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/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 20:49:02,539 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:49:02,541 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:49:02,553 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 20:49:02,553 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 20:49:02,554 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 20:49:02,555 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 20:49:02,557 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 20:49:02,559 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 20:49:02,560 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 20:49:02,561 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 20:49:02,589 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 [2018-09-30 20:49:02,604 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:49:02,604 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:49:02,605 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:49:02,605 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:49:02,606 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:49:02,606 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:49:02,606 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:49:02,607 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:49:02,607 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:49:02,607 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:49:02,607 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:49:02,607 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:49:02,608 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:49:02,608 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:49:02,608 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:49:02,608 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:49:02,608 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:49:02,609 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:49:02,609 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:49:02,609 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:49:02,609 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:49:02,609 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:49:02,609 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:49:02,610 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:49:02,610 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:49:02,610 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:49:02,610 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:49:02,610 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:49:02,611 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:49:02,611 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:49:02,611 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-30 20:49:02,653 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:49:02,665 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:49:02,668 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:49:02,670 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:49:02,670 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:49:02,671 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl [2018-09-30 20:49:02,672 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl' [2018-09-30 20:49:02,715 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:49:02,718 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:49:02,718 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:49:02,719 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:49:02,719 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:49:02,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:49:02" (1/1) ... [2018-09-30 20:49:02,752 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:49:02" (1/1) ... [2018-09-30 20:49:02,757 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 20:49:02,757 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 20:49:02,757 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 20:49:02,759 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:49:02,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:49:02,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:49:02,760 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:49:02,771 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:49:02" (1/1) ... [2018-09-30 20:49:02,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:49:02" (1/1) ... [2018-09-30 20:49:02,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:49:02" (1/1) ... [2018-09-30 20:49:02,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:49:02" (1/1) ... [2018-09-30 20:49:02,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:49:02" (1/1) ... [2018-09-30 20:49:02,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:49:02" (1/1) ... [2018-09-30 20:49:02,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:49:02" (1/1) ... [2018-09-30 20:49:02,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:49:02,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:49:02,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:49:02,782 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:49:02,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:49:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:49:02,852 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-30 20:49:02,852 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-30 20:49:02,852 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-30 20:49:03,052 INFO L345 CfgBuilder]: Using library mode [2018-09-30 20:49:03,053 INFO L202 PluginConnector]: Adding new model HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:49:03 BoogieIcfgContainer [2018-09-30 20:49:03,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:49:03,054 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:49:03,054 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:49:03,057 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:49:03,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:49:02" (1/2) ... [2018-09-30 20:49:03,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d0565ef and model type HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:49:03, skipping insertion in model container [2018-09-30 20:49:03,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:49:03" (2/2) ... [2018-09-30 20:49:03,061 INFO L112 eAbstractionObserver]: Analyzing ICFG HiddenEqualityWithBranches.bpl [2018-09-30 20:49:03,070 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:49:03,078 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:49:03,130 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:49:03,131 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:49:03,131 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:49:03,131 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:49:03,131 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:49:03,131 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:49:03,132 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:49:03,132 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:49:03,132 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:49:03,148 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-30 20:49:03,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-09-30 20:49:03,158 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:03,159 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-09-30 20:49:03,160 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:03,169 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:03,169 INFO L82 PathProgramCache]: Analyzing trace with hash 979, now seen corresponding path program 1 times [2018-09-30 20:49:03,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:03,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:03,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:03,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:03,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:03,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:03,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:03,316 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:49:03,316 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-30 20:49:03,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:49:03,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:49:03,334 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:03,336 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-30 20:49:03,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:03,576 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-09-30 20:49:03,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:49:03,578 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-09-30 20:49:03,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:03,590 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:49:03,590 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 20:49:03,593 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 20:49:03,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 20:49:03,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 20:49:03,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 20:49:03,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 9 transitions. [2018-09-30 20:49:03,628 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 9 transitions. Word has length 2 [2018-09-30 20:49:03,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:03,628 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 9 transitions. [2018-09-30 20:49:03,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:49:03,628 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 9 transitions. [2018-09-30 20:49:03,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 20:49:03,629 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:03,629 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-30 20:49:03,629 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:03,630 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:03,630 INFO L82 PathProgramCache]: Analyzing trace with hash 28757385, now seen corresponding path program 1 times [2018-09-30 20:49:03,630 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:03,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:03,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:03,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:03,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:03,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:03,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:03,684 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:49:03,684 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 20:49:03,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:49:03,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:49:03,687 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:03,687 INFO L87 Difference]: Start difference. First operand 7 states and 9 transitions. Second operand 3 states. [2018-09-30 20:49:03,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:03,738 INFO L93 Difference]: Finished difference Result 12 states and 17 transitions. [2018-09-30 20:49:03,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:49:03,738 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-09-30 20:49:03,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:03,739 INFO L225 Difference]: With dead ends: 12 [2018-09-30 20:49:03,740 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 20:49:03,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 20:49:03,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 20:49:03,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 20:49:03,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 20:49:03,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-30 20:49:03,744 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-09-30 20:49:03,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:03,745 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-30 20:49:03,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:49:03,745 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-30 20:49:03,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 20:49:03,748 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:03,748 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-30 20:49:03,748 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:03,748 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:03,748 INFO L82 PathProgramCache]: Analyzing trace with hash 28757447, now seen corresponding path program 1 times [2018-09-30 20:49:03,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:03,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:03,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:03,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:03,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:03,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:03,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:03,816 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:03,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:03,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:03,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:03,978 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:03,978 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-09-30 20:49:03,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 20:49:03,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 20:49:03,979 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:03,979 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 4 states. [2018-09-30 20:49:04,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:04,478 INFO L93 Difference]: Finished difference Result 14 states and 20 transitions. [2018-09-30 20:49:04,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 20:49:04,479 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-09-30 20:49:04,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:04,480 INFO L225 Difference]: With dead ends: 14 [2018-09-30 20:49:04,480 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 20:49:04,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:49:04,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 20:49:04,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 20:49:04,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 20:49:04,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-09-30 20:49:04,485 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 5 [2018-09-30 20:49:04,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:04,486 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-09-30 20:49:04,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 20:49:04,486 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-09-30 20:49:04,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 20:49:04,487 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:04,487 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2018-09-30 20:49:04,487 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:04,488 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:04,488 INFO L82 PathProgramCache]: Analyzing trace with hash 2014203669, now seen corresponding path program 1 times [2018-09-30 20:49:04,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:04,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:04,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:04,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:04,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:04,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:04,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:04,563 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) [2018-09-30 20:49:04,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:04,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:04,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:04,673 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:04,674 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 20:49:04,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 20:49:04,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 20:49:04,675 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:04,675 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 4 states. [2018-09-30 20:49:04,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:04,815 INFO L93 Difference]: Finished difference Result 15 states and 20 transitions. [2018-09-30 20:49:04,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 20:49:04,815 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-09-30 20:49:04,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:04,816 INFO L225 Difference]: With dead ends: 15 [2018-09-30 20:49:04,816 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 20:49:04,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 20:49:04,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 20:49:04,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 20:49:04,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 20:49:04,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2018-09-30 20:49:04,821 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2018-09-30 20:49:04,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:04,821 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2018-09-30 20:49:04,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 20:49:04,822 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2018-09-30 20:49:04,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 20:49:04,822 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:04,822 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1] [2018-09-30 20:49:04,823 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:04,823 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:04,823 INFO L82 PathProgramCache]: Analyzing trace with hash 2014203731, now seen corresponding path program 2 times [2018-09-30 20:49:04,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:04,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:04,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:04,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:04,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:04,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:04,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:04,999 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:04,999 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:05,016 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:49:05,058 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:49:05,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:05,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:05,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:05,192 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:05,192 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 20:49:05,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 20:49:05,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 20:49:05,193 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:05,193 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 5 states. [2018-09-30 20:49:05,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:05,386 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-09-30 20:49:05,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:49:05,386 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-30 20:49:05,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:05,387 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:49:05,387 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 20:49:05,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:49:05,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 20:49:05,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 20:49:05,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 20:49:05,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2018-09-30 20:49:05,391 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2018-09-30 20:49:05,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:05,392 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2018-09-30 20:49:05,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 20:49:05,392 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2018-09-30 20:49:05,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:49:05,393 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:05,393 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1] [2018-09-30 20:49:05,393 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:05,393 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:05,393 INFO L82 PathProgramCache]: Analyzing trace with hash 154849801, now seen corresponding path program 2 times [2018-09-30 20:49:05,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:05,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:05,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:05,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:05,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:05,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:05,448 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:05,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:05,457 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:49:05,465 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:49:05,465 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:05,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:05,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:05,528 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:05,529 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 20:49:05,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 20:49:05,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 20:49:05,530 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:05,530 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 5 states. [2018-09-30 20:49:05,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:05,589 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2018-09-30 20:49:05,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:49:05,590 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-09-30 20:49:05,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:05,591 INFO L225 Difference]: With dead ends: 18 [2018-09-30 20:49:05,591 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 20:49:05,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 20:49:05,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 20:49:05,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 20:49:05,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 20:49:05,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-09-30 20:49:05,595 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2018-09-30 20:49:05,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:05,596 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-09-30 20:49:05,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 20:49:05,596 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-09-30 20:49:05,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:49:05,597 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:05,597 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1] [2018-09-30 20:49:05,597 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:05,597 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:05,598 INFO L82 PathProgramCache]: Analyzing trace with hash 154849863, now seen corresponding path program 3 times [2018-09-30 20:49:05,598 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:05,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:05,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:05,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:05,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:05,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:05,661 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:05,661 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:05,671 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:49:05,711 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 20:49:05,711 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:05,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:05,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:06,030 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:06,031 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 20:49:06,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:49:06,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:49:06,034 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:06,034 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 6 states. [2018-09-30 20:49:06,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:06,237 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2018-09-30 20:49:06,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:49:06,238 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2018-09-30 20:49:06,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:06,239 INFO L225 Difference]: With dead ends: 20 [2018-09-30 20:49:06,239 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 20:49:06,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:49:06,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 20:49:06,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 20:49:06,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 20:49:06,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-09-30 20:49:06,244 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2018-09-30 20:49:06,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:06,245 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-09-30 20:49:06,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:49:06,245 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-09-30 20:49:06,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 20:49:06,246 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:06,246 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1] [2018-09-30 20:49:06,246 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:06,246 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:06,246 INFO L82 PathProgramCache]: Analyzing trace with hash 336984725, now seen corresponding path program 3 times [2018-09-30 20:49:06,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:06,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:06,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:06,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:06,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:06,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:06,317 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:06,317 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:06,318 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:06,328 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:49:06,341 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-30 20:49:06,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:06,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:06,452 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:06,473 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:06,473 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-09-30 20:49:06,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:49:06,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:49:06,474 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:06,474 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 11 states. [2018-09-30 20:49:06,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:06,826 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2018-09-30 20:49:06,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:49:06,826 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2018-09-30 20:49:06,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:06,828 INFO L225 Difference]: With dead ends: 23 [2018-09-30 20:49:06,828 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 20:49:06,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:49:06,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 20:49:06,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 20:49:06,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 20:49:06,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-09-30 20:49:06,833 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2018-09-30 20:49:06,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:06,833 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-09-30 20:49:06,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:49:06,834 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2018-09-30 20:49:06,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:49:06,834 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:06,834 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1] [2018-09-30 20:49:06,835 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:06,835 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:06,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1774810761, now seen corresponding path program 4 times [2018-09-30 20:49:06,835 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:06,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:06,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:06,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:06,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:06,942 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:06,943 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:06,943 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:06,958 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:49:06,985 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:49:06,986 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:06,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:07,071 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:07,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:49:07,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:49:07,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:49:07,072 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:07,072 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 7 states. [2018-09-30 20:49:07,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:07,287 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2018-09-30 20:49:07,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:49:07,288 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2018-09-30 20:49:07,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:07,289 INFO L225 Difference]: With dead ends: 24 [2018-09-30 20:49:07,289 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 20:49:07,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:49:07,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 20:49:07,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 20:49:07,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 20:49:07,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-09-30 20:49:07,295 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2018-09-30 20:49:07,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:07,295 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-09-30 20:49:07,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:49:07,295 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-09-30 20:49:07,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:49:07,296 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:07,296 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1] [2018-09-30 20:49:07,297 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:07,297 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:07,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1774810823, now seen corresponding path program 4 times [2018-09-30 20:49:07,297 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:07,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:07,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:07,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:07,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:07,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:07,373 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:07,374 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:07,374 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:07,382 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:49:07,409 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:49:07,409 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:07,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:07,481 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:07,505 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:07,505 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:49:07,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:49:07,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:49:07,506 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:07,506 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2018-09-30 20:49:07,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:07,634 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2018-09-30 20:49:07,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:49:07,635 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-09-30 20:49:07,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:07,635 INFO L225 Difference]: With dead ends: 26 [2018-09-30 20:49:07,636 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 20:49:07,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:49:07,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 20:49:07,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 20:49:07,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:49:07,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-09-30 20:49:07,641 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2018-09-30 20:49:07,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:07,642 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-09-30 20:49:07,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:49:07,642 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-09-30 20:49:07,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 20:49:07,643 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:07,643 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1] [2018-09-30 20:49:07,643 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:07,643 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:07,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1953561067, now seen corresponding path program 5 times [2018-09-30 20:49:07,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:07,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:07,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:07,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:07,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:07,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:07,721 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:07,722 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:07,722 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:07,737 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:49:07,752 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 20:49:07,753 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:07,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:07,803 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:07,825 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:07,825 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:49:07,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:49:07,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:49:07,826 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:07,826 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 8 states. [2018-09-30 20:49:07,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:07,934 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-09-30 20:49:07,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:49:07,935 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-09-30 20:49:07,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:07,936 INFO L225 Difference]: With dead ends: 27 [2018-09-30 20:49:07,936 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 20:49:07,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 20:49:07,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 20:49:07,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 20:49:07,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 20:49:07,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-09-30 20:49:07,943 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2018-09-30 20:49:07,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:07,943 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-09-30 20:49:07,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:49:07,943 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-09-30 20:49:07,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 20:49:07,944 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:07,944 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1] [2018-09-30 20:49:07,944 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:07,944 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:07,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1953561005, now seen corresponding path program 5 times [2018-09-30 20:49:07,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:07,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:07,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:07,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:07,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:08,022 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:08,023 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:08,023 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:08,033 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:49:08,048 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 20:49:08,048 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:08,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:08,125 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:08,126 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:49:08,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:49:08,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:49:08,127 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:08,127 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 9 states. [2018-09-30 20:49:08,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:08,280 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2018-09-30 20:49:08,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:49:08,281 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2018-09-30 20:49:08,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:08,282 INFO L225 Difference]: With dead ends: 29 [2018-09-30 20:49:08,282 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 20:49:08,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 20:49:08,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 20:49:08,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 20:49:08,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 20:49:08,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-09-30 20:49:08,290 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2018-09-30 20:49:08,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:08,292 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-09-30 20:49:08,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:49:08,292 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-09-30 20:49:08,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 20:49:08,293 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:08,293 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1] [2018-09-30 20:49:08,293 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:08,294 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:08,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1729447159, now seen corresponding path program 6 times [2018-09-30 20:49:08,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:08,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:08,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:08,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:08,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:08,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:08,389 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:08,390 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:08,390 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:08,397 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:49:08,410 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 20:49:08,410 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:08,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:08,522 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:08,544 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:08,544 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-30 20:49:08,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:49:08,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:49:08,545 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:08,546 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 17 states. [2018-09-30 20:49:09,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:09,100 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2018-09-30 20:49:09,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:49:09,100 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 23 [2018-09-30 20:49:09,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:09,101 INFO L225 Difference]: With dead ends: 32 [2018-09-30 20:49:09,102 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 20:49:09,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:49:09,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 20:49:09,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 20:49:09,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:49:09,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-09-30 20:49:09,109 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2018-09-30 20:49:09,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:09,109 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-09-30 20:49:09,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:49:09,109 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-09-30 20:49:09,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 20:49:09,110 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:09,110 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1] [2018-09-30 20:49:09,110 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:09,110 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:09,111 INFO L82 PathProgramCache]: Analyzing trace with hash 468808085, now seen corresponding path program 7 times [2018-09-30 20:49:09,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:09,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:09,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:09,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:09,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:09,204 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:09,204 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:09,204 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:09,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:09,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:09,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:09,299 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:09,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:09,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:49:09,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:49:09,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:49:09,331 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:09,331 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 10 states. [2018-09-30 20:49:09,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:09,431 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2018-09-30 20:49:09,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:49:09,432 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2018-09-30 20:49:09,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:09,433 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:49:09,433 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 20:49:09,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:49:09,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 20:49:09,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 20:49:09,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 20:49:09,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-09-30 20:49:09,438 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2018-09-30 20:49:09,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:09,439 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-09-30 20:49:09,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:49:09,439 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-09-30 20:49:09,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 20:49:09,440 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:09,440 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1] [2018-09-30 20:49:09,440 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:09,440 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:09,440 INFO L82 PathProgramCache]: Analyzing trace with hash 468808147, now seen corresponding path program 6 times [2018-09-30 20:49:09,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:09,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:09,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:09,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:09,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:09,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:09,566 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:09,566 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:09,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:09,576 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:49:09,600 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 20:49:09,600 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:09,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:09,690 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:09,712 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:09,713 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:49:09,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:49:09,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:49:09,713 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:09,714 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 11 states. [2018-09-30 20:49:09,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:09,837 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-09-30 20:49:09,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:49:09,838 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2018-09-30 20:49:09,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:09,839 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:49:09,839 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 20:49:09,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:49:09,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 20:49:09,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 20:49:09,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 20:49:09,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-09-30 20:49:09,844 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2018-09-30 20:49:09,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:09,844 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-09-30 20:49:09,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:49:09,844 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-09-30 20:49:09,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 20:49:09,845 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:09,845 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1] [2018-09-30 20:49:09,845 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:09,845 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:09,846 INFO L82 PathProgramCache]: Analyzing trace with hash -970547319, now seen corresponding path program 8 times [2018-09-30 20:49:09,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:09,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:09,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:09,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:09,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:09,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:10,049 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:10,049 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:10,049 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:10,059 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:49:10,098 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:49:10,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:10,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:10,440 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:10,466 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:10,467 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:49:10,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:49:10,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:49:10,467 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:10,467 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 11 states. [2018-09-30 20:49:10,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:10,566 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2018-09-30 20:49:10,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:49:10,567 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2018-09-30 20:49:10,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:10,568 INFO L225 Difference]: With dead ends: 36 [2018-09-30 20:49:10,568 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 20:49:10,569 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:49:10,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 20:49:10,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 20:49:10,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:49:10,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-09-30 20:49:10,574 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2018-09-30 20:49:10,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:10,574 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-09-30 20:49:10,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:49:10,574 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-09-30 20:49:10,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 20:49:10,575 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:10,575 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1] [2018-09-30 20:49:10,576 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:10,576 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:10,576 INFO L82 PathProgramCache]: Analyzing trace with hash -970547257, now seen corresponding path program 7 times [2018-09-30 20:49:10,576 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:10,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:10,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:10,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:10,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:10,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:10,709 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:10,710 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:10,710 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:10,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:10,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:10,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:10,853 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:10,854 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:49:10,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:49:10,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:49:10,854 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:10,854 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 12 states. [2018-09-30 20:49:10,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:10,957 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2018-09-30 20:49:10,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 20:49:10,957 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2018-09-30 20:49:10,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:10,958 INFO L225 Difference]: With dead ends: 38 [2018-09-30 20:49:10,959 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 