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.0s impTime 20 [2018-10-04 12:49:45,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-10-04 12:49:45,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2018-10-04 12:49:45,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2018-10-04 12:49:45,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 328 transitions. [2018-10-04 12:49:45,331 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 328 transitions. Word has length 322 [2018-10-04 12:49:45,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:45,331 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 328 transitions. [2018-10-04 12:49:45,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-04 12:49:45,331 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 328 transitions. [2018-10-04 12:49:45,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2018-10-04 12:49:45,333 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:45,333 INFO L375 BasicCegarLoop]: trace histogram [81, 81, 80, 80, 1, 1, 1, 1] [2018-10-04 12:49:45,333 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:45,333 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:45,333 INFO L82 PathProgramCache]: Analyzing trace with hash -317071349, now seen corresponding path program 80 times [2018-10-04 12:49:45,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:45,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:45,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:45,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:49:45,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:45,548 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:45,763 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:46,065 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:46,613 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2018-10-04 12:49:46,752 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:46,752 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 [2018-10-04 12:49:46,760 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:49:46,889 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:49:46,890 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:49:46,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2018-10-04 12:49:47,211 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:47,211 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-04 12:49:47,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-04 12:49:47,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-04 12:49:47,212 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:47,213 INFO L87 Difference]: Start difference. First operand 327 states and 328 transitions. Second operand 83 states. [2018-10-04 12:49:48,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:48,236 INFO L93 Difference]: Finished difference Result 495 states and 498 transitions. [2018-10-04 12:49:48,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-04 12:49:48,236 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 326 [2018-10-04 12:49:48,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:48,237 INFO L225 Difference]: With dead ends: 495 [2018-10-04 12:49:48,237 INFO L226 Difference]: Without dead ends: 331 [2018-10-04 12:49:48,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.9s impTime 21 [2018-10-04 12:49:48,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2018-10-04 12:49:48,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2018-10-04 12:49:48,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2018-10-04 12:49:48,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 332 transitions. [2018-10-04 12:49:48,242 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 332 transitions. Word has length 326 [2018-10-04 12:49:48,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:48,243 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 332 transitions. [2018-10-04 12:49:48,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-04 12:49:48,243 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 332 transitions. [2018-10-04 12:49:48,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2018-10-04 12:49:48,244 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:48,244 INFO L375 BasicCegarLoop]: trace histogram [82, 82, 81, 81, 1, 1, 1, 1] [2018-10-04 12:49:48,244 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:48,244 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:48,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1616425345, now seen corresponding path program 81 times [2018-10-04 12:49:48,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:48,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:48,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:48,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:49:48,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:48,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:48,520 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:48,690 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:48,830 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:49,547 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13284 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 6642 trivial. 0 not checked. [2018-10-04 12:49:49,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:49,911 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 [2018-10-04 12:49:49,917 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:49:56,115 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-10-04 12:49:56,115 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:49:56,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 13284 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 6642 trivial. 0 not checked. [2018-10-04 12:49:56,449 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:56,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-04 12:49:56,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-04 12:49:56,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-04 12:49:56,450 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:56,450 INFO L87 Difference]: Start difference. First operand 331 states and 332 transitions. Second operand 84 states. [2018-10-04 12:49:57,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:57,296 INFO L93 Difference]: Finished difference Result 501 states and 504 transitions. [2018-10-04 12:49:57,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-04 12:49:57,296 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 330 [2018-10-04 12:49:57,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:57,298 INFO L225 Difference]: With dead ends: 501 [2018-10-04 12:49:57,298 INFO L226 Difference]: Without dead ends: 335 [2018-10-04 12:49:57,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 0.8s impTime 22 [2018-10-04 12:49:57,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-10-04 12:49:57,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2018-10-04 12:49:57,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-10-04 12:49:57,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 336 transitions. [2018-10-04 12:49:57,302 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 336 transitions. Word has length 330 [2018-10-04 12:49:57,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:57,302 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 336 transitions. [2018-10-04 12:49:57,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-04 12:49:57,303 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 336 transitions. [2018-10-04 12:49:57,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2018-10-04 12:49:57,304 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:57,304 INFO L375 BasicCegarLoop]: trace histogram [83, 83, 82, 82, 1, 1, 1, 1] [2018-10-04 12:49:57,304 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:57,304 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:57,304 INFO L82 PathProgramCache]: Analyzing trace with hash 668205811, now seen corresponding path program 82 times [2018-10-04 12:49:57,304 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:57,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:57,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:57,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:49:57,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:57,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:57,496 