java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired01-BackwardSuccess.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f [2018-10-04 12:54:25,597 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 12:54:25,599 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 12:54:25,611 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 12:54:25,612 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 12:54:25,613 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 12:54:25,614 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 12:54:25,616 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 12:54:25,617 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 12:54:25,618 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 12:54:25,619 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-04 12:54:25,663 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-04 12:54:25,685 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 12:54:25,686 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 12:54:25,687 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 12:54:25,687 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 12:54:25,688 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 12:54:25,688 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 12:54:25,689 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 12:54:25,689 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 12:54:25,689 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 12:54:25,689 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 12:54:25,689 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 12:54:25,690 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 12:54:25,690 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 12:54:25,690 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 12:54:25,690 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 12:54:25,690 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 12:54:25,691 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 12:54:25,692 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 12:54:25,692 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 12:54:25,692 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 12:54:25,693 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 12:54:25,693 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 12:54:25,693 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:54:25,693 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 12:54:25,694 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 12:54:25,694 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 12:54:25,694 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 12:54:25,694 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 12:54:25,694 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 12:54:25,695 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 12:54:25,695 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 12:54:25,742 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 12:54:25,754 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 12:54:25,761 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 12:54:25,762 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 12:54:25,763 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 12:54:25,764 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired01-BackwardSuccess.bpl [2018-10-04 12:54:25,764 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired01-BackwardSuccess.bpl' [2018-10-04 12:54:25,816 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 12:54:25,818 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 12:54:25,819 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 12:54:25,819 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 12:54:25,819 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 12:54:25,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:54:25" (1/1) ... [2018-10-04 12:54:25,855 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:54:25" (1/1) ... [2018-10-04 12:54:25,860 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-04 12:54:25,860 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-04 12:54:25,861 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-04 12:54:25,863 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 12:54:25,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 12:54:25,864 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 12:54:25,864 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 12:54:25,875 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:54:25" (1/1) ... [2018-10-04 12:54:25,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:54:25" (1/1) ... [2018-10-04 12:54:25,876 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:54:25" (1/1) ... [2018-10-04 12:54:25,876 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:54:25" (1/1) ... [2018-10-04 12:54:25,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:54:25" (1/1) ... [2018-10-04 12:54:25,884 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:54:25" (1/1) ... [2018-10-04 12:54:25,885 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:54:25" (1/1) ... [2018-10-04 12:54:25,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 12:54:25,886 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 12:54:25,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 12:54:25,887 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 12:54:25,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:54:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:54:25,950 INFO L130 BoogieDeclarations]: Found specification of procedure proc [2018-10-04 12:54:25,950 INFO L138 BoogieDeclarations]: Found implementation of procedure proc [2018-10-04 12:54:26,081 INFO L338 CfgBuilder]: Using library mode [2018-10-04 12:54:26,082 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:54:26 BoogieIcfgContainer [2018-10-04 12:54:26,082 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 12:54:26,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 12:54:26,083 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 12:54:26,086 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 12:54:26,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:54:25" (1/2) ... [2018-10-04 12:54:26,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ffee6e8 and model type DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 12:54:26, skipping insertion in model container [2018-10-04 12:54:26,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:54:26" (2/2) ... [2018-10-04 12:54:26,090 INFO L112 eAbstractionObserver]: Analyzing ICFG DivisibilityInterpolantRequired01-BackwardSuccess.bpl [2018-10-04 12:54:26,100 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 12:54:26,108 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 12:54:26,164 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 12:54:26,165 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 12:54:26,166 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 12:54:26,166 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 12:54:26,166 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 12:54:26,166 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 12:54:26,166 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 12:54:26,167 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 12:54:26,167 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 12:54:26,184 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-10-04 12:54:26,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-10-04 12:54:26,192 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:26,193 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-10-04 12:54:26,195 INFO L423 AbstractCegarLoop]: === Iteration 1 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:26,210 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:26,211 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-10-04 12:54:26,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:26,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:26,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:26,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:26,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:26,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:26,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:26,445 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:54:26,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-04 12:54:26,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 12:54:26,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 12:54:26,467 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:26,469 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-10-04 12:54:26,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:26,559 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-04 12:54:26,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 12:54:26,562 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-10-04 12:54:26,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:26,587 INFO L225 Difference]: With dead ends: 9 [2018-10-04 12:54:26,587 INFO L226 Difference]: Without dead ends: 4 [2018-10-04 12:54:26,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-04 12:54:26,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-10-04 12:54:26,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-10-04 12:54:26,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-10-04 12:54:26,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-10-04 12:54:26,642 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-10-04 12:54:26,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:26,642 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-10-04 12:54:26,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 12:54:26,643 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-10-04 12:54:26,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-04 12:54:26,643 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:26,643 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-04 12:54:26,644 INFO L423 AbstractCegarLoop]: === Iteration 2 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:26,644 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:26,644 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-10-04 12:54:26,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:26,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:26,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:26,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:26,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:26,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:26,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:26,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:26,851 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:26,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:26,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:26,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:26,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:26,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:26,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-10-04 12:54:26,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 12:54:26,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 12:54:26,995 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:26,995 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 4 states. [2018-10-04 12:54:27,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:27,125 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-10-04 12:54:27,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 12:54:27,126 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2018-10-04 12:54:27,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:27,127 INFO L225 Difference]: With dead ends: 6 [2018-10-04 12:54:27,127 INFO L226 Difference]: Without dead ends: 5 [2018-10-04 12:54:27,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 2 [2018-10-04 12:54:27,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-10-04 12:54:27,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-10-04 12:54:27,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-04 12:54:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-10-04 12:54:27,131 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-10-04 12:54:27,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:27,131 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-10-04 12:54:27,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 12:54:27,131 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-10-04 12:54:27,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 12:54:27,132 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:27,132 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-10-04 12:54:27,132 INFO L423 AbstractCegarLoop]: === Iteration 3 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:27,133 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:27,136 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-10-04 12:54:27,136 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:27,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:27,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:27,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:27,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:27,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:27,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:27,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:27,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:27,290 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:54:27,301 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:54:27,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:27,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:27,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:27,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:27,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 12:54:27,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 12:54:27,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 12:54:27,383 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:27,383 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-10-04 12:54:27,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:27,446 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-10-04 12:54:27,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:54:27,447 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-10-04 12:54:27,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:27,447 INFO L225 Difference]: With dead ends: 7 [2018-10-04 12:54:27,448 INFO L226 Difference]: Without dead ends: 6 [2018-10-04 12:54:27,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 3 [2018-10-04 12:54:27,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-04 12:54:27,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-04 12:54:27,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-04 12:54:27,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-04 12:54:27,451 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-04 12:54:27,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:27,451 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-04 12:54:27,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 12:54:27,452 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-04 12:54:27,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 12:54:27,452 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:27,452 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-10-04 12:54:27,453 INFO L423 AbstractCegarLoop]: === Iteration 4 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:27,453 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:27,453 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-10-04 12:54:27,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:27,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:27,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:27,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:27,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:27,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:27,565 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:27,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:27,580 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:54:27,596 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-04 12:54:27,596 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:27,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:27,677 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:27,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 12:54:27,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 12:54:27,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 12:54:27,678 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:27,678 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-10-04 12:54:27,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:27,760 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-10-04 12:54:27,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:54:27,760 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-10-04 12:54:27,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:27,761 INFO L225 Difference]: With dead ends: 8 [2018-10-04 12:54:27,761 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 12:54:27,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 4 [2018-10-04 12:54:27,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 12:54:27,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 12:54:27,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 12:54:27,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-04 12:54:27,766 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-04 12:54:27,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:27,767 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-04 12:54:27,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 12:54:27,767 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-04 12:54:27,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 12:54:27,767 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:27,768 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-10-04 12:54:27,768 INFO L423 AbstractCegarLoop]: === Iteration 5 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:27,769 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:27,769 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-10-04 12:54:27,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:27,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:27,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:27,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:27,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:28,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:28,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:28,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:28,067 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:54:28,072 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:54:28,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:28,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:28,110 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:28,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:28,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 12:54:28,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 12:54:28,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 12:54:28,134 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:28,134 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-10-04 12:54:28,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:28,201 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-04 12:54:28,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 12:54:28,202 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-10-04 12:54:28,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:28,202 INFO L225 Difference]: With dead ends: 9 [2018-10-04 12:54:28,202 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 12:54:28,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 5 [2018-10-04 12:54:28,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 12:54:28,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 12:54:28,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 12:54:28,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-04 12:54:28,207 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-04 12:54:28,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:28,207 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-04 12:54:28,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 12:54:28,207 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-04 12:54:28,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 12:54:28,208 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:28,208 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-10-04 12:54:28,208 INFO L423 AbstractCegarLoop]: === Iteration 6 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:28,208 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:28,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-10-04 12:54:28,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:28,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:28,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:28,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:28,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:28,445 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:28,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:28,446 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:28,454 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:54:28,485 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-04 12:54:28,485 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:28,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:28,538 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:28,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:28,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 12:54:28,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:54:28,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:54:28,560 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:28,560 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-10-04 12:54:28,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:28,632 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-04 12:54:28,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 12:54:28,632 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-10-04 12:54:28,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:28,633 INFO L225 Difference]: With dead ends: 10 [2018-10-04 12:54:28,633 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 12:54:28,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 6 [2018-10-04 12:54:28,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 12:54:28,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 12:54:28,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 12:54:28,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-04 12:54:28,638 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-04 12:54:28,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:28,639 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-04 12:54:28,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:54:28,639 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-04 12:54:28,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 12:54:28,640 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:28,640 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-10-04 12:54:28,640 INFO L423 AbstractCegarLoop]: === Iteration 7 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:28,640 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:28,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-10-04 12:54:28,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:28,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:28,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:28,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:28,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:28,796 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:28,796 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:28,797 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:28,806 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:54:28,812 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-04 12:54:28,812 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:28,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:28,869 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:28,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 12:54:28,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 12:54:28,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 12:54:28,870 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:28,870 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2018-10-04 12:54:29,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:29,387 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 12:54:29,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 12:54:29,388 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-10-04 12:54:29,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:29,388 INFO L225 Difference]: With dead ends: 11 [2018-10-04 12:54:29,388 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 12:54:29,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.1s impTime 7 [2018-10-04 12:54:29,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 12:54:29,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-04 12:54:29,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 12:54:29,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-04 12:54:29,393 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-04 12:54:29,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:29,393 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-04 12:54:29,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 12:54:29,393 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-04 12:54:29,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 12:54:29,393 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:29,394 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-10-04 12:54:29,394 INFO L423 AbstractCegarLoop]: === Iteration 8 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:29,394 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:29,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-10-04 12:54:29,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:29,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:29,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:29,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:29,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:29,550 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:29,551 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:29,551 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:29,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:29,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:29,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:29,650 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:29,672 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:29,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 12:54:29,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:54:29,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:54:29,673 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:29,673 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-10-04 12:54:29,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:29,758 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-04 12:54:29,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:54:29,758 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-10-04 12:54:29,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:29,759 INFO L225 Difference]: With dead ends: 12 [2018-10-04 12:54:29,760 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 12:54:29,760 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 8 [2018-10-04 12:54:29,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 12:54:29,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 12:54:29,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 12:54:29,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-04 12:54:29,764 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-04 12:54:29,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:29,764 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-04 12:54:29,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:54:29,764 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-04 12:54:29,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 12:54:29,765 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:29,765 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-10-04 12:54:29,765 INFO L423 AbstractCegarLoop]: === Iteration 9 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:29,765 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:29,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-10-04 12:54:29,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:29,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:29,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:29,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:29,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:29,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:29,905 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:29,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:29,906 