20:49:10,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:49:10,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 20:49:10,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 20:49:10,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:49:10,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-09-30 20:49:10,963 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2018-09-30 20:49:10,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:10,964 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-09-30 20:49:10,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:49:10,964 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-09-30 20:49:10,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 20:49:10,965 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:10,965 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1] [2018-09-30 20:49:10,965 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:10,965 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:10,965 INFO L82 PathProgramCache]: Analyzing trace with hash 146095381, now seen corresponding path program 9 times [2018-09-30 20:49:10,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:10,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:10,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:10,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:10,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:11,075 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:11,075 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:11,075 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:11,082 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:49:11,225 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-09-30 20:49:11,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:11,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:11,838 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:11,860 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:11,860 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-09-30 20:49:11,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 20:49:11,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 20:49:11,861 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:11,861 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 23 states. [2018-09-30 20:49:12,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:12,692 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2018-09-30 20:49:12,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:49:12,692 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 32 [2018-09-30 20:49:12,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:12,692 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:49:12,693 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:49:12,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:49:12,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:49:12,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 20:49:12,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 20:49:12,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-09-30 20:49:12,697 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2018-09-30 20:49:12,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:12,698 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-09-30 20:49:12,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 20:49:12,698 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-09-30 20:49:12,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 20:49:12,699 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:12,699 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1] [2018-09-30 20:49:12,699 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:12,699 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:12,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1527063561, now seen corresponding path program 10 times [2018-09-30 20:49:12,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:12,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:12,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:12,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:12,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:12,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:12,862 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:12,862 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:12,862 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:12,872 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:49:12,884 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:49:12,885 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:12,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:13,022 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:13,043 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:13,043 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-09-30 20:49:13,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 20:49:13,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 20:49:13,044 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:13,045 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 25 states. [2018-09-30 20:49:13,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:13,578 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2018-09-30 20:49:13,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 20:49:13,579 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 35 [2018-09-30 20:49:13,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:13,580 INFO L225 Difference]: With dead ends: 44 [2018-09-30 20:49:13,580 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 20:49:13,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:49:13,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 20:49:13,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 20:49:13,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 20:49:13,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-09-30 20:49:13,585 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2018-09-30 20:49:13,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:13,585 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-09-30 20:49:13,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 20:49:13,586 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-09-30 20:49:13,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 20:49:13,586 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:13,587 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1] [2018-09-30 20:49:13,587 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:13,587 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:13,587 INFO L82 PathProgramCache]: Analyzing trace with hash 458385557, now seen corresponding path program 11 times [2018-09-30 20:49:13,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:13,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:13,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:13,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:13,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:13,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:13,677 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:13,677 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:13,677 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:13,685 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:49:13,782 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 20:49:13,782 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:13,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:14,003 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:14,023 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:14,024 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 20:49:14,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:49:14,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:49:14,024 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:14,024 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 14 states. [2018-09-30 20:49:14,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:14,137 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2018-09-30 20:49:14,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 20:49:14,137 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2018-09-30 20:49:14,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:14,138 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:49:14,138 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:49:14,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:49:14,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:49:14,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 20:49:14,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 20:49:14,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-09-30 20:49:14,143 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2018-09-30 20:49:14,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:14,143 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-09-30 20:49:14,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:49:14,144 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-09-30 20:49:14,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 20:49:14,144 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:14,144 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1] [2018-09-30 20:49:14,145 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:14,145 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:14,145 INFO L82 PathProgramCache]: Analyzing trace with hash 458385619, now seen corresponding path program 8 times [2018-09-30 20:49:14,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:14,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:14,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:14,146 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:14,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:14,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:14,425 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:14,425 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:14,425 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:14,434 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:49:14,449 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:49:14,450 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:14,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:14,590 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:14,590 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 20:49:14,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:49:14,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:49:14,591 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:14,591 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 15 states. [2018-09-30 20:49:14,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:14,749 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2018-09-30 20:49:14,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:49:14,750 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2018-09-30 20:49:14,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:14,751 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:49:14,751 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:49:14,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:49:14,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:49:14,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 20:49:14,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 20:49:14,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-09-30 20:49:14,757 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2018-09-30 20:49:14,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:14,757 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-09-30 20:49:14,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:49:14,757 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-09-30 20:49:14,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 20:49:14,758 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:14,758 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1] [2018-09-30 20:49:14,758 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:14,759 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:14,759 INFO L82 PathProgramCache]: Analyzing trace with hash 2064533641, now seen corresponding path program 12 times [2018-09-30 20:49:14,759 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:14,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:14,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:14,760 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:14,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:14,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:15,468 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:15,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:15,476 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:49:15,496 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-30 20:49:15,496 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:15,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:16,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:16,160 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-09-30 20:49:16,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 20:49:16,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 20:49:16,161 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:16,161 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 29 states. [2018-09-30 20:49:16,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:16,882 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2018-09-30 20:49:16,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:49:16,883 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 41 [2018-09-30 20:49:16,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:16,884 INFO L225 Difference]: With dead ends: 50 [2018-09-30 20:49:16,884 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 20:49:16,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-09-30 20:49:16,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 20:49:16,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 20:49:16,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 20:49:16,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-09-30 20:49:16,891 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 41 [2018-09-30 20:49:16,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:16,892 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-09-30 20:49:16,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 20:49:16,892 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-09-30 20:49:16,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 20:49:16,892 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:16,893 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1] [2018-09-30 20:49:16,893 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:16,893 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:16,893 INFO L82 PathProgramCache]: Analyzing trace with hash 591459349, now seen corresponding path program 13 times [2018-09-30 20:49:16,895 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:16,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:16,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:16,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:16,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:16,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:17,030 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:17,031 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:17,031 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:17,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:17,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:17,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:17,148 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:17,171 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:17,171 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 20:49:17,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:49:17,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:49:17,172 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:17,172 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 16 states. [2018-09-30 20:49:17,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:17,297 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2018-09-30 20:49:17,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 20:49:17,298 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-09-30 20:49:17,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:17,299 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:49:17,299 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:49:17,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:49:17,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:49:17,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 20:49:17,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 20:49:17,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2018-09-30 20:49:17,303 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2018-09-30 20:49:17,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:17,303 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2018-09-30 20:49:17,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:49:17,304 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2018-09-30 20:49:17,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 20:49:17,304 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:17,304 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1] [2018-09-30 20:49:17,305 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:17,305 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:17,305 INFO L82 PathProgramCache]: Analyzing trace with hash 591459411, now seen corresponding path program 9 times [2018-09-30 20:49:17,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:17,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:17,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:17,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:17,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:17,460 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:17,461 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:17,461 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:17,469 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:49:17,491 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 20:49:17,491 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:17,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:17,606 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:17,628 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:17,629 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 20:49:17,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:49:17,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:49:17,629 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:17,629 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 17 states. [2018-09-30 20:49:17,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:17,806 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2018-09-30 20:49:17,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:49:17,806 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2018-09-30 20:49:17,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:17,807 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:49:17,808 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:49:17,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:49:17,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:49:17,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 20:49:17,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 20:49:17,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-09-30 20:49:17,812 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2018-09-30 20:49:17,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:17,812 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-09-30 20:49:17,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:49:17,812 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-09-30 20:49:17,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 20:49:17,813 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:17,813 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1] [2018-09-30 20:49:17,813 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:17,813 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:17,814 INFO L82 PathProgramCache]: Analyzing trace with hash -2083910391, now seen corresponding path program 14 times [2018-09-30 20:49:17,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:17,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:17,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:17,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:17,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:17,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:17,951 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 15 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:17,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:17,952 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:17,959 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:49:17,997 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:49:17,998 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:18,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:18,078 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 15 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:18,098 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:18,098 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 20:49:18,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:49:18,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:49:18,098 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:18,099 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 17 states. [2018-09-30 20:49:18,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:18,275 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2018-09-30 20:49:18,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:49:18,275 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2018-09-30 20:49:18,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:18,276 INFO L225 Difference]: With dead ends: 54 [2018-09-30 20:49:18,276 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 20:49:18,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:49:18,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 20:49:18,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 20:49:18,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 20:49:18,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-09-30 20:49:18,281 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2018-09-30 20:49:18,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:18,281 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-09-30 20:49:18,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:49:18,282 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-09-30 20:49:18,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 20:49:18,282 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:18,282 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1] [2018-09-30 20:49:18,283 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:18,283 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:18,283 INFO L82 PathProgramCache]: Analyzing trace with hash -2083910329, now seen corresponding path program 10 times [2018-09-30 20:49:18,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:18,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:18,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:18,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:18,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:18,407 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:18,407 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:18,407 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:18,414 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:49:18,428 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:49:18,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:18,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:18,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:18,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 20:49:18,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:49:18,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:49:18,578 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:18,578 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 18 states. [2018-09-30 20:49:18,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:18,720 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2018-09-30 20:49:18,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:49:18,720 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2018-09-30 20:49:18,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:18,721 INFO L225 Difference]: With dead ends: 56 [2018-09-30 20:49:18,721 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 20:49:18,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:49:18,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 20:49:18,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 20:49:18,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 20:49:18,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-09-30 20:49:18,726 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2018-09-30 20:49:18,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:18,726 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-09-30 20:49:18,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:49:18,726 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-09-30 20:49:18,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 20:49:18,726 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:18,727 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1] [2018-09-30 20:49:18,727 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:18,727 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:18,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1979244437, now seen corresponding path program 15 times [2018-09-30 20:49:18,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:18,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:18,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:18,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:18,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:18,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 16 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:19,271 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:19,271 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:19,278 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:49:19,305 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-09-30 20:49:19,305 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:19,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:19,552 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:19,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-09-30 20:49:19,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 20:49:19,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 20:49:19,553 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:19,553 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 35 states. [2018-09-30 20:49:20,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:20,552 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2018-09-30 20:49:20,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 20:49:20,553 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 50 [2018-09-30 20:49:20,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:20,553 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:49:20,554 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:49:20,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:49:20,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:49:20,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 20:49:20,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 20:49:20,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-09-30 20:49:20,558 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2018-09-30 20:49:20,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:20,558 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-09-30 20:49:20,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 20:49:20,559 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-09-30 20:49:20,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 20:49:20,559 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:20,559 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1] [2018-09-30 20:49:20,559 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:20,560 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:20,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1933545079, now seen corresponding path program 16 times [2018-09-30 20:49:20,560 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:20,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:20,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:20,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:20,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:20,687 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 17 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:20,687 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:20,687 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:20,695 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:49:20,712 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:49:20,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:20,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:20,817 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 17 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:20,837 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:20,837 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 20:49:20,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 20:49:20,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 20:49:20,837 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:20,838 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 19 states. [2018-09-30 20:49:20,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:20,991 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2018-09-30 20:49:20,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 20:49:20,991 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2018-09-30 20:49:20,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:20,992 INFO L225 Difference]: With dead ends: 60 [2018-09-30 20:49:20,992 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 20:49:20,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:49:20,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 20:49:20,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 20:49:20,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 20:49:20,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-09-30 20:49:20,996 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2018-09-30 20:49:20,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:20,997 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-09-30 20:49:20,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 20:49:20,997 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-09-30 20:49:20,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 20:49:20,997 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:20,997 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1] [2018-09-30 20:49:20,997 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:20,998 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:20,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1933545017, now seen corresponding path program 11 times [2018-09-30 20:49:20,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:20,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:20,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:20,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:20,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:21,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:21,241 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:21,242 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:21,242 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:21,249 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:49:21,278 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 20:49:21,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:21,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:21,421 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:21,421 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 20:49:21,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:49:21,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:49:21,422 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:21,422 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 20 states. [2018-09-30 20:49:21,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:21,582 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2018-09-30 20:49:21,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 20:49:21,582 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2018-09-30 20:49:21,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:21,583 INFO L225 Difference]: With dead ends: 62 [2018-09-30 20:49:21,583 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 20:49:21,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:49:21,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 20:49:21,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 20:49:21,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 20:49:21,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-09-30 20:49:21,587 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 53 [2018-09-30 20:49:21,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:21,588 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-09-30 20:49:21,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:49:21,588 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-09-30 20:49:21,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 20:49:21,588 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:21,589 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1] [2018-09-30 20:49:21,589 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:21,589 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:21,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1861364501, now seen corresponding path program 17 times [2018-09-30 20:49:21,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:21,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:21,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:21,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:21,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:21,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:21,742 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:21,742 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:21,750 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:49:21,804 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 20:49:21,804 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:21,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:21,958 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:21,958 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 20:49:21,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:49:21,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:49:21,959 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:21,959 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 20 states. [2018-09-30 20:49:22,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:22,114 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2018-09-30 20:49:22,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 20:49:22,115 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2018-09-30 20:49:22,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:22,116 INFO L225 Difference]: With dead ends: 63 [2018-09-30 20:49:22,116 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:49:22,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:49:22,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:49:22,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 20:49:22,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 20:49:22,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-09-30 20:49:22,120 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2018-09-30 20:49:22,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:22,120 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-09-30 20:49:22,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:49:22,120 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-09-30 20:49:22,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 20:49:22,121 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:22,121 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1] [2018-09-30 20:49:22,121 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:22,121 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:22,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1861364563, now seen corresponding path program 12 times [2018-09-30 20:49:22,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:22,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:22,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:22,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:22,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:22,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:22,366 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:22,367 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:22,367 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:22,385 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:49:22,412 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 20:49:22,412 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:22,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:22,731 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:22,751 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:22,751 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 20:49:22,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 20:49:22,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 20:49:22,752 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:22,752 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 21 states. [2018-09-30 20:49:23,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:23,023 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2018-09-30 20:49:23,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 20:49:23,023 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2018-09-30 20:49:23,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:23,024 INFO L225 Difference]: With dead ends: 65 [2018-09-30 20:49:23,024 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 20:49:23,025 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:49:23,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 20:49:23,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 20:49:23,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 20:49:23,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-09-30 20:49:23,029 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 56 [2018-09-30 20:49:23,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:23,029 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-09-30 20:49:23,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 20:49:23,029 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-09-30 20:49:23,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 20:49:23,030 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:23,030 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1] [2018-09-30 20:49:23,030 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:23,030 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:23,030 INFO L82 PathProgramCache]: Analyzing trace with hash -411470327, now seen corresponding path program 18 times [2018-09-30 20:49:23,031 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:23,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:23,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:23,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:23,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:23,246 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 19 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:23,246 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:23,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:23,254 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:49:23,284 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-30 20:49:23,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:23,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:23,547 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:23,571 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:23,571 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-09-30 20:49:23,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 20:49:23,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 20:49:23,572 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:23,572 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 41 states. [2018-09-30 20:49:24,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:24,505 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2018-09-30 20:49:24,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 20:49:24,505 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 59 [2018-09-30 20:49:24,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:24,506 INFO L225 Difference]: With dead ends: 68 [2018-09-30 20:49:24,507 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 20:49:24,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:49:24,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 20:49:24,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 20:49:24,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 20:49:24,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-09-30 20:49:24,510 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 59 [2018-09-30 20:49:24,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:24,511 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-09-30 20:49:24,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 20:49:24,511 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-09-30 20:49:24,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 20:49:24,512 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:24,512 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1] [2018-09-30 20:49:24,512 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:24,512 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:24,512 INFO L82 PathProgramCache]: Analyzing trace with hash -274409835, now seen corresponding path program 19 times [2018-09-30 20:49:24,512 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:24,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:24,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:24,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:24,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:24,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:25,001 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 20 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:25,001 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:25,001 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:25,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:25,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:25,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:25,126 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 20 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:25,146 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:25,146 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 20:49:25,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:49:25,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:49:25,147 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:25,147 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 22 states. [2018-09-30 20:49:25,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:25,342 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2018-09-30 20:49:25,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 20:49:25,343 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 62 [2018-09-30 20:49:25,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:25,344 INFO L225 Difference]: With dead ends: 69 [2018-09-30 20:49:25,344 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 20:49:25,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:49:25,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 20:49:25,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 20:49:25,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 20:49:25,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-09-30 20:49:25,348 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2018-09-30 20:49:25,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:25,348 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-09-30 20:49:25,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:49:25,349 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-09-30 20:49:25,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 20:49:25,349 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:25,349 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1] [2018-09-30 20:49:25,349 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:25,349 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:25,350 INFO L82 PathProgramCache]: Analyzing trace with hash -274409773, now seen corresponding path program 13 times [2018-09-30 20:49:25,350 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:25,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:25,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:25,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:25,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:25,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:25,517 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:25,517 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:25,517 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:25,524 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:25,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:25,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:25,645 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:25,666 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:25,666 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 20:49:25,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 20:49:25,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 20:49:25,667 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:25,667 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 23 states. [2018-09-30 20:49:25,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:25,779 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2018-09-30 20:49:25,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:49:25,780 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 62 [2018-09-30 20:49:25,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:25,781 INFO L225 Difference]: With dead ends: 71 [2018-09-30 20:49:25,781 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 20:49:25,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:49:25,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 20:49:25,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 20:49:25,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 20:49:25,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2018-09-30 20:49:25,785 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 62 [2018-09-30 20:49:25,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:25,785 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2018-09-30 20:49:25,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 20:49:25,785 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2018-09-30 20:49:25,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 20:49:25,786 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:25,786 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1] [2018-09-30 20:49:25,786 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:25,786 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:25,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1619191159, now seen corresponding path program 20 times [2018-09-30 20:49:25,787 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:25,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:25,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:25,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:25,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:25,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:25,978 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 21 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:25,978 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:25,978 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:25,985 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:49:26,007 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:49:26,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:26,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:26,122 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 21 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:26,142 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:26,142 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 20:49:26,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 20:49:26,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 20:49:26,142 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:26,143 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 23 states. [2018-09-30 20:49:26,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:26,327 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2018-09-30 20:49:26,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:49:26,328 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2018-09-30 20:49:26,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:26,329 INFO L225 Difference]: With dead ends: 72 [2018-09-30 20:49:26,329 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 20:49:26,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:49:26,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 20:49:26,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 20:49:26,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 20:49:26,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2018-09-30 20:49:26,334 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2018-09-30 20:49:26,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:26,334 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2018-09-30 20:49:26,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 20:49:26,334 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2018-09-30 20:49:26,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 20:49:26,335 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:26,335 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1] [2018-09-30 20:49:26,335 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:26,335 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:26,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1619191097, now seen corresponding path program 14 times [2018-09-30 20:49:26,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:26,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:26,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:26,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:26,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:26,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:26,483 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:26,483 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:26,490 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:49:26,511 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:49:26,511 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:26,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:26,625 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:26,644 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:26,644 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 20:49:26,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 20:49:26,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 20:49:26,645 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:26,645 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 24 