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:57,686 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:57,931 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:58,459 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked. [2018-10-04 12:49:58,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:58,963 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 [2018-10-04 12:49:58,971 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:49:59,107 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:49:59,107 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:49:59,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:59,528 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked. [2018-10-04 12:49:59,549 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:59,549 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-04 12:49:59,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-04 12:49:59,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-04 12:49:59,550 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:59,550 INFO L87 Difference]: Start difference. First operand 335 states and 336 transitions. Second operand 85 states. [2018-10-04 12:50:00,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:50:00,710 INFO L93 Difference]: Finished difference Result 507 states and 510 transitions. [2018-10-04 12:50:00,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-04 12:50:00,710 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 334 [2018-10-04 12:50:00,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:50:00,711 INFO L225 Difference]: With dead ends: 507 [2018-10-04 12:50:00,712 INFO L226 Difference]: Without dead ends: 339 [2018-10-04 12:50:00,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.2s impTime 23 [2018-10-04 12:50:00,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-10-04 12:50:00,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2018-10-04 12:50:00,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-10-04 12:50:00,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 340 transitions. [2018-10-04 12:50:00,717 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 340 transitions. Word has length 334 [2018-10-04 12:50:00,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:50:00,717 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 340 transitions. [2018-10-04 12:50:00,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-04 12:50:00,718 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 340 transitions. [2018-10-04 12:50:00,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-10-04 12:50:00,719 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:50:00,719 INFO L375 BasicCegarLoop]: trace histogram [84, 84, 83, 83, 1, 1, 1, 1] [2018-10-04 12:50:00,719 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:50:00,719 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:50:00,719 INFO L82 PathProgramCache]: Analyzing trace with hash 505740647, now seen corresponding path program 83 times [2018-10-04 12:50:00,720 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:50:00,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:50:00,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:00,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:50:00,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:00,944 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:50:01,125 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:01,306 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:01,835 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:02,463 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 6972 trivial. 0 not checked. [2018-10-04 12:50:02,463 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:50:02,464 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 [2018-10-04 12:50:02,471 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:50:11,644 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-10-04 12:50:11,644 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:50:11,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:50:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 6972 trivial. 0 not checked. [2018-10-04 12:50:11,983 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:50:11,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-04 12:50:11,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-04 12:50:11,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-04 12:50:11,984 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:50:11,984 INFO L87 Difference]: Start difference. First operand 339 states and 340 transitions. Second operand 86 states. [2018-10-04 12:50:13,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:50:13,105 INFO L93 Difference]: Finished difference Result 513 states and 516 transitions. [2018-10-04 12:50:13,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-04 12:50:13,105 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 338 [2018-10-04 12:50:13,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:50:13,107 INFO L225 Difference]: With dead ends: 513 [2018-10-04 12:50:13,107 INFO L226 Difference]: Without dead ends: 343 [2018-10-04 12:50:13,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.3s impTime 24 [2018-10-04 12:50:13,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-10-04 12:50:13,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2018-10-04 12:50:13,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2018-10-04 12:50:13,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 344 transitions. [2018-10-04 12:50:13,112 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 344 transitions. Word has length 338 [2018-10-04 12:50:13,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:50:13,113 INFO L480 AbstractCegarLoop]: Abstraction has 343 states and 344 transitions. [2018-10-04 12:50:13,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-04 12:50:13,113 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 344 transitions. [2018-10-04 12:50:13,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-10-04 12:50:13,114 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:50:13,115 INFO L375 BasicCegarLoop]: trace histogram [85, 85, 84, 84, 1, 1, 1, 1] [2018-10-04 12:50:13,115 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:50:13,115 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:50:13,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1251950043, now seen corresponding path program 84 times [2018-10-04 12:50:13,115 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:50:13,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:50:13,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:13,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:50:13,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:13,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:13,342 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:50:13,548 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:13,883 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:14,413 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:14,587 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:14,646 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2018-10-04 12:50:14,646 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:50:14,646 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 [2018-10-04 12:50:14,658 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:50:19,364 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-10-04 12:50:19,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:50:19,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:50:19,691 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2018-10-04 12:50:19,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:50:19,719 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-04 12:50:19,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-04 12:50:19,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-04 12:50:19,721 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:50:19,721 INFO L87 Difference]: Start difference. First operand 343 states and 344 transitions. Second operand 87 states. [2018-10-04 12:50:20,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:50:20,788 INFO L93 Difference]: Finished difference Result 519 states and 522 transitions. [2018-10-04 12:50:20,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-04 12:50:20,788 