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:29,913 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:54:29,919 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:54:29,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:29,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:29,974 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:29,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 12:54:29,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 12:54:29,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 12:54:29,976 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:29,976 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 11 states. [2018-10-04 12:54:30,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:30,117 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 12:54:30,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:54:30,118 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2018-10-04 12:54:30,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:30,119 INFO L225 Difference]: With dead ends: 13 [2018-10-04 12:54:30,119 INFO L226 Difference]: Without dead ends: 12 [2018-10-04 12:54:30,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 9 [2018-10-04 12:54:30,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-04 12:54:30,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-04 12:54:30,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 12:54:30,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-04 12:54:30,123 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-04 12:54:30,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:30,124 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-04 12:54:30,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 12:54:30,124 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-04 12:54:30,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 12:54:30,124 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:30,125 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-10-04 12:54:30,125 INFO L423 AbstractCegarLoop]: === Iteration 10 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:30,125 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:30,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-10-04 12:54:30,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:30,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:30,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:30,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:30,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:30,337 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:30,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:30,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:30,346 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:54:30,353 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 12:54:30,354 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:30,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:30,419 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:30,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 12:54:30,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 12:54:30,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 12:54:30,420 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:30,420 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-10-04 12:54:30,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:30,554 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-04 12:54:30,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 12:54:30,555 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-10-04 12:54:30,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:30,556 INFO L225 Difference]: With dead ends: 14 [2018-10-04 12:54:30,556 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 12:54:30,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 10 [2018-10-04 12:54:30,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 12:54:30,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 12:54:30,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 12:54:30,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-04 12:54:30,560 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-04 12:54:30,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:30,560 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-04 12:54:30,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 12:54:30,561 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-04 12:54:30,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 12:54:30,561 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:30,562 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-10-04 12:54:30,562 INFO L423 AbstractCegarLoop]: === Iteration 11 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:30,562 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:30,562 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-10-04 12:54:30,562 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:30,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:30,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:30,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:30,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:30,833 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:30,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:30,834 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:30,850 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:54:30,857 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:54:30,857 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:30,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:30,897 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:30,917 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:30,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 12:54:30,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 12:54:30,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 12:54:30,918 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:30,918 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-10-04 12:54:31,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:31,065 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-04 12:54:31,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 12:54:31,066 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-10-04 12:54:31,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:31,067 INFO L225 Difference]: With dead ends: 15 [2018-10-04 12:54:31,067 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 12:54:31,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 11 [2018-10-04 12:54:31,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 12:54:31,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-04 12:54:31,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 12:54:31,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-04 12:54:31,072 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-04 12:54:31,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:31,073 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-04 12:54:31,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 12:54:31,073 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-04 12:54:31,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 12:54:31,073 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:31,073 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-10-04 12:54:31,074 INFO L423 AbstractCegarLoop]: === Iteration 12 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:31,074 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:31,074 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-10-04 12:54:31,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:31,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:31,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:31,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:31,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:31,428 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:31,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:31,429 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:31,442 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:54:31,451 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 12:54:31,452 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:31,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:31,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:31,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 12:54:31,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:54:31,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:54:31,525 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:31,526 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-10-04 12:54:31,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:31,647 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-04 12:54:31,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 12:54:31,648 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-10-04 12:54:31,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:31,649 INFO L225 Difference]: With dead ends: 16 [2018-10-04 12:54:31,649 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 12:54:31,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 12 [2018-10-04 12:54:31,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 12:54:31,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 12:54:31,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 12:54:31,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-04 12:54:31,654 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-04 12:54:31,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:31,654 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-04 12:54:31,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:54:31,654 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-04 12:54:31,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 12:54:31,655 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:31,655 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-10-04 12:54:31,655 INFO L423 AbstractCegarLoop]: === Iteration 13 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:31,655 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:31,656 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-10-04 12:54:31,656 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:31,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:31,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:31,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:31,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:31,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:32,055 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:32,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:32,055 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:32,065 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:54:32,084 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 12:54:32,084 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:32,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:32,140 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:32,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:32,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 12:54:32,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 12:54:32,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 12:54:32,162 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:32,162 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-10-04 12:54:32,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:32,399 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 12:54:32,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 12:54:32,400 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-10-04 12:54:32,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:32,401 INFO L225 Difference]: With dead ends: 17 [2018-10-04 12:54:32,401 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 12:54:32,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 13 [2018-10-04 12:54:32,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 12:54:32,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-04 12:54:32,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 12:54:32,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-04 12:54:32,406 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-04 12:54:32,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:32,406 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-04 12:54:32,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 12:54:32,406 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-04 12:54:32,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 12:54:32,407 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:32,407 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-10-04 12:54:32,407 INFO L423 AbstractCegarLoop]: === Iteration 14 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:32,407 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:32,407 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-10-04 12:54:32,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:32,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:32,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:32,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:32,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:32,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:32,659 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:32,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:32,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:32,720 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:32,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:32,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 12:54:32,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 12:54:32,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 12:54:32,743 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:32,743 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-10-04 12:54:33,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:33,038 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-04 12:54:33,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 12:54:33,038 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-10-04 12:54:33,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:33,039 INFO L225 Difference]: With dead ends: 18 [2018-10-04 12:54:33,039 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 12:54:33,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 14 [2018-10-04 12:54:33,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 12:54:33,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 12:54:33,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 12:54:33,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-04 12:54:33,045 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-04 12:54:33,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:33,045 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-04 12:54:33,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 12:54:33,046 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-04 12:54:33,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 12:54:33,046 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:33,046 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-10-04 12:54:33,047 INFO L423 AbstractCegarLoop]: === Iteration 15 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:33,047 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:33,047 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-10-04 12:54:33,047 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:33,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:33,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:33,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:33,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:33,349 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:33,350 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:33,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:33,358 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:54:33,366 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:54:33,366 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:33,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:33,535 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:33,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:33,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 12:54:33,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 12:54:33,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 12:54:33,563 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:33,563 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-10-04 12:54:33,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:33,738 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-04 12:54:33,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 12:54:33,739 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-10-04 12:54:33,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:33,739 INFO L225 Difference]: With dead ends: 19 [2018-10-04 12:54:33,740 INFO L226 Difference]: Without dead ends: 18 [2018-10-04 12:54:33,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 15 [2018-10-04 12:54:33,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-04 12:54:33,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-04 12:54:33,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 12:54:33,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-04 12:54:33,746 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-04 12:54:33,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:33,746 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-04 12:54:33,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 12:54:33,747 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-04 12:54:33,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 12:54:33,747 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:33,747 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-10-04 12:54:33,748 INFO L423 AbstractCegarLoop]: === Iteration 16 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:33,748 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:33,748 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-10-04 12:54:33,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:33,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:33,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:33,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:33,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:34,379 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:34,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:34,379 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:34,388 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:54:34,411 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 12:54:34,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:34,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:34,510 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:34,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:34,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 12:54:34,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 12:54:34,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 12:54:34,531 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:34,531 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-10-04 12:54:34,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:34,766 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-04 12:54:34,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 12:54:34,766 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-10-04 12:54:34,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:34,767 INFO L225 Difference]: With dead ends: 20 [2018-10-04 12:54:34,767 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 12:54:34,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 16 [2018-10-04 12:54:34,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 12:54:34,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 12:54:34,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 12:54:34,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-04 12:54:34,771 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-04 12:54:34,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:34,772 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-04 12:54:34,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 12:54:34,772 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-04 12:54:34,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 12:54:34,773 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:34,773 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-10-04 12:54:34,773 INFO L423 AbstractCegarLoop]: === Iteration 17 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:34,773 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:34,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-10-04 12:54:34,773 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:34,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:34,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:34,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:34,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:35,186 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:35,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:35,187 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:35,194 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:54:35,201 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:54:35,201 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:35,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:35,427 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:35,447 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:35,447 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 12:54:35,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 12:54:35,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 12:54:35,448 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:35,448 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 19 states. [2018-10-04 12:54:35,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:35,701 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 12:54:35,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 12:54:35,702 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2018-10-04 12:54:35,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:35,702 INFO L225 Difference]: With dead ends: 21 [2018-10-04 12:54:35,703 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 12:54:35,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.2s impTime 17 [2018-10-04 12:54:35,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 12:54:35,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-04 12:54:35,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 12:54:35,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-04 12:54:35,708 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-04 12:54:35,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:35,708 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-04 12:54:35,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 12:54:35,708 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-04 12:54:35,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 12:54:35,709 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:35,709 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-10-04 12:54:35,709 INFO L423 AbstractCegarLoop]: === Iteration 18 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:35,709 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:35,709 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-10-04 12:54:35,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:35,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:35,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:35,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:35,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:36,531 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:36,532 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:36,532 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:36,539 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:54:36,551 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-04 12:54:36,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:36,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:36,839 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:36,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:36,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 12:54:36,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:54:36,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:54:36,861 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:36,861 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-10-04 12:54:37,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:37,230 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-04 12:54:37,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 12:54:37,230 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-10-04 12:54:37,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:37,231 INFO L225 Difference]: With dead ends: 22 [2018-10-04 12:54:37,231 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 12:54:37,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 18 [2018-10-04 12:54:37,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 12:54:37,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 12:54:37,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 12:54:37,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-04 12:54:37,236 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-04 12:54:37,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:37,237 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-04 12:54:37,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:54:37,237 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-04 12:54:37,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 12:54:37,237 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:37,238 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-10-04 12:54:37,238 INFO L423 AbstractCegarLoop]: === Iteration 19 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:37,238 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:37,238 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-10-04 12:54:37,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:37,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:37,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:37,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:37,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:37,694 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:54:37,695 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:37,695 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:37,695 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:37,705 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:54:37,724 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-04 12:54:37,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:37,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:37,784 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:37,806 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:37,806 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 12:54:37,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 12:54:37,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 12:54:37,807 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:37,807 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-10-04 12:54:38,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:38,140 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-04 12:54:38,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 12:54:38,141 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-10-04 12:54:38,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:38,141 INFO L225 Difference]: With dead ends: 23 [2018-10-04 12:54:38,142 INFO L226 Difference]: Without dead ends: 22 [2018-10-04 12:54:38,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime 19 [2018-10-04 12:54:38,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-04 12:54:38,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-04 12:54:38,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 12:54:38,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-04 12:54:38,146 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-04 12:54:38,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:38,147 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-04 12:54:38,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 12:54:38,147 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-04 12:54:38,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-04 12:54:38,148 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:38,148 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-10-04 12:54:38,148 INFO L423 AbstractCegarLoop]: === Iteration 20 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:38,148 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:38,148 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-10-04 12:54:38,148 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:38,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:38,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:38,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:38,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:38,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:38,657 