states. [2018-09-30 20:49:26,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:26,746 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2018-09-30 20:49:26,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 20:49:26,746 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2018-09-30 20:49:26,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:26,747 INFO L225 Difference]: With dead ends: 74 [2018-09-30 20:49:26,747 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 20:49:26,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:49:26,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 20:49:26,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-30 20:49:26,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 20:49:26,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-09-30 20:49:26,751 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 65 [2018-09-30 20:49:26,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:26,751 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-09-30 20:49:26,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 20:49:26,751 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-09-30 20:49:26,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 20:49:26,752 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:26,752 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1] [2018-09-30 20:49:26,752 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:26,752 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:26,752 INFO L82 PathProgramCache]: Analyzing trace with hash -544677355, now seen corresponding path program 21 times [2018-09-30 20:49:26,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:26,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:26,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:26,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:26,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:26,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:26,929 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 22 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:26,929 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:26,929 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:26,938 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:49:26,973 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-09-30 20:49:26,974 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:26,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:27,235 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:27,255 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:27,255 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-09-30 20:49:27,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 20:49:27,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 20:49:27,256 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:27,256 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 47 states. [2018-09-30 20:49:28,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:28,644 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2018-09-30 20:49:28,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 20:49:28,644 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 68 [2018-09-30 20:49:28,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:28,645 INFO L225 Difference]: With dead ends: 77 [2018-09-30 20:49:28,645 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 20:49:28,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:49:28,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 20:49:28,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 20:49:28,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 20:49:28,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-09-30 20:49:28,648 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 68 [2018-09-30 20:49:28,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:28,649 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-09-30 20:49:28,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 20:49:28,649 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-09-30 20:49:28,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-30 20:49:28,650 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:28,650 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1] [2018-09-30 20:49:28,650 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:28,650 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:28,650 INFO L82 PathProgramCache]: Analyzing trace with hash -95199479, now seen corresponding path program 22 times [2018-09-30 20:49:28,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:28,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:28,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:28,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:28,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:28,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:29,168 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 23 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:29,169 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:29,169 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:29,176 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:49:29,199 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:49:29,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:29,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:29,455 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:29,476 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:29,476 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-09-30 20:49:29,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 20:49:29,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 20:49:29,477 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:29,477 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 49 states. [2018-09-30 20:49:30,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:30,776 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2018-09-30 20:49:30,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 20:49:30,777 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 71 [2018-09-30 20:49:30,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:30,778 INFO L225 Difference]: With dead ends: 80 [2018-09-30 20:49:30,778 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 20:49:30,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:49:30,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 20:49:30,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 20:49:30,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 20:49:30,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-09-30 20:49:30,782 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 71 [2018-09-30 20:49:30,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:30,783 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-09-30 20:49:30,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 20:49:30,783 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-09-30 20:49:30,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 20:49:30,783 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:30,783 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1] [2018-09-30 20:49:30,783 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:30,784 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:30,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1407824491, now seen corresponding path program 23 times [2018-09-30 20:49:30,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:30,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:30,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:30,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:30,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:30,934 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 24 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:30,934 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:30,935 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 [2018-09-30 20:49:30,942 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:49:30,981 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-30 20:49:30,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:30,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:31,098 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 24 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:31,118 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:31,119 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 20:49:31,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 20:49:31,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 20:49:31,119 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:31,119 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 26 states. [2018-09-30 20:49:31,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:31,349 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2018-09-30 20:49:31,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 20:49:31,349 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 74 [2018-09-30 20:49:31,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:31,350 INFO L225 Difference]: With dead ends: 81 [2018-09-30 20:49:31,350 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 20:49:31,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:49:31,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 20:49:31,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 20:49:31,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 20:49:31,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2018-09-30 20:49:31,354 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2018-09-30 20:49:31,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:31,355 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2018-09-30 20:49:31,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 20:49:31,355 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2018-09-30 20:49:31,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 20:49:31,355 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:31,356 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1] [2018-09-30 20:49:31,356 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:31,356 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:31,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1407824429, now seen corresponding path program 15 times [2018-09-30 20:49:31,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:31,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:31,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:31,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:31,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:31,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:31,679 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:31,680 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:31,686 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:49:31,727 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-09-30 20:49:31,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:31,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:31,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:31,929 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 20:49:31,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 20:49:31,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 20:49:31,929 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:31,930 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 27 states. [2018-09-30 20:49:32,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:32,155 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2018-09-30 20:49:32,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:49:32,155 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 74 [2018-09-30 20:49:32,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:32,156 INFO L225 Difference]: With dead ends: 83 [2018-09-30 20:49:32,156 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 20:49:32,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:49:32,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 20:49:32,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 20:49:32,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 20:49:32,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2018-09-30 20:49:32,160 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 74 [2018-09-30 20:49:32,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:32,160 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2018-09-30 20:49:32,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 20:49:32,160 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2018-09-30 20:49:32,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-30 20:49:32,161 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:32,161 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1] [2018-09-30 20:49:32,161 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:32,161 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:32,161 INFO L82 PathProgramCache]: Analyzing trace with hash -142326903, now seen corresponding path program 24 times [2018-09-30 20:49:32,161 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:32,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:32,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:32,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:32,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:32,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:32,611 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 25 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:32,611 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:32,611 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:32,619 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:49:32,662 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-30 20:49:32,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:32,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:32,942 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:32,942 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-09-30 20:49:32,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 20:49:32,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 20:49:32,942 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:32,943 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 53 states. [2018-09-30 20:49:34,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:34,578 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2018-09-30 20:49:34,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 20:49:34,578 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 77 [2018-09-30 20:49:34,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:34,579 INFO L225 Difference]: With dead ends: 86 [2018-09-30 20:49:34,579 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 20:49:34,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-09-30 20:49:34,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 20:49:34,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-30 20:49:34,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 20:49:34,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2018-09-30 20:49:34,584 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 77 [2018-09-30 20:49:34,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:34,584 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2018-09-30 20:49:34,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 20:49:34,584 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2018-09-30 20:49:34,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 20:49:34,585 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:34,585 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1] [2018-09-30 20:49:34,585 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:34,585 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:34,585 INFO L82 PathProgramCache]: Analyzing trace with hash -926607083, now seen corresponding path program 25 times [2018-09-30 20:49:34,585 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:34,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:34,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:34,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:34,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:34,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 26 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:35,084 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:35,084 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:35,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:35,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:35,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 26 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:35,270 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:35,270 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 20:49:35,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 20:49:35,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 20:49:35,270 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:35,271 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 28 states. [2018-09-30 20:49:35,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:35,515 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2018-09-30 20:49:35,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 20:49:35,515 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 80 [2018-09-30 20:49:35,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:35,517 INFO L225 Difference]: With dead ends: 87 [2018-09-30 20:49:35,517 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 20:49:35,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:49:35,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 20:49:35,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 20:49:35,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 20:49:35,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2018-09-30 20:49:35,522 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 80 [2018-09-30 20:49:35,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:35,522 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2018-09-30 20:49:35,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 20:49:35,522 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2018-09-30 20:49:35,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 20:49:35,523 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:35,523 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1] [2018-09-30 20:49:35,523 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:35,523 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:35,524 INFO L82 PathProgramCache]: Analyzing trace with hash -926607021, now seen corresponding path program 16 times [2018-09-30 20:49:35,524 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:35,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:35,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:35,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:35,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:35,716 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:35,716 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:35,724 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:49:35,749 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:49:35,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:35,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:35,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:35,889 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:35,889 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 20:49:35,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 20:49:35,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 20:49:35,890 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:35,890 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 29 states. [2018-09-30 20:49:36,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:36,048 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2018-09-30 20:49:36,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:49:36,049 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 80 [2018-09-30 20:49:36,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:36,050 INFO L225 Difference]: With dead ends: 89 [2018-09-30 20:49:36,050 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 20:49:36,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:49:36,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 20:49:36,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 20:49:36,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 20:49:36,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-09-30 20:49:36,054 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 80 [2018-09-30 20:49:36,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:36,055 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-09-30 20:49:36,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 20:49:36,055 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-09-30 20:49:36,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 20:49:36,055 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:36,055 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1] [2018-09-30 20:49:36,055 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:36,056 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:36,056 INFO L82 PathProgramCache]: Analyzing trace with hash -795359223, now seen corresponding path program 26 times [2018-09-30 20:49:36,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:36,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:36,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:36,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:36,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 27 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:36,255 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:36,255 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:36,262 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:49:36,288 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:49:36,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:36,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:36,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 27 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:36,460 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:36,460 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 20:49:36,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 20:49:36,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 20:49:36,461 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:36,461 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 29 states. [2018-09-30 20:49:36,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:36,695 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2018-09-30 20:49:36,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:49:36,696 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 83 [2018-09-30 20:49:36,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:36,697 INFO L225 Difference]: With dead ends: 90 [2018-09-30 20:49:36,697 INFO L226 Difference]: Without dead ends: 86 [2018-09-30 20:49:36,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:49:36,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-30 20:49:36,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-30 20:49:36,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-30 20:49:36,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-09-30 20:49:36,701 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2018-09-30 20:49:36,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:36,701 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-09-30 20:49:36,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 20:49:36,701 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-09-30 20:49:36,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 20:49:36,701 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:36,701 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 1, 1] [2018-09-30 20:49:36,702 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:36,702 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:36,702 INFO L82 PathProgramCache]: Analyzing trace with hash -795359161, now seen corresponding path program 17 times [2018-09-30 20:49:36,702 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:36,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:36,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:36,703 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:36,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:36,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:37,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:37,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:37,226 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:37,233 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:49:37,278 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-30 20:49:37,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:37,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:37,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:37,460 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:37,460 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 20:49:37,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 20:49:37,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 20:49:37,461 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:37,461 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 30 states. [2018-09-30 20:49:37,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:37,644 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2018-09-30 20:49:37,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 20:49:37,644 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2018-09-30 20:49:37,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:37,645 INFO L225 Difference]: With dead ends: 92 [2018-09-30 20:49:37,645 INFO L226 Difference]: Without dead ends: 88 [2018-09-30 20:49:37,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:49:37,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-30 20:49:37,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-30 20:49:37,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-30 20:49:37,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2018-09-30 20:49:37,649 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 83 [2018-09-30 20:49:37,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:37,649 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2018-09-30 20:49:37,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 20:49:37,650 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2018-09-30 20:49:37,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 20:49:37,650 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:37,650 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 1, 1, 1] [2018-09-30 20:49:37,650 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:37,650 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:37,651 INFO L82 PathProgramCache]: Analyzing trace with hash 789398677, now seen corresponding path program 27 times [2018-09-30 20:49:37,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:37,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:37,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:37,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:37,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:37,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 28 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:37,898 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:37,898 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:37,905 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:49:37,962 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-09-30 20:49:37,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:37,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:38,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:38,518 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:38,519 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-09-30 20:49:38,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 20:49:38,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 20:49:38,519 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:38,519 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 59 states. [2018-09-30 20:49:40,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:40,210 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2018-09-30 20:49:40,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 20:49:40,210 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 86 [2018-09-30 20:49:40,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:40,211 INFO L225 Difference]: With dead ends: 95 [2018-09-30 20:49:40,211 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 20:49:40,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-09-30 20:49:40,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 20:49:40,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 20:49:40,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 20:49:40,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-09-30 20:49:40,214 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2018-09-30 20:49:40,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:40,214 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-09-30 20:49:40,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 20:49:40,214 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-09-30 20:49:40,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-30 20:49:40,215 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:40,215 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 1, 1, 1] [2018-09-30 20:49:40,215 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:40,215 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:40,216 INFO L82 PathProgramCache]: Analyzing trace with hash 2031479945, now seen corresponding path program 28 times [2018-09-30 20:49:40,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:40,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:40,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:40,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:40,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:40,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 29 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:40,451 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:40,452 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:40,460 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:49:40,492 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:49:40,492 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:40,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:40,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 29 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:40,681 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:40,681 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 20:49:40,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 20:49:40,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 20:49:40,682 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:40,682 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 31 states. [2018-09-30 20:49:40,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:40,967 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2018-09-30 20:49:40,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 20:49:40,967 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 89 [2018-09-30 20:49:40,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:40,968 INFO L225 Difference]: With dead ends: 96 [2018-09-30 20:49:40,968 INFO L226 Difference]: Without dead ends: 92 [2018-09-30 20:49:40,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:49:40,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-30 20:49:40,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-30 20:49:40,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-30 20:49:40,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2018-09-30 20:49:40,973 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2018-09-30 20:49:40,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:40,973 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2018-09-30 20:49:40,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 20:49:40,974 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2018-09-30 20:49:40,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-30 20:49:40,974 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:40,974 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 1, 1] [2018-09-30 20:49:40,974 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:40,975 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:40,975 INFO L82 PathProgramCache]: Analyzing trace with hash 2031480007, now seen corresponding path program 18 times [2018-09-30 20:49:40,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:40,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:40,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:40,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:40,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:41,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:41,298 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:41,298 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:41,307 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:49:41,353 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2018-09-30 20:49:41,353 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:41,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:41,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:41,992 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:41,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 20:49:41,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 20:49:41,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 20:49:41,993 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:41,993 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 32 states. [2018-09-30 20:49:42,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:42,256 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2018-09-30 20:49:42,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 20:49:42,257 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 89 [2018-09-30 20:49:42,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:42,258 INFO L225 Difference]: With dead ends: 98 [2018-09-30 20:49:42,258 INFO L226 Difference]: Without dead ends: 94 [2018-09-30 20:49:42,258 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:49:42,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-30 20:49:42,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-30 20:49:42,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-30 20:49:42,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-09-30 20:49:42,264 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 89 [2018-09-30 20:49:42,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:42,264 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-09-30 20:49:42,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 20:49:42,264 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-09-30 20:49:42,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 20:49:42,265 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:42,265 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1] [2018-09-30 20:49:42,265 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:42,265 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:42,265 INFO L82 PathProgramCache]: Analyzing trace with hash -563687403, now seen corresponding path program 29 times [2018-09-30 20:49:42,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:42,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:42,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:42,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:42,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:42,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 30 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:42,624 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:42,624 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:42,631 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:49:42,691 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-30 20:49:42,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:42,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:42,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 30 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:42,863 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:42,863 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 20:49:42,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 20:49:42,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 20:49:42,864 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:42,864 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 32 states. [2018-09-30 20:49:43,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:43,275 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2018-09-30 20:49:43,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 20:49:43,275 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 92 [2018-09-30 20:49:43,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:43,276 INFO L225 Difference]: With dead ends: 99 [2018-09-30 20:49:43,276 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 20:49:43,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:49:43,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 20:49:43,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 20:49:43,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 20:49:43,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2018-09-30 20:49:43,280 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 92 [2018-09-30 20:49:43,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:43,281 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2018-09-30 20:49:43,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 20:49:43,281 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2018-09-30 20:49:43,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 20:49:43,281 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:43,281 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1] [2018-09-30 20:49:43,282 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:43,282 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:43,282 INFO L82 PathProgramCache]: Analyzing trace with hash -563687341, now seen corresponding path program 19 times [2018-09-30 20:49:43,282 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:43,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:43,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:43,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:43,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:44,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:44,870 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:44,870 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:44,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:44,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:44,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:45,067 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:45,067 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 20:49:45,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 20:49:45,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 20:49:45,068 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:45,068 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 33 states. [2018-09-30 20:49:45,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:45,328 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2018-09-30 20:49:45,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 20:49:45,329 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 92 [2018-09-30 20:49:45,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:45,330 INFO L225 Difference]: With dead ends: 101 [2018-09-30 20:49:45,330 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 20:49:45,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-09-30 20:49:45,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 20:49:45,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-30 20:49:45,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 20:49:45,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2018-09-30 20:49:45,333 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 92 [2018-09-30 20:49:45,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:45,334 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2018-09-30 20:49:45,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 20:49:45,334 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2018-09-30 20:49:45,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-30 20:49:45,334 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:45,334 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 1, 1, 1] [2018-09-30 20:49:45,334 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:45,335 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:45,335 INFO L82 PathProgramCache]: Analyzing trace with hash 512143625, now seen corresponding path program 30 times [2018-09-30 20:49:45,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:45,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:45,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:45,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:45,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:45,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:45,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 31 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:45,599 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:45,600 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:45,607 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:49:45,662 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-09-30 20:49:45,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:45,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:46,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:46,082 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:46,082 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-09-30 20:49:46,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 20:49:46,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 20:49:46,083 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:46,083 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 65 states. [2018-09-30 20:49:47,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:47,811 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2018-09-30 20:49:47,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 20:49:47,812 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 95 [2018-09-30 20:49:47,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:47,813 INFO L225 Difference]: With dead ends: 104 [2018-09-30 20:49:47,814 INFO L226 Difference]: Without dead ends: 100 [2018-09-30 20:49:47,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-09-30 20:49:47,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-30 20:49:47,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-30 20:49:47,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 20:49:47,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-09-30 20:49:47,818 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 95 [2018-09-30 20:49:47,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:47,818 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-09-30 20:49:47,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 20:49:47,818 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-09-30 20:49:47,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 20:49:47,819 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:47,819 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 1, 1, 1] [2018-09-30 20:49:47,819 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:47,819 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:47,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1548336021, now seen corresponding path program 31 times [2018-09-30 20:49:47,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:47,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:47,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:47,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:47,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:48,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 32 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:48,205 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:48,205 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:48,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:48,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:48,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:48,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 32 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:48,601 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:48,601 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 20:49:48,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 20:49:48,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 20:49:48,601 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:48,602 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 34 states. [2018-09-30 20:49:48,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:48,829 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2018-09-30 20:49:48,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 20:49:48,829 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 98 [2018-09-30 20:49:48,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:48,830 INFO L225 Difference]: With dead ends: 105 [2018-09-30 20:49:48,830 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 20:49:48,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:49:48,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 20:49:48,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 20:49:48,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 20:49:48,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-09-30 20:49:48,835 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2018-09-30 20:49:48,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:48,836 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-09-30 20:49:48,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 20:49:48,836 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-09-30 20:49:48,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 20:49:48,837 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:48,837 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 1, 1] [2018-09-30 20:49:48,837 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:48,837 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:48,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1548336083, now seen corresponding path program 20 times [2018-09-30 20:49:48,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:48,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:48,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:48,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:48,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:49,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:49,170 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:49,170 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:49,179 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:49:49,212 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:49:49,213 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:49,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:49,408 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:49,408 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 20:49:49,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 20:49:49,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 20:49:49,409 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:49,409 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 35 states. [2018-09-30 20:49:49,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:49,698 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2018-09-30 20:49:49,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 20:49:49,699 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 98 [2018-09-30 20:49:49,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:49,700 INFO L225 Difference]: With dead ends: 107 [2018-09-30 20:49:49,700 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 20:49:49,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:49:49,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 20:49:49,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 20:49:49,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 20:49:49,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2018-09-30 20:49:49,706 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 98 [2018-09-30 20:49:49,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:49,706 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2018-09-30 20:49:49,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 20:49:49,706 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2018-09-30 20:49:49,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-30 20:49:49,707 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:49,707 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 1, 1, 1] [2018-09-30 20:49:49,707 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:49,707 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:49,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1468918391, now seen corresponding path program 32 times [2018-09-30 20:49:49,708 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:49,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:49,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:49,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:49,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:50,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 33 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:50,329 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:50,329 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:50,338 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:49:50,391 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:49:50,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:50,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 33 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:50,642 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:50,642 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 20:49:50,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 20:49:50,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 20:49:50,643 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:50,643 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 35 states. [2018-09-30 20:49:50,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:50,870 INFO L93 Difference]: Finished difference Result 108 states and 113 transitions. [2018-09-30 20:49:50,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 20:49:50,871 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 101 [2018-09-30 20:49:50,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:50,872 INFO L225 Difference]: With dead ends: 108 [2018-09-30 20:49:50,872 INFO L226 Difference]: Without dead ends: 104 [2018-09-30 20:49:50,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:49:50,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-30 20:49:50,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-30 20:49:50,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-30 20:49:50,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2018-09-30 20:49:50,878 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 101 [2018-09-30 20:49:50,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:50,878 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2018-09-30 20:49:50,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 20:49:50,878 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2018-09-30 20:49:50,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-30 20:49:50,879 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:50,879 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 1, 1] [2018-09-30 20:49:50,879 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:50,879 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:50,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1468918329, now seen corresponding path program 21 times [2018-09-30 