java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired01-BackwardSuccess.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2eb0a67 [2018-10-03 08:50:38,671 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-03 08:50:38,676 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-03 08:50:38,688 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-03 08:50:38,688 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-03 08:50:38,689 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-03 08:50:38,691 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-03 08:50:38,692 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-03 08:50:38,694 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-03 08:50:38,695 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-03 08:50:38,696 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-03 08:50:38,723 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-03 08:50:38,738 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-03 08:50:38,739 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-03 08:50:38,740 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-03 08:50:38,740 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-03 08:50:38,740 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-03 08:50:38,740 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-03 08:50:38,741 INFO L133 SettingsManager]: * Use SBE=true [2018-10-03 08:50:38,741 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-03 08:50:38,741 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-03 08:50:38,741 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-03 08:50:38,741 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-03 08:50:38,742 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-03 08:50:38,742 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-03 08:50:38,742 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-03 08:50:38,742 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-03 08:50:38,742 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-03 08:50:38,743 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-03 08:50:38,743 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-03 08:50:38,743 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-03 08:50:38,743 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-03 08:50:38,743 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-03 08:50:38,744 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-03 08:50:38,744 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 08:50:38,744 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-03 08:50:38,744 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-03 08:50:38,744 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-03 08:50:38,745 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-03 08:50:38,745 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-03 08:50:38,745 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-03 08:50:38,745 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-03 08:50:38,789 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-03 08:50:38,802 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-03 08:50:38,806 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-03 08:50:38,808 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-03 08:50:38,808 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-03 08:50:38,809 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired01-BackwardSuccess.bpl [2018-10-03 08:50:38,809 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired01-BackwardSuccess.bpl' [2018-10-03 08:50:38,858 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-03 08:50:38,862 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-03 08:50:38,863 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-03 08:50:38,863 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-03 08:50:38,863 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-03 08:50:38,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:50:38" (1/1) ... [2018-10-03 08:50:38,897 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:50:38" (1/1) ... [2018-10-03 08:50:38,902 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-03 08:50:38,902 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-03 08:50:38,903 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-03 08:50:38,905 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-03 08:50:38,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-03 08:50:38,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-03 08:50:38,906 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-03 08:50:38,918 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:50:38" (1/1) ... [2018-10-03 08:50:38,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:50:38" (1/1) ... [2018-10-03 08:50:38,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:50:38" (1/1) ... [2018-10-03 08:50:38,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:50:38" (1/1) ... [2018-10-03 08:50:38,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:50:38" (1/1) ... [2018-10-03 08:50:38,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:50:38" (1/1) ... [2018-10-03 08:50:38,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:50:38" (1/1) ... [2018-10-03 08:50:38,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-03 08:50:38,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-03 08:50:38,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-03 08:50:38,928 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-03 08:50:38,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:50:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 08:50:39,014 INFO L130 BoogieDeclarations]: Found specification of procedure proc [2018-10-03 08:50:39,014 INFO L138 BoogieDeclarations]: Found implementation of procedure proc [2018-10-03 08:50:39,182 INFO L337 CfgBuilder]: Using library mode [2018-10-03 08:50:39,183 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:50:39 BoogieIcfgContainer [2018-10-03 08:50:39,183 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-03 08:50:39,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-03 08:50:39,184 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-03 08:50:39,190 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-03 08:50:39,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:50:38" (1/2) ... [2018-10-03 08:50:39,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fd970c2 and model type DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 08:50:39, skipping insertion in model container [2018-10-03 08:50:39,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:50:39" (2/2) ... [2018-10-03 08:50:39,199 INFO L112 eAbstractionObserver]: Analyzing ICFG DivisibilityInterpolantRequired01-BackwardSuccess.bpl [2018-10-03 08:50:39,208 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-03 08:50:39,218 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-03 08:50:39,269 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-03 08:50:39,270 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-03 08:50:39,270 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-03 08:50:39,270 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-03 08:50:39,270 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-03 08:50:39,270 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-03 08:50:39,271 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-03 08:50:39,271 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-03 08:50:39,271 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-03 08:50:39,286 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-10-03 08:50:39,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-10-03 08:50:39,294 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:39,295 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-10-03 08:50:39,296 INFO L423 AbstractCegarLoop]: === Iteration 1 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:39,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:39,307 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-10-03 08:50:39,309 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:39,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:39,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:39,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:50:39,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:39,543 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:50:39,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-03 08:50:39,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-03 08:50:39,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-03 08:50:39,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-03 08:50:39,562 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-10-03 08:50:39,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:39,600 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-03 08:50:39,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-03 08:50:39,602 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-10-03 08:50:39,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:39,614 INFO L225 Difference]: With dead ends: 9 [2018-10-03 08:50:39,614 INFO L226 Difference]: Without dead ends: 4 [2018-10-03 08:50:39,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-03 08:50:39,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-10-03 08:50:39,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-10-03 08:50:39,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-10-03 08:50:39,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-10-03 08:50:39,658 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-10-03 08:50:39,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:39,659 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-10-03 08:50:39,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-03 08:50:39,659 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-10-03 08:50:39,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-03 08:50:39,660 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:39,660 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-03 08:50:39,660 INFO L423 AbstractCegarLoop]: === Iteration 2 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:39,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:39,661 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-10-03 08:50:39,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:39,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:39,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:39,663 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:50:39,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:39,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:39,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:39,848 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:39,848 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:39,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:50:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:39,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:39,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:39,936 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:39,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-10-03 08:50:39,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-03 08:50:39,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-03 08:50:39,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:50:39,938 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 4 states. [2018-10-03 08:50:40,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:40,003 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-10-03 08:50:40,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-03 08:50:40,005 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2018-10-03 08:50:40,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:40,006 INFO L225 Difference]: With dead ends: 6 [2018-10-03 08:50:40,006 INFO L226 Difference]: Without dead ends: 5 [2018-10-03 08:50:40,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:50:40,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-10-03 08:50:40,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-10-03 08:50:40,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-03 08:50:40,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-10-03 08:50:40,010 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-10-03 08:50:40,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:40,010 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-10-03 08:50:40,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-03 08:50:40,011 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-10-03 08:50:40,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-03 08:50:40,011 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:40,011 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-10-03 08:50:40,012 INFO L423 AbstractCegarLoop]: === Iteration 3 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:40,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:40,012 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-10-03 08:50:40,012 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:40,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:40,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:40,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:50:40,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:40,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:40,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:40,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:40,117 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:40,128 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:50:40,134 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:50:40,134 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:40,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:40,178 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:40,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-03 08:50:40,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 08:50:40,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 08:50:40,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:50:40,180 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-10-03 08:50:40,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:40,252 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-10-03 08:50:40,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 08:50:40,252 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-10-03 08:50:40,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:40,253 INFO L225 Difference]: With dead ends: 7 [2018-10-03 08:50:40,253 INFO L226 Difference]: Without dead ends: 6 [2018-10-03 08:50:40,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:50:40,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-03 08:50:40,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-03 08:50:40,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-03 08:50:40,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-03 08:50:40,256 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-03 08:50:40,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:40,257 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-03 08:50:40,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 08:50:40,257 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-03 08:50:40,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-03 08:50:40,258 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:40,258 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-10-03 08:50:40,259 INFO L423 AbstractCegarLoop]: === Iteration 4 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:40,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:40,259 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-10-03 08:50:40,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:40,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:40,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:40,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:40,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:40,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:40,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:40,424 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:40,424 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:40,435 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:50:40,482 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-03 08:50:40,483 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:40,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:40,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:40,567 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:40,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-03 08:50:40,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 08:50:40,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 08:50:40,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:50:40,569 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-10-03 08:50:40,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:40,698 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-10-03 08:50:40,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:50:40,699 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-10-03 08:50:40,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:40,700 INFO L225 Difference]: With dead ends: 8 [2018-10-03 08:50:40,700 INFO L226 Difference]: Without dead ends: 7 [2018-10-03 08:50:40,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:50:40,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-03 08:50:40,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-03 08:50:40,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-03 08:50:40,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-03 08:50:40,707 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-03 08:50:40,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:40,708 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-03 08:50:40,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 08:50:40,709 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-03 08:50:40,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-03 08:50:40,709 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:40,709 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-10-03 08:50:40,709 INFO L423 AbstractCegarLoop]: === Iteration 5 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:40,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:40,710 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-10-03 08:50:40,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:40,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:40,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:40,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:40,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:40,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:40,867 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:40,867 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:40,876 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:50:40,887 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:50:40,887 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:40,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:40,897 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:40,920 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:40,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-03 08:50:40,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:50:40,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:50:40,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:50:40,922 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-10-03 08:50:41,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:41,030 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-03 08:50:41,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:50:41,031 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-10-03 08:50:41,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:41,032 INFO L225 Difference]: With dead ends: 9 [2018-10-03 08:50:41,033 INFO L226 Difference]: Without dead ends: 8 [2018-10-03 08:50:41,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:50:41,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-03 08:50:41,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-03 08:50:41,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-03 08:50:41,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-03 08:50:41,040 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-03 08:50:41,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:41,040 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-03 08:50:41,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:50:41,041 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-03 08:50:41,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-03 08:50:41,041 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:41,041 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-10-03 08:50:41,042 INFO L423 AbstractCegarLoop]: === Iteration 6 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:41,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:41,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-10-03 08:50:41,044 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:41,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:41,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:41,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:41,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:41,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:41,248 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:41,249 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:41,249 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:41,261 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:50:41,269 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-03 08:50:41,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:41,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:41,282 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:41,303 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:41,303 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 08:50:41,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:50:41,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:50:41,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:50:41,304 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-10-03 08:50:41,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:41,412 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-03 08:50:41,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:50:41,414 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-10-03 08:50:41,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:41,415 INFO L225 Difference]: With dead ends: 10 [2018-10-03 08:50:41,415 INFO L226 Difference]: Without dead ends: 9 [2018-10-03 08:50:41,416 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:50:41,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-03 08:50:41,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-03 08:50:41,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-03 08:50:41,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-03 08:50:41,420 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-03 08:50:41,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:41,420 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-03 08:50:41,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:50:41,420 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-03 08:50:41,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-03 08:50:41,421 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:41,421 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-10-03 08:50:41,421 INFO L423 AbstractCegarLoop]: === Iteration 7 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:41,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:41,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-10-03 08:50:41,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:41,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:41,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:41,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:41,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:41,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:41,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:41,897 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:41,907 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:50:41,914 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-03 08:50:41,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:41,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:41,929 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:41,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:41,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:50:41,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:50:41,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:50:41,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:50:41,951 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2018-10-03 08:50:42,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:42,086 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-03 08:50:42,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:50:42,087 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-10-03 08:50:42,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:42,087 INFO L225 Difference]: With dead ends: 11 [2018-10-03 08:50:42,088 INFO L226 Difference]: Without dead ends: 10 [2018-10-03 08:50:42,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:50:42,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-03 08:50:42,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-03 08:50:42,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-03 08:50:42,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-03 08:50:42,092 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-03 08:50:42,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:42,093 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-03 08:50:42,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:50:42,093 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-03 08:50:42,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-03 08:50:42,094 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:42,094 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-10-03 08:50:42,094 INFO L423 AbstractCegarLoop]: === Iteration 8 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:42,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:42,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-10-03 08:50:42,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:42,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:42,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:42,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:42,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:42,255 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:42,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:42,255 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:42,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:50:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:42,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:42,277 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:42,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:42,299 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:50:42,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:50:42,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:50:42,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:50:42,300 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-10-03 08:50:42,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:42,408 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-03 08:50:42,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:50:42,409 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-10-03 08:50:42,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:42,410 INFO L225 Difference]: With dead ends: 12 [2018-10-03 08:50:42,410 INFO L226 Difference]: Without dead ends: 11 [2018-10-03 08:50:42,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:50:42,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-03 08:50:42,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-03 08:50:42,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-03 08:50:42,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-03 08:50:42,415 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-03 08:50:42,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:42,415 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-03 08:50:42,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:50:42,416 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-03 08:50:42,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-03 08:50:42,416 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:42,416 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-10-03 08:50:42,417 INFO L423 AbstractCegarLoop]: === Iteration 9 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:42,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:42,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-10-03 