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:54:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:38,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:38,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:38,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:38,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:38,796 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:38,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:38,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 12:54:38,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 12:54:38,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 12:54:38,827 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:38,827 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-10-04 12:54:39,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:39,159 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-04 12:54:39,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 12:54:39,159 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-10-04 12:54:39,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:39,160 INFO L225 Difference]: With dead ends: 24 [2018-10-04 12:54:39,160 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 12:54:39,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 20 [2018-10-04 12:54:39,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 12:54:39,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 12:54:39,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 12:54:39,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-04 12:54:39,165 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-04 12:54:39,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:39,166 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-04 12:54:39,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 12:54:39,166 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-04 12:54:39,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 12:54:39,167 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:39,167 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-10-04 12:54:39,167 INFO L423 AbstractCegarLoop]: === Iteration 21 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:39,167 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:39,167 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-10-04 12:54:39,167 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:39,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:39,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:39,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:39,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:39,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:39,786 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:54:39,844 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:39,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:39,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:39,856 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:54:39,886 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:54:39,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:39,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:39,950 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:39,971 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:39,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 12:54:39,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 12:54:39,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 12:54:39,972 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:39,972 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 23 states. [2018-10-04 12:54:40,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:40,303 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 12:54:40,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 12:54:40,304 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2018-10-04 12:54:40,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:40,305 INFO L225 Difference]: With dead ends: 25 [2018-10-04 12:54:40,305 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 12:54:40,306 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 21 [2018-10-04 12:54:40,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 12:54:40,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-04 12:54:40,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 12:54:40,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-04 12:54:40,310 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-04 12:54:40,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:40,310 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-04 12:54:40,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 12:54:40,310 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-04 12:54:40,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 12:54:40,311 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:40,311 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-10-04 12:54:40,311 INFO L423 AbstractCegarLoop]: === Iteration 22 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:40,311 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:40,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-10-04 12:54:40,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:40,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:40,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:40,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:40,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:40,708 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:54:40,779 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:40,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:40,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:40,788 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:54:40,800 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-04 12:54:40,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:40,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:40,884 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:40,884 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 12:54:40,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 12:54:40,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 12:54:40,885 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:40,885 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-10-04 12:54:41,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:41,302 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-04 12:54:41,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 12:54:41,305 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-10-04 12:54:41,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:41,306 INFO L225 Difference]: With dead ends: 26 [2018-10-04 12:54:41,306 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 12:54:41,306 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 22 [2018-10-04 12:54:41,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 12:54:41,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 12:54:41,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 12:54:41,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-04 12:54:41,310 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-04 12:54:41,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:41,311 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-04 12:54:41,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 12:54:41,311 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-04 12:54:41,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 12:54:41,312 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:41,312 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-10-04 12:54:41,312 INFO L423 AbstractCegarLoop]: === Iteration 23 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:41,312 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:41,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-10-04 12:54:41,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:41,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:41,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:41,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:41,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:41,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:41,673 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:54:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:41,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:41,775 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:41,784 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:54:41,791 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:54:41,791 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:41,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:41,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:41,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 12:54:41,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 12:54:41,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 12:54:41,861 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:41,861 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 25 states. [2018-10-04 12:54:42,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:42,398 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-04 12:54:42,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 12:54:42,398 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2018-10-04 12:54:42,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:42,399 INFO L225 Difference]: With dead ends: 27 [2018-10-04 12:54:42,399 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 12:54:42,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime 23 [2018-10-04 12:54:42,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 12:54:42,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-04 12:54:42,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 12:54:42,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-04 12:54:42,405 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-04 12:54:42,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:42,405 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-04 12:54:42,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 12:54:42,405 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-04 12:54:42,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-04 12:54:42,406 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:42,406 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-10-04 12:54:42,406 INFO L423 AbstractCegarLoop]: === Iteration 24 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:42,406 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:42,406 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-10-04 12:54:42,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:42,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:42,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:42,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:42,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:42,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:42,763 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:54:42,898 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:42,898 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:42,898 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:42,907 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:54:42,918 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-04 12:54:42,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:42,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:42,999 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:42,999 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 12:54:42,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 12:54:42,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 12:54:42,999 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:43,000 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-10-04 12:54:43,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:43,780 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-04 12:54:43,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 12:54:43,780 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-10-04 12:54:43,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:43,781 INFO L225 Difference]: With dead ends: 28 [2018-10-04 12:54:43,781 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 12:54:43,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 24 [2018-10-04 12:54:43,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 12:54:43,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 12:54:43,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 12:54:43,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-04 12:54:43,786 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-04 12:54:43,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:43,786 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-04 12:54:43,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 12:54:43,786 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-04 12:54:43,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 12:54:43,787 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:43,787 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-10-04 12:54:43,787 INFO L423 AbstractCegarLoop]: === Iteration 25 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:43,788 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:43,788 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-10-04 12:54:43,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:43,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:43,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:43,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:43,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:43,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:44,090 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:54:44,253 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:44,253 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:44,253 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:44,262 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:54:44,274 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 12:54:44,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:44,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:44,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:44,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 12:54:44,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 12:54:44,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 12:54:44,357 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:44,358 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 27 states. [2018-10-04 12:54:44,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:44,804 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-04 12:54:44,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 12:54:44,805 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2018-10-04 12:54:44,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:44,805 INFO L225 Difference]: With dead ends: 29 [2018-10-04 12:54:44,806 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 12:54:44,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime 25 [2018-10-04 12:54:44,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 12:54:44,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-04 12:54:44,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 12:54:44,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-04 12:54:44,811 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-04 12:54:44,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:44,811 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-04 12:54:44,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 12:54:44,811 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-04 12:54:44,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 12:54:44,812 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:44,812 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-10-04 12:54:44,812 INFO L423 AbstractCegarLoop]: === Iteration 26 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:44,812 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:44,812 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-10-04 12:54:44,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:44,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:44,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:44,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:44,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:45,173 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:54:45,377 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:45,377 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:45,377 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:45,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:45,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:45,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:45,462 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:45,482 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:45,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 12:54:45,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 12:54:45,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 12:54:45,483 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:45,483 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-10-04 12:54:45,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:45,956 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-04 12:54:45,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 12:54:45,962 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-10-04 12:54:45,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:45,963 INFO L225 Difference]: With dead ends: 30 [2018-10-04 12:54:45,963 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 12:54:45,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.4s impTime 26 [2018-10-04 12:54:45,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 12:54:45,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 12:54:45,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 12:54:45,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-04 12:54:45,968 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-04 12:54:45,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:45,968 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-04 12:54:45,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 12:54:45,968 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-04 12:54:45,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 12:54:45,969 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:45,969 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-10-04 12:54:45,969 INFO L423 AbstractCegarLoop]: === Iteration 27 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:45,969 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:45,970 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-10-04 12:54:45,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:45,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:45,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:45,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:45,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:45,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:46,327 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:54:46,552 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:46,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:46,552 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:46,559 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:54:46,568 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:54:46,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:46,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:46,671 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:46,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:46,692 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 12:54:46,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 12:54:46,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 12:54:46,692 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:46,692 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 29 states. [2018-10-04 12:54:47,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:47,254 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-04 12:54:47,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 12:54:47,254 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 28 [2018-10-04 12:54:47,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:47,255 INFO L225 Difference]: With dead ends: 31 [2018-10-04 12:54:47,255 INFO L226 Difference]: Without dead ends: 30 [2018-10-04 12:54:47,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 27 [2018-10-04 12:54:47,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-04 12:54:47,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-04 12:54:47,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 12:54:47,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-04 12:54:47,258 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-04 12:54:47,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:47,259 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-04 12:54:47,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 12:54:47,259 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-04 12:54:47,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-04 12:54:47,259 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:47,259 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-10-04 12:54:47,260 INFO L423 AbstractCegarLoop]: === Iteration 28 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:47,260 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:47,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-10-04 12:54:47,260 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:47,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:47,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:47,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:47,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:47,655 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:54:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:47,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:47,911 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:47,929 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:54:47,961 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 12:54:47,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:47,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:48,040 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:48,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:48,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 12:54:48,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 12:54:48,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 12:54:48,063 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:48,063 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-10-04 12:54:48,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:48,550 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-04 12:54:48,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 12:54:48,551 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-10-04 12:54:48,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:48,551 INFO L225 Difference]: With dead ends: 32 [2018-10-04 12:54:48,551 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 12:54:48,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.5s impTime 28 [2018-10-04 12:54:48,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 12:54:48,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 12:54:48,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 12:54:48,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-04 12:54:48,557 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-04 12:54:48,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:48,557 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-04 12:54:48,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 12:54:48,557 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-04 12:54:48,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 12:54:48,558 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:48,558 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-10-04 12:54:48,558 INFO L423 AbstractCegarLoop]: === Iteration 29 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:48,558 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:48,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-10-04 12:54:48,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:48,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:48,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:48,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:48,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:49,750 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:54:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:50,036 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:50,036 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:50,044 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:54:50,057 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:54:50,057 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:50,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:50,149 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:50,170 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:50,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 12:54:50,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 12:54:50,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 12:54:50,171 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:50,172 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 31 states. [2018-10-04 12:54:50,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:50,709 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-04 12:54:50,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 12:54:50,709 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2018-10-04 12:54:50,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:50,710 INFO L225 Difference]: With dead ends: 33 [2018-10-04 12:54:50,710 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 12:54:50,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.1s impTime 29 [2018-10-04 12:54:50,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 12:54:50,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-04 12:54:50,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 12:54:50,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-04 12:54:50,716 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-04 12:54:50,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:50,716 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-04 12:54:50,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 12:54:50,716 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-04 12:54:50,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-04 12:54:50,717 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:50,717 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-10-04 12:54:50,717 INFO L423 AbstractCegarLoop]: === Iteration 30 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:50,717 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:50,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-10-04 12:54:50,718 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:50,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:50,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:50,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:50,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:50,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:51,040 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:54:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:51,362 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:51,362 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:51,375 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:54:51,388 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-04 12:54:51,388 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:51,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:51,486 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:51,507 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:51,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 12:54:51,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 12:54:51,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 12:54:51,508 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:51,508 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-10-04 12:54:52,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:52,101 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-04 12:54:52,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 12:54:52,102 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-10-04 12:54:52,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:52,102 INFO L225 Difference]: With dead ends: 34 [2018-10-04 12:54:52,103 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 12:54:52,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime 30 [2018-10-04 12:54:52,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 12:54:52,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 12:54:52,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 12:54:52,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-04 12:54:52,108 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-04 12:54:52,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:52,108 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-04 12:54:52,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 12:54:52,108 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-04 12:54:52,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 12:54:52,109 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:52,109 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-10-04 12:54:52,109 INFO L423 AbstractCegarLoop]: === Iteration 31 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:52,109 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:52,110 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-10-04 12:54:52,110 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:52,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:52,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:52,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:52,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:52,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:52,665 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:54:53,063 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:53,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:53,064 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:53,072 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:54:53,092 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-04 12:54:53,092 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:53,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:53,213 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:53,233 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:53,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 12:54:53,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 12:54:53,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 12:54:53,234 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:53,234 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 33 states. [2018-10-04 12:54:53,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:53,869 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-04 12:54:53,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 12:54:53,869 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2018-10-04 12:54:53,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:53,870 INFO L225 Difference]: With dead ends: 35 [2018-10-04 12:54:53,870 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 12:54:53,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.7s impTime 31 [2018-10-04 12:54:53,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 12:54:53,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-04 12:54:53,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 12:54:53,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-04 12:54:53,875 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-04 12:54:53,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:53,876 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-04 12:54:53,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 12:54:53,876 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-04 12:54:53,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-04 12:54:53,876 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:53,876 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-10-04 12:54:53,877 INFO L423 AbstractCegarLoop]: === Iteration 32 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:53,877 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:53,877 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-10-04 12:54:53,877 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:53,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:53,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:53,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:53,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:53,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:54,685 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:54:55,096 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:55,096 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:55,097 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:55,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:55,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:55,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:55,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:55,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-04 12:54:55,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 12:54:55,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 12:54:55,235 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:55,235 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-10-04 12:54:55,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:55,893 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-04 12:54:55,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 12:54:55,894 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-10-04 12:54:55,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:55,894 INFO L225 Difference]: With dead ends: 36 [2018-10-04 12:54:55,895 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 12:54:55,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.9s impTime 32 [2018-10-04 12:54:55,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 12:54:55,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 12:54:55,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 12:54:55,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-04 12:54:55,900 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-04 12:54:55,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:55,900 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-04 12:54:55,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 12:54:55,901 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-04 12:54:55,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 12:54:55,901 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:55,901 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-10-04 12:54:55,901 INFO L423 AbstractCegarLoop]: === Iteration 33 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:55,901 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:55,901 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-10-04 12:54:55,902 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:55,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:55,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:55,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:55,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:56,312 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:54:56,750 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:56,750 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:56,750 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:56,758 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:54:56,767 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:54:56,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:56,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:56,912 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:56,942 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:56,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 12:54:56,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 12:54:56,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 12:54:56,943 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:56,943 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 35 states. [2018-10-04 12:54:57,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:57,845 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-04 12:54:57,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 12:54:57,845 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2018-10-04 12:54:57,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:57,846 INFO L225 Difference]: With dead ends: 37 [2018-10-04 12:54:57,846 INFO L226 Difference]: Without dead ends: 36 [2018-10-04 12:54:57,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 33 [2018-10-04 12:54:57,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-04 12:54:57,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-04 12:54:57,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-04 12:54:57,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-04 12:54:57,852 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-04 12:54:57,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:57,852 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-04 12:54:57,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 12:54:57,852 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-04 12:54:57,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-04 12:54:57,853 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:57,853 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-10-04 12:54:57,853 INFO L423 AbstractCegarLoop]: === Iteration 34 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:57,853 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:57,853 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-10-04 12:54:57,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:57,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:57,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:57,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:57,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:58,602 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:54:59,058 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:59,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:59,059 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:59,066 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:54:59,085 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-04 12:54:59,085 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:59,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:59,147 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:59,168 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:59,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 12:54:59,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 12:54:59,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 12:54:59,168 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:59,168 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-10-04 12:54:59,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:59,882 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-04 12:54:59,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 12:54:59,883 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-10-04 12:54:59,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:59,883 INFO L225 Difference]: With dead ends: 38 [2018-10-04 12:54:59,884 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 12:54:59,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.9s impTime 34 [2018-10-04 12:54:59,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 12:54:59,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 12:54:59,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 12:54:59,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-04 12:54:59,889 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-04 12:54:59,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:59,889 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-04 12:54:59,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 12:54:59,889 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-04 12:54:59,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 12:54:59,890 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:59,890 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-10-04 12:54:59,890 INFO L423 AbstractCegarLoop]: === Iteration 35 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:59,890 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:59,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-10-04 12:54:59,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:59,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:59,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:59,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:59,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:00,326 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:55:00,908 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:55:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:00,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:00,912 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:00,919 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:55:00,931 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:55:00,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:00,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:01,144 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:01,164 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:01,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 12:55:01,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 12:55:01,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 12:55:01,165 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:01,165 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 37 states. [2018-10-04 12:55:01,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:01,942 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-04 12:55:01,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 12:55:01,942 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 36 [2018-10-04 12:55:01,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:01,943 INFO L225 Difference]: With dead ends: 39 [2018-10-04 12:55:01,943 INFO L226 Difference]: Without dead ends: 38 [2018-10-04 12:55:01,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.7s impTime 35 [2018-10-04 12:55:01,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-04 12:55:01,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-04 12:55:01,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-04 12:55:01,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-04 12:55:01,946 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-04 12:55:01,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:01,946 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-04 12:55:01,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 12:55:01,947 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-04 12:55:01,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-04 12:55:01,947 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:01,947 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-10-04 12:55:01,947 INFO L423 AbstractCegarLoop]: === Iteration 36 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:01,947 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:01,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-10-04 12:55:01,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:01,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:01,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:01,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:01,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:02,325 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:55:03,029 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:55:03,071 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:03,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:03,072 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:03,079 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:55:03,095 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 12:55:03,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:03,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:03,189 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:03,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 12:55:03,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 12:55:03,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 12:55:03,190 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:03,190 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-10-04 12:55:04,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:04,004 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-04 12:55:04,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 12:55:04,004 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-10-04 12:55:04,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:04,005 INFO L225 Difference]: With dead ends: 40 [2018-10-04 12:55:04,005 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 12:55:04,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.9s impTime 36 [2018-10-04 12:55:04,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 12:55:04,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 12:55:04,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 12:55:04,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-04 12:55:04,010 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-04 12:55:04,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:04,010 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-04 12:55:04,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 12:55:04,010 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-04 12:55:04,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 12:55:04,011 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:04,011 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-10-04 12:55:04,011 INFO L423 AbstractCegarLoop]: === Iteration 37 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:04,011 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:04,011 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-10-04 12:55:04,011 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:04,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:04,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:04,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:04,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:04,491 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:55:05,035 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:55:05,122 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:05,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:05,122 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:05,130 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:55:05,147 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 12:55:05,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:05,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:05,221 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:05,241 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:05,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 12:55:05,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 12:55:05,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 12:55:05,241 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:05,241 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 39 states. [2018-10-04 12:55:06,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:06,072 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-04 12:55:06,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 12:55:06,072 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2018-10-04 12:55:06,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:06,073 INFO L225 Difference]: With dead ends: 41 [2018-10-04 12:55:06,073 INFO L226 Difference]: Without dead ends: 40 [2018-10-04 12:55:06,073 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.7s impTime 37 [2018-10-04 12:55:06,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-04 12:55:06,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-04 12:55:06,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 12:55:06,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-04 12:55:06,077 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-04 12:55:06,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:06,077 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-04 12:55:06,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 12:55:06,077 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-04 12:55:06,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-04 12:55:06,078 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:06,078 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-10-04 12:55:06,078 INFO L423 AbstractCegarLoop]: === Iteration 38 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:06,078 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:06,078 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-10-04 12:55:06,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:06,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:06,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:06,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:06,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:06,407 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:55:06,943 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:55:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:07,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:07,079 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:07,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:55:07,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:07,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:07,249 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:07,249 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-04 12:55:07,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 12:55:07,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 12:55:07,249 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:07,250 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-10-04 12:55:08,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:08,360 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-04 12:55:08,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 12:55:08,361 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-10-04 12:55:08,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:08,361 INFO L225 Difference]: With dead ends: 42 [2018-10-04 12:55:08,361 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 12:55:08,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.8s impTime 38 [2018-10-04 12:55:08,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 12:55:08,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 12:55:08,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 12:55:08,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-04 12:55:08,365 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-04 12:55:08,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:08,366 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-04 12:55:08,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 12:55:08,366 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-04 12:55:08,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 12:55:08,366 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:08,366 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-10-04 12:55:08,366 INFO L423 AbstractCegarLoop]: === Iteration 39 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:08,367 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:08,367 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-10-04 12:55:08,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:08,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:08,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:08,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:55:08,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:08,718 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:55:09,946 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:55:10,116 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:10,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:10,117 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:10,126 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:55:10,139 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:55:10,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:10,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:10,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:10,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 12:55:10,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 12:55:10,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 12:55:10,237 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:10,237 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 41 states. [2018-10-04 12:55:11,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:11,204 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-04 12:55:11,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 12:55:11,204 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 40 [2018-10-04 12:55:11,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:11,205 INFO L225 Difference]: With dead ends: 43 [2018-10-04 12:55:11,205 INFO L226 Difference]: Without dead ends: 42 [2018-10-04 12:55:11,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.5s impTime 39 [2018-10-04 12:55:11,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-04 12:55:11,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-04 12:55:11,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-04 12:55:11,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-04 12:55:11,209 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-04 12:55:11,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:11,209 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-04 12:55:11,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 12:55:11,210 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-04 12:55:11,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-04 12:55:11,210 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:11,210 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-10-04 12:55:11,210 INFO L423 AbstractCegarLoop]: === Iteration 40 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:11,211 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:11,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-10-04 12:55:11,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:11,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:11,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:11,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:11,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:11,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:11,597 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:55:12,135 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:55:12,343 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:12,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:12,343 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:12,351 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:55:12,374 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-04 12:55:12,374 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:12,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:12,477 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:12,497 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:12,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 12:55:12,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 12:55:12,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 12:55:12,498 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:12,498 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-10-04 12:55:13,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:13,670 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-04 12:55:13,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 12:55:13,670 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-10-04 12:55:13,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:13,671 INFO L225 Difference]: With dead ends: 44 [2018-10-04 12:55:13,671 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 12:55:13,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.9s impTime 40 [2018-10-04 12:55:13,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 12:55:13,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 12:55:13,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 12:55:13,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-04 12:55:13,676 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-04 12:55:13,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:13,676 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-04 12:55:13,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 12:55:13,676 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-04 12:55:13,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 12:55:13,677 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:13,677 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-10-04 12:55:13,677 INFO L423 AbstractCegarLoop]: === Iteration 41 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:13,677 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:13,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-10-04 12:55:13,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:13,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:13,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:13,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:13,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:13,962 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:55:14,504 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:55:14,785 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:14,786 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:14,786 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:14,793 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:55:14,807 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:55:14,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:14,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:14,915 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:14,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 12:55:14,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 12:55:14,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 12:55:14,916 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:14,916 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 43 states. [2018-10-04 12:55:16,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:16,031 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-04 12:55:16,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 12:55:16,031 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2018-10-04 12:55:16,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:16,032 INFO L225 Difference]: With dead ends: 45 [2018-10-04 12:55:16,032 INFO L226 Difference]: Without dead ends: 44 [2018-10-04 12:55:16,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.9s impTime 41 [2018-10-04 12:55:16,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-04 12:55:16,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-04 12:55:16,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-04 12:55:16,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-04 12:55:16,036 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-04 12:55:16,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:16,036 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-04 12:55:16,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 12:55:16,036 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-04 12:55:16,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-04 12:55:16,036 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:16,037 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-10-04 12:55:16,037 INFO L423 AbstractCegarLoop]: === Iteration 42 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:16,037 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:16,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-10-04 12:55:16,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:16,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:16,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:16,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:16,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:16,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:16,329 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:55:16,852 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:55:17,153 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:17,153 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:17,153 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:17,161 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:55:17,181 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-04 12:55:17,182 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:17,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:17,260 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:17,279 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:17,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 12:55:17,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 12:55:17,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 12:55:17,280 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:17,280 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-10-04 12:55:18,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:18,534 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-04 12:55:18,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 12:55:18,535 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-10-04 12:55:18,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:18,535 INFO L225 Difference]: With dead ends: 46 [2018-10-04 12:55:18,535 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 12:55:18,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.9s impTime 42 [2018-10-04 12:55:18,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 12:55:18,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-04 12:55:18,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 12:55:18,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-04 12:55:18,539 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-04 12:55:18,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:18,539 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-04 12:55:18,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 12:55:18,539 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-04 12:55:18,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 12:55:18,539 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:18,540 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-10-04 12:55:18,540 INFO L423 AbstractCegarLoop]: === Iteration 43 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:18,540 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:18,540 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-10-04 12:55:18,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:18,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:18,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:18,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:18,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:19,029 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:55:19,566 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:55:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:19,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:19,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:19,941 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:55:19,961 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-04 12:55:19,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:19,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:20,108 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:20,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:20,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 12:55:20,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 12:55:20,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 12:55:20,129 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:20,129 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 45 states. [2018-10-04 12:55:21,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:21,250 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-04 12:55:21,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 12:55:21,251 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 44 [2018-10-04 12:55:21,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:21,252 INFO L225 Difference]: With dead ends: 47 [2018-10-04 12:55:21,252 INFO L226 Difference]: Without dead ends: 46 [2018-10-04 12:55:21,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.1s impTime 43 [2018-10-04 12:55:21,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-04 12:55:21,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-04 12:55:21,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 12:55:21,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-04 12:55:21,256 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-04 12:55:21,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:21,256 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-04 12:55:21,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 12:55:21,257 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-04 12:55:21,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-04 12:55:21,257 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:21,257 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-10-04 12:55:21,257 INFO L423 AbstractCegarLoop]: === Iteration 44 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:21,257 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:21,257 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-10-04 12:55:21,257 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:21,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:21,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:21,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:21,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:21,709 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:55:22,244 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:55:22,672 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:22,672 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:22,672 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:22,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:55:22,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:22,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:22,796 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:22,816 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:22,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-04 12:55:22,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 12:55:22,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 12:55:22,816 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:22,817 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-10-04 12:55:24,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:24,163 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-04 12:55:24,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 12:55:24,164 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-10-04 12:55:24,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:24,164 INFO L225 Difference]: With dead ends: 48 [2018-10-04 12:55:24,164 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 12:55:24,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.1s impTime 44 [2018-10-04 12:55:24,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 12:55:24,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 12:55:24,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 12:55:24,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-04 12:55:24,168 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-04 12:55:24,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:24,169 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-04 12:55:24,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 12:55:24,169 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-04 12:55:24,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 12:55:24,169 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:24,169 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1] [2018-10-04 12:55:24,170 INFO L423 AbstractCegarLoop]: === Iteration 45 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:24,170 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:24,170 INFO L82 PathProgramCache]: Analyzing trace with hash 667835207, now seen corresponding path program 44 times [2018-10-04 12:55:24,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:24,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:24,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:24,171 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:55:24,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:24,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:24,502 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:55:25,184 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:55:25,650 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:25,650 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:25,650 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:25,658 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:55:25,673 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:55:25,673 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:25,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:25,766 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:25,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:25,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 12:55:25,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 12:55:25,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 12:55:25,786 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:25,787 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 47 states. [2018-10-04 12:55:27,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:27,072 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-04 12:55:27,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 12:55:27,073 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 46 [2018-10-04 12:55:27,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:27,073 INFO L225 Difference]: With dead ends: 49 [2018-10-04 12:55:27,074 INFO L226 Difference]: Without dead ends: 48 [2018-10-04 12:55:27,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.2s impTime 45 [2018-10-04 12:55:27,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-04 12:55:27,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-04 12:55:27,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-04 12:55:27,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-04 12:55:27,078 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-04 12:55:27,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:27,078 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-04 12:55:27,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 12:55:27,078 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-04 12:55:27,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 12:55:27,078 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:27,078 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1] [2018-10-04 12:55:27,079 INFO L423 AbstractCegarLoop]: === Iteration 46 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:27,079 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:27,079 INFO L82 PathProgramCache]: Analyzing trace with hash -771945119, now seen corresponding path program 45 times [2018-10-04 12:55:27,079 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:27,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:27,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:27,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:27,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:27,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:28,602 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:55:29,133 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:55:29,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:29,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:29,659 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:29,669 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:55:29,691 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-04 12:55:29,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:29,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:29,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:29,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:29,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 12:55:29,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 12:55:29,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 12:55:29,826 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:29,826 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-10-04 12:55:31,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:31,189 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-04 12:55:31,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 12:55:31,190 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-10-04 12:55:31,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:31,191 INFO L225 Difference]: With dead ends: 50 [2018-10-04 12:55:31,191 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 12:55:31,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.1s impTime 46 [2018-10-04 12:55:31,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 12:55:31,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 12:55:31,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 12:55:31,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-04 12:55:31,195 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-04 12:55:31,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:31,195 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-04 12:55:31,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 12:55:31,196 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-04 12:55:31,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 12:55:31,196 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:31,196 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1] [2018-10-04 12:55:31,196 INFO L423 AbstractCegarLoop]: === Iteration 47 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:31,196 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:31,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505031, now seen corresponding path program 46 times [2018-10-04 12:55:31,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:31,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:31,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:31,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:31,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:31,517 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:55:32,069 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:55:32,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:32,653 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:32,653 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:32,662 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:55:32,678 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:55:32,678 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:32,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:32,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:32,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:32,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 12:55:32,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 12:55:32,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 12:55:32,805 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:32,805 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 49 states. [2018-10-04 12:55:34,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:34,350 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-04 12:55:34,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 12:55:34,351 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 48 [2018-10-04 12:55:34,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:34,352 INFO L225 Difference]: With dead ends: 51 [2018-10-04 12:55:34,352 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 12:55:34,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.2s impTime 47 [2018-10-04 12:55:34,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 12:55:34,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-04 12:55:34,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 12:55:34,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-04 12:55:34,355 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-04 12:55:34,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:34,356 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-04 12:55:34,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 12:55:34,356 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-04 12:55:34,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-04 12:55:34,356 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:34,357 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1] [2018-10-04 12:55:34,357 INFO L423 AbstractCegarLoop]: === Iteration 48 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:34,357 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:34,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081057, now seen corresponding path program 47 times [2018-10-04 12:55:34,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:34,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:34,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:34,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:34,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:34,852 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:55:35,394 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:55:36,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:36,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:36,028 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:36,036 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:55:36,058 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-04 12:55:36,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:36,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:36,215 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:36,215 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-04 12:55:36,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 12:55:36,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 12:55:36,216 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:36,216 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-10-04 12:55:37,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:37,686 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-04 12:55:37,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 12:55:37,687 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-10-04 12:55:37,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:37,688 INFO L225 Difference]: With dead ends: 52 [2018-10-04 12:55:37,688 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 12:55:37,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.4s impTime 48 [2018-10-04 12:55:37,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 12:55:37,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 12:55:37,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 12:55:37,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-04 12:55:37,692 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-04 12:55:37,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:37,692 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-04 12:55:37,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 12:55:37,692 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-04 12:55:37,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 12:55:37,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:37,693 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1] [2018-10-04 12:55:37,693 INFO L423 AbstractCegarLoop]: === Iteration 49 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:37,693 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:37,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192953, now seen corresponding path program 48 times [2018-10-04 12:55:37,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:37,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:37,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:37,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:37,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:37,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:38,635 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:55:39,226 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:55:39,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:39,936 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:39,936 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:39,944 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:55:39,967 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 12:55:39,967 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:39,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:40,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:40,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:40,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 12:55:40,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 12:55:40,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 12:55:40,115 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:40,115 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 51 states. [2018-10-04 12:55:41,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:41,633 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-04 12:55:41,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 12:55:41,634 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 50 [2018-10-04 12:55:41,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:41,635 INFO L225 Difference]: With dead ends: 53 [2018-10-04 12:55:41,635 INFO L226 Difference]: Without dead ends: 52 [2018-10-04 12:55:41,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 1.8s impTime 49 [2018-10-04 12:55:41,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-04 12:55:41,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-04 12:55:41,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 12:55:41,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-04 12:55:41,640 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-04 12:55:41,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:41,640 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-04 12:55:41,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 12:55:41,640 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-04 12:55:41,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-04 12:55:41,640 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:41,641 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1] [2018-10-04 12:55:41,641 INFO L423 AbstractCegarLoop]: === Iteration 50 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:41,641 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:41,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593249, now seen corresponding path program 49 times [2018-10-04 12:55:41,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:41,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:41,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:41,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:41,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:41,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:41,972 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:55:42,512 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:55:43,308 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 12:55:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:43,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:43,314 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:43,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:55:43,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:43,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:43,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:43,478 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:43,478 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-04 12:55:43,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 12:55:43,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 12:55:43,479 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:43,479 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-10-04 12:55:45,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:45,210 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-04 12:55:45,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 12:55:45,211 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-10-04 12:55:45,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:45,211 INFO L225 Difference]: With dead ends: 54 [2018-10-04 12:55:45,212 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 12:55:45,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.4s impTime 50 [2018-10-04 12:55:45,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 12:55:45,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 12:55:45,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 12:55:45,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-04 12:55:45,216 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-04 12:55:45,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:45,216 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-04 12:55:45,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 12:55:45,216 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-04 12:55:45,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 12:55:45,217 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:45,217 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1] [2018-10-04 12:55:45,217 INFO L423 AbstractCegarLoop]: === Iteration 51 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:45,217 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:45,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1250315001, now seen corresponding path program 50 times [2018-10-04 12:55:45,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:45,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:45,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:45,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:55:45,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:45,814 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:55:46,364 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:55:47,238 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 12:55:47,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:47,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:47,450 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:47,459 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:55:47,476 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:55:47,476 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:47,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:47,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:47,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:47,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 12:55:47,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 12:55:47,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 12:55:47,592 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:47,592 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 53 states. [2018-10-04 12:55:49,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:49,338 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-04 12:55:49,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 12:55:49,339 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 52 [2018-10-04 12:55:49,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:49,340 INFO L225 Difference]: With dead ends: 55 [2018-10-04 12:55:49,340 INFO L226 Difference]: Without dead ends: 54 [2018-10-04 12:55:49,340 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.7s impTime 51 [2018-10-04 12:55:49,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-04 12:55:49,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-04 12:55:49,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-04 12:55:49,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-04 12:55:49,343 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-04 12:55:49,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:49,343 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-04 12:55:49,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 12:55:49,343 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-04 12:55:49,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 12:55:49,344 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:49,344 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1] [2018-10-04 12:55:49,344 INFO L423 AbstractCegarLoop]: === Iteration 52 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:49,344 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:49,344 INFO L82 PathProgramCache]: Analyzing trace with hash -105059423, now seen corresponding path program 51 times [2018-10-04 12:55:49,345 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:49,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:49,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:49,345 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:49,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:49,726 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:55:50,282 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:55:51,050 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 12:55:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:51,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:51,167 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:51,176 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:55:51,202 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-04 12:55:51,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:51,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:51,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:51,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:51,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 12:55:51,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 12:55:51,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 12:55:51,324 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:51,324 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-10-04 12:55:52,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:52,954 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-04 12:55:52,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 12:55:52,954 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-10-04 12:55:52,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:52,955 INFO L225 Difference]: With dead ends: 56 [2018-10-04 12:55:52,955 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 12:55:52,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.4s impTime 52 [2018-10-04 12:55:52,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 12:55:52,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 12:55:52,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 12:55:52,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-04 12:55:52,959 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-04 12:55:52,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:52,960 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-04 12:55:52,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 12:55:52,960 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-04 12:55:52,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 12:55:52,960 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:52,960 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1] [2018-10-04 12:55:52,961 INFO L423 AbstractCegarLoop]: === Iteration 53 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:52,961 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:52,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125127, now seen corresponding path program 52 times [2018-10-04 12:55:52,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:52,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:52,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:52,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:52,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:53,297 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:55:54,007 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:55:54,794 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 12:55:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:54,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:54,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:54,978 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:55:54,995 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:55:54,995 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:54,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:55,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:55,125 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:55,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 12:55:55,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 12:55:55,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 12:55:55,125 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:55,126 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 55 states. [2018-10-04 12:55:56,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:56,817 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-04 12:55:56,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 12:55:56,817 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 54 [2018-10-04 12:55:56,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:56,818 INFO L225 Difference]: With dead ends: 57 [2018-10-04 12:55:56,818 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 12:55:56,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.7s impTime 53 [2018-10-04 12:55:56,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 12:55:56,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-04 12:55:56,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 12:55:56,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-04 12:55:56,822 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-04 12:55:56,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:56,822 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-04 12:55:56,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 12:55:56,823 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-04 12:55:56,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-04 12:55:56,823 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:56,823 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1] [2018-10-04 12:55:56,823 INFO L423 AbstractCegarLoop]: === Iteration 54 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:56,823 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:56,824 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107809, now seen corresponding path program 53 times [2018-10-04 12:55:56,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:56,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:56,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:56,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:56,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:57,222 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:55:57,743 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:55:58,488 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 12:55:58,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:58,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:58,724 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:58,732 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:55:58,769 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-04 12:55:58,769 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:58,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:58,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:58,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 12:55:58,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 12:55:58,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 12:55:58,969 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:58,969 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-10-04 12:56:00,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:00,848 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-04 12:56:00,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 12:56:00,849 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-10-04 12:56:00,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:00,850 INFO L225 Difference]: With dead ends: 58 [2018-10-04 12:56:00,850 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 12:56:00,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.6s impTime 54 [2018-10-04 12:56:00,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 12:56:00,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-04 12:56:00,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-04 12:56:00,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-04 12:56:00,854 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-04 12:56:00,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:00,855 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-04 12:56:00,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 12:56:00,855 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-04 12:56:00,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 12:56:00,855 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:00,855 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1] [2018-10-04 12:56:00,856 INFO L423 AbstractCegarLoop]: === Iteration 55 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:00,856 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:00,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832583, now seen corresponding path program 54 times [2018-10-04 12:56:00,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:00,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:00,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:00,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:56:00,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:00,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:01,151 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:56:01,672 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:56:02,427 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 12:56:02,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:02,725 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:02,725 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:56:02,733 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:56:02,765 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-04 12:56:02,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:56:02,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:02,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:02,899 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:56:02,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 12:56:02,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 12:56:02,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 12:56:02,900 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:02,900 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 57 states. [2018-10-04 12:56:04,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:04,918 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-04 12:56:04,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 12:56:04,919 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 56 [2018-10-04 12:56:04,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:04,920 INFO L225 Difference]: With dead ends: 59 [2018-10-04 12:56:04,920 INFO L226 Difference]: Without dead ends: 58 [2018-10-04 12:56:04,920 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.6s impTime 55 [2018-10-04 12:56:04,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-04 12:56:04,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-04 12:56:04,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-04 12:56:04,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-04 12:56:04,924 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-04 12:56:04,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:04,924 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-04 12:56:04,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 12:56:04,924 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-04 12:56:04,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-04 12:56:04,925 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:04,925 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1] [2018-10-04 12:56:04,925 INFO L423 AbstractCegarLoop]: === Iteration 56 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:04,925 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:04,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895647, now seen corresponding path program 55 times [2018-10-04 12:56:04,925 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:04,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:04,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:04,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:56:04,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:05,301 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:56:05,827 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:56:06,581 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 12:56:06,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:06,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:06,939 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:56:06,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:56:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:06,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:07,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:07,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:56:07,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-04 12:56:07,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 12:56:07,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 12:56:07,109 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:07,110 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-10-04 12:56:09,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:09,040 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-04 12:56:09,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 12:56:09,041 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-10-04 12:56:09,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:09,041 INFO L225 Difference]: With dead ends: 60 [2018-10-04 12:56:09,041 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 12:56:09,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.7s impTime 56 [2018-10-04 12:56:09,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 12:56:09,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 12:56:09,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 12:56:09,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-04 12:56:09,044 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-04 12:56:09,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:09,044 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-04 12:56:09,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 12:56:09,045 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-04 12:56:09,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 12:56:09,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:09,045 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1] [2018-10-04 12:56:09,045 INFO L423 AbstractCegarLoop]: === Iteration 57 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:09,045 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:09,045 INFO L82 PathProgramCache]: Analyzing trace with hash -836059449, now seen corresponding path program 56 times [2018-10-04 12:56:09,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:09,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:09,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:09,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:56:09,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:09,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:09,497 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:56:10,017 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:56:10,770 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 12:56:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:11,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:11,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:56:11,198 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:56:11,217 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:56:11,218 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:56:11,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:11,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:11,355 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:56:11,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 12:56:11,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 12:56:11,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 12:56:11,356 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:11,356 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 59 states. [2018-10-04 12:56:13,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:13,316 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-04 12:56:13,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 12:56:13,317 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 58 [2018-10-04 12:56:13,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:13,317 INFO L225 Difference]: With dead ends: 61 [2018-10-04 12:56:13,318 INFO L226 Difference]: Without dead ends: 60 [2018-10-04 12:56:13,318 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.8s impTime 57 [2018-10-04 12:56:13,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-04 12:56:13,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-04 12:56:13,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-04 12:56:13,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-04 12:56:13,322 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-04 12:56:13,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:13,323 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-04 12:56:13,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 12:56:13,323 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-04 12:56:13,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-04 12:56:13,323 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:13,323 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1] [2018-10-04 12:56:13,324 INFO L423 AbstractCegarLoop]: === Iteration 58 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:13,324 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:13,324 INFO L82 PathProgramCache]: Analyzing trace with hash -148039199, now seen corresponding path program 57 times [2018-10-04 12:56:13,324 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:13,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:13,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:13,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:56:13,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:13,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:13,639 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:56:14,186 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:56:15,040 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 12:56:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:15,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:15,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:56:15,532 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:56:15,568 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-04 12:56:15,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:56:15,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:15,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:16,030 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:56:16,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-04 12:56:16,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 12:56:16,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 12:56:16,031 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:16,031 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-10-04 12:56:18,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:18,185 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-04 12:56:18,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 12:56:18,186 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-10-04 12:56:18,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:18,187 INFO L225 Difference]: With dead ends: 62 [2018-10-04 12:56:18,187 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 12:56:18,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 1.9s impTime 58 [2018-10-04 12:56:18,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 12:56:18,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 12:56:18,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 12:56:18,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-04 12:56:18,192 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-04 12:56:18,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:18,193 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-04 12:56:18,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 12:56:18,193 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-04 12:56:18,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 12:56:18,193 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:18,193 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1] [2018-10-04 12:56:18,194 INFO L423 AbstractCegarLoop]: === Iteration 59 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:18,194 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:18,194 INFO L82 PathProgramCache]: Analyzing trace with hash -294247929, now seen corresponding path program 58 times [2018-10-04 12:56:18,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:18,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:18,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:18,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:56:18,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:18,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:18,918 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:56:19,626 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:56:20,384 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 12:56:20,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:20,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:20,945 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:56:20,955 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:56:20,973 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:56:20,973 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:56:20,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:21,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:21,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:56:21,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-04 12:56:21,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-04 12:56:21,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-04 12:56:21,108 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:21,108 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 61 states. [2018-10-04 12:56:23,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:23,191 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-04 12:56:23,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 12:56:23,191 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 60 [2018-10-04 12:56:23,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:23,192 INFO L225 Difference]: With dead ends: 63 [2018-10-04 12:56:23,192 INFO L226 Difference]: Without dead ends: 62 [2018-10-04 12:56:23,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.3s impTime 59 [2018-10-04 12:56:23,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-04 12:56:23,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-04 12:56:23,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-04 12:56:23,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-04 12:56:23,197 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-10-04 12:56:23,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:23,198 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-04 12:56:23,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-04 12:56:23,198 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-04 12:56:23,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-04 12:56:23,198 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:23,198 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1] [2018-10-04 12:56:23,198 INFO L423 AbstractCegarLoop]: === Iteration 60 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:23,198 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:23,199 INFO L82 PathProgramCache]: Analyzing trace with hash -531751263, now seen corresponding path program 59 times [2018-10-04 12:56:23,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:23,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:23,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:23,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:56:23,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:23,491 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:56:24,023 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:56:24,960 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 12:56:25,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:25,571 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:25,571 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:56:25,579 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:56:25,609 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-04 12:56:25,609 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:56:25,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:25,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:25,765 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:56:25,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-04 12:56:25,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 12:56:25,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 12:56:25,765 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:25,765 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-10-04 12:56:27,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:27,959 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-04 12:56:27,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 12:56:27,959 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-10-04 12:56:27,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:27,960 INFO L225 Difference]: With dead ends: 64 [2018-10-04 12:56:27,960 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 12:56:27,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 2.1s impTime 60 [2018-10-04 12:56:27,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 12:56:27,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-04 12:56:27,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 12:56:27,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-04 12:56:27,964 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-10-04 12:56:27,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:27,965 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-04 12:56:27,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 12:56:27,965 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-04 12:56:27,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 12:56:27,965 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:27,965 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1] [2018-10-04 12:56:27,966 INFO L423 AbstractCegarLoop]: === Iteration 61 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:27,966 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:27,966 INFO L82 PathProgramCache]: Analyzing trace with hash 695579975, now seen corresponding path program 60 times [2018-10-04 12:56:27,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:27,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:27,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:27,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:56:27,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:28,424 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:56:28,938 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:56:29,863 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 12:56:30,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:30,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:30,547 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:56:30,555 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:56:30,587 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-04 12:56:30,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:56:30,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:30,729 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:56:30,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-04 12:56:30,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-04 12:56:30,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-04 12:56:30,730 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:30,730 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 63 states. [2018-10-04 12:56:32,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:32,974 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-04 12:56:32,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 12:56:32,974 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 62 [2018-10-04 12:56:32,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:32,975 INFO L225 Difference]: With dead ends: 65 [2018-10-04 12:56:32,975 INFO L226 Difference]: Without dead ends: 64 [2018-10-04 12:56:32,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.2s impTime 61 [2018-10-04 12:56:32,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-04 12:56:32,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-04 12:56:32,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-04 12:56:32,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-04 12:56:32,978 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-10-04 12:56:32,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:32,979 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-04 12:56:32,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-04 12:56:32,979 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-04 12:56:32,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-04 12:56:32,979 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:32,979 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1] [2018-10-04 12:56:32,979 INFO L423 AbstractCegarLoop]: === Iteration 62 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:32,980 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:32,980 INFO L82 PathProgramCache]: Analyzing trace with hash 88142689, now seen corresponding path program 61 times [2018-10-04 12:56:32,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:32,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:32,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:32,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:56:32,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:33,266 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:56:33,785 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:56:34,537 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 12:56:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:35,493 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:35,494 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 [2018-10-04 12:56:35,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:56:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:35,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:35,661 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:56:35,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-04 12:56:35,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 12:56:35,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 12:56:35,661 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:35,662 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-10-04 12:56:37,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:37,989 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-10-04 12:56:37,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 12:56:37,989 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-10-04 12:56:37,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:37,990 INFO L225 Difference]: With dead ends: 66 [2018-10-04 12:56:37,990 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 12:56:37,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.2s impTime 62 [2018-10-04 12:56:37,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 12:56:37,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-04 12:56:37,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 12:56:37,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-04 12:56:37,994 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-10-04 12:56:37,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:37,994 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-04 12:56:37,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 12:56:37,994 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-04 12:56:37,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-04 12:56:37,995 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:37,995 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1] [2018-10-04 12:56:37,995 INFO L423 AbstractCegarLoop]: === Iteration 63 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:37,995 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:37,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543993, now seen corresponding path program 62 times [2018-10-04 12:56:37,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:37,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:37,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:37,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:56:37,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:38,317 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:56:38,852 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:56:39,598 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 12:56:40,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:40,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:40,616 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:56:40,623 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:56:40,643 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:56:40,644 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:56:40,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:40,792 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:56:40,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-04 12:56:40,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 12:56:40,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 12:56:40,793 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:40,793 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 65 states. [2018-10-04 12:56:43,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:43,222 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-04 12:56:43,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 12:56:43,222 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 64 [2018-10-04 12:56:43,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:43,223 INFO L225 Difference]: With dead ends: 67 [2018-10-04 12:56:43,223 INFO L226 Difference]: Without dead ends: 66 [2018-10-04 12:56:43,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.3s impTime 63 [2018-10-04 12:56:43,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-04 12:56:43,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-04 12:56:43,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-04 12:56:43,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-04 12:56:43,228 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-10-04 12:56:43,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:43,229 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-04 12:56:43,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 12:56:43,229 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-04 12:56:43,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-04 12:56:43,229 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:43,229 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1] [2018-10-04 12:56:43,230 INFO L423 AbstractCegarLoop]: === Iteration 64 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:43,230 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:43,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223583, now seen corresponding path program 63 times [2018-10-04 12:56:43,230 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:43,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:43,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:43,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:56:43,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:43,568 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:56:44,087 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:56:44,836 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 12:56:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:45,968 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:45,968 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:56:45,977 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:56:46,010 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-04 12:56:46,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:56:46,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:46,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:46,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:56:46,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-04 12:56:46,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 12:56:46,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 12:56:46,158 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:46,158 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-10-04 12:56:48,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:48,578 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-10-04 12:56:48,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 12:56:48,578 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-10-04 12:56:48,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:48,579 INFO L225 Difference]: With dead ends: 68 [2018-10-04 12:56:48,579 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 12:56:48,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.4s impTime 64 [2018-10-04 12:56:48,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 12:56:48,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-04 12:56:48,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 12:56:48,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-04 12:56:48,584 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-10-04 12:56:48,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:48,585 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-04 12:56:48,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 12:56:48,585 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-04 12:56:48,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 12:56:48,585 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:48,585 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1] [2018-10-04 12:56:48,586 INFO L423 AbstractCegarLoop]: === Iteration 65 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:48,586 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:48,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774535, now seen corresponding path program 64 times [2018-10-04 12:56:48,586 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:48,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:48,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:48,587 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:56:48,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:49,190 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:56:49,701 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:56:50,622 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 12:56:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:51,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:51,601 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:56:51,610 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:56:51,629 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:56:51,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:56:51,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:51,794 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:56:51,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-04 12:56:51,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-04 12:56:51,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-04 12:56:51,795 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:51,795 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 67 states. [2018-10-04 12:56:54,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:54,510 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-04 12:56:54,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 12:56:54,510 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 66 [2018-10-04 12:56:54,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:54,511 INFO L225 Difference]: With dead ends: 69 [2018-10-04 12:56:54,511 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 12:56:54,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time 2.6s impTime 65 [2018-10-04 12:56:54,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 12:56:54,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-04 12:56:54,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-04 12:56:54,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-04 12:56:54,517 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-10-04 12:56:54,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:54,517 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-04 12:56:54,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-04 12:56:54,518 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-04 12:56:54,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-04 12:56:54,518 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:54,518 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1] [2018-10-04 12:56:54,518 INFO L423 AbstractCegarLoop]: === Iteration 66 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:54,519 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:54,519 INFO L82 PathProgramCache]: Analyzing trace with hash -892597023, now seen corresponding path program 65 times [2018-10-04 12:56:54,519 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:54,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:54,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:54,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:56:54,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:54,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:54,807 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:56:55,566 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:56:56,436 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 12:56:57,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:57,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:57,504 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:56:57,513 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:56:57,545 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-04 12:56:57,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:56:57,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:57,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:57,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:56:57,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-04 12:56:57,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 12:56:57,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 12:56:57,700 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:57,700 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-10-04 12:57:00,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:57:00,528 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-04 12:57:00,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 12:57:00,529 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-10-04 12:57:00,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:57:00,529 INFO L225 Difference]: With dead ends: 70 [2018-10-04 12:57:00,530 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 12:57:00,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time 2.6s impTime 66 [2018-10-04 12:57:00,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 12:57:00,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-04 12:57:00,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-04 12:57:00,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-04 12:57:00,533 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-10-04 12:57:00,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:57:00,534 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-04 12:57:00,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 12:57:00,534 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-04 12:57:00,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 12:57:00,534 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:57:00,535 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1] [2018-10-04 12:57:00,535 INFO L423 AbstractCegarLoop]: === Iteration 67 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:57:00,535 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:57:00,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703993, now seen corresponding path program 66 times [2018-10-04 12:57:00,535 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:57:00,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:57:00,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:00,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:57:00,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:57:00,840 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:57:01,421 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:57:02,233 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 12:57:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:03,361 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:57:03,361 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:57:03,367 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:57:03,401 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-10-04 12:57:03,401 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:57:03,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:57:03,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:03,570 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:57:03,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-04 12:57:03,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-04 12:57:03,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-04 12:57:03,571 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:57:03,571 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 69 states. [2018-10-04 12:57:06,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:57:06,541 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-04 12:57:06,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 12:57:06,541 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 68 [2018-10-04 12:57:06,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:57:06,542 INFO L225 Difference]: With dead ends: 71 [2018-10-04 12:57:06,542 INFO L226 Difference]: Without dead ends: 70 [2018-10-04 12:57:06,542 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time 2.5s impTime 67 [2018-10-04 12:57:06,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-04 12:57:06,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-04 12:57:06,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-04 12:57:06,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-04 12:57:06,546 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-10-04 12:57:06,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:57:06,546 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-04 12:57:06,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-04 12:57:06,546 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-04 12:57:06,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-04 12:57:06,547 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:57:06,547 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1] [2018-10-04 12:57:06,547 INFO L423 AbstractCegarLoop]: === Iteration 68 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:57:06,547 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:57:06,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718305, now seen corresponding path program 67 times [2018-10-04 12:57:06,548 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:57:06,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:57:06,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:06,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:57:06,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:57:06,934 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:57:07,467 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:57:08,221 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 12:57:09,467 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 68 new depth: 68 [2018-10-04 12:57:09,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:09,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:57:09,476 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:57:09,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:57:09,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:57:09,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:57:09,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:09,670 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:57:09,670 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-04 12:57:09,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 12:57:09,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 12:57:09,671 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:57:09,671 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-10-04 12:57:12,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:57:12,633 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-10-04 12:57:12,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 12:57:12,633 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-10-04 12:57:12,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:57:12,634 INFO L225 Difference]: With dead ends: 72 [2018-10-04 12:57:12,634 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 12:57:12,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time 2.5s impTime 68 [2018-10-04 12:57:12,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 12:57:12,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-04 12:57:12,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-04 12:57:12,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-04 12:57:12,638 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-10-04 12:57:12,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:57:12,638 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-04 12:57:12,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 12:57:12,638 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-04 12:57:12,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-04 12:57:12,639 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:57:12,639 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1] [2018-10-04 12:57:12,639 INFO L423 AbstractCegarLoop]: === Iteration 69 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:57:12,639 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:57:12,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438265, now seen corresponding path program 68 times [2018-10-04 12:57:12,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:57:12,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:57:12,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:12,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:57:12,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:12,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:57:12,960 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:57:13,533 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:57:14,278 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 12:57:15,530 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 68 new depth: 68 [2018-10-04 12:57:15,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:15,673 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:57:15,673 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:57:15,680 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:57:15,702 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:57:15,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:57:15,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:57:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:15,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:57:15,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-04 12:57:15,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 12:57:15,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 12:57:15,958 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:57:15,958 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 71 states. [2018-10-04 12:57:18,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:57:18,842 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-04 12:57:18,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 12:57:18,843 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 70 [2018-10-04 12:57:18,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:57:18,844 INFO L225 Difference]: With dead ends: 73 [2018-10-04 12:57:18,844 INFO L226 Difference]: Without dead ends: 72 [2018-10-04 12:57:18,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s Time 2.6s impTime 69 [2018-10-04 12:57:18,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-04 12:57:18,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-04 12:57:18,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-04 12:57:18,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-04 12:57:18,848 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-10-04 12:57:18,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:57:18,849 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-04 12:57:18,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 12:57:18,849 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-04 12:57:18,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-04 12:57:18,849 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:57:18,849 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1] [2018-10-04 12:57:18,849 INFO L423 AbstractCegarLoop]: === Iteration 70 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:57:18,849 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:57:18,850 INFO L82 PathProgramCache]: Analyzing trace with hash 976119393, now seen corresponding path program 69 times [2018-10-04 12:57:18,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:57:18,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:57:18,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:18,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:57:18,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:18,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:57:19,153 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:57:19,667 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:57:20,447 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 12:57:21,854 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 68 new depth: 68 [2018-10-04 12:57:22,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:22,021 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:57:22,021 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:57:22,029 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:57:22,065 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-04 12:57:22,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:57:22,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:57:22,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:22,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:57:22,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-04 12:57:22,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 12:57:22,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 12:57:22,237 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:57:22,237 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-10-04 12:57:25,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:57:25,276 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-04 12:57:25,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 12:57:25,277 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-10-04 12:57:25,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:57:25,278 INFO L225 Difference]: With dead ends: 74 [2018-10-04 12:57:25,278 INFO L226 Difference]: Without dead ends: 73 [2018-10-04 12:57:25,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s Time 2.8s impTime 70 [2018-10-04 12:57:25,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-04 12:57:25,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-04 12:57:25,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-04 12:57:25,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-04 12:57:25,283 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-10-04 12:57:25,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:57:25,283 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-04 12:57:25,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 12:57:25,284 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-04 12:57:25,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 12:57:25,284 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:57:25,284 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1] [2018-10-04 12:57:25,284 INFO L423 AbstractCegarLoop]: === Iteration 71 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:57:25,284 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:57:25,285 INFO L82 PathProgramCache]: Analyzing trace with hash 194930055, now seen corresponding path program 70 times [2018-10-04 12:57:25,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:57:25,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:57:25,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:25,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:57:25,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:25,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:57:25,576 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:57:26,284 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:57:27,040 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 12:57:28,289 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 68 new depth: 68 [2018-10-04 12:57:28,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:28,523 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:57:28,523 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:57:28,530 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:57:28,556 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:57:28,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:57:28,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:57:28,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:28,725 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:57:28,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-04 12:57:28,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-04 12:57:28,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-04 12:57:28,725 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:57:28,726 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 73 states. [2018-10-04 12:57:32,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:57:32,709 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-04 12:57:32,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 12:57:32,710 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 72 [2018-10-04 12:57:32,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:57:32,711 INFO L225 Difference]: With dead ends: 75 [2018-10-04 12:57:32,711 INFO L226 Difference]: Without dead ends: 74 [2018-10-04 12:57:32,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time 2.8s impTime 71 [2018-10-04 12:57:32,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-04 12:57:32,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-04 12:57:32,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-04 12:57:32,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-04 12:57:32,717 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-10-04 12:57:32,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:57:32,717 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-04 12:57:32,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-04 12:57:32,717 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-04 12:57:32,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-04 12:57:32,718 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:57:32,718 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1] [2018-10-04 12:57:32,718 INFO L423 AbstractCegarLoop]: === Iteration 72 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:57:32,718 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:57:32,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864353, now seen corresponding path program 71 times [2018-10-04 12:57:32,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:57:32,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:57:32,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:32,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:57:32,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:32,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:57:33,018 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:57:33,521 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:57:34,270 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 12:57:35,484 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 68 new depth: 68 [2018-10-04 12:57:35,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:35,795 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:57:35,796 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:57:35,805 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:57:36,259 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-04 12:57:36,259 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:57:36,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:57:36,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:36,784 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:57:36,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-04 12:57:36,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 12:57:36,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 12:57:36,785 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:57:36,785 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-10-04 12:57:39,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:57:39,985 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-04 12:57:39,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 12:57:39,985 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-10-04 12:57:39,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:57:39,986 INFO L225 Difference]: With dead ends: 76 [2018-10-04 12:57:39,987 INFO L226 Difference]: Without dead ends: 75 [2018-10-04 12:57:39,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s Time 2.7s impTime 72 [2018-10-04 12:57:39,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-04 12:57:39,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-04 12:57:39,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 12:57:39,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-04 12:57:39,992 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-10-04 12:57:39,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:57:39,992 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-04 12:57:39,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 12:57:39,992 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-04 12:57:39,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 12:57:39,993 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:57:39,993 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1] [2018-10-04 12:57:39,993 INFO L423 AbstractCegarLoop]: === Iteration 73 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:57:39,993 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:57:39,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779961, now seen corresponding path program 72 times [2018-10-04 12:57:39,994 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:57:39,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:57:39,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:39,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:57:39,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:40,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:57:41,664 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:57:42,175 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:57:42,931 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 12:57:44,154 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 68 new depth: 68 [2018-10-04 12:57:44,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:44,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:57:44,557 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:57:44,563 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:57:44,624 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-04 12:57:44,624 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:57:44,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:57:44,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:44,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:57:44,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-04 12:57:44,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-04 12:57:44,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-04 12:57:44,991 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:57:44,991 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 75 states. [2018-10-04 12:57:48,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:57:48,426 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-04 12:57:48,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 12:57:48,427 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 74 [2018-10-04 12:57:48,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:57:48,428 INFO L225 Difference]: With dead ends: 77 [2018-10-04 12:57:48,428 INFO L226 Difference]: Without dead ends: 76 [2018-10-04 12:57:48,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s Time 3.9s impTime 73 [2018-10-04 12:57:48,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-04 12:57:48,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-04 12:57:48,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-04 12:57:48,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-04 12:57:48,433 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-10-04 12:57:48,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:57:48,433 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-04 12:57:48,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-04 12:57:48,434 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-04 12:57:48,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-04 12:57:48,434 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:57:48,434 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1] [2018-10-04 12:57:48,434 INFO L423 AbstractCegarLoop]: === Iteration 74 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:57:48,435 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:57:48,435 INFO L82 PathProgramCache]: Analyzing trace with hash 365428705, now seen corresponding path program 73 times [2018-10-04 12:57:48,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:57:48,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:57:48,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:48,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:57:48,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:57:49,366 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:57:49,897 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:57:50,630 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 12:57:52,065 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 68 new depth: 68 [2018-10-04 12:57:52,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:52,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:57:52,539 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:57:52,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:57:52,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:57:52,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:57:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:52,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:57:52,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-04 12:57:52,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 12:57:52,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 12:57:52,886 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:57:52,886 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-10-04 12:57:56,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:57:56,196 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-10-04 12:57:56,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-04 12:57:56,197 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-10-04 12:57:56,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:57:56,198 INFO L225 Difference]: With dead ends: 78 [2018-10-04 12:57:56,198 INFO L226 Difference]: Without dead ends: 77 [2018-10-04 12:57:56,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s Time 3.5s impTime 74 [2018-10-04 12:57:56,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-04 12:57:56,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-04 12:57:56,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-04 12:57:56,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-04 12:57:56,203 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-10-04 12:57:56,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:57:56,204 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-04 12:57:56,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-04 12:57:56,204 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-04 12:57:56,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-04 12:57:56,204 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:57:56,204 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1] [2018-10-04 12:57:56,205 INFO L423 AbstractCegarLoop]: === Iteration 75 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:57:56,205 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:57:56,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1556612089, now seen corresponding path program 74 times [2018-10-04 12:57:56,205 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:57:56,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:57:56,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:56,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:57:56,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:57:58,442 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:57:58,977 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:57:59,764 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 12:58:00,993 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 68 new depth: 68 [2018-10-04 12:58:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:01,534 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:01,534 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:01,542 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:58:01,565 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:58:01,565 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:01,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:01,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:01,821 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:01,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-04 12:58:01,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 12:58:01,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 12:58:01,822 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:01,822 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 77 states. [2018-10-04 12:58:05,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:05,288 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-04 12:58:05,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 12:58:05,288 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 76 [2018-10-04 12:58:05,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:05,289 INFO L225 Difference]: With dead ends: 79 [2018-10-04 12:58:05,289 INFO L226 Difference]: Without dead ends: 78 [2018-10-04 12:58:05,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4s Time 4.6s impTime 75 [2018-10-04 12:58:05,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-04 12:58:05,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-04 12:58:05,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-04 12:58:05,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-04 12:58:05,294 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-10-04 12:58:05,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:05,294 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-04 12:58:05,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 12:58:05,294 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-04 12:58:05,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-04 12:58:05,295 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:05,295 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1] [2018-10-04 12:58:05,295 INFO L423 AbstractCegarLoop]: === Iteration 76 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:05,295 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:05,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334559, now seen corresponding path program 75 times [2018-10-04 12:58:05,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:05,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:05,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:05,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:05,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:05,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:05,572 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:58:06,075 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:58:06,901 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 12:58:08,310 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 68 new depth: 68 [2018-10-04 12:58:08,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:08,932 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:08,932 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:08,939 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:58:08,978 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-04 12:58:08,978 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:08,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:09,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:09,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:09,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-04 12:58:09,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 12:58:09,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 12:58:09,158 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:09,158 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-10-04 12:58:12,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:12,726 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-10-04 12:58:12,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-04 12:58:12,727 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-10-04 12:58:12,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:12,728 INFO L225 Difference]: With dead ends: 80 [2018-10-04 12:58:12,728 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 12:58:12,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s Time 3.2s impTime 76 [2018-10-04 12:58:12,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 12:58:12,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-04 12:58:12,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-04 12:58:12,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-04 12:58:12,733 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-10-04 12:58:12,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:12,734 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-04 12:58:12,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 12:58:12,734 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-04 12:58:12,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 12:58:12,734 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:12,735 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1] [2018-10-04 12:58:12,735 INFO L423 AbstractCegarLoop]: === Iteration 77 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:12,735 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:12,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600313, now seen corresponding path program 76 times [2018-10-04 12:58:12,735 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:12,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:12,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:12,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:12,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:13,808 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:58:14,311 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:58:15,050 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 12:58:16,287 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 68 new depth: 68 [2018-10-04 12:58:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:16,998 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:16,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:17,007 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:58:17,030 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:58:17,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:17,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:17,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:17,316 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:17,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-04 12:58:17,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-04 12:58:17,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-04 12:58:17,317 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:17,317 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 79 states. [2018-10-04 12:58:20,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:20,863 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-04 12:58:20,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-04 12:58:20,864 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 78 [2018-10-04 12:58:20,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:20,864 INFO L225 Difference]: With dead ends: 81 [2018-10-04 12:58:20,865 INFO L226 Difference]: Without dead ends: 80 [2018-10-04 12:58:20,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s Time 3.7s impTime 77 [2018-10-04 12:58:20,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-04 12:58:20,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-04 12:58:20,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-04 12:58:20,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-04 12:58:20,869 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-10-04 12:58:20,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:20,869 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-04 12:58:20,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-04 12:58:20,869 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-04 12:58:20,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-04 12:58:20,869 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:20,869 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1] [2018-10-04 12:58:20,870 INFO L423 AbstractCegarLoop]: === Iteration 78 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:20,870 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:20,870 INFO L82 PathProgramCache]: Analyzing trace with hash -268904095, now seen corresponding path program 77 times [2018-10-04 12:58:20,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:20,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:20,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:20,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:20,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:20,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:21,149 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:58:21,654 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:58:22,612 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 12:58:23,856 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 68 new depth: 68 [2018-10-04 12:58:24,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:24,644 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:24,644 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:24,652 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:58:24,693 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-04 12:58:24,694 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:24,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:24,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:24,967 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:24,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-04 12:58:24,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 12:58:24,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 12:58:24,967 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:24,967 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-10-04 12:58:28,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:28,796 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-04 12:58:28,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-04 12:58:28,797 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-10-04 12:58:28,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:28,798 INFO L225 Difference]: With dead ends: 82 [2018-10-04 12:58:28,798 INFO L226 Difference]: Without dead ends: 81 [2018-10-04 12:58:28,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s Time 3.4s impTime 78 [2018-10-04 12:58:28,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-04 12:58:28,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-04 12:58:28,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-04 12:58:28,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-04 12:58:28,803 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-10-04 12:58:28,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:28,803 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-04 12:58:28,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 12:58:28,803 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-04 12:58:28,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 12:58:28,804 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:28,804 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1] [2018-10-04 12:58:28,804 INFO L423 AbstractCegarLoop]: === Iteration 79 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:28,804 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:28,805 INFO L82 PathProgramCache]: Analyzing trace with hash 253907591, now seen corresponding path program 78 times [2018-10-04 12:58:28,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:28,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:28,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:28,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:28,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-04 12:58:28,979 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 12:58:28,983 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 12:58:28,983 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 12:58:28 BoogieIcfgContainer [2018-10-04 12:58:28,983 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 12:58:28,984 INFO L168 Benchmark]: Toolchain (without parser) took 243167.01 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -95.9 MB). Free memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: 456.0 MB). Peak memory consumption was 360.1 MB. Max. memory is 7.1 GB. [2018-10-04 12:58:28,985 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 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. [2018-10-04 12:58:28,986 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.50 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. [2018-10-04 12:58:28,986 INFO L168 Benchmark]: Boogie Preprocessor took 22.50 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. [2018-10-04 12:58:28,987 INFO L168 Benchmark]: RCFGBuilder took 195.86 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 12:58:28,987 INFO L168 Benchmark]: TraceAbstraction took 242899.92 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -95.9 MB). Free memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: 434.9 MB). Peak memory consumption was 338.9 MB. Max. memory is 7.1 GB. [2018-10-04 12:58:28,991 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 0.22 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 44.50 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 22.50 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 195.86 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 242899.92 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -95.9 MB). Free memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: 434.9 MB). Peak memory consumption was 338.9 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 81 with TraceHistMax 78, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while NestedInterpolantsBuilder was constructing predicates for 79 interpolants. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. TIMEOUT Result, 242.8s OverallTime, 79 OverallIterations, 78 TraceHistogramMax, 106.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 157 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 167403 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 87.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6161 GetRequests, 3003 SyntacticMatches, 77 SemanticMatches, 3081 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 127.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=78, 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, 78 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 130.7s InterpolantComputationTime, 6316 NumberOfCodeBlocks, 6316 NumberOfCodeBlocksAsserted, 935 NumberOfCheckSat, 6161 ConstructedInterpolants, 0 QuantifiedInterpolants, 2257339 SizeOfPredicates, 0 NumberOfNonLiveVariables, 6391 ConjunctsInSsa, 6237 ConjunctsInUnsatCore, 155 InterpolantComputations, 1 PerfectInterpolantSequences, 0/158158 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_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_12-58-29-001.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/DivisibilityInterpolantRequired01-BackwardSuccess.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_12-58-29-001.csv Completed graceful shutdown