20:49:50,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:50,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:50,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:50,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:50,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:50,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:51,152 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:51,152 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:51,159 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:49:51,215 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-30 20:49:51,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:51,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:51,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:51,443 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:51,443 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 20:49:51,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 20:49:51,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 20:49:51,444 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:51,444 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 36 states. [2018-09-30 20:49:51,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:51,741 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2018-09-30 20:49:51,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 20:49:51,741 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 101 [2018-09-30 20:49:51,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:51,746 INFO L225 Difference]: With dead ends: 110 [2018-09-30 20:49:51,746 INFO L226 Difference]: Without dead ends: 106 [2018-09-30 20:49:51,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:49:51,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-30 20:49:51,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-30 20:49:51,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-30 20:49:51,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-09-30 20:49:51,749 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 101 [2018-09-30 20:49:51,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:51,750 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-09-30 20:49:51,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 20:49:51,750 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-09-30 20:49:51,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 20:49:51,751 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:51,751 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 1, 1, 1] [2018-09-30 20:49:51,751 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:51,751 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:51,751 INFO L82 PathProgramCache]: Analyzing trace with hash 875431701, now seen corresponding path program 33 times [2018-09-30 20:49:51,751 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:51,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:51,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:51,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:51,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:51,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:52,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 34 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:52,086 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:52,086 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:52,092 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:49:52,151 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2018-09-30 20:49:52,151 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:52,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:52,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:52,534 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:52,534 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-09-30 20:49:52,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 20:49:52,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 20:49:52,535 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:52,535 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 71 states. [2018-09-30 20:49:54,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:54,374 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2018-09-30 20:49:54,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 20:49:54,375 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 104 [2018-09-30 20:49:54,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:54,376 INFO L225 Difference]: With dead ends: 113 [2018-09-30 20:49:54,376 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 20:49:54,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-09-30 20:49:54,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 20:49:54,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 20:49:54,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 20:49:54,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2018-09-30 20:49:54,380 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 104 [2018-09-30 20:49:54,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:54,380 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2018-09-30 20:49:54,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 20:49:54,380 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2018-09-30 20:49:54,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 20:49:54,381 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:54,381 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 1, 1, 1] [2018-09-30 20:49:54,381 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:54,381 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:54,382 INFO L82 PathProgramCache]: Analyzing trace with hash 945822217, now seen corresponding path program 34 times [2018-09-30 20:49:54,382 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:54,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:54,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:54,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:54,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:54,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 35 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:55,143 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:55,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:55,151 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:49:55,184 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:49:55,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:55,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:55,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 35 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:55,370 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:55,370 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 20:49:55,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 20:49:55,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 20:49:55,370 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:55,371 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 37 states. [2018-09-30 20:49:56,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:56,212 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2018-09-30 20:49:56,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 20:49:56,213 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 107 [2018-09-30 20:49:56,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:56,214 INFO L225 Difference]: With dead ends: 114 [2018-09-30 20:49:56,214 INFO L226 Difference]: Without dead ends: 110 [2018-09-30 20:49:56,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:49:56,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-30 20:49:56,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-30 20:49:56,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-30 20:49:56,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-09-30 20:49:56,219 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 107 [2018-09-30 20:49:56,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:56,219 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-09-30 20:49:56,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 20:49:56,220 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-09-30 20:49:56,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 20:49:56,220 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:56,220 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 1, 1] [2018-09-30 20:49:56,221 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:56,221 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:56,221 INFO L82 PathProgramCache]: Analyzing trace with hash 945822279, now seen corresponding path program 22 times [2018-09-30 20:49:56,221 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:56,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:56,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:56,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:56,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:59,699 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:59,699 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-30 20:49:59,714 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:59,769 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:49:59,770 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:59,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:01,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:01,185 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:01,186 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 20:50:01,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 20:50:01,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 20:50:01,186 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:01,186 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 38 states. [2018-09-30 20:50:01,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:01,501 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2018-09-30 20:50:01,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 20:50:01,502 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 107 [2018-09-30 20:50:01,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:01,503 INFO L225 Difference]: With dead ends: 116 [2018-09-30 20:50:01,503 INFO L226 Difference]: Without dead ends: 112 [2018-09-30 20:50:01,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s Time [2018-09-30 20:50:01,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-30 20:50:01,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-30 20:50:01,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-30 20:50:01,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-09-30 20:50:01,507 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 107 [2018-09-30 20:50:01,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:01,507 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-09-30 20:50:01,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 20:50:01,507 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-09-30 20:50:01,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 20:50:01,508 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:01,508 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 1, 1, 1] [2018-09-30 20:50:01,508 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:01,508 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:01,508 INFO L82 PathProgramCache]: Analyzing trace with hash 2005643925, now seen corresponding path program 35 times [2018-09-30 20:50:01,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:01,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:01,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:01,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:01,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:02,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 36 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:02,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:02,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:02,587 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:50:02,649 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-30 20:50:02,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:02,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 36 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:02,893 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:02,893 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 20:50:02,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 20:50:02,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 20:50:02,894 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:02,894 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 38 states. [2018-09-30 20:50:03,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:03,148 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2018-09-30 20:50:03,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 20:50:03,148 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 110 [2018-09-30 20:50:03,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:03,149 INFO L225 Difference]: With dead ends: 117 [2018-09-30 20:50:03,150 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 20:50:03,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:50:03,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 20:50:03,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-30 20:50:03,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-30 20:50:03,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2018-09-30 20:50:03,154 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 110 [2018-09-30 20:50:03,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:03,154 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2018-09-30 20:50:03,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 20:50:03,154 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2018-09-30 20:50:03,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 20:50:03,155 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:03,155 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 1, 1] [2018-09-30 20:50:03,155 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:03,155 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:03,155 INFO L82 PathProgramCache]: Analyzing trace with hash 2005643987, now seen corresponding path program 23 times [2018-09-30 20:50:03,155 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:03,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:03,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:03,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:03,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:03,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:05,291 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:05,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:05,300 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:50:05,361 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-30 20:50:05,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:05,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:05,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:05,564 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:05,564 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 20:50:05,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 20:50:05,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 20:50:05,565 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:05,565 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 39 states. [2018-09-30 20:50:05,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:05,722 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2018-09-30 20:50:05,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 20:50:05,722 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 110 [2018-09-30 20:50:05,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:05,723 INFO L225 Difference]: With dead ends: 119 [2018-09-30 20:50:05,723 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 20:50:05,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time [2018-09-30 20:50:05,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 20:50:05,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 20:50:05,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 20:50:05,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-09-30 20:50:05,728 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 110 [2018-09-30 20:50:05,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:05,728 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-09-30 20:50:05,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 20:50:05,728 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-09-30 20:50:05,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-30 20:50:05,729 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:05,729 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 1, 1, 1] [2018-09-30 20:50:05,729 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:05,729 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:05,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1445413239, now seen corresponding path program 36 times [2018-09-30 20:50:05,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:05,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:05,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:05,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:05,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:05,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 37 proven. 1998 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:05,973 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:05,973 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:05,981 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:50:06,045 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-09-30 20:50:06,046 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:06,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:06,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 2035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:06,993 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:06,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-09-30 20:50:06,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 20:50:06,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 20:50:06,994 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:06,994 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 77 states. [2018-09-30 20:50:09,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:09,265 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2018-09-30 20:50:09,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 20:50:09,266 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 113 [2018-09-30 20:50:09,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:09,266 INFO L225 Difference]: With dead ends: 122 [2018-09-30 20:50:09,266 INFO L226 Difference]: Without dead ends: 118 [2018-09-30 20:50:09,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time [2018-09-30 20:50:09,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-30 20:50:09,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-30 20:50:09,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-30 20:50:09,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2018-09-30 20:50:09,271 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 113 [2018-09-30 20:50:09,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:09,271 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2018-09-30 20:50:09,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 20:50:09,271 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2018-09-30 20:50:09,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 20:50:09,272 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:09,272 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 1, 1, 1] [2018-09-30 20:50:09,272 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:09,273 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:09,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1037745685, now seen corresponding path program 37 times [2018-09-30 20:50:09,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:09,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:09,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:09,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:09,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:09,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:10,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 38 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:10,492 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:10,492 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:10,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:50:10,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:10,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 38 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:12,208 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:12,208 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 20:50:12,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 20:50:12,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 20:50:12,209 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:12,209 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 40 states. [2018-09-30 20:50:12,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:12,543 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2018-09-30 20:50:12,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 20:50:12,543 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 116 [2018-09-30 20:50:12,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:12,545 INFO L225 Difference]: With dead ends: 123 [2018-09-30 20:50:12,545 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 20:50:12,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time [2018-09-30 20:50:12,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 20:50:12,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-30 20:50:12,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 20:50:12,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-09-30 20:50:12,549 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 116 [2018-09-30 20:50:12,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:12,550 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-09-30 20:50:12,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 20:50:12,550 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-09-30 20:50:12,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 20:50:12,550 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:12,550 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 1, 1] [2018-09-30 20:50:12,551 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:12,551 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:12,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1037745747, now seen corresponding path program 24 times [2018-09-30 20:50:12,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:12,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:12,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:12,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:50:12,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:12,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:12,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:12,777 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:12,777 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:12,785 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:50:12,850 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2018-09-30 20:50:12,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:12,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:13,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:13,064 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:13,064 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 20:50:13,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 20:50:13,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 20:50:13,065 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:13,065 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 41 states. [2018-09-30 20:50:13,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:13,295 INFO L93 Difference]: Finished difference Result 125 states and 131 transitions. [2018-09-30 20:50:13,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 20:50:13,296 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 116 [2018-09-30 20:50:13,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:13,297 INFO L225 Difference]: With dead ends: 125 [2018-09-30 20:50:13,297 INFO L226 Difference]: Without dead ends: 121 [2018-09-30 20:50:13,297 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:50:13,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-30 20:50:13,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-30 20:50:13,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 20:50:13,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-09-30 20:50:13,301 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 116 [2018-09-30 20:50:13,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:13,301 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-09-30 20:50:13,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 20:50:13,302 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-09-30 20:50:13,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-30 20:50:13,302 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:13,302 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 1, 1, 1] [2018-09-30 20:50:13,302 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:13,302 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:13,303 INFO L82 PathProgramCache]: Analyzing trace with hash 308544265, now seen corresponding path program 38 times [2018-09-30 20:50:13,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:13,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:13,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:13,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:13,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:13,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 39 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:13,540 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:13,540 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:13,560 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:50:13,615 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:50:13,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:13,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:13,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 39 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:13,862 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:13,863 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 20:50:13,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 20:50:13,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 20:50:13,863 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:13,863 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 41 states. [2018-09-30 20:50:14,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:14,426 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2018-09-30 20:50:14,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 20:50:14,427 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 119 [2018-09-30 20:50:14,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:14,428 INFO L225 Difference]: With dead ends: 126 [2018-09-30 20:50:14,428 INFO L226 Difference]: Without dead ends: 122 [2018-09-30 20:50:14,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:50:14,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-30 20:50:14,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-30 20:50:14,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-30 20:50:14,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2018-09-30 20:50:14,433 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 119 [2018-09-30 20:50:14,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:14,433 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2018-09-30 20:50:14,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 20:50:14,433 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2018-09-30 20:50:14,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-30 20:50:14,434 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:14,434 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 1, 1] [2018-09-30 20:50:14,434 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:14,434 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:14,434 INFO L82 PathProgramCache]: Analyzing trace with hash 308544327, now seen corresponding path program 25 times [2018-09-30 20:50:14,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:14,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:14,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:14,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:14,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:14,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:14,650 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:14,650 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:14,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:50:14,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:14,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:14,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:14,922 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:14,922 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 20:50:14,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 20:50:14,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 20:50:14,923 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:14,923 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 42 states. [2018-09-30 20:50:15,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:15,263 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2018-09-30 20:50:15,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 20:50:15,263 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 119 [2018-09-30 20:50:15,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:15,264 INFO L225 Difference]: With dead ends: 128 [2018-09-30 20:50:15,264 INFO L226 Difference]: Without dead ends: 124 [2018-09-30 20:50:15,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:50:15,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-30 20:50:15,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-30 20:50:15,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-30 20:50:15,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2018-09-30 20:50:15,269 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 119 [2018-09-30 20:50:15,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:15,269 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2018-09-30 20:50:15,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 20:50:15,269 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2018-09-30 20:50:15,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 20:50:15,269 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:15,270 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 1, 1, 1] [2018-09-30 20:50:15,270 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:15,270 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:15,270 INFO L82 PathProgramCache]: Analyzing trace with hash 613624213, now seen corresponding path program 39 times [2018-09-30 20:50:15,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:15,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:15,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:15,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:50:15,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:15,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 40 proven. 2340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:15,529 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:15,529 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:15,536 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:50:15,607 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2018-09-30 20:50:15,608 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:15,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:16,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:16,240 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:16,240 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-09-30 20:50:16,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 20:50:16,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 20:50:16,241 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:16,241 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 83 states. [2018-09-30 20:50:18,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:18,319 INFO L93 Difference]: Finished difference Result 131 states and 138 transitions. [2018-09-30 20:50:18,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 20:50:18,320 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 122 [2018-09-30 20:50:18,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:18,321 INFO L225 Difference]: With dead ends: 131 [2018-09-30 20:50:18,321 INFO L226 Difference]: Without dead ends: 127 [2018-09-30 20:50:18,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time [2018-09-30 20:50:18,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-30 20:50:18,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-30 20:50:18,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-30 20:50:18,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2018-09-30 20:50:18,324 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 122 [2018-09-30 20:50:18,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:18,325 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2018-09-30 20:50:18,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 20:50:18,325 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2018-09-30 20:50:18,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-30 20:50:18,325 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:18,326 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 1, 1, 1] [2018-09-30 20:50:18,326 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:18,326 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:18,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1099556745, now seen corresponding path program 40 times [2018-09-30 20:50:18,326 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:18,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:18,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:18,327 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:18,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 41 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:18,559 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:18,559 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:18,566 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:50:18,604 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:50:18,604 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:18,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 41 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:18,845 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:18,846 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 20:50:18,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 20:50:18,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 20:50:18,846 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:18,846 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 43 states. [2018-09-30 20:50:19,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:19,364 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2018-09-30 20:50:19,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 20:50:19,364 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 125 [2018-09-30 20:50:19,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:19,365 INFO L225 Difference]: With dead ends: 132 [2018-09-30 20:50:19,365 INFO L226 Difference]: Without dead ends: 128 [2018-09-30 20:50:19,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:50:19,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-30 20:50:19,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-30 20:50:19,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-30 20:50:19,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2018-09-30 20:50:19,370 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 125 [2018-09-30 20:50:19,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:19,370 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2018-09-30 20:50:19,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 20:50:19,370 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2018-09-30 20:50:19,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-30 20:50:19,371 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:19,371 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 1, 1] [2018-09-30 20:50:19,371 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:19,372 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:19,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1099556807, now seen corresponding path program 26 times [2018-09-30 20:50:19,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:19,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:19,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:19,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:19,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:19,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:19,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:19,573 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:19,573 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:19,581 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:50:19,618 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:50:19,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:19,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:20,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:20,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:20,073 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 20:50:20,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 20:50:20,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 20:50:20,073 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:20,073 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 44 states. [2018-09-30 20:50:20,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:20,240 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2018-09-30 20:50:20,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 20:50:20,241 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 125 [2018-09-30 20:50:20,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:20,242 INFO L225 Difference]: With dead ends: 134 [2018-09-30 20:50:20,242 INFO L226 Difference]: Without dead ends: 130 [2018-09-30 20:50:20,242 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:50:20,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-30 20:50:20,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-30 20:50:20,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-30 20:50:20,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2018-09-30 20:50:20,246 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 125 [2018-09-30 20:50:20,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:20,246 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2018-09-30 20:50:20,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 20:50:20,246 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2018-09-30 20:50:20,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 20:50:20,247 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:20,247 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 1, 1, 1] [2018-09-30 20:50:20,247 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:20,247 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:20,247 INFO L82 PathProgramCache]: Analyzing trace with hash -819137259, now seen corresponding path program 41 times [2018-09-30 20:50:20,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:20,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:20,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:20,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:20,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:20,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 42 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:20,474 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:20,474 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:20,481 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:50:20,557 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-30 20:50:20,557 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:20,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 42 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:21,773 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:21,773 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 20:50:21,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 20:50:21,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 20:50:21,773 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:21,774 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 44 states. [2018-09-30 20:50:22,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:22,220 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2018-09-30 20:50:22,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 20:50:22,221 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 128 [2018-09-30 20:50:22,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:22,222 INFO L225 Difference]: With dead ends: 135 [2018-09-30 20:50:22,222 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 20:50:22,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-09-30 20:50:22,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 20:50:22,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-30 20:50:22,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 20:50:22,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2018-09-30 20:50:22,225 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 128 [2018-09-30 20:50:22,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:22,226 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2018-09-30 20:50:22,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 20:50:22,226 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2018-09-30 20:50:22,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 20:50:22,226 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:22,226 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 1, 1] [2018-09-30 20:50:22,227 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:22,227 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:22,227 INFO L82 PathProgramCache]: Analyzing trace with hash -819137197, now seen corresponding path program 27 times [2018-09-30 20:50:22,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:22,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:22,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:22,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:22,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:22,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:22,475 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:22,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:22,482 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:50:22,559 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 43 check-sat command(s) [2018-09-30 20:50:22,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:22,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:22,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:22,874 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:22,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 20:50:22,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 20:50:22,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 20:50:22,875 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:22,875 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 45 states. [2018-09-30 20:50:23,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:23,239 INFO L93 Difference]: Finished difference Result 137 states and 143 transitions. [2018-09-30 20:50:23,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 20:50:23,240 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 128 [2018-09-30 20:50:23,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:23,241 INFO L225 Difference]: With dead ends: 137 [2018-09-30 20:50:23,241 INFO L226 Difference]: Without dead ends: 133 [2018-09-30 20:50:23,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:50:23,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-30 20:50:23,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-30 20:50:23,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 20:50:23,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-09-30 20:50:23,245 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 128 [2018-09-30 20:50:23,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:23,245 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-09-30 20:50:23,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 20:50:23,245 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-09-30 20:50:23,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-30 20:50:23,246 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:23,246 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 1, 1, 1] [2018-09-30 20:50:23,246 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:23,246 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:23,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1087532041, now seen corresponding path program 42 times [2018-09-30 20:50:23,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:23,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:23,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:23,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:23,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:23,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 43 proven. 2709 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:23,498 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:23,498 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:23,504 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:50:23,580 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-09-30 20:50:23,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:23,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:24,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 0 proven. 2752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:24,507 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:24,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-09-30 20:50:24,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 20:50:24,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 20:50:24,509 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:24,509 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 89 states. [2018-09-30 20:50:26,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:26,576 INFO L93 Difference]: Finished difference Result 140 states and 147 transitions. [2018-09-30 20:50:26,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 20:50:26,576 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 131 [2018-09-30 20:50:26,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:26,577 INFO L225 Difference]: With dead ends: 140 [2018-09-30 20:50:26,577 INFO L226 Difference]: Without dead ends: 136 [2018-09-30 20:50:26,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time [2018-09-30 20:50:26,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-30 20:50:26,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-30 20:50:26,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-30 20:50:26,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-09-30 20:50:26,580 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 131 [2018-09-30 20:50:26,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:26,580 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-09-30 20:50:26,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 20:50:26,580 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-09-30 20:50:26,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-30 20:50:26,581 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:26,581 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 1, 1, 1] [2018-09-30 20:50:26,581 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:26,582 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:26,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1730158741, now seen corresponding path program 43 times [2018-09-30 20:50:26,582 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:26,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:26,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:26,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:26,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:26,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 44 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:26,875 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:26,875 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:26,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:50:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:26,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:27,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 44 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:27,151 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:27,151 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 20:50:27,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 20:50:27,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 20:50:27,152 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:27,152 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 46 states. [2018-09-30 20:50:27,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:27,515 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2018-09-30 20:50:27,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 20:50:27,515 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 134 [2018-09-30 20:50:27,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:27,516 INFO L225 Difference]: With dead ends: 141 [2018-09-30 20:50:27,516 INFO L226 Difference]: Without dead ends: 137 [2018-09-30 20:50:27,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:50:27,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-30 20:50:27,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-30 20:50:27,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-30 20:50:27,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2018-09-30 20:50:27,519 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 134 [2018-09-30 20:50:27,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:27,520 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2018-09-30 20:50:27,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 20:50:27,520 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2018-09-30 20:50:27,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-30 20:50:27,520 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:27,520 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 1, 1] [2018-09-30 20:50:27,521 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:27,521 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:27,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1730158803, now seen corresponding path program 28 times [2018-09-30 20:50:27,521 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:27,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:27,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:27,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:50:27,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:27,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:27,776 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:27,776 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:27,783 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:50:27,824 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:50:27,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:27,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:28,056 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:28,057 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 20:50:28,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 20:50:28,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 20:50:28,057 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:28,057 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand 47 states. [2018-09-30 20:50:28,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:28,258 INFO L93 Difference]: Finished difference Result 143 states and 149 transitions. [2018-09-30 20:50:28,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 20:50:28,258 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 134 [2018-09-30 20:50:28,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:28,259 INFO L225 Difference]: With dead ends: 143 [2018-09-30 20:50:28,260 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 20:50:28,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:50:28,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 20:50:28,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-30 20:50:28,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-30 20:50:28,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2018-09-30 20:50:28,265 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 134 [2018-09-30 20:50:28,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:28,265 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2018-09-30 20:50:28,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 20:50:28,265 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2018-09-30 20:50:28,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-30 20:50:28,265 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:28,265 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 1, 1, 1] [2018-09-30 20:50:28,266 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:28,266 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:28,266 INFO L82 PathProgramCache]: Analyzing trace with hash -742027127, now seen corresponding path program 44 times [2018-09-30 20:50:28,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:28,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:28,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:28,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:28,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:28,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 45 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:28,502 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:28,502 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:28,510 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:50:28,549 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:50:28,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:28,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:28,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 45 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:28,810 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:28,810 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 20:50:28,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 20:50:28,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 20:50:28,811 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:28,811 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand 47 states. [2018-09-30 20:50:29,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:29,204 INFO L93 Difference]: Finished difference Result 144 states and 149 transitions. [2018-09-30 20:50:29,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 20:50:29,204 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 137 [2018-09-30 20:50:29,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:29,205 INFO L225 Difference]: With dead ends: 144 [2018-09-30 20:50:29,206 INFO L226 Difference]: Without dead ends: 140 [2018-09-30 20:50:29,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:50:29,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-30 20:50:29,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-30 20:50:29,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-30 20:50:29,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2018-09-30 20:50:29,211 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 137 [2018-09-30 20:50:29,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:29,211 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2018-09-30 20:50:29,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 20:50:29,211 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2018-09-30 20:50:29,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-30 20:50:29,212 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:29,212 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 1, 1] [2018-09-30 20:50:29,212 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:29,213 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:29,213 INFO L82 PathProgramCache]: Analyzing trace with hash -742027065, now seen corresponding path program 29 times [2018-09-30 20:50:29,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:29,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:29,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:29,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:29,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:29,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 3015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:29,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:29,467 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:29,474 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:50:29,554 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-30 20:50:29,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:29,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:29,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 3015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:29,798 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:29,799 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 20:50:29,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 20:50:29,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 20:50:29,799 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:29,799 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 48 states. [2018-09-30 20:50:30,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:30,146 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2018-09-30 20:50:30,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 20:50:30,146 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 137 [2018-09-30 20:50:30,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:30,147 INFO L225 Difference]: With dead ends: 146 [2018-09-30 20:50:30,148 INFO L226 Difference]: Without dead ends: 142 [2018-09-30 20:50:30,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:50:30,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-30 20:50:30,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-30 20:50:30,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-30 20:50:30,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2018-09-30 20:50:30,152 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 137 [2018-09-30 20:50:30,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:30,153 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2018-09-30 20:50:30,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 20:50:30,153 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2018-09-30 20:50:30,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-30 20:50:30,154 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:30,154 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 1, 1, 1] [2018-09-30 20:50:30,154 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:30,154 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:30,154 INFO L82 PathProgramCache]: Analyzing trace with hash 467971093, now seen corresponding path program 45 times [2018-09-30 20:50:30,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:30,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:30,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:30,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:30,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:30,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:30,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 46 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:30,401 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:30,401 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:30,408 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:50:30,841 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2018-09-30 20:50:30,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:30,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 46 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:31,073 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:31,073 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 20:50:31,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 20:50:31,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 20:50:31,074 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:31,074 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 48 states. [2018-09-30 20:50:31,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:31,811 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2018-09-30 20:50:31,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 20:50:31,811 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 140 [2018-09-30 20:50:31,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:31,812 INFO L225 Difference]: With dead ends: 147 [2018-09-30 20:50:31,813 INFO L226 Difference]: Without dead ends: 143 [2018-09-30 20:50:31,813 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:50:31,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-30 20:50:31,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-30 20:50:31,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-30 20:50:31,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2018-09-30 20:50:31,816 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 140 [2018-09-30 20:50:31,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:31,816 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2018-09-30 20:50:31,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 20:50:31,816 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2018-09-30 20:50:31,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-30 20:50:31,817 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:31,817 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1] [2018-09-30 20:50:31,817 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:31,818 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:31,818 INFO L82 PathProgramCache]: Analyzing trace with hash 467971155, now seen corresponding path program 30 times [2018-09-30 20:50:31,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:31,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:31,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:31,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:31,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:32,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:32,221 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:32,221 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:32,227 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:50:32,307 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2018-09-30 20:50:32,308 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:32,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:32,583 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:32,584 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 20:50:32,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 20:50:32,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 20:50:32,584 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:32,584 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 49 states. [2018-09-30 20:50:32,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:32,978 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2018-09-30 20:50:32,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 20:50:32,978 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 140 [2018-09-30 20:50:32,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:32,979 INFO L225 Difference]: With dead ends: 149 [2018-09-30 20:50:32,980 INFO L226 Difference]: Without dead ends: 145 [2018-09-30 20:50:32,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:50:32,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-30 20:50:32,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-30 20:50:32,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-30 20:50:32,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2018-09-30 20:50:32,983 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 140 [2018-09-30 20:50:32,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:32,983 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2018-09-30 20:50:32,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 20:50:32,984 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2018-09-30 20:50:32,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-30 20:50:32,984 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:32,984 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 1, 1, 1] [2018-09-30 20:50:32,985 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:32,985 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:32,985 INFO L82 PathProgramCache]: Analyzing trace with hash -135572215, now seen corresponding path program 46 times [2018-09-30 20:50:32,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:32,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:32,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:32,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:32,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 47 proven. 3243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:33,380 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:33,380 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:33,387 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:50:33,429 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:50:33,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:33,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:34,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 0 proven. 3290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:34,106 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:34,106 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-09-30 20:50:34,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-30 20:50:34,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-30 20:50:34,107 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:34,107 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 97 states. [2018-09-30 20:50:36,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:36,762 INFO L93 Difference]: Finished difference Result 152 states and 159 transitions. [2018-09-30 20:50:36,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 20:50:36,762 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 143 [2018-09-30 20:50:36,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:36,763 INFO L225 Difference]: With dead ends: 152 [2018-09-30 20:50:36,764 INFO L226 Difference]: Without dead ends: 148 [2018-09-30 20:50:36,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time [2018-09-30 20:50:36,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-30 20:50:36,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-09-30 20:50:36,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-30 20:50:36,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2018-09-30 20:50:36,768 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 143 [2018-09-30 20:50:36,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:36,768 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2018-09-30 20:50:36,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-30 20:50:36,768 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2018-09-30 20:50:36,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 20:50:36,769 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:36,769 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 1, 1, 1] [2018-09-30 20:50:36,769 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:36,770 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:36,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1561159787, now seen corresponding path program 47 times [2018-09-30 20:50:36,770 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:36,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:36,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:36,771 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:36,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:36,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:37,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 48 proven. 3384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:37,103 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:37,103 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:37,110 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:50:37,191 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-30 20:50:37,191 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:37,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:37,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 48 proven. 3384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:37,484 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:37,484 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 20:50:37,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 20:50:37,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 20:50:37,485 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:37,485 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand 50 states. [2018-09-30 20:50:37,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:37,913 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2018-09-30 20:50:37,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 20:50:37,913 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 146 [2018-09-30 20:50:37,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:37,914 INFO L225 Difference]: With dead ends: 153 [2018-09-30 20:50:37,914 INFO L226 Difference]: Without dead ends: 149 [2018-09-30 20:50:37,914 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:50:37,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-30 20:50:37,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-30 20:50:37,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-30 20:50:37,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2018-09-30 20:50:37,917 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 146 [2018-09-30 20:50:37,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:37,917 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2018-09-30 20:50:37,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 20:50:37,918 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2018-09-30 20:50:37,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 20:50:37,918 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:37,918 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 1, 1] [2018-09-30 20:50:37,918 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:37,919 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:37,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1561159725, now seen corresponding path program 31 times [2018-09-30 20:50:37,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:37,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:37,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:37,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:37,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:38,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:38,178 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:38,178 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:38,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:50:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:38,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:38,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:38,491 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:38,491 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 20:50:38,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 20:50:38,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 20:50:38,492 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:38,492 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 51 states. [2018-09-30 20:50:38,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:38,895 INFO L93 Difference]: Finished difference Result 155 states and 161 transitions. [2018-09-30 20:50:38,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 20:50:38,896 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 146 [2018-09-30 20:50:38,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:38,897 INFO L225 Difference]: With dead ends: 155 [2018-09-30 20:50:38,897 INFO L226 Difference]: Without dead ends: 151 [2018-09-30 20:50:38,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:50:38,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-30 20:50:38,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-30 20:50:38,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-30 20:50:38,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2018-09-30 20:50:38,903 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 146 [2018-09-30 20:50:38,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:38,903 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2018-09-30 20:50:38,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 20:50:38,903 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2018-09-30 20:50:38,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-30 20:50:38,904 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:38,904 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 1, 1, 1] [2018-09-30 20:50:38,904 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:38,904 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:38,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1691072905, now seen corresponding path program 48 times [2018-09-30 20:50:38,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:38,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:38,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:38,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:50:38,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:38,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:39,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 49 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:39,170 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:39,170 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:39,176 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:50:39,265 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-09-30 20:50:39,266 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:39,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:40,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 0 proven. 3577 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:40,039 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:40,039 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-09-30 20:50:40,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 20:50:40,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 20:50:40,041 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:40,041 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 101 states. [2018-09-30 20:50:42,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:42,766 INFO L93 Difference]: Finished difference Result 158 states and 165 transitions. [2018-09-30 20:50:42,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 20:50:42,766 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 149 [2018-09-30 20:50:42,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:42,767 INFO L225 Difference]: With dead ends: 158 [2018-09-30 20:50:42,767 INFO L226 Difference]: Without dead ends: 154 [2018-09-30 20:50:42,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time [2018-09-30 20:50:42,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-30 20:50:42,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-09-30 20:50:42,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-30 20:50:42,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2018-09-30 20:50:42,771 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 149 [2018-09-30 20:50:42,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:42,771 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2018-09-30 20:50:42,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 20:50:42,772 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2018-09-30 20:50:42,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-30 20:50:42,772 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:42,773 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 1, 1, 1] [2018-09-30 20:50:42,773 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:42,773 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:42,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1212030187, now seen corresponding path program 49 times [2018-09-30 20:50:42,773 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:42,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:42,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:42,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:42,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:42,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:43,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 50 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:43,046 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:43,046 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:43,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:50:43,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:43,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 50 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:43,359 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:43,360 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 20:50:43,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 20:50:43,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 20:50:43,360 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:43,361 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 52 states. [2018-09-30 20:50:43,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:43,805 INFO L93 Difference]: Finished difference Result 159 states and 164 transitions. [2018-09-30 20:50:43,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 20:50:43,806 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 152 [2018-09-30 20:50:43,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:43,807 INFO L225 Difference]: With dead ends: 159 [2018-09-30 20:50:43,807 INFO L226 Difference]: Without dead ends: 155 [2018-09-30 20:50:43,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:50:43,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-30 20:50:43,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-30 20:50:43,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-30 20:50:43,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2018-09-30 20:50:43,811 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 152 [2018-09-30 20:50:43,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:43,811 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2018-09-30 20:50:43,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 20:50:43,811 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2018-09-30 20:50:43,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-30 20:50:43,812 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:43,812 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 1, 1] [2018-09-30 20:50:43,812 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:43,812 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:43,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1212030125, now seen corresponding path program 32 times [2018-09-30 20:50:43,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:43,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:43,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:43,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:50:43,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:43,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:44,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:44,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:44,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:44,337 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:50:44,381 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:50:44,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:44,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:44,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:44,663 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:44,663 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 20:50:44,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 20:50:44,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 20:50:44,664 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:44,664 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 53 states. [2018-09-30 20:50:45,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:45,334 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2018-09-30 20:50:45,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 20:50:45,334 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 152 [2018-09-30 20:50:45,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:45,335 INFO L225 Difference]: With dead ends: 161 [2018-09-30 20:50:45,336 INFO L226 Difference]: Without dead ends: 157 [2018-09-30 20:50:45,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:50:45,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-30 20:50:45,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-30 20:50:45,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-30 20:50:45,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2018-09-30 20:50:45,340 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 152 [2018-09-30 20:50:45,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:45,341 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2018-09-30 20:50:45,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 20:50:45,341 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2018-09-30 20:50:45,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-30 20:50:45,342 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:45,342 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 1, 1, 1] [2018-09-30 20:50:45,342 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:45,342 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:45,343 INFO L82 PathProgramCache]: Analyzing trace with hash 200195593, now seen corresponding path program 50 times [2018-09-30 20:50:45,343 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:45,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:45,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:45,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:45,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:45,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 51 proven. 3825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:45,657 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:45,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:45,666 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:50:45,710 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:50:45,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:45,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:45,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 51 proven. 3825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:45,979 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:45,979 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 20:50:45,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 20:50:45,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 20:50:45,980 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:45,980 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 53 states. [2018-09-30 20:50:46,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:46,327 INFO L93 Difference]: Finished difference Result 162 states and 167 transitions. [2018-09-30 20:50:46,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 20:50:46,328 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 155 [2018-09-30 20:50:46,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:46,329 INFO L225 Difference]: With dead ends: 162 [2018-09-30 20:50:46,329 INFO L226 Difference]: Without dead ends: 158 [2018-09-30 20:50:46,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:50:46,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-30 20:50:46,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-09-30 20:50:46,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-30 20:50:46,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2018-09-30 20:50:46,334 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 155 [2018-09-30 20:50:46,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:46,335 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2018-09-30 20:50:46,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 20:50:46,335 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2018-09-30 20:50:46,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-30 20:50:46,336 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:46,336 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 1, 1] [2018-09-30 20:50:46,336 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:46,336 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:46,336 INFO L82 PathProgramCache]: Analyzing trace with hash 200195655, now seen corresponding path program 33 times [2018-09-30 20:50:46,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:46,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:46,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:46,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:46,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:46,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:46,669 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:46,669 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:46,677 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:50:46,808 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-30 20:50:46,808 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:46,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:47,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:47,258 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:47,259 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 20:50:47,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 20:50:47,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 20:50:47,260 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:47,260 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand 54 states. [2018-09-30 20:50:47,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:47,577 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2018-09-30 20:50:47,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 20:50:47,577 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 155 [2018-09-30 20:50:47,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:47,579 INFO L225 Difference]: With dead ends: 164 [2018-09-30 20:50:47,579 INFO L226 Difference]: Without dead ends: 160 [2018-09-30 20:50:47,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:50:47,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-30 20:50:47,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-09-30 20:50:47,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-30 20:50:47,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2018-09-30 20:50:47,583 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 155 [2018-09-30 20:50:47,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:47,584 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2018-09-30 20:50:47,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 20:50:47,584 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2018-09-30 20:50:47,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-30 20:50:47,584 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:47,585 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 1, 1, 1] [2018-09-30 20:50:47,585 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:47,585 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:47,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1681224043, now seen corresponding path program 51 times [2018-09-30 20:50:47,585 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:47,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:47,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:47,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:47,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 52 proven. 3978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:47,869 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:47,869 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:47,880 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:50:47,976 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 53 check-sat command(s) [2018-09-30 20:50:47,976 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:47,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:48,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:48,579 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:48,579 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-09-30 20:50:48,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-30 20:50:48,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-30 20:50:48,580 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:48,581 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 107 states. [2018-09-30 20:50:51,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:51,558 INFO L93 Difference]: Finished difference Result 167 states and 174 transitions. [2018-09-30 20:50:51,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 20:50:51,558 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 158 [2018-09-30 20:50:51,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:51,559 INFO L225 Difference]: With dead ends: 167 [2018-09-30 20:50:51,559 INFO L226 Difference]: Without dead ends: 163 [2018-09-30 20:50:51,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time [2018-09-30 20:50:51,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-30 20:50:51,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-30 20:50:51,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-30 20:50:51,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2018-09-30 20:50:51,562 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 158 [2018-09-30 20:50:51,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:51,563 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2018-09-30 20:50:51,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-30 20:50:51,563 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2018-09-30 20:50:51,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-30 20:50:51,564 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:51,564 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 1, 1, 1] [2018-09-30 20:50:51,564 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:51,564 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:51,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1730387319, now seen corresponding path program 52 times [2018-09-30 20:50:51,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:51,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:51,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:51,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:51,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:51,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 53 proven. 4134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:51,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:51,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:51,881 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:50:51,927 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:50:51,927 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:51,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:52,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 53 proven. 4134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:52,269 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:52,270 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 20:50:52,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 20:50:52,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 20:50:52,271 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:52,271 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand 55 states. [2018-09-30 20:50:52,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:52,759 INFO L93 Difference]: Finished difference Result 168 states and 173 transitions. [2018-09-30 20:50:52,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 20:50:52,760 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 161 [2018-09-30 20:50:52,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:52,761 INFO L225 Difference]: With dead ends: 168 [2018-09-30 20:50:52,761 INFO L226 Difference]: Without dead ends: 164 [2018-09-30 20:50:52,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:50:52,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-30 20:50:52,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-09-30 20:50:52,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-30 20:50:52,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2018-09-30 20:50:52,764 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 161 [2018-09-30 20:50:52,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:52,764 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2018-09-30 20:50:52,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 20:50:52,764 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2018-09-30 20:50:52,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-30 20:50:52,765 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:52,765 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 53, 1, 1] [2018-09-30 20:50:52,766 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:52,766 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:52,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1730387257, now seen corresponding path program 34 times [2018-09-30 20:50:52,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:52,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:52,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:52,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:52,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:53,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:53,070 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:53,070 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:53,077 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:50:53,126 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:50:53,127 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:53,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:53,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:53,425 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:53,425 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 20:50:53,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 20:50:53,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 20:50:53,426 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:53,426 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand 56 states. [2018-09-30 20:50:53,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:53,914 INFO L93 Difference]: Finished difference Result 170 states and 176 transitions. [2018-09-30 20:50:53,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 20:50:53,915 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 161 [2018-09-30 20:50:53,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:53,916 INFO L225 Difference]: With dead ends: 170 [2018-09-30 20:50:53,916 INFO L226 Difference]: Without dead ends: 166 [2018-09-30 20:50:53,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:50:53,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-09-30 20:50:53,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-09-30 20:50:53,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-09-30 20:50:53,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2018-09-30 20:50:53,921 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 161 [2018-09-30 20:50:53,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:53,921 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2018-09-30 20:50:53,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 20:50:53,921 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2018-09-30 20:50:53,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-30 20:50:53,922 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:53,922 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 53, 1, 1, 1] [2018-09-30 20:50:53,922 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:53,922 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:53,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1769694699, now seen corresponding path program 53 times [2018-09-30 20:50:53,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:53,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:53,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:53,923 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:53,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:53,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:54,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 54 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:54,214 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:54,214 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:54,221 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:50:54,321 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-30 20:50:54,321 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:54,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 54 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:54,607 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:54,607 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 20:50:54,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 20:50:54,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 20:50:54,608 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:54,608 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 56 states. [2018-09-30 20:50:55,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:55,079 INFO L93 Difference]: Finished difference Result 171 states and 176 transitions. [2018-09-30 20:50:55,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 20:50:55,080 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 164 [2018-09-30 20:50:55,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:55,080 INFO L225 Difference]: With dead ends: 171 [2018-09-30 20:50:55,080 INFO L226 Difference]: Without dead ends: 167 [2018-09-30 20:50:55,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:50:55,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-30 20:50:55,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-30 20:50:55,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-30 20:50:55,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2018-09-30 20:50:55,085 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 164 [2018-09-30 20:50:55,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:55,085 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2018-09-30 20:50:55,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 20:50:55,085 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2018-09-30 20:50:55,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-30 20:50:55,086 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:55,086 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 54, 1, 1] [2018-09-30 20:50:55,086 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:55,086 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:55,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1769694637, now seen corresponding path program 35 times [2018-09-30 20:50:55,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:55,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:55,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:55,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:55,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:55,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:55,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:55,532 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:55,532 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:55,539 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:50:55,640 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-30 20:50:55,641 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:55,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:55,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:55,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:55,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 20:50:55,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 20:50:55,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 20:50:55,926 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:55,927 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand 57 states. [2018-09-30 20:50:56,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:56,420 INFO L93 Difference]: Finished difference Result 173 states and 179 transitions. [2018-09-30 20:50:56,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 20:50:56,420 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 164 [2018-09-30 20:50:56,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:56,421 INFO L225 Difference]: With dead ends: 173 [2018-09-30 20:50:56,421 INFO L226 Difference]: Without dead ends: 169 [2018-09-30 20:50:56,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:50:56,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-30 20:50:56,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-30 20:50:56,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-30 20:50:56,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2018-09-30 20:50:56,425 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 164 [2018-09-30 20:50:56,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:56,425 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2018-09-30 20:50:56,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 20:50:56,425 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2018-09-30 20:50:56,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-09-30 20:50:56,426 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:56,426 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 54, 1, 1, 1] [2018-09-30 20:50:56,426 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:56,426 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:56,426 INFO L82 PathProgramCache]: Analyzing trace with hash -249780471, now seen corresponding path program 54 times [2018-09-30 20:50:56,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:56,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:56,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:56,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:56,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:56,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:56,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 55 proven. 4455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:56,747 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:56,748 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:56,754 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:50:56,867 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2018-09-30 20:50:56,867 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:56,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 0 proven. 4510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:57,500 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:57,500 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-09-30 20:50:57,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-30 20:50:57,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-30 20:50:57,502 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:57,502 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand 113 states. [2018-09-30 20:51:00,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:00,717 INFO L93 Difference]: Finished difference Result 176 states and 183 transitions. [2018-09-30 20:51:00,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-30 20:51:00,717 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 167 [2018-09-30 20:51:00,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:00,718 INFO L225 Difference]: With dead ends: 176 [2018-09-30 20:51:00,718 INFO L226 Difference]: Without dead ends: 172 [2018-09-30 20:51:00,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time [2018-09-30 20:51:00,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-09-30 20:51:00,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2018-09-30 20:51:00,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-09-30 20:51:00,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2018-09-30 20:51:00,723 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 167 [2018-09-30 20:51:00,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:00,723 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2018-09-30 20:51:00,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-30 20:51:00,723 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2018-09-30 20:51:00,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-30 20:51:00,724 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:00,724 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 55, 1, 1, 1] [2018-09-30 20:51:00,724 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:00,724 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:00,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1969751445, now seen corresponding path program 55 times [2018-09-30 20:51:00,725 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:00,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:00,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:00,726 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:00,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:01,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 56 proven. 4620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:01,070 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:01,070 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:01,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:51:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:01,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:01,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 56 proven. 4620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:01,719 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:01,719 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 20:51:01,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 20:51:01,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 20:51:01,720 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:01,720 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand 58 states. [2018-09-30 20:51:02,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:02,059 INFO L93 Difference]: Finished difference Result 177 states and 182 transitions. [2018-09-30 20:51:02,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 20:51:02,059 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 170 [2018-09-30 20:51:02,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:02,060 INFO L225 Difference]: With dead ends: 177 [2018-09-30 20:51:02,060 INFO L226 Difference]: Without dead ends: 173 [2018-09-30 20:51:02,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:51:02,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-30 20:51:02,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-30 20:51:02,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-30 20:51:02,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2018-09-30 20:51:02,064 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 170 [2018-09-30 20:51:02,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:02,065 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2018-09-30 20:51:02,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 20:51:02,065 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2018-09-30 20:51:02,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-30 20:51:02,065 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:02,065 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 56, 1, 1] [2018-09-30 20:51:02,066 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:02,066 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:02,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1969751507, now seen corresponding path program 36 times [2018-09-30 20:51:02,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:02,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:02,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:02,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:51:02,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:02,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:02,431 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:02,431 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:02,438 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:51:02,540 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 57 check-sat command(s) [2018-09-30 20:51:02,541 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:02,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:02,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:02,837 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:02,838 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 20:51:02,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 20:51:02,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 20:51:02,838 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:02,839 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand 59 states. [2018-09-30 20:51:03,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:03,086 INFO L93 Difference]: Finished difference Result 179 states and 185 transitions. [2018-09-30 20:51:03,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 20:51:03,086 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 170 [2018-09-30 20:51:03,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:03,088 INFO L225 Difference]: With dead ends: 179 [2018-09-30 20:51:03,088 INFO L226 Difference]: Without dead ends: 175 [2018-09-30 20:51:03,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:51:03,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-30 20:51:03,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-30 20:51:03,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-30 20:51:03,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-09-30 20:51:03,093 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 170 [2018-09-30 20:51:03,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:03,093 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-09-30 20:51:03,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 20:51:03,093 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-09-30 20:51:03,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-09-30 20:51:03,094 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:03,094 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 56, 1, 1, 1] [2018-09-30 20:51:03,094 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:03,094 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:03,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1271428215, now seen corresponding path program 56 times [2018-09-30 20:51:03,094 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:03,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:03,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:03,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:03,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:03,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 57 proven. 4788 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:03,410 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:03,410 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:03,417 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:51:03,468 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:51:03,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:03,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:03,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 57 proven. 4788 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:03,775 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:03,775 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 20:51:03,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 20:51:03,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 20:51:03,776 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:03,776 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 59 states. [2018-09-30 20:51:04,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:04,311 INFO L93 Difference]: Finished difference Result 180 states and 185 transitions. [2018-09-30 20:51:04,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 20:51:04,311 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 173 [2018-09-30 20:51:04,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:04,312 INFO L225 Difference]: With dead ends: 180 [2018-09-30 20:51:04,312 INFO L226 Difference]: Without dead ends: 176 [2018-09-30 20:51:04,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:51:04,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-09-30 20:51:04,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-09-30 20:51:04,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-09-30 20:51:04,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2018-09-30 20:51:04,317 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 173 [2018-09-30 20:51:04,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:04,317 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2018-09-30 20:51:04,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 20:51:04,317 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2018-09-30 20:51:04,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-09-30 20:51:04,318 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:04,318 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 57, 1, 1] [2018-09-30 20:51:04,318 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:04,319 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:04,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1271428153, now seen corresponding path program 37 times [2018-09-30 20:51:04,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:04,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:04,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:04,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:04,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:04,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 4845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:04,647 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:04,648 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:04,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:51:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:04,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 4845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:05,037 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:05,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 20:51:05,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 20:51:05,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 20:51:05,038 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:05,039 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand 60 states. [2018-09-30 20:51:05,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:05,765 INFO L93 Difference]: Finished difference Result 182 states and 188 transitions. [2018-09-30 20:51:05,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 20:51:05,765 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 173 [2018-09-30 20:51:05,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:05,766 INFO L225 Difference]: With dead ends: 182 [2018-09-30 20:51:05,766 INFO L226 Difference]: Without dead ends: 178 [2018-09-30 20:51:05,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:51:05,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-09-30 20:51:05,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-09-30 20:51:05,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-09-30 20:51:05,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2018-09-30 20:51:05,771 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 173 [2018-09-30 20:51:05,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:05,771 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2018-09-30 20:51:05,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 20:51:05,771 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2018-09-30 20:51:05,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-30 20:51:05,772 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:05,772 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 57, 1, 1, 1] [2018-09-30 20:51:05,773 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:05,773 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:05,773 INFO L82 PathProgramCache]: Analyzing trace with hash 200069397, now seen corresponding path program 57 times [2018-09-30 20:51:05,773 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:05,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:05,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:05,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:51:05,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:05,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 58 proven. 4959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:06,098 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:06,098 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:06,106 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:51:06,217 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 59 check-sat command(s) [2018-09-30 20:51:06,217 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:06,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:06,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 5017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:06,915 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:06,915 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-09-30 20:51:06,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-30 20:51:06,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-30 20:51:06,916 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:06,916 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand 119 states. [2018-09-30 20:51:10,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:10,233 INFO L93 Difference]: Finished difference Result 185 states and 192 transitions. [2018-09-30 20:51:10,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-30 20:51:10,233 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 176 [2018-09-30 20:51:10,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:10,234 INFO L225 Difference]: With dead ends: 185 [2018-09-30 20:51:10,234 INFO L226 Difference]: Without dead ends: 181 [2018-09-30 20:51:10,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time [2018-09-30 20:51:10,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-30 20:51:10,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-30 20:51:10,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-30 20:51:10,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2018-09-30 20:51:10,238 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 176 [2018-09-30 20:51:10,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:10,238 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2018-09-30 20:51:10,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-30 20:51:10,238 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2018-09-30 20:51:10,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-09-30 20:51:10,239 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:10,239 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 58, 1, 1, 1] [2018-09-30 20:51:10,239 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:10,239 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:10,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1145761783, now seen corresponding path program 58 times [2018-09-30 20:51:10,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:10,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:10,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:10,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:10,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:10,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:10,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 59 proven. 5133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:10,790 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:10,790 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:10,800 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:51:10,853 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:51:10,853 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:10,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:11,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 59 proven. 5133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:11,380 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:11,381 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 20:51:11,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 20:51:11,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 20:51:11,381 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:11,381 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 61 states. [2018-09-30 20:51:11,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:11,792 INFO L93 Difference]: Finished difference Result 186 states and 191 transitions. [2018-09-30 20:51:11,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 20:51:11,793 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 179 [2018-09-30 20:51:11,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:11,794 INFO L225 Difference]: With dead ends: 186 [2018-09-30 20:51:11,794 INFO L226 Difference]: Without dead ends: 182 [2018-09-30 20:51:11,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:51:11,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-09-30 20:51:11,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2018-09-30 20:51:11,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-09-30 20:51:11,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2018-09-30 20:51:11,799 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 179 [2018-09-30 20:51:11,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:11,799 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2018-09-30 20:51:11,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 20:51:11,799 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2018-09-30 20:51:11,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-09-30 20:51:11,800 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:11,800 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 59, 1, 1] [2018-09-30 20:51:11,800 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:11,801 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:11,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1145761721, now seen corresponding path program 38 times [2018-09-30 20:51:11,801 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:11,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:11,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:11,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:11,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:11,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:12,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:12,141 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:12,150 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:51:12,203 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:51:12,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:12,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:12,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:12,517 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:12,517 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 20:51:12,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 20:51:12,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 20:51:12,518 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:12,518 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 62 states. [2018-09-30 20:51:12,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:12,941 INFO L93 Difference]: Finished difference Result 188 states and 194 transitions. [2018-09-30 20:51:12,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 20:51:12,941 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 179 [2018-09-30 20:51:12,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:12,943 INFO L225 Difference]: With dead ends: 188 [2018-09-30 20:51:12,943 INFO L226 Difference]: Without dead ends: 184 [2018-09-30 20:51:12,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:51:12,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-09-30 20:51:12,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2018-09-30 20:51:12,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-09-30 20:51:12,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2018-09-30 20:51:12,946 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 179 [2018-09-30 20:51:12,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:12,947 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2018-09-30 20:51:12,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 20:51:12,947 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2018-09-30 20:51:12,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-30 20:51:12,947 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:12,948 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 59, 1, 1, 1] [2018-09-30 20:51:12,948 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:12,948 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:12,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1282737003, now seen corresponding path program 59 times [2018-09-30 20:51:12,948 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:12,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:12,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:12,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:12,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 60 proven. 5310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:13,287 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:13,287 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:13,294 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:51:13,408 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-09-30 20:51:13,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:13,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:13,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 60 proven. 5310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:13,737 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:13,737 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 20:51:13,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 20:51:13,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 20:51:13,738 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:13,738 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand 62 states. [2018-09-30 20:51:14,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:14,018 INFO L93 Difference]: Finished difference Result 189 states and 194 transitions. [2018-09-30 20:51:14,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 20:51:14,018 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 182 [2018-09-30 20:51:14,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:14,020 INFO L225 Difference]: With dead ends: 189 [2018-09-30 20:51:14,020 INFO L226 Difference]: Without dead ends: 185 [2018-09-30 20:51:14,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:51:14,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-30 20:51:14,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-30 20:51:14,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-30 20:51:14,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-09-30 20:51:14,024 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 182 [2018-09-30 20:51:14,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:14,024 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-09-30 20:51:14,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 20:51:14,024 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-09-30 20:51:14,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-30 20:51:14,025 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:14,025 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 60, 1, 1] [2018-09-30 20:51:14,025 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:14,025 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:14,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1282736941, now seen corresponding path program 39 times [2018-09-30 20:51:14,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:14,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:14,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:14,026 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:14,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:14,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:14,397 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:14,397 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:14,404 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:51:14,520 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 61 check-sat command(s) [2018-09-30 20:51:14,520 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:14,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:14,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:14,837 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:14,837 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 20:51:14,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 20:51:14,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 20:51:14,838 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:14,838 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 63 states. [2018-09-30 20:51:15,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:15,264 INFO L93 Difference]: Finished difference Result 191 states and 197 transitions. [2018-09-30 20:51:15,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 20:51:15,264 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 182 [2018-09-30 20:51:15,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:15,265 INFO L225 Difference]: With dead ends: 191 [2018-09-30 20:51:15,265 INFO L226 Difference]: Without dead ends: 187 [2018-09-30 20:51:15,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:51:15,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-30 20:51:15,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-30 20:51:15,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-30 20:51:15,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2018-09-30 20:51:15,268 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 182 [2018-09-30 20:51:15,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:15,269 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2018-09-30 20:51:15,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 20:51:15,269 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2018-09-30 20:51:15,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-09-30 20:51:15,269 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:15,270 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 60, 1, 1, 1] [2018-09-30 20:51:15,270 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:15,270 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:15,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1692584823, now seen corresponding path program 60 times [2018-09-30 20:51:15,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:15,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:15,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:15,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:15,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:15,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:15,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 61 proven. 5490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:15,870 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:15,870 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:15,878 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:51:15,992 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2018-09-30 20:51:15,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:15,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 0 proven. 5551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:16,738 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:16,739 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-09-30 20:51:16,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-30 20:51:16,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-30 20:51:16,740 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:16,740 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand 125 states. [2018-09-30 20:51:20,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:20,125 INFO L93 Difference]: Finished difference Result 194 states and 201 transitions. [2018-09-30 20:51:20,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-09-30 20:51:20,125 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 185 [2018-09-30 20:51:20,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:20,126 INFO L225 Difference]: With dead ends: 194 [2018-09-30 20:51:20,126 INFO L226 Difference]: Without dead ends: 190 [2018-09-30 20:51:20,127 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s Time [2018-09-30 20:51:20,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-09-30 20:51:20,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2018-09-30 20:51:20,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-09-30 20:51:20,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2018-09-30 20:51:20,130 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 185 [2018-09-30 20:51:20,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:20,130 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2018-09-30 20:51:20,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-30 20:51:20,131 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2018-09-30 20:51:20,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-30 20:51:20,131 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:20,131 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 61, 1, 1, 1] [2018-09-30 20:51:20,131 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:20,132 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:20,132 INFO L82 PathProgramCache]: Analyzing trace with hash -876967915, now seen corresponding path program 61 times [2018-09-30 20:51:20,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:20,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:20,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:20,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:20,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:20,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 62 proven. 5673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:20,629 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:20,629 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:20,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:51:20,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:20,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:21,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 62 proven. 5673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:21,106 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:21,106 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 20:51:21,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 20:51:21,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 20:51:21,107 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:21,107 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand 64 states. [2018-09-30 20:51:21,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:21,485 INFO L93 Difference]: Finished difference Result 195 states and 200 transitions. [2018-09-30 20:51:21,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 20:51:21,486 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 188 [2018-09-30 20:51:21,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:21,487 INFO L225 Difference]: With dead ends: 195 [2018-09-30 20:51:21,487 INFO L226 Difference]: Without dead ends: 191 [2018-09-30 20:51:21,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:51:21,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-30 20:51:21,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-30 20:51:21,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-30 20:51:21,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2018-09-30 20:51:21,492 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 188 [2018-09-30 20:51:21,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:21,492 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2018-09-30 20:51:21,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 20:51:21,493 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2018-09-30 20:51:21,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-30 20:51:21,493 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:21,494 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 62, 1, 1] [2018-09-30 20:51:21,494 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:21,494 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:21,494 INFO L82 PathProgramCache]: Analyzing trace with hash -876967853, now seen corresponding path program 40 times [2018-09-30 20:51:21,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:21,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:21,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:21,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:51:21,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:21,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:21,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:21,900 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:21,900 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:21,907 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:51:21,962 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:51:21,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:21,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:22,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:22,290 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:22,290 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 20:51:22,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 20:51:22,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 20:51:22,291 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:22,291 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 65 states. [2018-09-30 20:51:22,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:22,617 INFO L93 Difference]: Finished difference Result 197 states and 203 transitions. [2018-09-30 20:51:22,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 20:51:22,617 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 188 [2018-09-30 20:51:22,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:22,619 INFO L225 Difference]: With dead ends: 197 [2018-09-30 20:51:22,619 INFO L226 Difference]: Without dead ends: 193 [2018-09-30 20:51:22,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:51:22,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-30 20:51:22,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-30 20:51:22,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-30 20:51:22,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2018-09-30 20:51:22,624 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 188 [2018-09-30 20:51:22,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:22,624 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2018-09-30 20:51:22,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 20:51:22,624 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2018-09-30 20:51:22,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-09-30 20:51:22,625 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:22,625 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 62, 1, 1, 1] [2018-09-30 20:51:22,626 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:22,626 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:22,626 INFO L82 PathProgramCache]: Analyzing trace with hash 536344841, now seen corresponding path program 62 times [2018-09-30 20:51:22,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:22,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:22,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:22,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:22,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:22,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:23,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 63 proven. 5859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:23,028 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:23,028 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:23,035 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:51:23,090 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:51:23,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:23,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 63 proven. 5859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:23,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:23,512 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 20:51:23,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 20:51:23,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 20:51:23,513 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:23,513 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand 65 states. [2018-09-30 20:51:23,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:23,802 INFO L93 Difference]: Finished difference Result 198 states and 203 transitions. [2018-09-30 20:51:23,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 20:51:23,802 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 191 [2018-09-30 20:51:23,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:23,803 INFO L225 Difference]: With dead ends: 198 [2018-09-30 20:51:23,803 INFO L226 Difference]: Without dead ends: 194 [2018-09-30 20:51:23,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:51:23,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-09-30 20:51:23,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2018-09-30 20:51:23,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-09-30 20:51:23,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 196 transitions. [2018-09-30 20:51:23,808 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 196 transitions. Word has length 191 [2018-09-30 20:51:23,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:23,808 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 196 transitions. [2018-09-30 20:51:23,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 20:51:23,808 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 196 transitions. [2018-09-30 20:51:23,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-09-30 20:51:23,809 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:23,809 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 63, 1, 1] [2018-09-30 20:51:23,809 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:23,810 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:23,810 INFO L82 PathProgramCache]: Analyzing trace with hash 536344903, now seen corresponding path program 41 times [2018-09-30 20:51:23,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:23,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:23,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:23,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:23,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:24,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:24,318 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:24,318 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:24,325 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:51:24,440 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2018-09-30 20:51:24,440 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:24,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:24,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:24,774 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:24,775 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 20:51:24,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 20:51:24,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 20:51:24,776 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:24,776 INFO L87 Difference]: Start difference. First operand 194 states and 196 transitions. Second operand 66 states. [2018-09-30 20:51:25,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:25,090 INFO L93 Difference]: Finished difference Result 200 states and 206 transitions. [2018-09-30 20:51:25,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 20:51:25,091 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 191 [2018-09-30 20:51:25,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:25,091 INFO L225 Difference]: With dead ends: 200 [2018-09-30 20:51:25,091 INFO L226 Difference]: Without dead ends: 196 [2018-09-30 20:51:25,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:51:25,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-09-30 20:51:25,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-09-30 20:51:25,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-09-30 20:51:25,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2018-09-30 20:51:25,097 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 191 [2018-09-30 20:51:25,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:25,098 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2018-09-30 20:51:25,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 20:51:25,098 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2018-09-30 20:51:25,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-30 20:51:25,098 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:25,099 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 63, 1, 1, 1] [2018-09-30 20:51:25,099 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:25,099 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:25,099 INFO L82 PathProgramCache]: Analyzing trace with hash 972256149, now seen corresponding path program 63 times [2018-09-30 20:51:25,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:25,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:25,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:25,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:25,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:25,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:25,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 64 proven. 6048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:25,533 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:25,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:25,539 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:51:25,682 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 65 check-sat command(s) [2018-09-30 20:51:25,683 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:25,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:26,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 0 proven. 6112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:26,653 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:26,653 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-09-30 20:51:26,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-09-30 20:51:26,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-09-30 20:51:26,655 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:26,655 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand 131 states. [2018-09-30 20:51:30,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:30,222 INFO L93 Difference]: Finished difference Result 203 states and 210 transitions. [2018-09-30 20:51:30,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-30 20:51:30,222 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 194 [2018-09-30 20:51:30,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:30,223 INFO L225 Difference]: With dead ends: 203 [2018-09-30 20:51:30,223 INFO L226 Difference]: Without dead ends: 199 [2018-09-30 20:51:30,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s Time [2018-09-30 20:51:30,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-30 20:51:30,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-30 20:51:30,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-30 20:51:30,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2018-09-30 20:51:30,228 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 194 [2018-09-30 20:51:30,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:30,228 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2018-09-30 20:51:30,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-09-30 20:51:30,228 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2018-09-30 20:51:30,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-09-30 20:51:30,229 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:30,229 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 64, 1, 1, 1] [2018-09-30 20:51:30,229 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:30,229 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:30,230 INFO L82 PathProgramCache]: Analyzing trace with hash -775070327, now seen corresponding path program 64 times [2018-09-30 20:51:30,230 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:30,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:30,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:30,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:30,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:30,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:30,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 65 proven. 6240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:30,614 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:30,614 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:30,625 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:51:30,685 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:51:30,686 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:30,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:31,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 65 proven. 6240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:31,247 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:31,248 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 20:51:31,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 20:51:31,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 20:51:31,248 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:31,249 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand 67 states. [2018-09-30 20:51:31,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:31,715 INFO L93 Difference]: Finished difference Result 204 states and 209 transitions. [2018-09-30 20:51:31,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 20:51:31,716 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 197 [2018-09-30 20:51:31,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:31,717 INFO L225 Difference]: With dead ends: 204 [2018-09-30 20:51:31,717 INFO L226 Difference]: Without dead ends: 200 [2018-09-30 20:51:31,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:51:31,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-09-30 20:51:31,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2018-09-30 20:51:31,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-09-30 20:51:31,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2018-09-30 20:51:31,722 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 197 [2018-09-30 20:51:31,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:31,722 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2018-09-30 20:51:31,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 20:51:31,722 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2018-09-30 20:51:31,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-09-30 20:51:31,723 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:31,724 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 65, 1, 1] [2018-09-30 20:51:31,724 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:31,724 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:31,724 INFO L82 PathProgramCache]: Analyzing trace with hash -775070265, now seen corresponding path program 42 times [2018-09-30 20:51:31,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:31,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:31,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:31,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:31,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:32,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:32,104 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:32,104 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:32,111 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:51:32,240 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 66 check-sat command(s) [2018-09-30 20:51:32,240 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:32,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:32,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:32,582 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:32,582 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 20:51:32,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 20:51:32,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 20:51:32,583 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:32,583 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand 68 states. [2018-09-30 20:51:32,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:32,945 INFO L93 Difference]: Finished difference Result 206 states and 212 transitions. [2018-09-30 20:51:32,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 20:51:32,946 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 197 [2018-09-30 20:51:32,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:32,946 INFO L225 Difference]: With dead ends: 206 [2018-09-30 20:51:32,947 INFO L226 Difference]: Without dead ends: 202 [2018-09-30 20:51:32,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:51:32,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-09-30 20:51:32,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2018-09-30 20:51:32,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-09-30 20:51:32,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 204 transitions. [2018-09-30 20:51:32,951 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 204 transitions. Word has length 197 [2018-09-30 20:51:32,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:32,951 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 204 transitions. [2018-09-30 20:51:32,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 20:51:32,951 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 204 transitions. [2018-09-30 20:51:32,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-30 20:51:32,952 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:32,952 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 65, 1, 1, 1] [2018-09-30 20:51:32,952 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:32,952 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:32,952 INFO L82 PathProgramCache]: Analyzing trace with hash -374489323, now seen corresponding path program 65 times [2018-09-30 20:51:32,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:32,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:32,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:32,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:32,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:33,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 66 proven. 6435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:33,340 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:33,340 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:33,346 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:51:33,479 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-09-30 20:51:33,479 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:33,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 66 proven. 6435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:33,901 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:33,901 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 20:51:33,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 20:51:33,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 20:51:33,902 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:33,902 INFO L87 Difference]: Start difference. First operand 202 states and 204 transitions. Second operand 68 states. [2018-09-30 20:51:34,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:34,384 INFO L93 Difference]: Finished difference Result 207 states and 212 transitions. [2018-09-30 20:51:34,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 20:51:34,384 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 200 [2018-09-30 20:51:34,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:34,385 INFO L225 Difference]: With dead ends: 207 [2018-09-30 20:51:34,385 INFO L226 Difference]: Without dead ends: 203 [2018-09-30 20:51:34,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:51:34,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-30 20:51:34,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-30 20:51:34,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-30 20:51:34,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2018-09-30 20:51:34,390 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 200 [2018-09-30 20:51:34,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:34,390 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2018-09-30 20:51:34,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 20:51:34,391 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2018-09-30 20:51:34,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-30 20:51:34,391 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:34,391 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 66, 1, 1] [2018-09-30 20:51:34,392 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:34,392 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:34,392 INFO L82 PathProgramCache]: Analyzing trace with hash -374489261, now seen corresponding path program 43 times [2018-09-30 20:51:34,392 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:34,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:34,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:34,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:34,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:34,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:34,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:34,837 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:34,837 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:34,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:51:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:34,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:35,254 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:35,254 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 20:51:35,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 20:51:35,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 20:51:35,255 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:35,255 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 69 states. [2018-09-30 20:51:35,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:35,625 INFO L93 Difference]: Finished difference Result 209 states and 215 transitions. [2018-09-30 20:51:35,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 20:51:35,625 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 200 [2018-09-30 20:51:35,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:35,626 INFO L225 Difference]: With dead ends: 209 [2018-09-30 20:51:35,626 INFO L226 Difference]: Without dead ends: 205 [2018-09-30 20:51:35,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:51:35,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-30 20:51:35,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-30 20:51:35,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-30 20:51:35,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2018-09-30 20:51:35,631 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 200 [2018-09-30 20:51:35,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:35,631 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2018-09-30 20:51:35,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 20:51:35,631 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2018-09-30 20:51:35,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-09-30 20:51:35,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:35,632 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 66, 1, 1, 1] [2018-09-30 20:51:35,632 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:35,632 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:35,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1915052553, now seen corresponding path program 66 times [2018-09-30 20:51:35,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:35,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:35,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:35,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:51:35,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:36,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 67 proven. 6633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:36,281 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:36,281 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:36,288 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:51:36,417 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2018-09-30 20:51:36,418 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:36,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:37,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 0 proven. 6700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:37,269 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:37,269 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-09-30 20:51:37,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-09-30 20:51:37,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-09-30 20:51:37,270 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:37,270 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand 137 states. [2018-09-30 20:51:41,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:41,381 INFO L93 Difference]: Finished difference Result 212 states and 219 transitions. [2018-09-30 20:51:41,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-09-30 20:51:41,382 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 203 [2018-09-30 20:51:41,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:41,382 INFO L225 Difference]: With dead ends: 212 [2018-09-30 20:51:41,382 INFO L226 Difference]: Without dead ends: 208 [2018-09-30 20:51:41,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s Time [2018-09-30 20:51:41,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-09-30 20:51:41,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2018-09-30 20:51:41,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-09-30 20:51:41,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 210 transitions. [2018-09-30 20:51:41,386 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 210 transitions. Word has length 203 [2018-09-30 20:51:41,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:41,387 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 210 transitions. [2018-09-30 20:51:41,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-09-30 20:51:41,387 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 210 transitions. [2018-09-30 20:51:41,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-30 20:51:41,387 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:41,387 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 67, 1, 1, 1] [2018-09-30 20:51:41,388 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:41,388 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:41,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1281452693, now seen corresponding path program 67 times [2018-09-30 20:51:41,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:41,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:41,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:41,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:41,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:41,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:41,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 68 proven. 6834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:41,787 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:41,787 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:41,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:51:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:41,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:42,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 68 proven. 6834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:42,216 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:42,216 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 20:51:42,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 20:51:42,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 20:51:42,218 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:42,218 INFO L87 Difference]: Start difference. First operand 208 states and 210 transitions. Second operand 70 states. [2018-09-30 20:51:42,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:42,558 INFO L93 Difference]: Finished difference Result 213 states and 218 transitions. [2018-09-30 20:51:42,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 20:51:42,559 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 206 [2018-09-30 20:51:42,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:42,560 INFO L225 Difference]: With dead ends: 213 [2018-09-30 20:51:42,560 INFO L226 Difference]: Without dead ends: 209 [2018-09-30 20:51:42,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:51:42,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-30 20:51:42,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-09-30 20:51:42,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-30 20:51:42,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2018-09-30 20:51:42,566 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 206 [2018-09-30 20:51:42,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:42,566 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2018-09-30 20:51:42,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 20:51:42,567 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2018-09-30 20:51:42,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-30 20:51:42,567 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:42,568 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 68, 1, 1] [2018-09-30 20:51:42,568 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:42,568 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:42,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1281452755, now seen corresponding path program 44 times [2018-09-30 20:51:42,568 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:42,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:42,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:42,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:51:42,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:42,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:42,986 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:42,986 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:42,992 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:51:43,053 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:51:43,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:43,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:43,426 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:43,427 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 20:51:43,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 20:51:43,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 20:51:43,428 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:43,428 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand 71 states. [2018-09-30 20:51:43,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:43,944 INFO L93 Difference]: Finished difference Result 215 states and 221 transitions. [2018-09-30 20:51:43,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 20:51:43,944 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 206 [2018-09-30 20:51:43,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:43,945 INFO L225 Difference]: With dead ends: 215 [2018-09-30 20:51:43,945 INFO L226 Difference]: Without dead ends: 211 [2018-09-30 20:51:43,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:51:43,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-30 20:51:43,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-30 20:51:43,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-30 20:51:43,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2018-09-30 20:51:43,949 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 206 [2018-09-30 20:51:43,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:43,949 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2018-09-30 20:51:43,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 20:51:43,949 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2018-09-30 20:51:43,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-09-30 20:51:43,949 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:43,950 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 68, 1, 1, 1] [2018-09-30 20:51:43,950 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:43,950 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:43,950 INFO L82 PathProgramCache]: Analyzing trace with hash 2089289353, now seen corresponding path program 68 times [2018-09-30 20:51:43,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:43,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:43,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:43,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:43,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 69 proven. 7038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:44,349 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:44,349 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:44,355 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:51:44,430 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:51:44,431 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:44,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 69 proven. 7038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:44,853 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:44,854 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 20:51:44,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 20:51:44,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 20:51:44,855 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:44,855 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 71 states. [2018-09-30 20:51:45,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:45,376 INFO L93 Difference]: Finished difference Result 216 states and 221 transitions. [2018-09-30 20:51:45,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 20:51:45,377 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 209 [2018-09-30 20:51:45,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:45,377 INFO L225 Difference]: With dead ends: 216 [2018-09-30 20:51:45,378 INFO L226 Difference]: Without dead ends: 212 [2018-09-30 20:51:45,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:51:45,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-09-30 20:51:45,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2018-09-30 20:51:45,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-09-30 20:51:45,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 214 transitions. [2018-09-30 20:51:45,381 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 214 transitions. Word has length 209 [2018-09-30 20:51:45,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:45,382 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 214 transitions. [2018-09-30 20:51:45,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 20:51:45,382 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 214 transitions. [2018-09-30 20:51:45,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-09-30 20:51:45,383 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:45,383 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 69, 1, 1] [2018-09-30 20:51:45,383 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:45,383 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:45,383 INFO L82 PathProgramCache]: Analyzing trace with hash 2089289415, now seen corresponding path program 45 times [2018-09-30 20:51:45,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:45,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:45,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:45,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:45,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:45,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:45,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 0 proven. 7107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:45,787 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:45,787 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:45,794 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:51:45,936 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-30 20:51:45,936 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:45,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:46,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 0 proven. 7107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:46,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:46,512 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 20:51:46,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 20:51:46,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 20:51:46,513 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:46,514 INFO L87 Difference]: Start difference. First operand 212 states and 214 transitions. Second operand 72 states. [2018-09-30 20:51:47,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:47,067 INFO L93 Difference]: Finished difference Result 218 states and 224 transitions. [2018-09-30 20:51:47,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 20:51:47,067 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 209 [2018-09-30 20:51:47,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:47,068 INFO L225 Difference]: With dead ends: 218 [2018-09-30 20:51:47,068 INFO L226 Difference]: Without dead ends: 214 [2018-09-30 20:51:47,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:51:47,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-09-30 20:51:47,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2018-09-30 20:51:47,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-09-30 20:51:47,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 216 transitions. [2018-09-30 20:51:47,073 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 216 transitions. Word has length 209 [2018-09-30 20:51:47,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:47,074 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 216 transitions. [2018-09-30 20:51:47,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 20:51:47,074 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 216 transitions. [2018-09-30 20:51:47,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-30 20:51:47,074 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:47,074 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 69, 1, 1, 1] [2018-09-30 20:51:47,075 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:47,075 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:47,075 INFO L82 PathProgramCache]: Analyzing trace with hash -645499371, now seen corresponding path program 69 times [2018-09-30 20:51:47,075 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:47,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:47,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:47,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:47,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:47,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 70 proven. 7245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:47,608 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:47,608 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:47,620 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:51:47,761 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 71 check-sat command(s) [2018-09-30 20:51:47,762 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:47,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:48,618 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 7315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:48,638 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:48,639 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 142 [2018-09-30 20:51:48,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 143 states [2018-09-30 20:51:48,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2018-09-30 20:51:48,641 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:48,641 INFO L87 Difference]: Start difference. First operand 214 states and 216 transitions. Second operand 143 states. [2018-09-30 20:51:52,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:52,915 INFO L93 Difference]: Finished difference Result 221 states and 228 transitions. [2018-09-30 20:51:52,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-09-30 20:51:52,916 INFO L78 Accepts]: Start accepts. Automaton has 143 states. Word has length 212 [2018-09-30 20:51:52,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:52,916 INFO L225 Difference]: With dead ends: 221 [2018-09-30 20:51:52,916 INFO L226 Difference]: Without dead ends: 217 [2018-09-30 20:51:52,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s Time [2018-09-30 20:51:52,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-09-30 20:51:52,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-09-30 20:51:52,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-09-30 20:51:52,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2018-09-30 20:51:52,919 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 212 [2018-09-30 20:51:52,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:52,920 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2018-09-30 20:51:52,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 143 states. [2018-09-30 20:51:52,920 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2018-09-30 20:51:52,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-09-30 20:51:52,920 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:52,920 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 70, 1, 1, 1] [2018-09-30 20:51:52,921 INFO L423 AbstractCegarLoop]: === Iteration 117 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:52,921 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:52,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1501738231, now seen corresponding path program 70 times [2018-09-30 20:51:52,921 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:52,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:52,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:52,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:52,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:52,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:53,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7526 backedges. 71 proven. 7455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:53,339 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:53,340 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:53,347 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:51:53,411 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:51:53,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:53,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:53,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7526 backedges. 71 proven. 7455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:53,791 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:53,792 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-30 20:51:53,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 20:51:53,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 20:51:53,793 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:53,793 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand 73 states. [2018-09-30 20:51:54,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:54,389 INFO L93 Difference]: Finished difference Result 222 states and 227 transitions. [2018-09-30 20:51:54,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 20:51:54,390 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 215 [2018-09-30 20:51:54,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:54,391 INFO L225 Difference]: With dead ends: 222 [2018-09-30 20:51:54,391 INFO L226 Difference]: Without dead ends: 218 [2018-09-30 20:51:54,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:51:54,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-09-30 20:51:54,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2018-09-30 20:51:54,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-09-30 20:51:54,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 220 transitions. [2018-09-30 20:51:54,395 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 220 transitions. Word has length 215 [2018-09-30 20:51:54,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:54,395 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 220 transitions. [2018-09-30 20:51:54,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 20:51:54,396 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 220 transitions. [2018-09-30 20:51:54,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-09-30 20:51:54,396 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:54,396 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 71, 1, 1] [2018-09-30 20:51:54,396 INFO L423 AbstractCegarLoop]: === Iteration 118 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:54,396 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:54,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1501738169, now seen corresponding path program 46 times [2018-09-30 20:51:54,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:54,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:54,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:54,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:54,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7526 backedges. 0 proven. 7526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:54,813 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:54,813 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:54,821 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:51:54,885 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:51:54,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:54,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:55,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7526 backedges. 0 proven. 7526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:55,263 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:55,263 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-30 20:51:55,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 20:51:55,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 20:51:55,264 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:55,264 INFO L87 Difference]: Start difference. First operand 218 states and 220 transitions. Second operand 74 states. [2018-09-30 20:51:55,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:55,710 INFO L93 Difference]: Finished difference Result 224 states and 230 transitions. [2018-09-30 20:51:55,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 20:51:55,710 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 215 [2018-09-30 20:51:55,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:55,711 INFO L225 Difference]: With dead ends: 224 [2018-09-30 20:51:55,711 INFO L226 Difference]: Without dead ends: 220 [2018-09-30 20:51:55,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:51:55,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2018-09-30 20:51:55,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2018-09-30 20:51:55,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-09-30 20:51:55,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2018-09-30 20:51:55,715 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 215 [2018-09-30 20:51:55,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:55,715 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2018-09-30 20:51:55,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 20:51:55,715 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2018-09-30 20:51:55,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-30 20:51:55,716 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:55,716 INFO L375 BasicCegarLoop]: trace histogram [72, 72, 71, 1, 1, 1] [2018-09-30 20:51:55,716 INFO L423 AbstractCegarLoop]: === Iteration 119 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:55,717 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:55,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1902845547, now seen corresponding path program 71 times [2018-09-30 20:51:55,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:55,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:55,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:55,717 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:55,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:56,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 72 proven. 7668 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:56,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:56,146 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:56,154 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:51:56,302 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2018-09-30 20:51:56,302 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:56,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:56,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 72 proven. 7668 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:56,865 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:56,865 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 20:51:56,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 20:51:56,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 20:51:56,866 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:56,867 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand 74 states. [2018-09-30 20:51:57,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:57,418 INFO L93 Difference]: Finished difference Result 225 states and 230 transitions. [2018-09-30 20:51:57,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 20:51:57,419 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 218 [2018-09-30 20:51:57,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:57,419 INFO L225 Difference]: With dead ends: 225 [2018-09-30 20:51:57,419 INFO L226 Difference]: Without dead ends: 221 [2018-09-30 20:51:57,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:51:57,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-30 20:51:57,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-09-30 20:51:57,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-30 20:51:57,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 223 transitions. [2018-09-30 20:51:57,424 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 223 transitions. Word has length 218 [2018-09-30 20:51:57,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:57,424 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 223 transitions. [2018-09-30 20:51:57,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 20:51:57,424 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 223 transitions. [2018-09-30 20:51:57,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-30 20:51:57,424 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:57,425 INFO L375 BasicCegarLoop]: trace histogram [72, 72, 72, 1, 1] [2018-09-30 20:51:57,425 INFO L423 AbstractCegarLoop]: === Iteration 120 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:57,425 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:57,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1902845485, now seen corresponding path program 47 times [2018-09-30 20:51:57,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:57,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:57,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:57,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:57,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:57,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:57,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 0 proven. 7740 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:57,866 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:57,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:57,873 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:51:58,066 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2018-09-30 20:51:58,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:58,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:58,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 0 proven. 7740 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:58,449 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:58,449 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 20:51:58,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 20:51:58,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 20:51:58,450 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:58,450 INFO L87 Difference]: Start difference. First operand 221 states and 223 transitions. Second operand 75 states. [2018-09-30 20:51:58,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:58,888 INFO L93 Difference]: Finished difference Result 227 states and 233 transitions. [2018-09-30 20:51:58,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 20:51:58,889 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 218 [2018-09-30 20:51:58,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:58,889 INFO L225 Difference]: With dead ends: 227 [2018-09-30 20:51:58,890 INFO L226 Difference]: Without dead ends: 223 [2018-09-30 20:51:58,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:51:58,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-30 20:51:58,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-09-30 20:51:58,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-09-30 20:51:58,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 225 transitions. [2018-09-30 20:51:58,893 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 225 transitions. Word has length 218 [2018-09-30 20:51:58,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:58,893 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 225 transitions. [2018-09-30 20:51:58,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 20:51:58,893 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 225 transitions. [2018-09-30 20:51:58,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-09-30 20:51:58,894 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:58,894 INFO L375 BasicCegarLoop]: trace histogram [73, 73, 72, 1, 1, 1] [2018-09-30 20:51:58,894 INFO L423 AbstractCegarLoop]: === Iteration 121 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:58,894 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:58,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1603088265, now seen corresponding path program 72 times [2018-09-30 20:51:58,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:58,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:58,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:58,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:58,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:59,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7957 backedges. 73 proven. 7884 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:59,323 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:59,323 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:59,330 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:51:59,483 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 74 check-sat command(s) [2018-09-30 20:51:59,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:59,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:00,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7957 backedges. 0 proven. 7957 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:00,393 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:00,393 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 148 [2018-09-30 20:52:00,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-09-30 20:52:00,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-09-30 20:52:00,395 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:00,395 INFO L87 Difference]: Start difference. First operand 223 states and 225 transitions. Second operand 149 states. [2018-09-30 20:52:04,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:04,992 INFO L93 Difference]: Finished difference Result 230 states and 237 transitions. [2018-09-30 20:52:04,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-09-30 20:52:04,992 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 221 [2018-09-30 20:52:04,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:04,993 INFO L225 Difference]: With dead ends: 230 [2018-09-30 20:52:04,993 INFO L226 Difference]: Without dead ends: 226 [2018-09-30 20:52:04,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s Time [2018-09-30 20:52:04,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-09-30 20:52:04,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2018-09-30 20:52:04,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-09-30 20:52:04,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 228 transitions. [2018-09-30 20:52:04,996 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 228 transitions. Word has length 221 [2018-09-30 20:52:04,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:04,997 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 228 transitions. [2018-09-30 20:52:04,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-09-30 20:52:04,997 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 228 transitions. [2018-09-30 20:52:04,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-09-30 20:52:04,997 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:04,998 INFO L375 BasicCegarLoop]: trace histogram [74, 74, 73, 1, 1, 1] [2018-09-30 20:52:04,998 INFO L423 AbstractCegarLoop]: === Iteration 122 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:04,998 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:04,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1862577429, now seen corresponding path program 73 times [2018-09-30 20:52:04,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:04,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:04,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:04,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:04,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:05,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:05,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 74 proven. 8103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:05,446 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:05,446 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:05,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:05,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:05,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:05,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 74 proven. 8103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:05,972 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:05,972 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 20:52:05,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 20:52:05,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 20:52:05,973 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:05,973 INFO L87 Difference]: Start difference. First operand 226 states and 228 transitions. Second operand 76 states. [2018-09-30 20:52:06,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:06,495 INFO L93 Difference]: Finished difference Result 231 states and 236 transitions. [2018-09-30 20:52:06,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 20:52:06,495 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 224 [2018-09-30 20:52:06,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:06,496 INFO L225 Difference]: With dead ends: 231 [2018-09-30 20:52:06,496 INFO L226 Difference]: Without dead ends: 227 [2018-09-30 20:52:06,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:52:06,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-09-30 20:52:06,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-09-30 20:52:06,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-09-30 20:52:06,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 229 transitions. [2018-09-30 20:52:06,499 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 229 transitions. Word has length 224 [2018-09-30 20:52:06,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:06,500 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 229 transitions. [2018-09-30 20:52:06,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 20:52:06,500 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 229 transitions. [2018-09-30 20:52:06,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-09-30 20:52:06,500 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:06,501 INFO L375 BasicCegarLoop]: trace histogram [74, 74, 74, 1, 1] [2018-09-30 20:52:06,501 INFO L423 AbstractCegarLoop]: === Iteration 123 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:06,501 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:06,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1862577491, now seen corresponding path program 48 times [2018-09-30 20:52:06,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:06,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:06,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:06,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:06,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:06,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:07,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 0 proven. 8177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:07,123 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:07,123 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:07,130 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:52:07,286 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 75 check-sat command(s) [2018-09-30 20:52:07,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:07,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:07,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 0 proven. 8177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:07,691 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:07,691 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 20:52:07,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 20:52:07,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 20:52:07,692 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:07,692 INFO L87 Difference]: Start difference. First operand 227 states and 229 transitions. Second operand 77 states. [2018-09-30 20:52:08,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:08,160 INFO L93 Difference]: Finished difference Result 233 states and 239 transitions. [2018-09-30 20:52:08,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 20:52:08,161 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 224 [2018-09-30 20:52:08,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:08,162 INFO L225 Difference]: With dead ends: 233 [2018-09-30 20:52:08,162 INFO L226 Difference]: Without dead ends: 229 [2018-09-30 20:52:08,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:52:08,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-09-30 20:52:08,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-09-30 20:52:08,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-09-30 20:52:08,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 231 transitions. [2018-09-30 20:52:08,166 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 231 transitions. Word has length 224 [2018-09-30 20:52:08,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:08,166 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 231 transitions. [2018-09-30 20:52:08,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 20:52:08,166 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 231 transitions. [2018-09-30 20:52:08,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-09-30 20:52:08,167 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:08,167 INFO L375 BasicCegarLoop]: trace histogram [75, 75, 74, 1, 1, 1] [2018-09-30 20:52:08,167 INFO L423 AbstractCegarLoop]: === Iteration 124 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:08,167 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:08,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1363129353, now seen corresponding path program 74 times [2018-09-30 20:52:08,168 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:08,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:08,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:08,168 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:08,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:08,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 75 proven. 8325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:08,621 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:08,621 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:08,627 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:52:08,694 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:52:08,694 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:08,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:09,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 75 proven. 8325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:09,100 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:09,101 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-30 20:52:09,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 20:52:09,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 20:52:09,102 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:09,102 INFO L87 Difference]: Start difference. First operand 229 states and 231 transitions. Second operand 77 states. [2018-09-30 20:52:09,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:09,534 INFO L93 Difference]: Finished difference Result 234 states and 239 transitions. [2018-09-30 20:52:09,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 20:52:09,534 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 227 [2018-09-30 20:52:09,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:09,535 INFO L225 Difference]: With dead ends: 234 [2018-09-30 20:52:09,535 INFO L226 Difference]: Without dead ends: 230 [2018-09-30 20:52:09,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:52:09,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-09-30 20:52:09,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2018-09-30 20:52:09,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2018-09-30 20:52:09,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 232 transitions. [2018-09-30 20:52:09,539 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 232 transitions. Word has length 227 [2018-09-30 20:52:09,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:09,539 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 232 transitions. [2018-09-30 20:52:09,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 20:52:09,539 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 232 transitions. [2018-09-30 20:52:09,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-09-30 20:52:09,540 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:09,540 INFO L375 BasicCegarLoop]: trace histogram [75, 75, 75, 1, 1] [2018-09-30 20:52:09,540 INFO L423 AbstractCegarLoop]: === Iteration 125 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:09,540 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:09,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1363129415, now seen corresponding path program 49 times [2018-09-30 20:52:09,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:09,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:09,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:09,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:09,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 0 proven. 8400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:10,054 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:10,054 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:10,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:10,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 0 proven. 8400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:10,538 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:10,539 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-30 20:52:10,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 20:52:10,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 20:52:10,540 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:10,540 INFO L87 Difference]: Start difference. First operand 230 states and 232 transitions. Second operand 78 states. [2018-09-30 20:52:11,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:11,044 INFO L93 Difference]: Finished difference Result 236 states and 242 transitions. [2018-09-30 20:52:11,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 20:52:11,045 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 227 [2018-09-30 20:52:11,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:11,046 INFO L225 Difference]: With dead ends: 236 [2018-09-30 20:52:11,046 INFO L226 Difference]: Without dead ends: 232 [2018-09-30 20:52:11,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:52:11,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2018-09-30 20:52:11,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2018-09-30 20:52:11,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-09-30 20:52:11,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 234 transitions. [2018-09-30 20:52:11,049 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 234 transitions. Word has length 227 [2018-09-30 20:52:11,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:11,050 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 234 transitions. [2018-09-30 20:52:11,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 20:52:11,050 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 234 transitions. [2018-09-30 20:52:11,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-09-30 20:52:11,051 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:11,051 INFO L375 BasicCegarLoop]: trace histogram [76, 76, 75, 1, 1, 1] [2018-09-30 20:52:11,051 INFO L423 AbstractCegarLoop]: === Iteration 126 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:11,051 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:11,051 INFO L82 PathProgramCache]: Analyzing trace with hash 72210581, now seen corresponding path program 75 times [2018-09-30 20:52:11,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:11,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:11,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:11,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:11,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:11,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8626 backedges. 76 proven. 8550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:11,502 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:11,502 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:11,511 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:52:11,677 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 77 check-sat command(s) [2018-09-30 20:52:11,677 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:11,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:12,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8626 backedges. 0 proven. 8626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:12,819 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:12,819 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 154 [2018-09-30 20:52:12,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 155 states [2018-09-30 20:52:12,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2018-09-30 20:52:12,821 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:12,822 INFO L87 Difference]: Start difference. First operand 232 states and 234 transitions. Second operand 155 states. [2018-09-30 20:52:17,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:17,753 INFO L93 Difference]: Finished difference Result 239 states and 246 transitions. [2018-09-30 20:52:17,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2018-09-30 20:52:17,754 INFO L78 Accepts]: Start accepts. Automaton has 155 states. Word has length 230 [2018-09-30 20:52:17,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:17,754 INFO L225 Difference]: With dead ends: 239 [2018-09-30 20:52:17,754 INFO L226 Difference]: Without dead ends: 235 [2018-09-30 20:52:17,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s Time [2018-09-30 20:52:17,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-09-30 20:52:17,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-09-30 20:52:17,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-09-30 20:52:17,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 237 transitions. [2018-09-30 20:52:17,758 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 237 transitions. Word has length 230 [2018-09-30 20:52:17,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:17,758 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 237 transitions. [2018-09-30 20:52:17,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 155 states. [2018-09-30 20:52:17,759 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 237 transitions. [2018-09-30 20:52:17,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-09-30 20:52:17,759 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:17,760 INFO L375 BasicCegarLoop]: trace histogram [77, 77, 76, 1, 1, 1] [2018-09-30 20:52:17,760 INFO L423 AbstractCegarLoop]: === Iteration 127 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:17,760 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:17,760 INFO L82 PathProgramCache]: Analyzing trace with hash -551757687, now seen corresponding path program 76 times [2018-09-30 20:52:17,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:17,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:17,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:17,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:17,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:17,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8855 backedges. 77 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:18,311 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:18,311 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:18,320 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:52:18,400 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:52:18,400 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:18,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8855 backedges. 77 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:18,804 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:18,804 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-30 20:52:18,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 20:52:18,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 20:52:18,805 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:18,805 INFO L87 Difference]: Start difference. First operand 235 states and 237 transitions. Second operand 79 states. [2018-09-30 20:52:19,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:19,463 INFO L93 Difference]: Finished difference Result 240 states and 245 transitions. [2018-09-30 20:52:19,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 20:52:19,464 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 233 [2018-09-30 20:52:19,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:19,464 INFO L225 Difference]: With dead ends: 240 [2018-09-30 20:52:19,464 INFO L226 Difference]: Without dead ends: 236 [2018-09-30 20:52:19,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:52:19,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2018-09-30 20:52:19,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2018-09-30 20:52:19,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2018-09-30 20:52:19,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 238 transitions. [2018-09-30 20:52:19,469 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 238 transitions. Word has length 233 [2018-09-30 20:52:19,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:19,469 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 238 transitions. [2018-09-30 20:52:19,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 20:52:19,469 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 238 transitions. [2018-09-30 20:52:19,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-09-30 20:52:19,470 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:19,470 INFO L375 BasicCegarLoop]: trace histogram [77, 77, 77, 1, 1] [2018-09-30 20:52:19,470 INFO L423 AbstractCegarLoop]: === Iteration 128 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:19,470 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:19,470 INFO L82 PathProgramCache]: Analyzing trace with hash -551757625, now seen corresponding path program 50 times [2018-09-30 20:52:19,471 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:19,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:19,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:19,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:19,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:19,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:19,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8855 backedges. 0 proven. 8855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:19,955 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:19,955 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:19,963 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:52:20,033 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:52:20,033 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:20,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8855 backedges. 0 proven. 8855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:20,438 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:20,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-30 20:52:20,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 20:52:20,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 20:52:20,439 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:20,439 INFO L87 Difference]: Start difference. First operand 236 states and 238 transitions. Second operand 80 states. [2018-09-30 20:52:20,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:20,909 INFO L93 Difference]: Finished difference Result 242 states and 248 transitions. [2018-09-30 20:52:20,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 20:52:20,909 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 233 [2018-09-30 20:52:20,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:20,910 INFO L225 Difference]: With dead ends: 242 [2018-09-30 20:52:20,911 INFO L226 Difference]: Without dead ends: 238 [2018-09-30 20:52:20,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:52:20,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-09-30 20:52:20,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2018-09-30 20:52:20,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2018-09-30 20:52:20,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 240 transitions. [2018-09-30 20:52:20,915 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 240 transitions. Word has length 233 [2018-09-30 20:52:20,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:20,916 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 240 transitions. [2018-09-30 20:52:20,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 20:52:20,916 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 240 transitions. [2018-09-30 20:52:20,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-09-30 20:52:20,916 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:20,917 INFO L375 BasicCegarLoop]: trace histogram [78, 78, 77, 1, 1, 1] [2018-09-30 20:52:20,917 INFO L423 AbstractCegarLoop]: === Iteration 129 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:20,917 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:20,917 INFO L82 PathProgramCache]: Analyzing trace with hash -571972587, now seen corresponding path program 77 times [2018-09-30 20:52:20,917 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:20,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:20,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:20,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:20,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:20,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:21,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9087 backedges. 78 proven. 9009 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:21,433 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:21,434 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:21,445 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:52:21,607 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 79 check-sat command(s) [2018-09-30 20:52:21,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:21,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:22,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9087 backedges. 78 proven. 9009 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:22,114 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:22,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 20:52:22,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 20:52:22,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 20:52:22,115 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:22,115 INFO L87 Difference]: Start difference. First operand 238 states and 240 transitions. Second operand 80 states. [2018-09-30 20:52:22,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:22,729 INFO L93 Difference]: Finished difference Result 243 states and 248 transitions. [2018-09-30 20:52:22,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 20:52:22,730 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 236 [2018-09-30 20:52:22,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:22,730 INFO L225 Difference]: With dead ends: 243 [2018-09-30 20:52:22,730 INFO L226 Difference]: Without dead ends: 239 [2018-09-30 20:52:22,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:52:22,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-09-30 20:52:22,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2018-09-30 20:52:22,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-09-30 20:52:22,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 241 transitions. [2018-09-30 20:52:22,735 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 241 transitions. Word has length 236 [2018-09-30 20:52:22,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:22,736 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 241 transitions. [2018-09-30 20:52:22,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 20:52:22,736 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 241 transitions. [2018-09-30 20:52:22,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-09-30 20:52:22,737 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:22,737 INFO L375 BasicCegarLoop]: trace histogram [78, 78, 78, 1, 1] [2018-09-30 20:52:22,737 INFO L423 AbstractCegarLoop]: === Iteration 130 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:22,737 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:22,737 INFO L82 PathProgramCache]: Analyzing trace with hash -571972525, now seen corresponding path program 51 times [2018-09-30 20:52:22,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:22,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:22,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:22,738 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:22,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9087 backedges. 0 proven. 9087 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:23,249 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:23,249 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:23,257 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:52:23,425 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 79 check-sat command(s) [2018-09-30 20:52:23,425 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:23,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9087 backedges. 0 proven. 9087 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:23,848 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:23,849 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 20:52:23,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 20:52:23,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 20:52:23,850 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:23,850 INFO L87 Difference]: Start difference. First operand 239 states and 241 transitions. Second operand 81 states. [2018-09-30 20:52:24,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:24,296 INFO L93 Difference]: Finished difference Result 245 states and 251 transitions. [2018-09-30 20:52:24,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 20:52:24,297 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 236 [2018-09-30 20:52:24,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:24,298 INFO L225 Difference]: With dead ends: 245 [2018-09-30 20:52:24,298 INFO L226 Difference]: Without dead ends: 241 [2018-09-30 20:52:24,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:52:24,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-09-30 20:52:24,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2018-09-30 20:52:24,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-09-30 20:52:24,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 243 transitions. [2018-09-30 20:52:24,302 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 243 transitions. Word has length 236 [2018-09-30 20:52:24,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:24,302 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 243 transitions. [2018-09-30 20:52:24,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 20:52:24,303 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 243 transitions. [2018-09-30 20:52:24,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-09-30 20:52:24,303 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:24,303 INFO L375 BasicCegarLoop]: trace histogram [79, 79, 78, 1, 1, 1] [2018-09-30 20:52:24,303 INFO L423 AbstractCegarLoop]: === Iteration 131 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:24,304 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:24,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1498637047, now seen corresponding path program 78 times [2018-09-30 20:52:24,304 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:24,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:24,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:24,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:24,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:24,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:24,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9322 backedges. 79 proven. 9243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:24,818 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:24,818 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:24,825 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:52:24,994 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 80 check-sat command(s) [2018-09-30 20:52:24,994 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:24,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:26,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9322 backedges. 0 proven. 9322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:26,154 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:26,154 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 160 [2018-09-30 20:52:26,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 161 states [2018-09-30 20:52:26,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2018-09-30 20:52:26,156 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:26,156 INFO L87 Difference]: Start difference. First operand 241 states and 243 transitions. Second operand 161 states. [2018-09-30 20:52:31,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:31,698 INFO L93 Difference]: Finished difference Result 248 states and 255 transitions. [2018-09-30 20:52:31,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2018-09-30 20:52:31,698 INFO L78 Accepts]: Start accepts. Automaton has 161 states. Word has length 239 [2018-09-30 20:52:31,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:31,699 INFO L225 Difference]: With dead ends: 248 [2018-09-30 20:52:31,699 INFO L226 Difference]: Without dead ends: 244 [2018-09-30 20:52:31,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s Time [2018-09-30 20:52:31,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-09-30 20:52:31,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2018-09-30 20:52:31,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-09-30 20:52:31,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 246 transitions. [2018-09-30 20:52:31,704 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 246 transitions. Word has length 239 [2018-09-30 20:52:31,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:31,704 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 246 transitions. [2018-09-30 20:52:31,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 161 states. [2018-09-30 20:52:31,704 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 246 transitions. [2018-09-30 20:52:31,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-09-30 20:52:31,705 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:31,705 INFO L375 BasicCegarLoop]: trace histogram [80, 80, 79, 1, 1, 1] [2018-09-30 20:52:31,706 INFO L423 AbstractCegarLoop]: === Iteration 132 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:31,706 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:31,706 INFO L82 PathProgramCache]: Analyzing trace with hash 290213781, now seen corresponding path program 79 times [2018-09-30 20:52:31,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:31,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:31,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:31,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:31,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:31,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:32,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9560 backedges. 80 proven. 9480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:32,341 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:32,341 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:32,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:32,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9560 backedges. 80 proven. 9480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:32,906 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:32,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 20:52:32,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 20:52:32,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 20:52:32,908 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:32,908 INFO L87 Difference]: Start difference. First operand 244 states and 246 transitions. Second operand 82 states. [2018-09-30 20:52:33,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:33,457 INFO L93 Difference]: Finished difference Result 249 states and 254 transitions. [2018-09-30 20:52:33,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 20:52:33,457 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 242 [2018-09-30 20:52:33,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:33,458 INFO L225 Difference]: With dead ends: 249 [2018-09-30 20:52:33,458 INFO L226 Difference]: Without dead ends: 245 [2018-09-30 20:52:33,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:52:33,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-09-30 20:52:33,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2018-09-30 20:52:33,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-09-30 20:52:33,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 247 transitions. [2018-09-30 20:52:33,462 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 247 transitions. Word has length 242 [2018-09-30 20:52:33,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:33,462 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 247 transitions. [2018-09-30 20:52:33,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 20:52:33,462 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 247 transitions. [2018-09-30 20:52:33,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-09-30 20:52:33,463 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:33,463 INFO L375 BasicCegarLoop]: trace histogram [80, 80, 80, 1, 1] [2018-09-30 20:52:33,463 INFO L423 AbstractCegarLoop]: === Iteration 133 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:33,463 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:33,463 INFO L82 PathProgramCache]: Analyzing trace with hash 290213843, now seen corresponding path program 52 times [2018-09-30 20:52:33,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:33,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:33,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:33,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:33,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:34,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9560 backedges. 0 proven. 9560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:34,104 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:34,104 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:34,111 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:52:34,182 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:52:34,182 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:34,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:34,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9560 backedges. 0 proven. 9560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:34,608 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:34,609 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 20:52:34,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 20:52:34,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 20:52:34,610 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:34,610 INFO L87 Difference]: Start difference. First operand 245 states and 247 transitions. Second operand 83 states. [2018-09-30 20:52:35,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:35,104 INFO L93 Difference]: Finished difference Result 251 states and 257 transitions. [2018-09-30 20:52:35,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 20:52:35,104 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 242 [2018-09-30 20:52:35,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:35,105 INFO L225 Difference]: With dead ends: 251 [2018-09-30 20:52:35,105 INFO L226 Difference]: Without dead ends: 247 [2018-09-30 20:52:35,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:52:35,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-09-30 20:52:35,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2018-09-30 20:52:35,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-09-30 20:52:35,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 249 transitions. [2018-09-30 20:52:35,110 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 249 transitions. Word has length 242 [2018-09-30 20:52:35,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:35,110 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 249 transitions. [2018-09-30 20:52:35,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 20:52:35,110 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 249 transitions. [2018-09-30 20:52:35,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-09-30 20:52:35,111 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:35,111 INFO L375 BasicCegarLoop]: trace histogram [81, 81, 80, 1, 1, 1] [2018-09-30 20:52:35,111 INFO L423 AbstractCegarLoop]: === Iteration 134 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:35,111 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:35,111 INFO L82 PathProgramCache]: Analyzing trace with hash -8978039, now seen corresponding path program 80 times [2018-09-30 20:52:35,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:35,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:35,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:35,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:35,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:35,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:35,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 81 proven. 9720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:35,638 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:35,638 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:35,644 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:52:35,715 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:52:35,716 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:35,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:36,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 81 proven. 9720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:36,151 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:36,151 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-30 20:52:36,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 20:52:36,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 20:52:36,152 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:36,153 INFO L87 Difference]: Start difference. First operand 247 states and 249 transitions. Second operand 83 states. [2018-09-30 20:52:36,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:36,630 INFO L93 Difference]: Finished difference Result 252 states and 257 transitions. [2018-09-30 20:52:36,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 20:52:36,630 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 245 [2018-09-30 20:52:36,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:36,631 INFO L225 Difference]: With dead ends: 252 [2018-09-30 20:52:36,631 INFO L226 Difference]: Without dead ends: 248 [2018-09-30 20:52:36,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:52:36,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-09-30 20:52:36,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2018-09-30 20:52:36,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2018-09-30 20:52:36,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 250 transitions. [2018-09-30 20:52:36,635 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 250 transitions. Word has length 245 [2018-09-30 20:52:36,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:36,635 INFO L480 AbstractCegarLoop]: Abstraction has 248 states and 250 transitions. [2018-09-30 20:52:36,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 20:52:36,635 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 250 transitions. [2018-09-30 20:52:36,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-09-30 20:52:36,636 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:36,636 INFO L375 BasicCegarLoop]: trace histogram [81, 81, 81, 1, 1] [2018-09-30 20:52:36,636 INFO L423 AbstractCegarLoop]: === Iteration 135 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:36,636 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:36,636 INFO L82 PathProgramCache]: Analyzing trace with hash -8977977, now seen corresponding path program 53 times [2018-09-30 20:52:36,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:36,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:36,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:36,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:36,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:36,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:37,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:37,128 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:37,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:37,135 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:52:37,310 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 82 check-sat command(s) [2018-09-30 20:52:37,310 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:37,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:37,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:37,907 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:37,907 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-30 20:52:37,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 20:52:37,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 20:52:37,908 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:37,908 INFO L87 Difference]: Start difference. First operand 248 states and 250 transitions. Second operand 84 states. [2018-09-30 20:52:38,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:38,543 INFO L93 Difference]: Finished difference Result 254 states and 260 transitions. [2018-09-30 20:52:38,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 20:52:38,544 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 245 [2018-09-30 20:52:38,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:38,545 INFO L225 Difference]: With dead ends: 254 [2018-09-30 20:52:38,545 INFO L226 Difference]: Without dead ends: 250 [2018-09-30 20:52:38,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:52:38,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2018-09-30 20:52:38,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2018-09-30 20:52:38,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-09-30 20:52:38,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 252 transitions. [2018-09-30 20:52:38,549 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 252 transitions. Word has length 245 [2018-09-30 20:52:38,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:38,549 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 252 transitions. [2018-09-30 20:52:38,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 20:52:38,549 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 252 transitions. [2018-09-30 20:52:38,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-09-30 20:52:38,550 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:38,550 INFO L375 BasicCegarLoop]: trace histogram [82, 82, 81, 1, 1, 1] [2018-09-30 20:52:38,550 INFO L423 AbstractCegarLoop]: === Iteration 136 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:38,550 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:38,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1175348459, now seen corresponding path program 81 times [2018-09-30 20:52:38,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:38,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:38,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:38,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:38,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:38,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:39,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10045 backedges. 82 proven. 9963 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:39,077 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:39,077 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:39,084 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:52:39,267 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 83 check-sat command(s) [2018-09-30 20:52:39,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:39,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10045 backedges. 0 proven. 10045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:40,334 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:40,334 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 166 [2018-09-30 20:52:40,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 167 states [2018-09-30 20:52:40,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2018-09-30 20:52:40,336 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:40,336 INFO L87 Difference]: Start difference. First operand 250 states and 252 transitions. Second operand 167 states. [2018-09-30 20:52:46,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:46,108 INFO L93 Difference]: Finished difference Result 257 states and 264 transitions. [2018-09-30 20:52:46,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2018-09-30 20:52:46,108 INFO L78 Accepts]: Start accepts. Automaton has 167 states. Word has length 248 [2018-09-30 20:52:46,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:46,109 INFO L225 Difference]: With dead ends: 257 [2018-09-30 20:52:46,109 INFO L226 Difference]: Without dead ends: 253 [2018-09-30 20:52:46,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s Time [2018-09-30 20:52:46,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-09-30 20:52:46,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2018-09-30 20:52:46,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-09-30 20:52:46,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 255 transitions. [2018-09-30 20:52:46,113 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 255 transitions. Word has length 248 [2018-09-30 20:52:46,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:46,113 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 255 transitions. [2018-09-30 20:52:46,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 167 states. [2018-09-30 20:52:46,113 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 255 transitions. [2018-09-30 20:52:46,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-09-30 20:52:46,114 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:46,114 INFO L375 BasicCegarLoop]: trace histogram [83, 83, 82, 1, 1, 1] [2018-09-30 20:52:46,114 INFO L423 AbstractCegarLoop]: === Iteration 137 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:46,114 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:46,114 INFO L82 PathProgramCache]: Analyzing trace with hash 2063861257, now seen corresponding path program 82 times [2018-09-30 20:52:46,114 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:46,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:46,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:46,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:46,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:46,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 10292 backedges. 83 proven. 10209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:46,674 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:46,675 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:46,681 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:52:46,755 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:52:46,755 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:46,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:47,196 INFO L134 CoverageAnalysis]: Checked inductivity of 10292 backedges. 83 proven. 10209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:47,217 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:47,217 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-30 20:52:47,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 20:52:47,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 20:52:47,218 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:47,218 INFO L87 Difference]: Start difference. First operand 253 states and 255 transitions. Second operand 85 states. [2018-09-30 20:52:48,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:48,116 INFO L93 Difference]: Finished difference Result 258 states and 263 transitions. [2018-09-30 20:52:48,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 20:52:48,116 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 251 [2018-09-30 20:52:48,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:48,117 INFO L225 Difference]: With dead ends: 258 [2018-09-30 20:52:48,117 INFO L226 Difference]: Without dead ends: 254 [2018-09-30 20:52:48,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:52:48,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-09-30 20:52:48,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2018-09-30 20:52:48,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-09-30 20:52:48,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 256 transitions. [2018-09-30 20:52:48,121 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 256 transitions. Word has length 251 [2018-09-30 20:52:48,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:48,121 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 256 transitions. [2018-09-30 20:52:48,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 20:52:48,121 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 256 transitions. [2018-09-30 20:52:48,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-09-30 20:52:48,122 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:48,122 INFO L375 BasicCegarLoop]: trace histogram [83, 83, 83, 1, 1] [2018-09-30 20:52:48,122 INFO L423 AbstractCegarLoop]: === Iteration 138 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:48,123 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:48,123 INFO L82 PathProgramCache]: Analyzing trace with hash 2063861319, now seen corresponding path program 54 times [2018-09-30 20:52:48,123 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:48,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:48,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:48,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:48,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:48,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:48,677 INFO L134 CoverageAnalysis]: Checked inductivity of 10292 backedges. 0 proven. 10292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:48,677 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:48,677 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:48,684 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:52:48,865 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 84 check-sat command(s) [2018-09-30 20:52:48,865 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:48,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:49,286 INFO L134 CoverageAnalysis]: Checked inductivity of 10292 backedges. 0 proven. 10292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:49,307 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:49,307 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-30 20:52:49,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 20:52:49,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 20:52:49,308 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:49,308 INFO L87 Difference]: Start difference. First operand 254 states and 256 transitions. Second operand 86 states. [2018-09-30 20:52:49,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:49,807 INFO L93 Difference]: Finished difference Result 260 states and 266 transitions. [2018-09-30 20:52:49,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 20:52:49,807 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 251 [2018-09-30 20:52:49,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:49,808 INFO L225 Difference]: With dead ends: 260 [2018-09-30 20:52:49,808 INFO L226 Difference]: Without dead ends: 256 [2018-09-30 20:52:49,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:52:49,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2018-09-30 20:52:49,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2018-09-30 20:52:49,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-09-30 20:52:49,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 258 transitions. [2018-09-30 20:52:49,812 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 258 transitions. Word has length 251 [2018-09-30 20:52:49,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:49,812 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 258 transitions. [2018-09-30 20:52:49,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 20:52:49,812 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 258 transitions. [2018-09-30 20:52:49,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-09-30 20:52:49,813 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:49,813 INFO L375 BasicCegarLoop]: trace histogram [84, 84, 83, 1, 1, 1] [2018-09-30 20:52:49,813 INFO L423 AbstractCegarLoop]: === Iteration 139 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:49,813 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:49,813 INFO L82 PathProgramCache]: Analyzing trace with hash 2035304085, now seen corresponding path program 83 times [2018-09-30 20:52:49,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:49,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:49,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:49,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:49,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:50,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10542 backedges. 84 proven. 10458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:50,334 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:50,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:50,343 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:52:50,520 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2018-09-30 20:52:50,520 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:50,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10542 backedges. 84 proven. 10458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:50,983 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:50,983 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-30 20:52:50,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 20:52:50,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 20:52:50,984 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:50,984 INFO L87 Difference]: Start difference. First operand 256 states and 258 transitions. Second operand 86 states. [2018-09-30 20:52:51,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:51,768 INFO L93 Difference]: Finished difference Result 261 states and 266 transitions. [2018-09-30 20:52:51,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 20:52:51,769 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 254 [2018-09-30 20:52:51,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:51,770 INFO L225 Difference]: With dead ends: 261 [2018-09-30 20:52:51,770 INFO L226 Difference]: Without dead ends: 257 [2018-09-30 20:52:51,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:52:51,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-09-30 20:52:51,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2018-09-30 20:52:51,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2018-09-30 20:52:51,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 259 transitions. [2018-09-30 20:52:51,775 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 259 transitions. Word has length 254 [2018-09-30 20:52:51,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:51,776 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 259 transitions. [2018-09-30 20:52:51,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 20:52:51,776 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 259 transitions. [2018-09-30 20:52:51,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-09-30 20:52:51,777 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:51,777 INFO L375 BasicCegarLoop]: trace histogram [84, 84, 84, 1, 1] [2018-09-30 20:52:51,777 INFO L423 AbstractCegarLoop]: === Iteration 140 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:51,777 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:51,778 INFO L82 PathProgramCache]: Analyzing trace with hash 2035304147, now seen corresponding path program 55 times [2018-09-30 20:52:51,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:51,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:51,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:51,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:51,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:52,421 INFO L134 CoverageAnalysis]: Checked inductivity of 10542 backedges. 0 proven. 10542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:52,421 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:52,421 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:52,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:52,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:52,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10542 backedges. 0 proven. 10542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:53,188 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:53,188 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-30 20:52:53,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 20:52:53,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 20:52:53,190 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:53,190 INFO L87 Difference]: Start difference. First operand 257 states and 259 transitions. Second operand 87 states. [2018-09-30 20:52:53,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:53,813 INFO L93 Difference]: Finished difference Result 263 states and 269 transitions. [2018-09-30 20:52:53,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 20:52:53,813 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 254 [2018-09-30 20:52:53,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:53,814 INFO L225 Difference]: With dead ends: 263 [2018-09-30 20:52:53,814 INFO L226 Difference]: Without dead ends: 259 [2018-09-30 20:52:53,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:52:53,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-09-30 20:52:53,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2018-09-30 20:52:53,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-09-30 20:52:53,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 261 transitions. [2018-09-30 20:52:53,818 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 261 transitions. Word has length 254 [2018-09-30 20:52:53,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:53,818 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 261 transitions. [2018-09-30 20:52:53,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 20:52:53,819 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 261 transitions. [2018-09-30 20:52:53,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-09-30 20:52:53,819 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:53,819 INFO L375 BasicCegarLoop]: trace histogram [85, 85, 84, 1, 1, 1] [2018-09-30 20:52:53,820 INFO L423 AbstractCegarLoop]: === Iteration 141 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:53,820 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:53,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1692117641, now seen corresponding path program 84 times [2018-09-30 20:52:53,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:53,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:53,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:53,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:53,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:53,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:54,347 INFO L134 CoverageAnalysis]: Checked inductivity of 10795 backedges. 85 proven. 10710 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:54,348 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:54,348 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:54,356 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:52:54,538 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 86 check-sat command(s) [2018-09-30 20:52:54,538 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:54,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:55,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10795 backedges. 0 proven. 10795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:55,618 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:55,618 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 172 [2018-09-30 20:52:55,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 173 states [2018-09-30 20:52:55,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2018-09-30 20:52:55,620 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:55,620 INFO L87 Difference]: Start difference. First operand 259 states and 261 transitions. Second operand 173 states. Received shutdown request... [2018-09-30 20:52:56,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:52:56,213 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 20:52:56,219 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 20:52:56,220 INFO L202 PluginConnector]: Adding new model HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 08:52:56 BoogieIcfgContainer [2018-09-30 20:52:56,220 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 20:52:56,220 INFO L168 Benchmark]: Toolchain (without parser) took 233505.19 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 278.9 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 412.9 MB). Peak memory consumption was 691.8 MB. Max. memory is 7.1 GB. [2018-09-30 20:52:56,222 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:52:56,223 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.02 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:52:56,223 INFO L168 Benchmark]: Boogie Preprocessor took 21.31 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:52:56,223 INFO L168 Benchmark]: RCFGBuilder took 271.19 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:52:56,224 INFO L168 Benchmark]: TraceAbstraction took 233165.84 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 278.9 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 391.7 MB). Peak memory consumption was 670.6 MB. Max. memory is 7.1 GB. [2018-09-30 20:52:56,226 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.02 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.31 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 271.19 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 233165.84 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 278.9 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 391.7 MB). Peak memory consumption was 670.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 30]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 30). Cancelled while BasicCegarLoop was constructing difference of abstraction (259states) and FLOYD_HOARE automaton (currently 23 states, 173 states before enhancement), while ReachableStatesComputation was computing reachable states (31 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 233.0s OverallTime, 141 OverallIterations, 85 TraceHistogramMax, 112.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 814 SDtfs, 3667 SDslu, 15613 SDs, 0 SdLazy, 16901 SolverSat, 1624 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26806 GetRequests, 16997 SyntacticMatches, 0 SemanticMatches, 9809 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 135.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=259occurred in iteration=140, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 140 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 10.9s SatisfiabilityAnalysisTime, 101.6s InterpolantComputationTime, 36731 NumberOfCodeBlocks, 36731 NumberOfCodeBlocksAsserted, 3394 NumberOfCheckSat, 36451 ConstructedInterpolants, 0 QuantifiedInterpolants, 18759391 SizeOfPredicates, 0 NumberOfNonLiveVariables, 43447 ConjunctsInSsa, 6252 ConjunctsInUnsatCore, 280 InterpolantComputations, 2 PerfectInterpolantSequences, 6028/1026081 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/HiddenEqualityWithBranches.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_20-52-56-237.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/HiddenEqualityWithBranches.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_20-52-56-237.csv Completed graceful shutdown