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 342 [2018-10-04 12:50:20,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:50:20,790 INFO L225 Difference]: With dead ends: 519 [2018-10-04 12:50:20,790 INFO L226 Difference]: Without dead ends: 347 [2018-10-04 12:50:20,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.0s impTime 8 [2018-10-04 12:50:20,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2018-10-04 12:50:20,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2018-10-04 12:50:20,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2018-10-04 12:50:20,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 348 transitions. [2018-10-04 12:50:20,796 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 348 transitions. Word has length 342 [2018-10-04 12:50:20,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:50:20,797 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 348 transitions. [2018-10-04 12:50:20,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-04 12:50:20,797 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 348 transitions. [2018-10-04 12:50:20,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2018-10-04 12:50:20,798 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:50:20,798 INFO L375 BasicCegarLoop]: trace histogram [86, 86, 85, 85, 1, 1, 1, 1] [2018-10-04 12:50:20,798 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:50:20,799 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:50:20,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1690813519, now seen corresponding path program 85 times [2018-10-04 12:50:20,799 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:50:20,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:50:20,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:20,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:50:20,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:21,114 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:50:21,309 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:21,597 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:22,067 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:22,684 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:22,786 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 7310 trivial. 0 not checked. [2018-10-04 12:50:22,786 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:50:22,786 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:50:22,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:50:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:22,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:50:23,310 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 7310 trivial. 0 not checked. [2018-10-04 12:50:23,330 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:50:23,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-04 12:50:23,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-04 12:50:23,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-04 12:50:23,332 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:50:23,332 INFO L87 Difference]: Start difference. First operand 347 states and 348 transitions. Second operand 88 states. [2018-10-04 12:50:24,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:50:24,577 INFO L93 Difference]: Finished difference Result 525 states and 528 transitions. [2018-10-04 12:50:24,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-04 12:50:24,577 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 346 [2018-10-04 12:50:24,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:50:24,579 INFO L225 Difference]: With dead ends: 525 [2018-10-04 12:50:24,579 INFO L226 Difference]: Without dead ends: 351 [2018-10-04 12:50:24,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.5s impTime 9 [2018-10-04 12:50:24,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-10-04 12:50:24,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2018-10-04 12:50:24,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-10-04 12:50:24,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 352 transitions. [2018-10-04 12:50:24,584 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 352 transitions. Word has length 346 [2018-10-04 12:50:24,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:50:24,584 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 352 transitions. [2018-10-04 12:50:24,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-04 12:50:24,584 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 352 transitions. [2018-10-04 12:50:24,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2018-10-04 12:50:24,586 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:50:24,586 INFO L375 BasicCegarLoop]: trace histogram [87, 87, 86, 86, 1, 1, 1, 1] [2018-10-04 12:50:24,586 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:50:24,586 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:50:24,586 INFO L82 PathProgramCache]: Analyzing trace with hash -744255293, now seen corresponding path program 86 times [2018-10-04 12:50:24,586 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:50:24,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:50:24,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:24,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:50:24,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:24,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:24,800 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:50:25,018 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:25,138 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:25,410 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:25,820 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:25,933 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 7482 trivial. 0 not checked. [2018-10-04 12:50:25,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:50:25,933 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 [2018-10-04 12:50:25,941 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:50:26,089 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:50:26,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:50:26,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:50:26,550 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 7482 trivial. 0 not checked. [2018-10-04 12:50:26,570 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:50:26,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-04 12:50:26,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-04 12:50:26,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-04 12:50:26,572 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:50:26,572 INFO L87 Difference]: Start difference. First operand 351 states and 352 transitions. Second operand 89 states. [2018-10-04 12:50:27,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:50:27,523 INFO L93 Difference]: Finished difference Result 531 states and 534 transitions. [2018-10-04 12:50:27,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-04 12:50:27,524 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 350 [2018-10-04 12:50:27,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:50:27,525 INFO L225 Difference]: With dead ends: 531 [2018-10-04 12:50:27,525 INFO L226 Difference]: Without dead ends: 355 [2018-10-04 12:50:27,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 0.9s impTime 10 [2018-10-04 12:50:27,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2018-10-04 12:50:27,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 355. [2018-10-04 12:50:27,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2018-10-04 12:50:27,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 356 transitions. [2018-10-04 12:50:27,531 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 356 transitions. Word has length 350 [2018-10-04 12:50:27,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:50:27,531 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 356 transitions. [2018-10-04 12:50:27,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-04 12:50:27,531 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 356 transitions. [2018-10-04 12:50:27,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-10-04 12:50:27,532 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:50:27,532 INFO L375 BasicCegarLoop]: trace histogram [88, 88, 87, 87, 1, 1, 1, 1] [2018-10-04 12:50:27,532 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:50:27,533 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:50:27,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1840751415, now seen corresponding path program 87 times [2018-10-04 12:50:27,533 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:50:27,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:50:27,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:27,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:50:27,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:27,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:27,748 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:50:27,865 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:28,053 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:28,419 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:28,903 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:29,058 INFO L134 CoverageAnalysis]: Checked inductivity of 15312 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 7656 trivial. 