08:50:42,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:42,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:42,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:42,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:50:42,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:42,632 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:42,632 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:42,643 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:50:42,657 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:50:42,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:42,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:42,666 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:42,687 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:42,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:50:42,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:50:42,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:50:42,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:50:42,688 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 11 states. [2018-10-03 08:50:42,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:42,807 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-03 08:50:42,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:50:42,807 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2018-10-03 08:50:42,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:42,808 INFO L225 Difference]: With dead ends: 13 [2018-10-03 08:50:42,808 INFO L226 Difference]: Without dead ends: 12 [2018-10-03 08:50:42,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:50:42,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-03 08:50:42,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-03 08:50:42,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-03 08:50:42,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-03 08:50:42,812 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-03 08:50:42,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:42,813 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-03 08:50:42,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:50:42,813 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-03 08:50:42,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-03 08:50:42,814 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:42,814 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-10-03 08:50:42,814 INFO L423 AbstractCegarLoop]: === Iteration 10 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:42,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:42,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-10-03 08:50:42,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:42,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:42,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:42,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:42,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:43,000 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:43,000 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:43,001 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:43,009 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:50:43,021 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-03 08:50:43,021 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:43,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:43,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:43,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:50:43,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-03 08:50:43,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-03 08:50:43,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:50:43,086 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-10-03 08:50:43,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:43,209 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-03 08:50:43,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-03 08:50:43,210 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-10-03 08:50:43,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:43,211 INFO L225 Difference]: With dead ends: 14 [2018-10-03 08:50:43,211 INFO L226 Difference]: Without dead ends: 13 [2018-10-03 08:50:43,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:50:43,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-03 08:50:43,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-03 08:50:43,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-03 08:50:43,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-03 08:50:43,214 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-03 08:50:43,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:43,215 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-03 08:50:43,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-03 08:50:43,215 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-03 08:50:43,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-03 08:50:43,215 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:43,216 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-10-03 08:50:43,216 INFO L423 AbstractCegarLoop]: === Iteration 11 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:43,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:43,216 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-10-03 08:50:43,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:43,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:43,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:43,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:43,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:43,372 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:43,372 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:43,387 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:50:43,399 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:50:43,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:43,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:43,439 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:43,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-03 08:50:43,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-03 08:50:43,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-03 08:50:43,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:50:43,440 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-10-03 08:50:43,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:43,564 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-03 08:50:43,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-03 08:50:43,565 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-10-03 08:50:43,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:43,566 INFO L225 Difference]: With dead ends: 15 [2018-10-03 08:50:43,566 INFO L226 Difference]: Without dead ends: 14 [2018-10-03 08:50:43,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:50:43,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-03 08:50:43,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-03 08:50:43,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-03 08:50:43,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-03 08:50:43,572 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-03 08:50:43,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:43,573 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-03 08:50:43,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-03 08:50:43,573 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-03 08:50:43,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:50:43,573 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:43,574 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-10-03 08:50:43,574 INFO L423 AbstractCegarLoop]: === Iteration 12 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:43,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:43,574 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-10-03 08:50:43,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:43,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:43,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:43,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:43,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:43,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:43,801 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:43,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:43,801 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:43,816 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:50:43,833 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-03 08:50:43,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:43,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:43,848 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:43,876 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:43,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-03 08:50:43,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 08:50:43,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 08:50:43,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:50:43,878 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-10-03 08:50:44,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:44,220 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-03 08:50:44,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-03 08:50:44,221 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-10-03 08:50:44,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:44,222 INFO L225 Difference]: With dead ends: 16 [2018-10-03 08:50:44,222 INFO L226 Difference]: Without dead ends: 15 [2018-10-03 08:50:44,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:50:44,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-03 08:50:44,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-03 08:50:44,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-03 08:50:44,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-03 08:50:44,226 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-03 08:50:44,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:44,227 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-03 08:50:44,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 08:50:44,227 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-03 08:50:44,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-03 08:50:44,227 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:44,228 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-10-03 08:50:44,228 INFO L423 AbstractCegarLoop]: === Iteration 13 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:44,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:44,228 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-10-03 08:50:44,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:44,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:44,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:44,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:44,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:44,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:44,514 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:44,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:44,515 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:44,524 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:50:44,537 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 08:50:44,537 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:44,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:44,546 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:44,570 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:44,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-03 08:50:44,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-03 08:50:44,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-03 08:50:44,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:50:44,572 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-10-03 08:50:44,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:44,744 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-03 08:50:44,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-03 08:50:44,745 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-10-03 08:50:44,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:44,746 INFO L225 Difference]: With dead ends: 17 [2018-10-03 08:50:44,746 INFO L226 Difference]: Without dead ends: 16 [2018-10-03 08:50:44,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:50:44,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-03 08:50:44,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-03 08:50:44,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-03 08:50:44,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-03 08:50:44,752 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-03 08:50:44,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:44,752 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-03 08:50:44,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-03 08:50:44,752 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-03 08:50:44,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:50:44,753 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:44,753 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-10-03 08:50:44,753 INFO L423 AbstractCegarLoop]: === Iteration 14 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:44,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:44,754 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-10-03 08:50:44,754 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:44,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:44,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:44,755 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:44,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:44,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:45,012 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:45,012 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:45,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:45,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:50:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:45,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:45,038 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:45,058 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:45,059 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-03 08:50:45,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-03 08:50:45,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-03 08:50:45,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:50:45,059 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-10-03 08:50:45,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:45,371 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-03 08:50:45,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-03 08:50:45,371 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-10-03 08:50:45,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:45,372 INFO L225 Difference]: With dead ends: 18 [2018-10-03 08:50:45,372 INFO L226 Difference]: Without dead ends: 17 [2018-10-03 08:50:45,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:50:45,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-03 08:50:45,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-03 08:50:45,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-03 08:50:45,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-03 08:50:45,378 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-03 08:50:45,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:45,378 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-03 08:50:45,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-03 08:50:45,378 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-03 08:50:45,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-03 08:50:45,379 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:45,379 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-10-03 08:50:45,379 INFO L423 AbstractCegarLoop]: === Iteration 15 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:45,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:45,380 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-10-03 08:50:45,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:45,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:45,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:45,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:50:45,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:45,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:45,723 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:45,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:45,724 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:45,731 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:50:45,758 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:50:45,759 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:45,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:45,815 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:45,836 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:45,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-03 08:50:45,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 08:50:45,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 08:50:45,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:50:45,837 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-10-03 08:50:46,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:46,264 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-03 08:50:46,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-03 08:50:46,264 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-10-03 08:50:46,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:46,265 INFO L225 Difference]: With dead ends: 19 [2018-10-03 08:50:46,265 INFO L226 Difference]: Without dead ends: 18 [2018-10-03 08:50:46,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:50:46,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-03 08:50:46,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-03 08:50:46,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-03 08:50:46,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-03 08:50:46,272 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-03 08:50:46,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:46,273 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-03 08:50:46,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 08:50:46,273 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-03 08:50:46,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:50:46,274 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:46,274 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-10-03 08:50:46,274 INFO L423 AbstractCegarLoop]: === Iteration 16 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:46,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:46,275 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-10-03 08:50:46,275 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:46,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:46,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:46,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:46,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:46,562 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:46,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:46,563 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:46,572 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:50:46,591 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 08:50:46,591 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:46,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:46,606 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:46,627 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:46,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-03 08:50:46,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-03 08:50:46,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-03 08:50:46,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:50:46,628 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-10-03 08:50:46,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:46,824 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-03 08:50:46,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-03 08:50:46,824 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-10-03 08:50:46,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:46,825 INFO L225 Difference]: With dead ends: 20 [2018-10-03 08:50:46,825 INFO L226 Difference]: Without dead ends: 19 [2018-10-03 08:50:46,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:50:46,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-03 08:50:46,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-03 08:50:46,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-03 08:50:46,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-03 08:50:46,830 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-03 08:50:46,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:46,831 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-03 08:50:46,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-03 08:50:46,831 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-03 08:50:46,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-03 08:50:46,831 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:46,831 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-10-03 08:50:46,832 INFO L423 AbstractCegarLoop]: === Iteration 17 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:46,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:46,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-10-03 08:50:46,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:46,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:46,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:46,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:46,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:47,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:47,156 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:47,163 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:50:47,170 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:50:47,171 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:47,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:47,181 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:47,210 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:47,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-03 08:50:47,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-03 08:50:47,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-03 08:50:47,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:50:47,211 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 19 states. [2018-10-03 08:50:47,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:47,496 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-03 08:50:47,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-03 08:50:47,497 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2018-10-03 08:50:47,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:47,497 INFO L225 Difference]: With dead ends: 21 [2018-10-03 08:50:47,498 INFO L226 Difference]: Without dead ends: 20 [2018-10-03 08:50:47,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:50:47,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-03 08:50:47,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-03 08:50:47,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-03 08:50:47,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-03 08:50:47,503 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-03 08:50:47,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:47,504 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-03 08:50:47,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-03 08:50:47,504 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-03 08:50:47,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:50:47,505 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:47,505 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-10-03 08:50:47,505 INFO L423 AbstractCegarLoop]: === Iteration 18 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:47,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:47,505 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-10-03 08:50:47,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:47,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:47,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:47,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:47,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:47,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:47,985 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:47,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:47,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:47,993 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:50:48,003 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-03 08:50:48,004 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:48,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:48,018 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:48,038 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:48,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-03 08:50:48,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 08:50:48,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 08:50:48,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:50:48,039 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-10-03 08:50:48,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:48,308 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-03 08:50:48,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-03 08:50:48,309 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-10-03 08:50:48,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:48,310 INFO L225 Difference]: With dead ends: 22 [2018-10-03 08:50:48,310 INFO L226 Difference]: Without dead ends: 21 [2018-10-03 08:50:48,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:50:48,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-03 08:50:48,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-03 08:50:48,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-03 08:50:48,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-03 08:50:48,315 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-03 08:50:48,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:48,315 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-03 08:50:48,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 08:50:48,315 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-03 08:50:48,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-03 08:50:48,316 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:48,316 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-10-03 08:50:48,316 INFO L423 AbstractCegarLoop]: === Iteration 19 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:48,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:48,317 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-10-03 08:50:48,317 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:48,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:48,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:48,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:48,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:48,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:48,709 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:48,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:48,710 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:48,720 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:50:48,736 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-03 08:50:48,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:48,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:48,746 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:48,766 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:48,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-03 08:50:48,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-03 08:50:48,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-03 08:50:48,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:50:48,767 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-10-03 08:50:49,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:49,058 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-03 08:50:49,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-03 08:50:49,059 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-10-03 08:50:49,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:49,060 INFO L225 Difference]: With dead ends: 23 [2018-10-03 08:50:49,060 INFO L226 Difference]: Without dead ends: 22 [2018-10-03 08:50:49,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:50:49,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-03 08:50:49,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-03 08:50:49,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 08:50:49,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-03 08:50:49,065 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-03 08:50:49,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:49,066 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-03 08:50:49,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-03 08:50:49,066 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-03 08:50:49,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-03 08:50:49,067 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:49,067 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-10-03 08:50:49,067 INFO L423 AbstractCegarLoop]: === Iteration 20 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:49,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:49,068 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-10-03 08:50:49,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:49,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:49,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:49,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:49,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:49,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:49,472 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:49,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:50:49,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:49,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:49,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:49,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-03 08:50:49,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-03 08:50:49,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-03 08:50:49,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:50:49,526 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-10-03 08:50:49,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:49,874 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-03 08:50:49,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-03 08:50:49,874 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-10-03 08:50:49,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:49,875 INFO L225 Difference]: With dead ends: 24 [2018-10-03 08:50:49,875 INFO L226 Difference]: Without dead ends: 23 [2018-10-03 08:50:49,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:50:49,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-03 08:50:49,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-03 08:50:49,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-03 08:50:49,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-03 08:50:49,881 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-03 08:50:49,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:49,881 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-03 08:50:49,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-03 08:50:49,882 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-03 08:50:49,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-03 08:50:49,882 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:49,882 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-10-03 08:50:49,883 INFO L423 AbstractCegarLoop]: === Iteration 21 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:49,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:49,883 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-10-03 08:50:49,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:49,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:49,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:49,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:50:49,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:50,825 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:50,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:50,825 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:50,835 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:50:50,851 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:50:50,851 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:50,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:50,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:50,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-03 08:50:50,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-03 08:50:50,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-03 08:50:50,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:50:50,883 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 23 states. [2018-10-03 08:50:51,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:51,222 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-03 08:50:51,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-03 08:50:51,222 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2018-10-03 08:50:51,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:51,223 INFO L225 Difference]: With dead ends: 25 [2018-10-03 08:50:51,223 INFO L226 Difference]: Without dead ends: 24 [2018-10-03 08:50:51,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:50:51,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-03 08:50:51,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-03 08:50:51,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:50:51,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-03 08:50:51,229 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-03 08:50:51,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:51,229 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-03 08:50:51,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-03 08:50:51,229 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-03 08:50:51,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-03 08:50:51,230 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:51,230 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-10-03 08:50:51,230 INFO L423 AbstractCegarLoop]: === Iteration 22 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:51,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:51,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-10-03 08:50:51,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:51,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:51,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:51,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:51,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:51,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:51,756 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:51,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:51,757 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:51,765 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:50:51,778 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-03 08:50:51,778 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:51,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:51,795 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:51,820 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:51,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-03 08:50:51,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-03 08:50:51,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-03 08:50:51,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:50:51,822 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-10-03 08:50:52,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:52,216 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-03 08:50:52,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-03 08:50:52,219 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-10-03 08:50:52,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:52,219 INFO L225 Difference]: With dead ends: 26 [2018-10-03 08:50:52,219 INFO L226 Difference]: Without dead ends: 25 [2018-10-03 08:50:52,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:50:52,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-03 08:50:52,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-03 08:50:52,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-03 08:50:52,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-03 08:50:52,223 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-03 08:50:52,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:52,224 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-03 08:50:52,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-03 08:50:52,224 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-03 08:50:52,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-03 08:50:52,224 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:52,225 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-10-03 08:50:52,225 INFO L423 AbstractCegarLoop]: === Iteration 23 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:52,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:52,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-10-03 08:50:52,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:52,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:52,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:52,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:52,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:52,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:52,613 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:52,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:52,614 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:52,623 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:50:52,631 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:50:52,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:52,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:52,658 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:52,683 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:52,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-03 08:50:52,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-03 08:50:52,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-03 08:50:52,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:50:52,685 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 25 states. [2018-10-03 08:50:53,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:53,070 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-03 08:50:53,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-03 08:50:53,071 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2018-10-03 08:50:53,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:53,072 INFO L225 Difference]: With dead ends: 27 [2018-10-03 08:50:53,072 INFO L226 Difference]: Without dead ends: 26 [2018-10-03 08:50:53,073 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:50:53,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-03 08:50:53,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-03 08:50:53,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:50:53,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-03 08:50:53,077 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-03 08:50:53,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:53,078 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-03 08:50:53,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-03 08:50:53,078 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-03 08:50:53,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-03 08:50:53,079 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:53,079 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-10-03 08:50:53,079 INFO L423 AbstractCegarLoop]: === Iteration 24 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:53,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:53,079 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-10-03 08:50:53,079 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:53,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:53,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:53,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:53,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:53,506 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:53,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:53,506 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:53,514 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:50:53,525 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-03 08:50:53,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:53,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:53,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:53,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-03 08:50:53,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 08:50:53,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 08:50:53,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:50:53,563 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-10-03 08:50:54,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:54,529 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-03 08:50:54,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-03 08:50:54,529 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-10-03 08:50:54,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:54,530 INFO L225 Difference]: With dead ends: 28 [2018-10-03 08:50:54,530 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 08:50:54,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:50:54,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 08:50:54,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-03 08:50:54,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-03 08:50:54,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-03 08:50:54,535 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-03 08:50:54,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:54,535 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-03 08:50:54,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 08:50:54,535 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-03 08:50:54,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-03 08:50:54,536 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:54,536 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-10-03 08:50:54,536 INFO L423 AbstractCegarLoop]: === Iteration 25 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:54,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:54,536 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-10-03 08:50:54,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:54,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:54,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:54,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:54,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:55,013 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:55,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:55,014 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:55,021 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:50:55,036 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-03 08:50:55,036 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:55,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:55,095 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:55,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:55,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-03 08:50:55,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-03 08:50:55,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-03 08:50:55,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:50:55,116 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 27 states. [2018-10-03 08:50:55,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:55,813 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-03 08:50:55,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-03 08:50:55,813 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2018-10-03 08:50:55,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:55,814 INFO L225 Difference]: With dead ends: 29 [2018-10-03 08:50:55,814 INFO L226 Difference]: Without dead ends: 28 [2018-10-03 08:50:55,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:50:55,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-03 08:50:55,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-03 08:50:55,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:50:55,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-03 08:50:55,820 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-03 08:50:55,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:55,820 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-03 08:50:55,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-03 08:50:55,821 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-03 08:50:55,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-03 08:50:55,821 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:55,821 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-10-03 08:50:55,822 INFO L423 AbstractCegarLoop]: === Iteration 26 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:55,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:55,822 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-10-03 08:50:55,822 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:55,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:55,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:55,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:55,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:55,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:56,353 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:56,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:56,354 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:56,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:50:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:56,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:56,409 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:56,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-03 08:50:56,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-03 08:50:56,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-03 08:50:56,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:50:56,411 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-10-03 08:50:56,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:56,854 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-03 08:50:56,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-03 08:50:56,855 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-10-03 08:50:56,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:56,855 INFO L225 Difference]: With dead ends: 30 [2018-10-03 08:50:56,855 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 08:50:56,856 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:50:56,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 08:50:56,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-03 08:50:56,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-03 08:50:56,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-03 08:50:56,861 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-03 08:50:56,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:56,861 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-03 08:50:56,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-03 08:50:56,861 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-03 08:50:56,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-03 08:50:56,862 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:56,862 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-10-03 08:50:56,862 INFO L423 AbstractCegarLoop]: === Iteration 27 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:56,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:56,862 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-10-03 08:50:56,862 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:56,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:56,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:56,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:50:56,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:57,330 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:57,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:57,331 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:57,338 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:50:57,347 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:50:57,348 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:57,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:57,365 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:57,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:57,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-03 08:50:57,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 08:50:57,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 08:50:57,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:50:57,391 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 29 states. [2018-10-03 08:50:57,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:57,842 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-03 08:50:57,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-03 08:50:57,842 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 28 [2018-10-03 08:50:57,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:57,843 INFO L225 Difference]: With dead ends: 31 [2018-10-03 08:50:57,843 INFO L226 Difference]: Without dead ends: 30 [2018-10-03 08:50:57,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:50:57,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-03 08:50:57,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-03 08:50:57,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:50:57,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-03 08:50:57,848 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-03 08:50:57,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:57,849 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-03 08:50:57,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 08:50:57,849 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-03 08:50:57,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-03 08:50:57,850 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:57,850 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-10-03 08:50:57,850 INFO L423 AbstractCegarLoop]: === Iteration 28 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:57,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:57,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-10-03 08:50:57,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:57,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:57,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:57,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:57,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:58,318 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:58,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:58,318 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:58,327 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:50:58,341 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-03 08:50:58,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:58,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:58,353 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:58,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:58,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-03 08:50:58,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-03 08:50:58,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-03 08:50:58,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:50:58,382 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-10-03 08:50:59,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:59,056 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-03 08:50:59,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-03 08:50:59,056 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-10-03 08:50:59,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:59,057 INFO L225 Difference]: With dead ends: 32 [2018-10-03 08:50:59,057 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 08:50:59,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:50:59,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 08:50:59,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-03 08:50:59,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-03 08:50:59,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-03 08:50:59,063 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-03 08:50:59,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:59,063 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-03 08:50:59,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-03 08:50:59,063 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-03 08:50:59,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-03 08:50:59,064 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:59,064 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-10-03 08:50:59,064 INFO L423 AbstractCegarLoop]: === Iteration 29 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:59,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:59,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-10-03 08:50:59,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:59,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:59,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:59,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:59,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:59,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:00,638 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:00,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:00,638 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:00,646 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:51:00,656 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:51:00,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:00,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:00,707 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:00,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-03 08:51:00,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-03 08:51:00,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-03 08:51:00,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:51:00,709 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 31 states. [2018-10-03 08:51:01,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:01,297 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-03 08:51:01,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-03 08:51:01,298 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2018-10-03 08:51:01,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:01,299 INFO L225 Difference]: With dead ends: 33 [2018-10-03 08:51:01,299 INFO L226 Difference]: Without dead ends: 32 [2018-10-03 08:51:01,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:51:01,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-03 08:51:01,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-03 08:51:01,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:51:01,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-03 08:51:01,308 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-03 08:51:01,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:01,308 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-03 08:51:01,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-03 08:51:01,308 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-03 08:51:01,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-03 08:51:01,309 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:01,309 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-10-03 08:51:01,309 INFO L423 AbstractCegarLoop]: === Iteration 30 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:01,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:01,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-10-03 08:51:01,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:01,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:01,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:01,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:01,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:01,926 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:01,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:01,926 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:01,939 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:51:01,955 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-03 08:51:01,955 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:01,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:01,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:01,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-03 08:51:01,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-03 08:51:01,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-03 08:51:01,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:51:01,998 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-10-03 08:51:02,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:02,627 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-03 08:51:02,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-03 08:51:02,627 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-10-03 08:51:02,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:02,628 INFO L225 Difference]: With dead ends: 34 [2018-10-03 08:51:02,628 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 08:51:02,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:51:02,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 08:51:02,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-03 08:51:02,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-03 08:51:02,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-03 08:51:02,633 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-03 08:51:02,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:02,634 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-03 08:51:02,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-03 08:51:02,634 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-03 08:51:02,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-03 08:51:02,634 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:02,634 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-10-03 08:51:02,634 INFO L423 AbstractCegarLoop]: === Iteration 31 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:02,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:02,635 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-10-03 08:51:02,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:02,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:02,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:02,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:02,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:02,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:03,236 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:03,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:03,237 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:03,246 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:51:03,265 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-03 08:51:03,265 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:03,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:03,338 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:03,364 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:03,364 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-03 08:51:03,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-03 08:51:03,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-03 08:51:03,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:51:03,365 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 33 states. [2018-10-03 08:51:03,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:03,997 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-03 08:51:03,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-03 08:51:03,997 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2018-10-03 08:51:03,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:03,998 INFO L225 Difference]: With dead ends: 35 [2018-10-03 08:51:03,998 INFO L226 Difference]: Without dead ends: 34 [2018-10-03 08:51:03,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:51:03,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-03 08:51:04,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-03 08:51:04,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:51:04,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-03 08:51:04,001 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-03 08:51:04,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:04,002 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-03 08:51:04,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-03 08:51:04,002 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-03 08:51:04,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-03 08:51:04,002 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:04,002 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-10-03 08:51:04,003 INFO L423 AbstractCegarLoop]: === Iteration 32 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:04,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:04,003 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-10-03 08:51:04,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:04,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:04,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:04,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:04,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:04,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:05,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:05,154 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:05,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:51:05,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:05,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:05,188 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:05,209 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:05,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-03 08:51:05,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-03 08:51:05,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-03 08:51:05,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:51:05,211 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-10-03 08:51:06,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:06,202 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-03 08:51:06,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-03 08:51:06,202 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-10-03 08:51:06,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:06,203 INFO L225 Difference]: With dead ends: 36 [2018-10-03 08:51:06,203 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:51:06,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:51:06,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:51:06,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-03 08:51:06,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-03 08:51:06,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-03 08:51:06,209 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-03 08:51:06,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:06,209 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-03 08:51:06,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-03 08:51:06,209 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-03 08:51:06,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-03 08:51:06,210 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:06,210 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-10-03 08:51:06,210 INFO L423 AbstractCegarLoop]: === Iteration 33 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:06,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:06,210 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-10-03 08:51:06,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:06,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:06,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:06,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:51:06,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:06,878 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:06,878 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:06,885 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:51:06,896 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:51:06,897 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:06,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:06,947 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:06,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:06,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-03 08:51:06,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-03 08:51:06,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-03 08:51:06,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:51:06,982 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 35 states. [2018-10-03 08:51:07,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:07,783 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-03 08:51:07,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-03 08:51:07,783 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2018-10-03 08:51:07,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:07,784 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:51:07,784 INFO L226 Difference]: Without dead ends: 36 [2018-10-03 08:51:07,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:51:07,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-03 08:51:07,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-03 08:51:07,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-03 08:51:07,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-03 08:51:07,792 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-03 08:51:07,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:07,792 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-03 08:51:07,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-03 08:51:07,792 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-03 08:51:07,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-03 08:51:07,793 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:07,793 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-10-03 08:51:07,793 INFO L423 AbstractCegarLoop]: === Iteration 34 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:07,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:07,793 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-10-03 08:51:07,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:07,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:07,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:07,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:07,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:07,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:08,511 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:08,511 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:08,511 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:08,518 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:51:08,536 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-03 08:51:08,537 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:08,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:08,551 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:08,574 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:08,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-03 08:51:08,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-03 08:51:08,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-03 08:51:08,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:51:08,575 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-10-03 08:51:09,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:09,308 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-03 08:51:09,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-03 08:51:09,308 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-10-03 08:51:09,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:09,309 INFO L225 Difference]: With dead ends: 38 [2018-10-03 08:51:09,309 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:51:09,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:51:09,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:51:09,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-03 08:51:09,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-03 08:51:09,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-03 08:51:09,314 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-03 08:51:09,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:09,314 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-03 08:51:09,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-03 08:51:09,314 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-03 08:51:09,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-03 08:51:09,315 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:09,315 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-10-03 08:51:09,315 INFO L423 AbstractCegarLoop]: === Iteration 35 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:09,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:09,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-10-03 08:51:09,315 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:09,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:09,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:09,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:09,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:09,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:10,277 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:10,278 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:10,278 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:10,286 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:51:10,294 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:51:10,295 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:10,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:10,337 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:10,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-03 08:51:10,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-03 08:51:10,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-03 08:51:10,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:51:10,338 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 37 states. [2018-10-03 08:51:11,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:11,259 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-03 08:51:11,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-03 08:51:11,260 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 36 [2018-10-03 08:51:11,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:11,260 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:51:11,261 INFO L226 Difference]: Without dead ends: 38 [2018-10-03 08:51:11,261 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:51:11,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-03 08:51:11,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-03 08:51:11,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-03 08:51:11,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-03 08:51:11,265 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-03 08:51:11,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:11,265 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-03 08:51:11,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-03 08:51:11,265 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-03 08:51:11,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-03 08:51:11,266 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:11,266 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-10-03 08:51:11,266 INFO L423 AbstractCegarLoop]: === Iteration 36 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:11,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:11,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-10-03 08:51:11,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:11,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:11,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:11,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:11,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:11,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:12,086 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:12,086 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:12,086 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:12,093 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:51:12,110 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-03 08:51:12,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:12,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:12,121 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:12,141 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:12,142 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-03 08:51:12,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 08:51:12,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 08:51:12,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:51:12,142 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-10-03 08:51:12,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:12,939 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-03 08:51:12,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-03 08:51:12,939 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-10-03 08:51:12,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:12,940 INFO L225 Difference]: With dead ends: 40 [2018-10-03 08:51:12,940 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:51:12,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:51:12,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:51:12,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-03 08:51:12,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-03 08:51:12,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-03 08:51:12,944 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-03 08:51:12,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:12,945 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-03 08:51:12,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 08:51:12,945 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-03 08:51:12,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-03 08:51:12,946 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:12,946 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-10-03 08:51:12,946 INFO L423 AbstractCegarLoop]: === Iteration 37 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:12,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:12,946 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-10-03 08:51:12,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:12,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:12,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:12,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:12,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:14,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:14,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:14,016 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:51:14,035 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-03 08:51:14,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:14,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:14,048 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:14,069 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:14,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-03 08:51:14,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-03 08:51:14,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-03 08:51:14,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:51:14,070 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 39 states. [2018-10-03 08:51:14,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:14,946 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-03 08:51:14,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-03 08:51:14,947 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2018-10-03 08:51:14,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:14,948 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:51:14,948 INFO L226 Difference]: Without dead ends: 40 [2018-10-03 08:51:14,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:51:14,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-03 08:51:14,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-03 08:51:14,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-03 08:51:14,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-03 08:51:14,952 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-03 08:51:14,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:14,953 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-03 08:51:14,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-03 08:51:14,953 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-03 08:51:14,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-03 08:51:14,953 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:14,954 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-10-03 08:51:14,954 INFO L423 AbstractCegarLoop]: === Iteration 38 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:14,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:14,954 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-10-03 08:51:14,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:14,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:14,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:14,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:14,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:16,461 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:16,461 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:16,461 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:16,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:51:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:16,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:16,492 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:16,512 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:16,512 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-03 08:51:16,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-03 08:51:16,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-03 08:51:16,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:51:16,513 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-10-03 08:51:17,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:17,408 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-03 08:51:17,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-03 08:51:17,409 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-10-03 08:51:17,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:17,409 INFO L225 Difference]: With dead ends: 42 [2018-10-03 08:51:17,409 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:51:17,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:51:17,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:51:17,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-03 08:51:17,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-03 08:51:17,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-03 08:51:17,414 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-03 08:51:17,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:17,414 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-03 08:51:17,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-03 08:51:17,415 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-03 08:51:17,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-03 08:51:17,415 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:17,415 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-10-03 08:51:17,415 INFO L423 AbstractCegarLoop]: === Iteration 39 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:17,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:17,416 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-10-03 08:51:17,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:17,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:17,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:17,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:51:17,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:18,895 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:18,895 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:18,903 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:51:18,916 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:51:18,916 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:18,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:18,928 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:18,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:18,947 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-03 08:51:18,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-03 08:51:18,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-03 08:51:18,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:51:18,948 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 41 states. [2018-10-03 08:51:19,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:19,892 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-03 08:51:19,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-03 08:51:19,893 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 40 [2018-10-03 08:51:19,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:19,893 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:51:19,893 INFO L226 Difference]: Without dead ends: 42 [2018-10-03 08:51:19,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:51:19,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-03 08:51:19,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-03 08:51:19,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-03 08:51:19,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-03 08:51:19,897 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-03 08:51:19,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:19,898 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-03 08:51:19,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-03 08:51:19,898 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-03 08:51:19,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-03 08:51:19,898 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:19,899 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-10-03 08:51:19,899 INFO L423 AbstractCegarLoop]: === Iteration 40 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:19,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:19,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-10-03 08:51:19,899 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:19,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:19,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:19,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:19,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:20,814 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:20,814 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:20,821 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:51:20,841 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-03 08:51:20,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:20,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:20,853 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:20,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:20,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-03 08:51:20,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-03 08:51:20,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-03 08:51:20,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:51:20,874 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-10-03 08:51:22,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:22,017 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-03 08:51:22,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-03 08:51:22,018 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-10-03 08:51:22,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:22,018 INFO L225 Difference]: With dead ends: 44 [2018-10-03 08:51:22,018 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:51:22,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:51:22,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:51:22,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-03 08:51:22,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-03 08:51:22,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-03 08:51:22,023 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-03 08:51:22,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:22,023 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-03 08:51:22,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-03 08:51:22,023 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-03 08:51:22,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-03 08:51:22,023 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:22,024 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-10-03 08:51:22,024 INFO L423 AbstractCegarLoop]: === Iteration 41 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:22,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:22,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-10-03 08:51:22,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:22,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:22,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:22,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:22,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:22,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:22,977 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:22,977 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:22,978 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:22,985 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:51:22,998 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:51:22,998 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:22,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:23,008 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:23,028 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:23,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-03 08:51:23,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-03 08:51:23,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-03 08:51:23,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:51:23,029 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 43 states. [2018-10-03 08:51:24,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:24,067 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-03 08:51:24,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-03 08:51:24,068 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2018-10-03 08:51:24,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:24,068 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:51:24,069 INFO L226 Difference]: Without dead ends: 44 [2018-10-03 08:51:24,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:51:24,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-03 08:51:24,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-03 08:51:24,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-03 08:51:24,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-03 08:51:24,073 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-03 08:51:24,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:24,073 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-03 08:51:24,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-03 08:51:24,074 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-03 08:51:24,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-03 08:51:24,074 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:24,074 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-10-03 08:51:24,074 INFO L423 AbstractCegarLoop]: === Iteration 42 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:24,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:24,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-10-03 08:51:24,075 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:24,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:24,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:24,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:24,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:24,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:25,081 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:25,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:25,081 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:25,090 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:51:25,114 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-03 08:51:25,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:25,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:25,128 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:25,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:25,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-03 08:51:25,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-03 08:51:25,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-03 08:51:25,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:51:25,150 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-10-03 08:51:26,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:26,391 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-03 08:51:26,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 08:51:26,391 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-10-03 08:51:26,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:26,391 INFO L225 Difference]: With dead ends: 46 [2018-10-03 08:51:26,392 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:51:26,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:51:26,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:51:26,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-03 08:51:26,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-03 08:51:26,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-03 08:51:26,395 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-03 08:51:26,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:26,395 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-03 08:51:26,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-03 08:51:26,395 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-03 08:51:26,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-03 08:51:26,395 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:26,395 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-10-03 08:51:26,396 INFO L423 AbstractCegarLoop]: === Iteration 43 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:26,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:26,396 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-10-03 08:51:26,396 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:26,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:26,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:26,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:26,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:27,541 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:27,541 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:27,541 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:27,548 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:51:27,568 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-03 08:51:27,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:27,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:27,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:27,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-03 08:51:27,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-03 08:51:27,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-03 08:51:27,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:51:27,604 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 45 states. [2018-10-03 08:51:28,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:28,790 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-03 08:51:28,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-03 08:51:28,790 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 44 [2018-10-03 08:51:28,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:28,791 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:51:28,791 INFO L226 Difference]: Without dead ends: 46 [2018-10-03 08:51:28,793 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:51:28,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-03 08:51:28,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-03 08:51:28,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-03 08:51:28,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-03 08:51:28,796 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-03 08:51:28,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:28,796 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-03 08:51:28,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-03 08:51:28,797 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-03 08:51:28,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-03 08:51:28,797 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:28,797 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-10-03 08:51:28,797 INFO L423 AbstractCegarLoop]: === Iteration 44 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:28,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:28,798 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-10-03 08:51:28,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:28,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:28,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:28,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:28,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:30,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:30,159 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:30,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:51:30,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:30,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:30,220 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:30,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-03 08:51:30,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-03 08:51:30,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-03 08:51:30,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:51:30,222 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-10-03 08:51:31,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:31,631 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-03 08:51:31,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-03 08:51:31,632 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-10-03 08:51:31,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:31,632 INFO L225 Difference]: With dead ends: 48 [2018-10-03 08:51:31,633 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:51:31,633 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:51:31,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:51:31,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-03 08:51:31,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-03 08:51:31,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-03 08:51:31,637 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-03 08:51:31,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:31,637 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-03 08:51:31,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-03 08:51:31,637 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-03 08:51:31,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-03 08:51:31,637 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:31,638 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1] [2018-10-03 08:51:31,638 INFO L423 AbstractCegarLoop]: === Iteration 45 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:31,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:31,638 INFO L82 PathProgramCache]: Analyzing trace with hash 667835207, now seen corresponding path program 44 times [2018-10-03 08:51:31,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:31,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:31,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:31,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:51:31,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:31,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:32,703 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:32,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:32,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:32,711 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:51:32,726 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:51:32,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:32,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:32,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:32,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-03 08:51:32,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 08:51:32,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 08:51:32,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:51:32,760 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 47 states. [2018-10-03 08:51:34,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:34,008 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-03 08:51:34,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-03 08:51:34,009 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 46 [2018-10-03 08:51:34,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:34,010 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:51:34,010 INFO L226 Difference]: Without dead ends: 48 [2018-10-03 08:51:34,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:51:34,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-03 08:51:34,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-03 08:51:34,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-03 08:51:34,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-03 08:51:34,013 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-03 08:51:34,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:34,014 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-03 08:51:34,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 08:51:34,014 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-03 08:51:34,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-03 08:51:34,014 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:34,014 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1] [2018-10-03 08:51:34,015 INFO L423 AbstractCegarLoop]: === Iteration 46 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:34,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:34,015 INFO L82 PathProgramCache]: Analyzing trace with hash -771945119, now seen corresponding path program 45 times [2018-10-03 08:51:34,015 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:34,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:34,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:34,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:34,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:34,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:35,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:35,232 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:35,244 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:51:35,268 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-03 08:51:35,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:35,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:35,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:35,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:35,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-03 08:51:35,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-03 08:51:35,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-03 08:51:35,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:51:35,326 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-10-03 08:51:36,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:36,814 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-03 08:51:36,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-03 08:51:36,815 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-10-03 08:51:36,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:36,816 INFO L225 Difference]: With dead ends: 50 [2018-10-03 08:51:36,816 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:51:36,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:51:36,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:51:36,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-03 08:51:36,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-03 08:51:36,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-03 08:51:36,820 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-03 08:51:36,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:36,820 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-03 08:51:36,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-03 08:51:36,820 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-03 08:51:36,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-03 08:51:36,821 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:36,821 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1] [2018-10-03 08:51:36,821 INFO L423 AbstractCegarLoop]: === Iteration 47 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:36,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:36,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505031, now seen corresponding path program 46 times [2018-10-03 08:51:36,822 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:36,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:36,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:36,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:36,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:36,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:37,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:37,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:37,974 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:37,981 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:51:37,996 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:51:37,996 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:37,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:38,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:38,031 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:38,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-03 08:51:38,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-03 08:51:38,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-03 08:51:38,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:51:38,032 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 49 states. [2018-10-03 08:51:39,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:39,373 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-03 08:51:39,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-03 08:51:39,374 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 48 [2018-10-03 08:51:39,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:39,374 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:51:39,375 INFO L226 Difference]: Without dead ends: 50 [2018-10-03 08:51:39,375 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:51:39,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-03 08:51:39,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-03 08:51:39,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-03 08:51:39,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-03 08:51:39,379 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-03 08:51:39,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:39,379 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-03 08:51:39,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-03 08:51:39,379 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-03 08:51:39,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-03 08:51:39,379 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:39,380 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1] [2018-10-03 08:51:39,380 INFO L423 AbstractCegarLoop]: === Iteration 48 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:39,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:39,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081057, now seen corresponding path program 47 times [2018-10-03 08:51:39,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:39,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:39,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:39,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:39,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:40,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:40,572 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:40,572 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:40,580 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:51:40,604 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-03 08:51:40,604 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:40,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:40,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:40,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-03 08:51:40,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-03 08:51:40,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-03 08:51:40,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:51:40,651 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-10-03 08:51:42,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:42,390 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-03 08:51:42,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-03 08:51:42,391 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-10-03 08:51:42,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:42,392 INFO L225 Difference]: With dead ends: 52 [2018-10-03 08:51:42,392 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:51:42,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:51:42,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:51:42,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-03 08:51:42,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-03 08:51:42,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-03 08:51:42,395 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-03 08:51:42,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:42,395 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-03 08:51:42,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-03 08:51:42,396 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-03 08:51:42,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-03 08:51:42,396 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:42,396 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1] [2018-10-03 08:51:42,396 INFO L423 AbstractCegarLoop]: === Iteration 49 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:42,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:42,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192953, now seen corresponding path program 48 times [2018-10-03 08:51:42,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:42,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:42,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:42,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:42,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:42,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:43,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:43,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:43,745 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:43,752 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:51:43,775 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-03 08:51:43,776 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:43,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:43,807 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:43,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-03 08:51:43,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-03 08:51:43,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-03 08:51:43,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:51:43,809 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 51 states. [2018-10-03 08:51:45,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:45,301 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-03 08:51:45,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-03 08:51:45,310 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 50 [2018-10-03 08:51:45,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:45,310 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:51:45,310 INFO L226 Difference]: Without dead ends: 52 [2018-10-03 08:51:45,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:51:45,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-03 08:51:45,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-03 08:51:45,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-03 08:51:45,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-03 08:51:45,315 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-03 08:51:45,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:45,315 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-03 08:51:45,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-03 08:51:45,315 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-03 08:51:45,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-03 08:51:45,315 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:45,316 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1] [2018-10-03 08:51:45,316 INFO L423 AbstractCegarLoop]: === Iteration 50 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:45,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:45,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593249, now seen corresponding path program 49 times [2018-10-03 08:51:45,317 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:45,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:45,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:45,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:45,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:46,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:46,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:46,567 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:46,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:51:46,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:46,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:46,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:46,657 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:46,658 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-03 08:51:46,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-03 08:51:46,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-03 08:51:46,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:51:46,659 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-10-03 08:51:48,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:48,359 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-03 08:51:48,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-03 08:51:48,359 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-10-03 08:51:48,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:48,360 INFO L225 Difference]: With dead ends: 54 [2018-10-03 08:51:48,360 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:51:48,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:51:48,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:51:48,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-03 08:51:48,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-03 08:51:48,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-03 08:51:48,366 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-03 08:51:48,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:48,366 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-03 08:51:48,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-03 08:51:48,366 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-03 08:51:48,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-03 08:51:48,367 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:48,367 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1] [2018-10-03 08:51:48,367 INFO L423 AbstractCegarLoop]: === Iteration 51 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:48,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:48,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1250315001, now seen corresponding path program 50 times [2018-10-03 08:51:48,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:48,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:48,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:48,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:51:48,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:48,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:50,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:50,351 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:50,361 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:51:50,377 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:51:50,377 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:50,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:50,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:50,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:50,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-03 08:51:50,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-03 08:51:50,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-03 08:51:50,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:51:50,411 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 53 states. [2018-10-03 08:51:52,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:52,221 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-03 08:51:52,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-03 08:51:52,221 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 52 [2018-10-03 08:51:52,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:52,222 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:51:52,223 INFO L226 Difference]: Without dead ends: 54 [2018-10-03 08:51:52,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:51:52,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-03 08:51:52,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-03 08:51:52,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-03 08:51:52,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-03 08:51:52,228 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-03 08:51:52,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:52,228 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-03 08:51:52,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-03 08:51:52,228 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-03 08:51:52,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-03 08:51:52,228 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:52,229 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1] [2018-10-03 08:51:52,229 INFO L423 AbstractCegarLoop]: === Iteration 52 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:52,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:52,229 INFO L82 PathProgramCache]: Analyzing trace with hash -105059423, now seen corresponding path program 51 times [2018-10-03 08:51:52,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:52,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:52,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:52,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:52,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:54,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:54,486 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:54,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:54,493 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:51:54,518 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-03 08:51:54,518 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:54,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:54,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:54,551 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:54,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-03 08:51:54,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-03 08:51:54,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-03 08:51:54,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:51:54,553 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-10-03 08:51:56,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:56,234 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-03 08:51:56,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-03 08:51:56,234 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-10-03 08:51:56,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:56,235 INFO L225 Difference]: With dead ends: 56 [2018-10-03 08:51:56,235 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:51:56,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:51:56,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:51:56,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-03 08:51:56,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-03 08:51:56,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-03 08:51:56,239 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-03 08:51:56,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:56,239 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-03 08:51:56,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-03 08:51:56,240 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-03 08:51:56,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-03 08:51:56,240 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:56,240 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1] [2018-10-03 08:51:56,240 INFO L423 AbstractCegarLoop]: === Iteration 53 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:56,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:56,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125127, now seen corresponding path program 52 times [2018-10-03 08:51:56,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:56,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:56,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:56,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:56,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:56,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:58,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:58,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:58,343 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:51:58,360 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:51:58,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:58,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:58,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:58,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:58,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-03 08:51:58,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-03 08:51:58,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-03 08:51:58,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 08:51:58,394 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 55 states. [2018-10-03 08:52:00,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:52:00,102 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-03 08:52:00,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-03 08:52:00,102 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 54 [2018-10-03 08:52:00,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:52:00,103 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:52:00,103 INFO L226 Difference]: Without dead ends: 56 [2018-10-03 08:52:00,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 08:52:00,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-03 08:52:00,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-03 08:52:00,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-03 08:52:00,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-03 08:52:00,109 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-03 08:52:00,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:52:00,109 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-03 08:52:00,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-03 08:52:00,109 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-03 08:52:00,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-03 08:52:00,110 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:52:00,110 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1] [2018-10-03 08:52:00,110 INFO L423 AbstractCegarLoop]: === Iteration 54 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:52:00,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:52:00,110 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107809, now seen corresponding path program 53 times [2018-10-03 08:52:00,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:52:00,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:52:00,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:00,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:52:00,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:00,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:01,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:01,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:52:01,614 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:52:01,626 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:52:01,659 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-03 08:52:01,659 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:52:01,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:52:01,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:01,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:52:01,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-03 08:52:01,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-03 08:52:01,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-03 08:52:01,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 08:52:01,700 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-10-03 08:52:03,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:52:03,702 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-03 08:52:03,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-03 08:52:03,703 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-10-03 08:52:03,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:52:03,704 INFO L225 Difference]: With dead ends: 58 [2018-10-03 08:52:03,704 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 08:52:03,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 08:52:03,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 08:52:03,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-03 08:52:03,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-03 08:52:03,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-03 08:52:03,709 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-03 08:52:03,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:52:03,709 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-03 08:52:03,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-03 08:52:03,710 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-03 08:52:03,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-03 08:52:03,710 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:52:03,710 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1] [2018-10-03 08:52:03,710 INFO L423 AbstractCegarLoop]: === Iteration 55 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:52:03,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:52:03,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832583, now seen corresponding path program 54 times [2018-10-03 08:52:03,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:52:03,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:52:03,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:03,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:52:03,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:03,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:05,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:52:05,210 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:52:05,218 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:52:05,247 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-03 08:52:05,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:52:05,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:52:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:05,280 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:52:05,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-03 08:52:05,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-03 08:52:05,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-03 08:52:05,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 08:52:05,281 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 57 states. [2018-10-03 08:52:07,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:52:07,112 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-03 08:52:07,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-03 08:52:07,112 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 56 [2018-10-03 08:52:07,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:52:07,113 INFO L225 Difference]: With dead ends: 59 [2018-10-03 08:52:07,113 INFO L226 Difference]: Without dead ends: 58 [2018-10-03 08:52:07,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 08:52:07,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-03 08:52:07,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-03 08:52:07,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-03 08:52:07,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-03 08:52:07,116 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-03 08:52:07,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:52:07,116 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-03 08:52:07,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-03 08:52:07,117 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-03 08:52:07,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-03 08:52:07,117 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:52:07,117 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1] [2018-10-03 08:52:07,117 INFO L423 AbstractCegarLoop]: === Iteration 56 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:52:07,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:52:07,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895647, now seen corresponding path program 55 times [2018-10-03 08:52:07,117 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:52:07,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:52:07,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:07,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:52:07,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:07,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:08,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:52:08,763 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:52:08,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:52:08,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:08,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:52:08,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:08,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:52:08,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-03 08:52:08,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-03 08:52:08,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-03 08:52:08,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 08:52:08,827 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-10-03 08:52:10,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:52:10,722 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-03 08:52:10,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-03 08:52:10,723 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-10-03 08:52:10,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:52:10,723 INFO L225 Difference]: With dead ends: 60 [2018-10-03 08:52:10,724 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:52:10,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 08:52:10,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:52:10,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-03 08:52:10,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-03 08:52:10,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-03 08:52:10,728 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-03 08:52:10,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:52:10,729 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-03 08:52:10,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-03 08:52:10,729 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-03 08:52:10,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-03 08:52:10,729 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:52:10,729 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1] [2018-10-03 08:52:10,729 INFO L423 AbstractCegarLoop]: === Iteration 57 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:52:10,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:52:10,730 INFO L82 PathProgramCache]: Analyzing trace with hash -836059449, now seen corresponding path program 56 times [2018-10-03 08:52:10,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:52:10,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:52:10,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:10,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:52:10,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:12,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:12,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:52:12,691 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:52:12,698 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:52:12,716 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:52:12,716 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:52:12,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:52:12,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:12,749 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:52:12,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-03 08:52:12,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-03 08:52:12,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-03 08:52:12,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 08:52:12,750 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 59 states. [2018-10-03 08:52:14,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:52:14,733 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-03 08:52:14,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-03 08:52:14,734 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 58 [2018-10-03 08:52:14,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:52:14,734 INFO L225 Difference]: With dead ends: 61 [2018-10-03 08:52:14,735 INFO L226 Difference]: Without dead ends: 60 [2018-10-03 08:52:14,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 08:52:14,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-03 08:52:14,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-03 08:52:14,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-03 08:52:14,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-03 08:52:14,739 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-03 08:52:14,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:52:14,740 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-03 08:52:14,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-03 08:52:14,740 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-03 08:52:14,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-03 08:52:14,740 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:52:14,740 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1] [2018-10-03 08:52:14,741 INFO L423 AbstractCegarLoop]: === Iteration 58 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:52:14,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:52:14,741 INFO L82 PathProgramCache]: Analyzing trace with hash -148039199, now seen corresponding path program 57 times [2018-10-03 08:52:14,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:52:14,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:52:14,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:14,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:52:14,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:14,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:16,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:16,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:52:16,384 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:52:16,391 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:52:16,427 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-03 08:52:16,427 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:52:16,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:52:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:16,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:52:16,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-03 08:52:16,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-03 08:52:16,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-03 08:52:16,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-10-03 08:52:16,464 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-10-03 08:52:18,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:52:18,670 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-03 08:52:18,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-03 08:52:18,671 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-10-03 08:52:18,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:52:18,671 INFO L225 Difference]: With dead ends: 62 [2018-10-03 08:52:18,671 INFO L226 Difference]: Without dead ends: 61 [2018-10-03 08:52:18,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-10-03 08:52:18,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-03 08:52:18,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-03 08:52:18,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-03 08:52:18,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-03 08:52:18,676 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-03 08:52:18,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:52:18,677 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-03 08:52:18,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-03 08:52:18,677 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-03 08:52:18,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-03 08:52:18,677 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:52:18,678 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1] [2018-10-03 08:52:18,678 INFO L423 AbstractCegarLoop]: === Iteration 59 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:52:18,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:52:18,678 INFO L82 PathProgramCache]: Analyzing trace with hash -294247929, now seen corresponding path program 58 times [2018-10-03 08:52:18,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:52:18,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:52:18,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:18,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:52:18,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:20,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:20,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:52:20,605 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:52:20,614 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:52:20,629 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:52:20,630 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:52:20,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:52:20,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:20,667 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:52:20,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-03 08:52:20,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-03 08:52:20,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-03 08:52:20,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-10-03 08:52:20,669 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 61 states. [2018-10-03 08:52:22,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:52:22,992 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-03 08:52:22,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-03 08:52:22,993 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 60 [2018-10-03 08:52:22,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:52:22,994 INFO L225 Difference]: With dead ends: 63 [2018-10-03 08:52:22,994 INFO L226 Difference]: Without dead ends: 62 [2018-10-03 08:52:22,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-10-03 08:52:22,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-03 08:52:22,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-03 08:52:22,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-03 08:52:22,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-03 08:52:22,999 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-10-03 08:52:22,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:52:22,999 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-03 08:52:22,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-03 08:52:22,999 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-03 08:52:22,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-03 08:52:23,000 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:52:23,000 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1] [2018-10-03 08:52:23,000 INFO L423 AbstractCegarLoop]: === Iteration 60 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:52:23,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:52:23,000 INFO L82 PathProgramCache]: Analyzing trace with hash -531751263, now seen corresponding path program 59 times [2018-10-03 08:52:23,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:52:23,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:52:23,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:23,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:52:23,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:24,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:52:24,950 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:52:24,958 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:52:24,987 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-03 08:52:24,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:52:24,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:52:25,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:25,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:52:25,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-03 08:52:25,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-03 08:52:25,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-03 08:52:25,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 08:52:25,026 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-10-03 08:52:27,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:52:27,174 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-03 08:52:27,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-03 08:52:27,174 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-10-03 08:52:27,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:52:27,175 INFO L225 Difference]: With dead ends: 64 [2018-10-03 08:52:27,175 INFO L226 Difference]: Without dead ends: 63 [2018-10-03 08:52:27,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 08:52:27,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-03 08:52:27,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-03 08:52:27,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-03 08:52:27,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-03 08:52:27,179 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-10-03 08:52:27,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:52:27,180 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-03 08:52:27,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-03 08:52:27,180 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-03 08:52:27,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-03 08:52:27,180 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:52:27,180 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1] [2018-10-03 08:52:27,180 INFO L423 AbstractCegarLoop]: === Iteration 61 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:52:27,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:52:27,181 INFO L82 PathProgramCache]: Analyzing trace with hash 695579975, now seen corresponding path program 60 times [2018-10-03 08:52:27,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:52:27,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:52:27,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:27,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:52:27,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:27,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:29,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:52:29,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:52:29,413 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:52:29,448 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-03 08:52:29,448 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:52:29,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:52:29,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:29,506 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:52:29,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-03 08:52:29,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-03 08:52:29,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-03 08:52:29,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-10-03 08:52:29,507 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 63 states. [2018-10-03 08:52:32,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:52:32,291 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-03 08:52:32,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-03 08:52:32,291 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 62 [2018-10-03 08:52:32,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:52:32,292 INFO L225 Difference]: With dead ends: 65 [2018-10-03 08:52:32,292 INFO L226 Difference]: Without dead ends: 64 [2018-10-03 08:52:32,293 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-10-03 08:52:32,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-03 08:52:32,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-03 08:52:32,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-03 08:52:32,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-03 08:52:32,296 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-10-03 08:52:32,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:52:32,296 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-03 08:52:32,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-03 08:52:32,296 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-03 08:52:32,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-03 08:52:32,297 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:52:32,297 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1] [2018-10-03 08:52:32,297 INFO L423 AbstractCegarLoop]: === Iteration 62 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:52:32,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:52:32,297 INFO L82 PathProgramCache]: Analyzing trace with hash 88142689, now seen corresponding path program 61 times [2018-10-03 08:52:32,297 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:52:32,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:52:32,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:32,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:52:32,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:32,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:34,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:34,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:52:34,494 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:52:34,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:52:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:34,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:52:34,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:34,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:52:34,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-03 08:52:34,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-03 08:52:34,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-03 08:52:34,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-10-03 08:52:34,572 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-10-03 08:52:36,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:52:36,959 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-10-03 08:52:36,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-03 08:52:36,959 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-10-03 08:52:36,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:52:36,960 INFO L225 Difference]: With dead ends: 66 [2018-10-03 08:52:36,960 INFO L226 Difference]: Without dead ends: 65 [2018-10-03 08:52:36,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-10-03 08:52:36,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-03 08:52:36,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-03 08:52:36,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-03 08:52:36,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-03 08:52:36,965 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-10-03 08:52:36,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:52:36,965 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-03 08:52:36,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-03 08:52:36,965 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-03 08:52:36,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-03 08:52:36,965 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:52:36,965 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1] [2018-10-03 08:52:36,966 INFO L423 AbstractCegarLoop]: === Iteration 63 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:52:36,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:52:36,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543993, now seen corresponding path program 62 times [2018-10-03 08:52:36,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:52:36,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:52:36,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:36,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:52:36,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:36,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:39,220 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:52:39,220 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:52:39,230 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:52:39,255 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:52:39,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:52:39,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:52:39,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:39,306 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:52:39,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-03 08:52:39,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-03 08:52:39,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-03 08:52:39,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-10-03 08:52:39,308 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 65 states. [2018-10-03 08:52:41,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:52:41,704 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-03 08:52:41,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-03 08:52:41,705 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 64 [2018-10-03 08:52:41,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:52:41,705 INFO L225 Difference]: With dead ends: 67 [2018-10-03 08:52:41,706 INFO L226 Difference]: Without dead ends: 66 [2018-10-03 08:52:41,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-10-03 08:52:41,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-03 08:52:41,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-03 08:52:41,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-03 08:52:41,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-03 08:52:41,711 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-10-03 08:52:41,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:52:41,712 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-03 08:52:41,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-03 08:52:41,712 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-03 08:52:41,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-03 08:52:41,712 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:52:41,712 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1] [2018-10-03 08:52:41,713 INFO L423 AbstractCegarLoop]: === Iteration 64 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:52:41,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:52:41,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223583, now seen corresponding path program 63 times [2018-10-03 08:52:41,713 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:52:41,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:52:41,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:41,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:52:41,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:43,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:43,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:52:43,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:52:43,913 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:52:43,945 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-03 08:52:43,945 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:52:43,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:52:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:44,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:52:44,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-03 08:52:44,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-03 08:52:44,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-03 08:52:44,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-10-03 08:52:44,005 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-10-03 08:52:46,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:52:46,778 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-10-03 08:52:46,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-03 08:52:46,779 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-10-03 08:52:46,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:52:46,779 INFO L225 Difference]: With dead ends: 68 [2018-10-03 08:52:46,780 INFO L226 Difference]: Without dead ends: 67 [2018-10-03 08:52:46,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-10-03 08:52:46,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-03 08:52:46,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-03 08:52:46,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-03 08:52:46,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-03 08:52:46,784 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-10-03 08:52:46,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:52:46,785 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-03 08:52:46,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-03 08:52:46,785 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-03 08:52:46,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-03 08:52:46,785 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:52:46,785 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1] [2018-10-03 08:52:46,786 INFO L423 AbstractCegarLoop]: === Iteration 65 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:52:46,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:52:46,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774535, now seen corresponding path program 64 times [2018-10-03 08:52:46,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:52:46,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:52:46,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:46,787 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:52:46,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:49,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:49,145 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:52:49,145 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:52:49,153 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:52:49,172 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:52:49,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:52:49,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:52:49,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:49,220 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:52:49,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-03 08:52:49,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-03 08:52:49,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-03 08:52:49,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-10-03 08:52:49,222 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 67 states. [2018-10-03 08:52:51,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:52:51,836 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-03 08:52:51,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-03 08:52:51,836 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 66 [2018-10-03 08:52:51,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:52:51,837 INFO L225 Difference]: With dead ends: 69 [2018-10-03 08:52:51,837 INFO L226 Difference]: Without dead ends: 68 [2018-10-03 08:52:51,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-10-03 08:52:51,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-03 08:52:51,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-03 08:52:51,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-03 08:52:51,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-03 08:52:51,842 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-10-03 08:52:51,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:52:51,842 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-03 08:52:51,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-03 08:52:51,842 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-03 08:52:51,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-03 08:52:51,843 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:52:51,843 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1] [2018-10-03 08:52:51,843 INFO L423 AbstractCegarLoop]: === Iteration 66 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:52:51,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:52:51,844 INFO L82 PathProgramCache]: Analyzing trace with hash -892597023, now seen corresponding path program 65 times [2018-10-03 08:52:51,844 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:52:51,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:52:51,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:51,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:52:51,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:54,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:54,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:52:54,214 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:52:54,221 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:52:54,255 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-03 08:52:54,255 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:52:54,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:52:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:54,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:52:54,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-03 08:52:54,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-03 08:52:54,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-03 08:52:54,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-10-03 08:52:54,295 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-10-03 08:52:56,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:52:56,911 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-03 08:52:56,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-03 08:52:56,912 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-10-03 08:52:56,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:52:56,912 INFO L225 Difference]: With dead ends: 70 [2018-10-03 08:52:56,912 INFO L226 Difference]: Without dead ends: 69 [2018-10-03 08:52:56,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-10-03 08:52:56,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-03 08:52:56,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-03 08:52:56,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-03 08:52:56,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-03 08:52:56,917 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-10-03 08:52:56,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:52:56,917 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-03 08:52:56,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-03 08:52:56,917 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-03 08:52:56,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-03 08:52:56,917 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:52:56,917 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1] [2018-10-03 08:52:56,918 INFO L423 AbstractCegarLoop]: === Iteration 67 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:52:56,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:52:56,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703993, now seen corresponding path program 66 times [2018-10-03 08:52:56,918 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:52:56,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:52:56,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:56,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:52:56,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:59,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:52:59,611 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:52:59,619 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:52:59,652 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-10-03 08:52:59,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:52:59,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:52:59,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:59,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:52:59,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-03 08:52:59,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-03 08:52:59,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-03 08:52:59,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-10-03 08:52:59,699 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 69 states. [2018-10-03 08:53:02,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:02,399 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-03 08:53:02,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-03 08:53:02,400 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 68 [2018-10-03 08:53:02,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:02,400 INFO L225 Difference]: With dead ends: 71 [2018-10-03 08:53:02,401 INFO L226 Difference]: Without dead ends: 70 [2018-10-03 08:53:02,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-10-03 08:53:02,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-03 08:53:02,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-03 08:53:02,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-03 08:53:02,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-03 08:53:02,406 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-10-03 08:53:02,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:02,407 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-03 08:53:02,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-03 08:53:02,407 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-03 08:53:02,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-03 08:53:02,407 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:02,408 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1] [2018-10-03 08:53:02,408 INFO L423 AbstractCegarLoop]: === Iteration 68 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:02,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:02,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718305, now seen corresponding path program 67 times [2018-10-03 08:53:02,408 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:02,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:02,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:02,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:02,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:02,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:05,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:05,005 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:05,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:05,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:05,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:05,070 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:05,070 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-03 08:53:05,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-03 08:53:05,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-03 08:53:05,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-10-03 08:53:05,071 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-10-03 08:53:07,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:07,950 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-10-03 08:53:07,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-03 08:53:07,951 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-10-03 08:53:07,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:07,952 INFO L225 Difference]: With dead ends: 72 [2018-10-03 08:53:07,952 INFO L226 Difference]: Without dead ends: 71 [2018-10-03 08:53:07,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-10-03 08:53:07,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-03 08:53:07,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-03 08:53:07,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-03 08:53:07,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-03 08:53:07,956 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-10-03 08:53:07,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:07,956 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-03 08:53:07,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-03 08:53:07,956 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-03 08:53:07,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-03 08:53:07,957 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:07,957 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1] [2018-10-03 08:53:07,957 INFO L423 AbstractCegarLoop]: === Iteration 69 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:07,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:07,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438265, now seen corresponding path program 68 times [2018-10-03 08:53:07,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:07,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:07,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:07,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:07,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:07,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:10,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:10,537 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:10,543 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:53:10,565 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:53:10,565 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:10,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:10,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:10,603 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:10,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-03 08:53:10,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-03 08:53:10,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-03 08:53:10,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-10-03 08:53:10,604 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 71 states. [2018-10-03 08:53:13,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:13,544 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-03 08:53:13,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-03 08:53:13,545 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 70 [2018-10-03 08:53:13,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:13,546 INFO L225 Difference]: With dead ends: 73 [2018-10-03 08:53:13,546 INFO L226 Difference]: Without dead ends: 72 [2018-10-03 08:53:13,546 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-10-03 08:53:13,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-03 08:53:13,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-03 08:53:13,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-03 08:53:13,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-03 08:53:13,550 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-10-03 08:53:13,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:13,550 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-03 08:53:13,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-03 08:53:13,550 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-03 08:53:13,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-03 08:53:13,550 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:13,550 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1] [2018-10-03 08:53:13,551 INFO L423 AbstractCegarLoop]: === Iteration 70 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:13,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:13,551 INFO L82 PathProgramCache]: Analyzing trace with hash 976119393, now seen corresponding path program 69 times [2018-10-03 08:53:13,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:13,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:13,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:13,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:13,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:13,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:16,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:16,062 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:16,063 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:16,075 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:53:16,112 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-03 08:53:16,112 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:16,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:16,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:16,150 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:16,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-03 08:53:16,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-03 08:53:16,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-03 08:53:16,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-10-03 08:53:16,151 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-10-03 08:53:19,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:19,233 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-03 08:53:19,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-03 08:53:19,233 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-10-03 08:53:19,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:19,234 INFO L225 Difference]: With dead ends: 74 [2018-10-03 08:53:19,234 INFO L226 Difference]: Without dead ends: 73 [2018-10-03 08:53:19,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-10-03 08:53:19,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-03 08:53:19,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-03 08:53:19,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-03 08:53:19,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-03 08:53:19,239 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-10-03 08:53:19,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:19,240 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-03 08:53:19,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-03 08:53:19,240 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-03 08:53:19,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-03 08:53:19,240 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:19,240 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1] [2018-10-03 08:53:19,241 INFO L423 AbstractCegarLoop]: === Iteration 71 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:19,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:19,241 INFO L82 PathProgramCache]: Analyzing trace with hash 194930055, now seen corresponding path program 70 times [2018-10-03 08:53:19,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:19,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:19,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:19,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:19,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:19,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:21,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:21,710 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:21,718 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:53:21,743 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:53:21,743 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:21,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:21,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:21,789 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:21,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-03 08:53:21,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-03 08:53:21,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-03 08:53:21,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-10-03 08:53:21,790 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 73 states. [2018-10-03 08:53:25,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:25,751 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-03 08:53:25,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-03 08:53:25,751 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 72 [2018-10-03 08:53:25,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:25,752 INFO L225 Difference]: With dead ends: 75 [2018-10-03 08:53:25,752 INFO L226 Difference]: Without dead ends: 74 [2018-10-03 08:53:25,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-10-03 08:53:25,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-03 08:53:25,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-03 08:53:25,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-03 08:53:25,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-03 08:53:25,758 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-10-03 08:53:25,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:25,758 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-03 08:53:25,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-03 08:53:25,759 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-03 08:53:25,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-03 08:53:25,759 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:25,759 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1] [2018-10-03 08:53:25,759 INFO L423 AbstractCegarLoop]: === Iteration 72 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:25,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:25,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864353, now seen corresponding path program 71 times [2018-10-03 08:53:25,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:25,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:25,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:25,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:25,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:25,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:28,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:28,215 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:28,215 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:28,222 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:53:28,356 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-03 08:53:28,356 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:28,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:28,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:28,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-03 08:53:28,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-03 08:53:28,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-03 08:53:28,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-10-03 08:53:28,418 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-10-03 08:53:31,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:31,816 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-03 08:53:31,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-03 08:53:31,816 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-10-03 08:53:31,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:31,817 INFO L225 Difference]: With dead ends: 76 [2018-10-03 08:53:31,817 INFO L226 Difference]: Without dead ends: 75 [2018-10-03 08:53:31,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-10-03 08:53:31,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-03 08:53:31,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-03 08:53:31,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-03 08:53:31,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-03 08:53:31,823 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-10-03 08:53:31,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:31,824 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-03 08:53:31,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-03 08:53:31,824 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-03 08:53:31,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-03 08:53:31,824 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:31,824 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1] [2018-10-03 08:53:31,825 INFO L423 AbstractCegarLoop]: === Iteration 73 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:31,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:31,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779961, now seen corresponding path program 72 times [2018-10-03 08:53:31,825 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:31,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:31,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:31,826 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:31,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:35,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:35,593 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:35,593 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:35,600 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:53:36,028 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-03 08:53:36,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:36,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:36,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:36,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:36,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-03 08:53:36,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-03 08:53:36,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-03 08:53:36,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2018-10-03 08:53:36,134 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 75 states. [2018-10-03 08:53:39,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:39,729 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-03 08:53:39,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-03 08:53:39,730 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 74 [2018-10-03 08:53:39,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:39,731 INFO L225 Difference]: With dead ends: 77 [2018-10-03 08:53:39,731 INFO L226 Difference]: Without dead ends: 76 [2018-10-03 08:53:39,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2018-10-03 08:53:39,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-03 08:53:39,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-03 08:53:39,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-03 08:53:39,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-03 08:53:39,736 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-10-03 08:53:39,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:39,736 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-03 08:53:39,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-03 08:53:39,736 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-03 08:53:39,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-03 08:53:39,737 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:39,737 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1] [2018-10-03 08:53:39,737 INFO L423 AbstractCegarLoop]: === Iteration 74 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:39,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:39,738 INFO L82 PathProgramCache]: Analyzing trace with hash 365428705, now seen corresponding path program 73 times [2018-10-03 08:53:39,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:39,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:39,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:39,738 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:39,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:39,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:42,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:42,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:42,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:42,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:43,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:43,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:43,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:43,067 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:43,067 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-03 08:53:43,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-03 08:53:43,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-03 08:53:43,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2018-10-03 08:53:43,068 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-10-03 08:53:46,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:46,562 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-10-03 08:53:46,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-03 08:53:46,562 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-10-03 08:53:46,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:46,563 INFO L225 Difference]: With dead ends: 78 [2018-10-03 08:53:46,564 INFO L226 Difference]: Without dead ends: 77 [2018-10-03 08:53:46,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2018-10-03 08:53:46,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-03 08:53:46,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-03 08:53:46,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-03 08:53:46,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-03 08:53:46,569 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-10-03 08:53:46,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:46,569 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-03 08:53:46,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-03 08:53:46,569 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-03 08:53:46,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-03 08:53:46,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:46,570 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1] [2018-10-03 08:53:46,570 INFO L423 AbstractCegarLoop]: === Iteration 75 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:46,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:46,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1556612089, now seen corresponding path program 74 times [2018-10-03 08:53:46,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:46,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:46,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:46,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:46,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:46,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:51,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:51,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:51,445 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:51,452 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:53:51,475 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:53:51,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:51,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:51,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:51,527 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:51,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-03 08:53:51,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-03 08:53:51,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-03 08:53:51,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2018-10-03 08:53:51,529 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 77 states. [2018-10-03 08:53:55,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:55,226 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-03 08:53:55,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-03 08:53:55,227 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 76 [2018-10-03 08:53:55,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:55,228 INFO L225 Difference]: With dead ends: 79 [2018-10-03 08:53:55,228 INFO L226 Difference]: Without dead ends: 78 [2018-10-03 08:53:55,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2018-10-03 08:53:55,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-03 08:53:55,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-03 08:53:55,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-03 08:53:55,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-03 08:53:55,233 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-10-03 08:53:55,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:55,233 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-03 08:53:55,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-03 08:53:55,233 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-03 08:53:55,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-03 08:53:55,234 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:55,234 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1] [2018-10-03 08:53:55,234 INFO L423 AbstractCegarLoop]: === Iteration 76 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:55,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:55,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334559, now seen corresponding path program 75 times [2018-10-03 08:53:55,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:55,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:55,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:55,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:55,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:55,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:57,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:57,917 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:57,924 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:53:57,964 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-03 08:53:57,964 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:57,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:57,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:58,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:58,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-03 08:53:58,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-03 08:53:58,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-03 08:53:58,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2018-10-03 08:53:58,006 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-10-03 08:54:01,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:01,863 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-10-03 08:54:01,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-03 08:54:01,864 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-10-03 08:54:01,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:01,865 INFO L225 Difference]: With dead ends: 80 [2018-10-03 08:54:01,865 INFO L226 Difference]: Without dead ends: 79 [2018-10-03 08:54:01,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2018-10-03 08:54:01,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-03 08:54:01,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-03 08:54:01,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-03 08:54:01,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-03 08:54:01,868 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-10-03 08:54:01,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:01,868 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-03 08:54:01,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-03 08:54:01,869 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-03 08:54:01,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-03 08:54:01,869 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:01,869 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1] [2018-10-03 08:54:01,869 INFO L423 AbstractCegarLoop]: === Iteration 77 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:01,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:01,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600313, now seen corresponding path program 76 times [2018-10-03 08:54:01,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:01,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:01,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:01,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:01,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:05,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:05,590 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:05,590 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:05,598 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:05,620 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:05,620 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:05,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:05,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:05,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:05,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-03 08:54:05,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-03 08:54:05,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-03 08:54:05,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2018-10-03 08:54:05,661 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 79 states. [2018-10-03 08:54:09,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:09,341 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-03 08:54:09,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-03 08:54:09,341 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 78 [2018-10-03 08:54:09,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:09,342 INFO L225 Difference]: With dead ends: 81 [2018-10-03 08:54:09,342 INFO L226 Difference]: Without dead ends: 80 [2018-10-03 08:54:09,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2018-10-03 08:54:09,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-03 08:54:09,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-03 08:54:09,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-03 08:54:09,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-03 08:54:09,346 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-10-03 08:54:09,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:09,347 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-03 08:54:09,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-03 08:54:09,347 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-03 08:54:09,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-03 08:54:09,347 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:09,347 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1] [2018-10-03 08:54:09,347 INFO L423 AbstractCegarLoop]: === Iteration 78 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:09,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:09,348 INFO L82 PathProgramCache]: Analyzing trace with hash -268904095, now seen corresponding path program 77 times [2018-10-03 08:54:09,348 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:09,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:09,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:09,349 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:09,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:12,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:12,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:12,492 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:12,500 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:12,541 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-03 08:54:12,541 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:12,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:12,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:12,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:12,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-03 08:54:12,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-03 08:54:12,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-03 08:54:12,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2018-10-03 08:54:12,650 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-10-03 08:54:16,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:16,614 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-03 08:54:16,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-03 08:54:16,615 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-10-03 08:54:16,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:16,616 INFO L225 Difference]: With dead ends: 82 [2018-10-03 08:54:16,616 INFO L226 Difference]: Without dead ends: 81 [2018-10-03 08:54:16,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2018-10-03 08:54:16,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-03 08:54:16,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-03 08:54:16,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-03 08:54:16,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-03 08:54:16,621 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-10-03 08:54:16,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:16,622 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-03 08:54:16,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-03 08:54:16,622 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-03 08:54:16,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-03 08:54:16,622 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:16,622 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1] [2018-10-03 08:54:16,623 INFO L423 AbstractCegarLoop]: === Iteration 79 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:16,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:16,623 INFO L82 PathProgramCache]: Analyzing trace with hash 253907591, now seen corresponding path program 78 times [2018-10-03 08:54:16,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:16,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:16,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:16,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:16,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:19,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:19,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:19,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:19,712 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:19,803 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-10-03 08:54:19,804 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:19,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:19,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:19,845 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:19,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-03 08:54:19,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-03 08:54:19,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-03 08:54:19,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2018-10-03 08:54:19,846 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 81 states. [2018-10-03 08:54:23,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:23,890 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-03 08:54:23,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-03 08:54:23,890 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 80 [2018-10-03 08:54:23,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:23,891 INFO L225 Difference]: With dead ends: 83 [2018-10-03 08:54:23,891 INFO L226 Difference]: Without dead ends: 82 [2018-10-03 08:54:23,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2018-10-03 08:54:23,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-03 08:54:23,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-03 08:54:23,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-03 08:54:23,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-03 08:54:23,896 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-10-03 08:54:23,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:23,897 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-03 08:54:23,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-03 08:54:23,897 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-03 08:54:23,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-03 08:54:23,897 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:23,897 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1] [2018-10-03 08:54:23,898 INFO L423 AbstractCegarLoop]: === Iteration 80 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:23,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:23,898 INFO L82 PathProgramCache]: Analyzing trace with hash -718799327, now seen corresponding path program 79 times [2018-10-03 08:54:23,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:23,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:23,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:23,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:23,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:23,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:27,522 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:27,522 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:27,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:27,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:27,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:27,655 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:27,655 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-03 08:54:27,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-03 08:54:27,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-03 08:54:27,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2018-10-03 08:54:27,656 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-10-03 08:54:31,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:31,878 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-10-03 08:54:31,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-03 08:54:31,878 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-10-03 08:54:31,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:31,879 INFO L225 Difference]: With dead ends: 84 [2018-10-03 08:54:31,879 INFO L226 Difference]: Without dead ends: 83 [2018-10-03 08:54:31,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2018-10-03 08:54:31,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-03 08:54:31,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-03 08:54:31,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-03 08:54:31,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-03 08:54:31,884 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-10-03 08:54:31,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:31,884 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-03 08:54:31,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-03 08:54:31,884 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-03 08:54:31,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-03 08:54:31,885 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:31,885 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1] [2018-10-03 08:54:31,885 INFO L423 AbstractCegarLoop]: === Iteration 81 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:31,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:31,885 INFO L82 PathProgramCache]: Analyzing trace with hash -807942713, now seen corresponding path program 80 times [2018-10-03 08:54:31,885 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:31,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:31,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:31,886 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:31,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:35,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:35,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:35,269 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:35,276 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:35,303 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:35,303 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:35,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:35,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:35,358 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:35,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-03 08:54:35,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-03 08:54:35,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-03 08:54:35,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2018-10-03 08:54:35,359 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 83 states. [2018-10-03 08:54:39,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:39,632 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-03 08:54:39,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-03 08:54:39,632 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 82 [2018-10-03 08:54:39,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:39,633 INFO L225 Difference]: With dead ends: 85 [2018-10-03 08:54:39,633 INFO L226 Difference]: Without dead ends: 84 [2018-10-03 08:54:39,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2018-10-03 08:54:39,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-03 08:54:39,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-03 08:54:39,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-03 08:54:39,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-03 08:54:39,638 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-10-03 08:54:39,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:39,638 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-03 08:54:39,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-03 08:54:39,638 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-03 08:54:39,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-03 08:54:39,638 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:39,638 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1] [2018-10-03 08:54:39,639 INFO L423 AbstractCegarLoop]: === Iteration 82 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:39,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:39,639 INFO L82 PathProgramCache]: Analyzing trace with hash 723579617, now seen corresponding path program 81 times [2018-10-03 08:54:39,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:39,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:39,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:39,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:39,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-03 08:54:40,811 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-03 08:54:40,815 WARN L205 ceAbstractionStarter]: Timeout [2018-10-03 08:54:40,815 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 08:54:40 BoogieIcfgContainer [2018-10-03 08:54:40,815 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-03 08:54:40,816 INFO L168 Benchmark]: Toolchain (without parser) took 241957.45 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -88.6 MB). Free memory was 1.5 GB in the beginning and 919.9 MB in the end (delta: 548.3 MB). Peak memory consumption was 459.7 MB. Max. memory is 7.1 GB. [2018-10-03 08:54:40,817 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. [2018-10-03 08:54:40,818 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.48 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. [2018-10-03 08:54:40,818 INFO L168 Benchmark]: Boogie Preprocessor took 21.35 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. [2018-10-03 08:54:40,819 INFO L168 Benchmark]: RCFGBuilder took 255.25 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. [2018-10-03 08:54:40,819 INFO L168 Benchmark]: TraceAbstraction took 241631.50 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -88.6 MB). Free memory was 1.4 GB in the beginning and 919.9 MB in the end (delta: 527.2 MB). Peak memory consumption was 438.6 MB. Max. memory is 7.1 GB. [2018-10-03 08:54:40,822 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 42.48 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 21.35 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 255.25 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 241631.50 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -88.6 MB). Free memory was 1.4 GB in the beginning and 919.9 MB in the end (delta: 527.2 MB). Peak memory consumption was 438.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 21). Cancelled while BasicCegarLoop was analyzing trace of length 84 with TraceHistMax 81, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while NestedInterpolantsBuilder was constructing predicates for 82 interpolants. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. TIMEOUT Result, 241.5s OverallTime, 82 OverallIterations, 81 TraceHistogramMax, 121.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 163 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 187085 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 100.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6641 GetRequests, 3240 SyntacticMatches, 80 SemanticMatches, 3321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 110.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=81, 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: 0.3s AutomataMinimizationTime, 81 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 112.9s InterpolantComputationTime, 6802 NumberOfCodeBlocks, 6802 NumberOfCodeBlocksAsserted, 981 NumberOfCheckSat, 6641 ConstructedInterpolants, 0 QuantifiedInterpolants, 2526167 SizeOfPredicates, 0 NumberOfNonLiveVariables, 6880 ConjunctsInSsa, 6720 ConjunctsInUnsatCore, 161 InterpolantComputations, 1 PerfectInterpolantSequences, 0/177120 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/DivisibilityInterpolantRequired01-BackwardSuccess.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-03_08-54-40-831.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/DivisibilityInterpolantRequired01-BackwardSuccess.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-03_08-54-40-831.csv Completed graceful shutdown