0 not checked. [2018-10-04 12:50:29,058 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:50:29,058 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 [2018-10-04 12:50:29,067 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:50:37,167 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-10-04 12:50:37,167 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:50:37,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:50:37,519 INFO L134 CoverageAnalysis]: Checked inductivity of 15312 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 7656 trivial. 0 not checked. [2018-10-04 12:50:37,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:50:37,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-04 12:50:37,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-04 12:50:37,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-04 12:50:37,547 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:50:37,547 INFO L87 Difference]: Start difference. First operand 355 states and 356 transitions. Second operand 90 states. [2018-10-04 12:50:38,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:50:38,582 INFO L93 Difference]: Finished difference Result 537 states and 540 transitions. [2018-10-04 12:50:38,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-04 12:50:38,583 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 354 [2018-10-04 12:50:38,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:50:38,585 INFO L225 Difference]: With dead ends: 537 [2018-10-04 12:50:38,585 INFO L226 Difference]: Without dead ends: 359 [2018-10-04 12:50:38,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.0s impTime 11 [2018-10-04 12:50:38,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2018-10-04 12:50:38,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2018-10-04 12:50:38,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2018-10-04 12:50:38,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 360 transitions. [2018-10-04 12:50:38,590 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 360 transitions. Word has length 354 [2018-10-04 12:50:38,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:50:38,590 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 360 transitions. [2018-10-04 12:50:38,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-04 12:50:38,591 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 360 transitions. [2018-10-04 12:50:38,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2018-10-04 12:50:38,592 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:50:38,592 INFO L375 BasicCegarLoop]: trace histogram [89, 89, 88, 88, 1, 1, 1, 1] [2018-10-04 12:50:38,592 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:50:38,592 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:50:38,592 INFO L82 PathProgramCache]: Analyzing trace with hash 956890027, now seen corresponding path program 88 times [2018-10-04 12:50:38,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:50:38,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:50:38,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:38,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:50:38,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:38,785 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:50:39,014 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:39,189 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:39,710 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:40,337 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:40,594 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 7832 trivial. 0 not checked. [2018-10-04 12:50:40,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:50:40,594 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 [2018-10-04 12:50:40,601 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:50:40,741 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:50:40,741 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:50:40,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:50:41,074 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 7832 trivial. 0 not checked. [2018-10-04 12:50:41,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:50:41,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-04 12:50:41,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-04 12:50:41,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-04 12:50:41,096 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:50:41,096 INFO L87 Difference]: Start difference. First operand 359 states and 360 transitions. Second operand 91 states. [2018-10-04 12:50:42,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:50:42,437 INFO L93 Difference]: Finished difference Result 543 states and 546 transitions. [2018-10-04 12:50:42,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-04 12:50:42,437 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 358 [2018-10-04 12:50:42,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:50:42,439 INFO L225 Difference]: With dead ends: 543 [2018-10-04 12:50:42,439 INFO L226 Difference]: Without dead ends: 363 [2018-10-04 12:50:42,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.5s impTime 12 [2018-10-04 12:50:42,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-10-04 12:50:42,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2018-10-04 12:50:42,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2018-10-04 12:50:42,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 364 transitions. [2018-10-04 12:50:42,444 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 364 transitions. Word has length 358 [2018-10-04 12:50:42,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:50:42,444 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 364 transitions. [2018-10-04 12:50:42,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-04 12:50:42,444 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 364 transitions. [2018-10-04 12:50:42,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2018-10-04 12:50:42,445 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:50:42,445 INFO L375 BasicCegarLoop]: trace histogram [90, 90, 89, 89, 1, 1, 1, 1] [2018-10-04 12:50:42,445 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:50:42,446 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:50:42,446 INFO L82 PathProgramCache]: Analyzing trace with hash 723294751, now seen corresponding path program 89 times [2018-10-04 12:50:42,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:50:42,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:50:42,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:42,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:50:42,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:42,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:42,641 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:50:42,793 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:43,034 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:43,446 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:43,967 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:44,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16020 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 8010 trivial. 0 not checked. [2018-10-04 12:50:44,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:50:44,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:50:44,209 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown