java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/down.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f-m [2018-10-04 14:27:44,464 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 14:27:44,466 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 14:27:44,478 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 14:27:44,478 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 14:27:44,479 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 14:27:44,480 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 14:27:44,482 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 14:27:44,483 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 14:27:44,484 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 14:27:44,485 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-04 14:27:44,528 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 14:27:44,559 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 14:27:44,561 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 14:27:44,562 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 14:27:44,562 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 14:27:44,562 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 14:27:44,564 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 14:27:44,564 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 14:27:44,564 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 14:27:44,564 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 14:27:44,565 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 14:27:44,565 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 14:27:44,565 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 14:27:44,565 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 14:27:44,565 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 14:27:44,566 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 14:27:44,566 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 14:27:44,566 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 14:27:44,567 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 14:27:44,567 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 14:27:44,567 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 14:27:44,567 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 14:27:44,567 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 14:27:44,568 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 14:27:44,568 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 14:27:44,568 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 14:27:44,568 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 14:27:44,568 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 14:27:44,569 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 14:27:44,570 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 14:27:44,570 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 14:27:44,571 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 14:27:44,639 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 14:27:44,654 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 14:27:44,660 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 14:27:44,662 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 14:27:44,662 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 14:27:44,663 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/down.i_4.bpl [2018-10-04 14:27:44,664 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/down.i_4.bpl' [2018-10-04 14:27:44,724 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 14:27:44,725 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 14:27:44,726 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 14:27:44,726 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 14:27:44,727 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 14:27:44,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:27:44" (1/1) ... [2018-10-04 14:27:44,759 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:27:44" (1/1) ... [2018-10-04 14:27:44,767 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 14:27:44,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 14:27:44,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 14:27:44,768 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 14:27:44,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:27:44" (1/1) ... [2018-10-04 14:27:44,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:27:44" (1/1) ... [2018-10-04 14:27:44,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:27:44" (1/1) ... [2018-10-04 14:27:44,781 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:27:44" (1/1) ... [2018-10-04 14:27:44,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:27:44" (1/1) ... [2018-10-04 14:27:44,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:27:44" (1/1) ... [2018-10-04 14:27:44,787 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:27:44" (1/1) ... [2018-10-04 14:27:44,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 14:27:44,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 14:27:44,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 14:27:44,790 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 14:27:44,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:27:44" (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 14:27:44,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 14:27:44,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 14:27:45,163 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 14:27:45,164 INFO L202 PluginConnector]: Adding new model down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 02:27:45 BoogieIcfgContainer [2018-10-04 14:27:45,164 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 14:27:45,165 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 14:27:45,165 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 14:27:45,168 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 14:27:45,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:27:44" (1/2) ... [2018-10-04 14:27:45,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2566c79d and model type down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 02:27:45, skipping insertion in model container [2018-10-04 14:27:45,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 02:27:45" (2/2) ... [2018-10-04 14:27:45,172 INFO L112 eAbstractionObserver]: Analyzing ICFG down.i_4.bpl [2018-10-04 14:27:45,182 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 14:27:45,190 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 14:27:45,241 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 14:27:45,242 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 14:27:45,242 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 14:27:45,243 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 14:27:45,243 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 14:27:45,243 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 14:27:45,243 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 14:27:45,243 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 14:27:45,244 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 14:27:45,259 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-10-04 14:27:45,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 14:27:45,274 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:45,276 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-04 14:27:45,278 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:45,286 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:45,286 INFO L82 PathProgramCache]: Analyzing trace with hash 889539593, now seen corresponding path program 1 times [2018-10-04 14:27:45,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:45,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:45,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:45,345 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:27:45,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:45,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:45,551 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 14:27:45,554 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 14:27:45,555 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 14:27:45,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 14:27:45,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 14:27:45,578 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:45,581 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2018-10-04 14:27:45,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:45,724 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2018-10-04 14:27:45,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 14:27:45,726 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-04 14:27:45,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:45,737 INFO L225 Difference]: With dead ends: 16 [2018-10-04 14:27:45,737 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 14:27:45,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.1s impTime 3 [2018-10-04 14:27:45,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 14:27:45,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 14:27:45,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 14:27:45,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-04 14:27:45,771 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-10-04 14:27:45,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:45,771 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-04 14:27:45,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 14:27:45,771 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-04 14:27:45,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 14:27:45,772 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:45,772 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-04 14:27:45,772 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:45,772 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:45,773 INFO L82 PathProgramCache]: Analyzing trace with hash 198622019, now seen corresponding path program 1 times [2018-10-04 14:27:45,773 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:45,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:45,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:45,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:27:45,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:45,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:45,859 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 14:27:45,859 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-04 14:27:45,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 14:27:45,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 14:27:45,861 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:45,862 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-10-04 14:27:45,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:45,989 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-10-04 14:27:45,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 14:27:45,989 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-04 14:27:45,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:45,990 INFO L225 Difference]: With dead ends: 17 [2018-10-04 14:27:45,990 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 14:27:45,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 4 [2018-10-04 14:27:45,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 14:27:45,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 11. [2018-10-04 14:27:45,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 14:27:45,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-04 14:27:45,995 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-10-04 14:27:45,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:45,995 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-04 14:27:45,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 14:27:45,996 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-04 14:27:45,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 14:27:45,996 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:45,997 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-10-04 14:27:45,997 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:45,997 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:45,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1897132479, now seen corresponding path program 1 times [2018-10-04 14:27:45,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:45,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:45,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:45,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:27:45,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:46,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:46,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:46,126 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 14:27:46,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:27:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:46,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:46,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:46,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:46,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 14:27:46,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 14:27:46,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 14:27:46,312 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:46,312 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2018-10-04 14:27:46,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:46,626 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-10-04 14:27:46,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 14:27:46,627 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-04 14:27:46,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:46,628 INFO L225 Difference]: With dead ends: 20 [2018-10-04 14:27:46,628 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 14:27:46,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 6 [2018-10-04 14:27:46,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 14:27:46,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 14:27:46,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 14:27:46,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-04 14:27:46,633 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-10-04 14:27:46,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:46,634 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-04 14:27:46,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 14:27:46,634 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-04 14:27:46,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 14:27:46,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:46,635 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2018-10-04 14:27:46,635 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:46,636 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:46,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1765329927, now seen corresponding path program 2 times [2018-10-04 14:27:46,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:46,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:46,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:46,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:27:46,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:46,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:46,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:46,794 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 14:27:46,812 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:27:46,846 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:27:46,847 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:27:46,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:46,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:46,972 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:46,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2018-10-04 14:27:46,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 14:27:46,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 14:27:46,974 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:46,975 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-10-04 14:27:47,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:47,172 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-10-04 14:27:47,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 14:27:47,173 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2018-10-04 14:27:47,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:47,174 INFO L225 Difference]: With dead ends: 21 [2018-10-04 14:27:47,174 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 14:27:47,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 7 [2018-10-04 14:27:47,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 14:27:47,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-10-04 14:27:47,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 14:27:47,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-04 14:27:47,179 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2018-10-04 14:27:47,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:47,180 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-04 14:27:47,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 14:27:47,180 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-04 14:27:47,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 14:27:47,180 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:47,181 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-10-04 14:27:47,181 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:47,181 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:47,181 INFO L82 PathProgramCache]: Analyzing trace with hash 29955317, now seen corresponding path program 3 times [2018-10-04 14:27:47,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:47,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:47,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:47,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:27:47,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:47,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:47,385 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:47,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:47,385 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 14:27:47,395 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:27:47,413 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-04 14:27:47,413 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:27:47,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:47,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:47,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:47,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 14:27:47,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 14:27:47,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 14:27:47,489 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:47,490 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-10-04 14:27:47,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:47,985 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-10-04 14:27:47,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 14:27:47,989 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-04 14:27:47,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:47,990 INFO L225 Difference]: With dead ends: 26 [2018-10-04 14:27:47,990 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 14:27:47,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 7 [2018-10-04 14:27:47,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 14:27:47,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 14:27:47,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 14:27:47,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-04 14:27:47,995 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2018-10-04 14:27:47,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:47,996 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-04 14:27:47,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 14:27:47,996 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-04 14:27:47,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 14:27:47,997 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:47,997 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1] [2018-10-04 14:27:47,997 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:47,998 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:47,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1153652177, now seen corresponding path program 4 times [2018-10-04 14:27:47,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:47,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:47,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:47,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:27:47,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:48,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:48,129 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:48,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:48,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:27:48,140 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:27:48,160 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:27:48,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:27:48,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:48,276 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:48,297 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:48,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-10-04 14:27:48,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 14:27:48,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 14:27:48,298 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:48,298 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-10-04 14:27:48,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:48,442 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-04 14:27:48,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 14:27:48,444 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-04 14:27:48,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:48,445 INFO L225 Difference]: With dead ends: 25 [2018-10-04 14:27:48,445 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 14:27:48,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 9 [2018-10-04 14:27:48,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 14:27:48,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-10-04 14:27:48,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 14:27:48,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-10-04 14:27:48,453 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2018-10-04 14:27:48,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:48,454 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-10-04 14:27:48,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 14:27:48,454 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-10-04 14:27:48,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 14:27:48,456 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:48,456 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-10-04 14:27:48,456 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:48,457 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:48,457 INFO L82 PathProgramCache]: Analyzing trace with hash -558246485, now seen corresponding path program 5 times [2018-10-04 14:27:48,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:48,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:48,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:48,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:27:48,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:48,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:48,616 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:48,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:48,616 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:27:48,626 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:27:48,643 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-04 14:27:48,644 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:27:48,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:48,855 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:48,878 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:48,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 14:27:48,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 14:27:48,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 14:27:48,879 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:48,879 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2018-10-04 14:27:49,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:49,005 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-10-04 14:27:49,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 14:27:49,006 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-04 14:27:49,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:49,006 INFO L225 Difference]: With dead ends: 32 [2018-10-04 14:27:49,007 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 14:27:49,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.0s impTime 9 [2018-10-04 14:27:49,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 14:27:49,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 14:27:49,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 14:27:49,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-04 14:27:49,012 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-10-04 14:27:49,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:49,012 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-04 14:27:49,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 14:27:49,013 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-04 14:27:49,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 14:27:49,013 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:49,013 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1] [2018-10-04 14:27:49,014 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:49,014 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:49,014 INFO L82 PathProgramCache]: Analyzing trace with hash -578011675, now seen corresponding path program 6 times [2018-10-04 14:27:49,014 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:49,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:49,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:49,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:27:49,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:49,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:49,139 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:49,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:49,140 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 14:27:49,157 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:27:49,183 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-04 14:27:49,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:27:49,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:49,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:49,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-10-04 14:27:49,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 14:27:49,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 14:27:49,324 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:49,324 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-10-04 14:27:49,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:49,556 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-10-04 14:27:49,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 14:27:49,557 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-10-04 14:27:49,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:49,557 INFO L225 Difference]: With dead ends: 29 [2018-10-04 14:27:49,558 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 14:27:49,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 11 [2018-10-04 14:27:49,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 14:27:49,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2018-10-04 14:27:49,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 14:27:49,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-10-04 14:27:49,564 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2018-10-04 14:27:49,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:49,565 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-10-04 14:27:49,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 14:27:49,565 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-10-04 14:27:49,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 14:27:49,566 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:49,566 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2018-10-04 14:27:49,566 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:49,566 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:49,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1418505247, now seen corresponding path program 7 times [2018-10-04 14:27:49,566 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:49,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:49,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:49,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:27:49,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:49,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:49,765 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:49,765 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:49,765 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 14:27:49,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:27:49,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:49,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:49,892 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:49,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 14:27:49,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 14:27:49,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 14:27:49,893 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:49,894 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2018-10-04 14:27:50,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:50,013 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-10-04 14:27:50,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 14:27:50,013 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-04 14:27:50,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:50,014 INFO L225 Difference]: With dead ends: 38 [2018-10-04 14:27:50,014 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 14:27:50,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 11 [2018-10-04 14:27:50,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 14:27:50,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 14:27:50,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 14:27:50,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-04 14:27:50,021 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2018-10-04 14:27:50,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:50,021 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-04 14:27:50,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 14:27:50,022 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-04 14:27:50,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 14:27:50,022 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:50,023 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1] [2018-10-04 14:27:50,023 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:50,023 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:50,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1375531237, now seen corresponding path program 8 times [2018-10-04 14:27:50,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:50,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:50,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:50,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:27:50,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:50,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:50,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:50,149 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 14:27:50,162 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:27:50,202 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:27:50,203 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:27:50,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:50,302 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:50,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:50,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-10-04 14:27:50,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 14:27:50,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 14:27:50,325 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:50,325 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2018-10-04 14:27:50,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:50,702 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-10-04 14:27:50,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 14:27:50,704 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2018-10-04 14:27:50,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:50,704 INFO L225 Difference]: With dead ends: 33 [2018-10-04 14:27:50,705 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 14:27:50,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 13 [2018-10-04 14:27:50,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 14:27:50,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2018-10-04 14:27:50,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 14:27:50,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-04 14:27:50,711 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-10-04 14:27:50,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:50,712 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-04 14:27:50,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 14:27:50,712 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-04 14:27:50,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 14:27:50,713 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:50,713 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-10-04 14:27:50,714 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:50,714 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:50,714 INFO L82 PathProgramCache]: Analyzing trace with hash 964341655, now seen corresponding path program 9 times [2018-10-04 14:27:50,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:50,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:50,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:50,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:27:50,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:50,883 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:50,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:50,883 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 14:27:50,891 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:27:50,914 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 14:27:50,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:27:50,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:50,989 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:51,019 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:51,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 14:27:51,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 14:27:51,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 14:27:51,020 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:51,020 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2018-10-04 14:27:51,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:51,267 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-10-04 14:27:51,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 14:27:51,268 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-04 14:27:51,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:51,268 INFO L225 Difference]: With dead ends: 44 [2018-10-04 14:27:51,268 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 14:27:51,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 13 [2018-10-04 14:27:51,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 14:27:51,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 14:27:51,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 14:27:51,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-10-04 14:27:51,275 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-10-04 14:27:51,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:51,276 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-10-04 14:27:51,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 14:27:51,276 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-10-04 14:27:51,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 14:27:51,277 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:51,277 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1] [2018-10-04 14:27:51,278 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:51,278 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:51,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1427751471, now seen corresponding path program 10 times [2018-10-04 14:27:51,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:51,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:51,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:51,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:27:51,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:51,664 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:51,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:51,664 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 14:27:51,674 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:27:51,698 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:27:51,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:27:51,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:51,821 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:51,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:51,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-10-04 14:27:51,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 14:27:51,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 14:27:51,842 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:51,843 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2018-10-04 14:27:52,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:52,456 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-10-04 14:27:52,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 14:27:52,456 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-10-04 14:27:52,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:52,457 INFO L225 Difference]: With dead ends: 37 [2018-10-04 14:27:52,458 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 14:27:52,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.4s impTime 15 [2018-10-04 14:27:52,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 14:27:52,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2018-10-04 14:27:52,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 14:27:52,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-10-04 14:27:52,466 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2018-10-04 14:27:52,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:52,466 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-10-04 14:27:52,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 14:27:52,467 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-10-04 14:27:52,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 14:27:52,467 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:52,467 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2018-10-04 14:27:52,468 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:52,468 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:52,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1974662963, now seen corresponding path program 11 times [2018-10-04 14:27:52,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:52,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:52,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:52,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:27:52,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:52,700 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:52,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:52,701 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 14:27:52,709 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:27:52,747 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 14:27:52,747 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:27:52,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:52,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:52,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 14:27:52,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 14:27:52,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 14:27:52,878 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:52,879 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2018-10-04 14:27:53,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:53,271 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-10-04 14:27:53,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 14:27:53,271 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-04 14:27:53,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:53,272 INFO L225 Difference]: With dead ends: 50 [2018-10-04 14:27:53,272 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 14:27:53,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 15 [2018-10-04 14:27:53,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 14:27:53,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 14:27:53,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 14:27:53,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-04 14:27:53,278 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2018-10-04 14:27:53,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:53,278 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-04 14:27:53,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 14:27:53,279 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-04 14:27:53,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 14:27:53,279 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:53,279 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1] [2018-10-04 14:27:53,280 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:53,280 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:53,280 INFO L82 PathProgramCache]: Analyzing trace with hash 577956359, now seen corresponding path program 12 times [2018-10-04 14:27:53,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:53,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:53,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:53,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:27:53,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:53,514 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:53,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:53,515 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:27:53,525 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:27:53,566 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 14:27:53,566 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:27:53,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:53,655 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:53,675 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:53,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-10-04 14:27:53,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 14:27:53,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 14:27:53,676 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:53,676 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2018-10-04 14:27:53,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:53,825 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-10-04 14:27:53,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 14:27:53,825 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2018-10-04 14:27:53,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:53,826 INFO L225 Difference]: With dead ends: 41 [2018-10-04 14:27:53,827 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 14:27:53,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 17 [2018-10-04 14:27:53,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 14:27:53,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-10-04 14:27:53,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 14:27:53,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-10-04 14:27:53,834 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-10-04 14:27:53,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:53,834 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-10-04 14:27:53,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 14:27:53,835 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-10-04 14:27:53,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 14:27:53,835 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:53,835 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-10-04 14:27:53,836 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:53,836 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:53,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1365213059, now seen corresponding path program 13 times [2018-10-04 14:27:53,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:53,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:53,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:53,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:27:53,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:53,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:54,007 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:54,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:54,007 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 14:27:54,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:27:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:54,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:54,255 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:54,277 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:54,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 14:27:54,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 14:27:54,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 14:27:54,278 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:54,278 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 18 states. [2018-10-04 14:27:54,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:54,887 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-10-04 14:27:54,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 14:27:54,888 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-04 14:27:54,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:54,888 INFO L225 Difference]: With dead ends: 56 [2018-10-04 14:27:54,888 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 14:27:54,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 17 [2018-10-04 14:27:54,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 14:27:54,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 14:27:54,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 14:27:54,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-10-04 14:27:54,895 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-10-04 14:27:54,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:54,896 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-10-04 14:27:54,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 14:27:54,896 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-10-04 14:27:54,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 14:27:54,897 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:54,897 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1] [2018-10-04 14:27:54,897 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:54,897 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:54,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1260506179, now seen corresponding path program 14 times [2018-10-04 14:27:54,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:54,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:54,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:54,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:27:54,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:55,163 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:55,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:55,164 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 14:27:55,174 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:27:55,199 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:27:55,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:27:55,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:55,341 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:55,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-10-04 14:27:55,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 14:27:55,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 14:27:55,342 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:55,342 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-10-04 14:27:55,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:55,487 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-10-04 14:27:55,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 14:27:55,487 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-10-04 14:27:55,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:55,488 INFO L225 Difference]: With dead ends: 45 [2018-10-04 14:27:55,488 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 14:27:55,488 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 19 [2018-10-04 14:27:55,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 14:27:55,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-10-04 14:27:55,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 14:27:55,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-10-04 14:27:55,499 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2018-10-04 14:27:55,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:55,499 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-10-04 14:27:55,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 14:27:55,499 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-10-04 14:27:55,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 14:27:55,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:55,500 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2018-10-04 14:27:55,500 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:55,501 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:55,501 INFO L82 PathProgramCache]: Analyzing trace with hash -165727303, now seen corresponding path program 15 times [2018-10-04 14:27:55,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:55,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:55,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:55,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:27:55,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:55,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:55,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:55,800 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:27:55,810 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:27:55,841 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 14:27:55,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:27:55,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:55,932 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:55,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:55,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 14:27:55,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 14:27:55,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 14:27:55,955 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:55,955 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 20 states. [2018-10-04 14:27:56,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:56,371 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-10-04 14:27:56,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 14:27:56,372 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-04 14:27:56,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:56,372 INFO L225 Difference]: With dead ends: 62 [2018-10-04 14:27:56,372 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 14:27:56,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 19 [2018-10-04 14:27:56,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 14:27:56,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 14:27:56,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 14:27:56,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-10-04 14:27:56,380 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2018-10-04 14:27:56,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:56,381 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-10-04 14:27:56,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 14:27:56,381 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-10-04 14:27:56,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 14:27:56,382 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:56,382 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1] [2018-10-04 14:27:56,382 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:56,382 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:56,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1448426227, now seen corresponding path program 16 times [2018-10-04 14:27:56,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:56,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:56,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:56,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:27:56,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:56,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:57,135 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:57,136 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:57,136 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 14:27:57,144 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:27:57,183 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:27:57,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:27:57,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:57,282 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:57,303 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:57,303 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-10-04 14:27:57,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 14:27:57,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 14:27:57,304 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:57,304 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2018-10-04 14:27:57,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:57,486 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-10-04 14:27:57,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 14:27:57,486 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-10-04 14:27:57,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:57,487 INFO L225 Difference]: With dead ends: 49 [2018-10-04 14:27:57,487 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 14:27:57,488 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 21 [2018-10-04 14:27:57,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 14:27:57,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2018-10-04 14:27:57,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 14:27:57,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-10-04 14:27:57,497 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-10-04 14:27:57,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:57,497 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-10-04 14:27:57,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 14:27:57,497 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-10-04 14:27:57,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 14:27:57,498 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:57,498 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-10-04 14:27:57,498 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:57,498 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:57,498 INFO L82 PathProgramCache]: Analyzing trace with hash 368133487, now seen corresponding path program 17 times [2018-10-04 14:27:57,499 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:57,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:57,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:57,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:27:57,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:57,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:57,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:57,862 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:27:57,871 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:27:57,905 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-04 14:27:57,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:27:57,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:57,996 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:58,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:58,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 14:27:58,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 14:27:58,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 14:27:58,018 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:58,018 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 22 states. [2018-10-04 14:27:58,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:58,686 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-10-04 14:27:58,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 14:27:58,687 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-04 14:27:58,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:58,687 INFO L225 Difference]: With dead ends: 68 [2018-10-04 14:27:58,687 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 14:27:58,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 21 [2018-10-04 14:27:58,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 14:27:58,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-04 14:27:58,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 14:27:58,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-10-04 14:27:58,698 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-10-04 14:27:58,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:58,698 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-10-04 14:27:58,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 14:27:58,700 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-10-04 14:27:58,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 14:27:58,701 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:58,701 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1] [2018-10-04 14:27:58,701 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:58,702 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:58,702 INFO L82 PathProgramCache]: Analyzing trace with hash -788717655, now seen corresponding path program 18 times [2018-10-04 14:27:58,702 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:58,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:58,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:58,703 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:27:58,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:58,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:58,852 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:58,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:58,853 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 14:27:58,866 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:27:58,900 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-04 14:27:58,901 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:27:58,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:59,000 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:59,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:59,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-10-04 14:27:59,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 14:27:59,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 14:27:59,022 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:59,022 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2018-10-04 14:27:59,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:59,222 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-10-04 14:27:59,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 14:27:59,222 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-10-04 14:27:59,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:59,223 INFO L225 Difference]: With dead ends: 53 [2018-10-04 14:27:59,224 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 14:27:59,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 23 [2018-10-04 14:27:59,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 14:27:59,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2018-10-04 14:27:59,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 14:27:59,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-10-04 14:27:59,234 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2018-10-04 14:27:59,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:59,235 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-10-04 14:27:59,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 14:27:59,235 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-10-04 14:27:59,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 14:27:59,236 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:59,236 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2018-10-04 14:27:59,236 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:59,236 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:59,236 INFO L82 PathProgramCache]: Analyzing trace with hash -2043489115, now seen corresponding path program 19 times [2018-10-04 14:27:59,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:59,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:59,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:59,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:27:59,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:59,544 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:59,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:59,545 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 14:27:59,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:27:59,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:59,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:59,747 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:59,770 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:59,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 14:27:59,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 14:27:59,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 14:27:59,771 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:59,771 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 24 states. [2018-10-04 14:28:00,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:00,220 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-10-04 14:28:00,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 14:28:00,220 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-04 14:28:00,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:00,221 INFO L225 Difference]: With dead ends: 74 [2018-10-04 14:28:00,221 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 14:28:00,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 23 [2018-10-04 14:28:00,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 14:28:00,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 14:28:00,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 14:28:00,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-10-04 14:28:00,228 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2018-10-04 14:28:00,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:00,228 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-10-04 14:28:00,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 14:28:00,228 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-10-04 14:28:00,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 14:28:00,229 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:00,229 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1] [2018-10-04 14:28:00,229 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:00,229 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:00,230 INFO L82 PathProgramCache]: Analyzing trace with hash -957152801, now seen corresponding path program 20 times [2018-10-04 14:28:00,230 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:00,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:00,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:00,231 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:28:00,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:00,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:00,729 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:00,729 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 14:28:00,737 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:28:00,766 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:28:00,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:00,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:01,167 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:01,188 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:01,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-10-04 14:28:01,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 14:28:01,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 14:28:01,189 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:01,189 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 17 states. [2018-10-04 14:28:01,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:01,404 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-10-04 14:28:01,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 14:28:01,405 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2018-10-04 14:28:01,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:01,406 INFO L225 Difference]: With dead ends: 57 [2018-10-04 14:28:01,407 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 14:28:01,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.2s impTime 25 [2018-10-04 14:28:01,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 14:28:01,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2018-10-04 14:28:01,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 14:28:01,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-10-04 14:28:01,415 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-10-04 14:28:01,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:01,416 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-10-04 14:28:01,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 14:28:01,416 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-10-04 14:28:01,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 14:28:01,416 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:01,416 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-10-04 14:28:01,417 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:01,417 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:01,417 INFO L82 PathProgramCache]: Analyzing trace with hash -700907173, now seen corresponding path program 21 times [2018-10-04 14:28:01,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:01,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:01,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:01,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:01,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:01,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:02,329 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:02,329 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:28:02,339 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:28:02,403 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-04 14:28:02,404 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:02,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:02,548 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:02,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 14:28:02,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 14:28:02,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 14:28:02,549 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:02,549 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 26 states. [2018-10-04 14:28:03,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:03,100 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-10-04 14:28:03,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 14:28:03,100 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-04 14:28:03,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:03,101 INFO L225 Difference]: With dead ends: 80 [2018-10-04 14:28:03,101 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 14:28:03,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.7s impTime 25 [2018-10-04 14:28:03,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 14:28:03,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 14:28:03,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 14:28:03,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-10-04 14:28:03,109 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-10-04 14:28:03,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:03,109 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-10-04 14:28:03,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 14:28:03,109 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-10-04 14:28:03,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 14:28:03,109 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:03,109 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1] [2018-10-04 14:28:03,110 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:03,110 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:03,110 INFO L82 PathProgramCache]: Analyzing trace with hash 877396373, now seen corresponding path program 22 times [2018-10-04 14:28:03,110 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:03,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:03,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:03,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:03,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:03,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:03,444 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:03,444 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:03,444 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 14:28:03,453 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:28:03,483 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:28:03,483 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:03,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:03,600 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:03,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:03,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-10-04 14:28:03,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 14:28:03,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 14:28:03,621 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:03,621 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2018-10-04 14:28:03,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:03,859 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-10-04 14:28:03,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 14:28:03,859 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-10-04 14:28:03,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:03,860 INFO L225 Difference]: With dead ends: 61 [2018-10-04 14:28:03,860 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 14:28:03,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 27 [2018-10-04 14:28:03,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 14:28:03,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-10-04 14:28:03,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 14:28:03,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-10-04 14:28:03,870 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2018-10-04 14:28:03,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:03,870 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-10-04 14:28:03,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 14:28:03,870 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-10-04 14:28:03,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 14:28:03,871 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:03,871 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2018-10-04 14:28:03,871 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:03,871 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:03,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1364257681, now seen corresponding path program 23 times [2018-10-04 14:28:03,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:03,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:03,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:03,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:03,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:04,319 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:04,319 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:04,319 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 14:28:04,326 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:28:04,358 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-04 14:28:04,359 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:04,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:04,449 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:04,469 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:04,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 14:28:04,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 14:28:04,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 14:28:04,470 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:04,470 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 28 states. [2018-10-04 14:28:05,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:05,046 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-10-04 14:28:05,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 14:28:05,046 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-04 14:28:05,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:05,047 INFO L225 Difference]: With dead ends: 86 [2018-10-04 14:28:05,047 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 14:28:05,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 27 [2018-10-04 14:28:05,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 14:28:05,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-04 14:28:05,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-04 14:28:05,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-10-04 14:28:05,053 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2018-10-04 14:28:05,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:05,054 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-10-04 14:28:05,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 14:28:05,054 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-10-04 14:28:05,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 14:28:05,054 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:05,054 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1] [2018-10-04 14:28:05,054 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:05,054 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:05,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1897217739, now seen corresponding path program 24 times [2018-10-04 14:28:05,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:05,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:05,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:05,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:05,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:05,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:05,243 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 14:28:05,250 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:28:05,295 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-04 14:28:05,295 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:05,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:05,409 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:05,429 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:05,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-10-04 14:28:05,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 14:28:05,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 14:28:05,430 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:05,430 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-10-04 14:28:05,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:05,732 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-10-04 14:28:05,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 14:28:05,733 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2018-10-04 14:28:05,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:05,734 INFO L225 Difference]: With dead ends: 65 [2018-10-04 14:28:05,734 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 14:28:05,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 29 [2018-10-04 14:28:05,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 14:28:05,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-10-04 14:28:05,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 14:28:05,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-10-04 14:28:05,744 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-10-04 14:28:05,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:05,744 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-10-04 14:28:05,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 14:28:05,744 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-10-04 14:28:05,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 14:28:05,744 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:05,745 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-10-04 14:28:05,745 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:05,745 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:05,745 INFO L82 PathProgramCache]: Analyzing trace with hash -2134920377, now seen corresponding path program 25 times [2018-10-04 14:28:05,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:05,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:05,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:05,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:05,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:05,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:06,097 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:06,097 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:06,097 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:28:06,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:28:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:06,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:06,240 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:06,262 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:06,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 14:28:06,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 14:28:06,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 14:28:06,263 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:06,263 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 30 states. [2018-10-04 14:28:06,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:06,773 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-10-04 14:28:06,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 14:28:06,773 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-04 14:28:06,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:06,774 INFO L225 Difference]: With dead ends: 92 [2018-10-04 14:28:06,774 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 14:28:06,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 29 [2018-10-04 14:28:06,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 14:28:06,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 14:28:06,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 14:28:06,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-10-04 14:28:06,781 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2018-10-04 14:28:06,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:06,781 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-10-04 14:28:06,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 14:28:06,782 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-10-04 14:28:06,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 14:28:06,782 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:06,782 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1] [2018-10-04 14:28:06,782 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:06,783 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:06,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1286350463, now seen corresponding path program 26 times [2018-10-04 14:28:06,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:06,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:06,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:06,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:28:06,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:06,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:07,190 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:07,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:07,190 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:28:07,197 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:28:07,234 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:28:07,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:07,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:07,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:07,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-10-04 14:28:07,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 14:28:07,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 14:28:07,382 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:07,382 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2018-10-04 14:28:07,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:07,666 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-10-04 14:28:07,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 14:28:07,666 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-10-04 14:28:07,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:07,666 INFO L225 Difference]: With dead ends: 69 [2018-10-04 14:28:07,667 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 14:28:07,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 31 [2018-10-04 14:28:07,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 14:28:07,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2018-10-04 14:28:07,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 14:28:07,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-10-04 14:28:07,675 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2018-10-04 14:28:07,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:07,675 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-10-04 14:28:07,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 14:28:07,675 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-10-04 14:28:07,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 14:28:07,676 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:07,676 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2018-10-04 14:28:07,676 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:07,676 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:07,677 INFO L82 PathProgramCache]: Analyzing trace with hash 767719549, now seen corresponding path program 27 times [2018-10-04 14:28:07,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:07,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:07,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:07,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:07,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:08,198 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:08,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:08,198 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 14:28:08,213 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:28:08,256 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 14:28:08,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:08,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:08,362 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:08,382 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:08,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 14:28:08,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 14:28:08,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 14:28:08,383 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:08,383 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 32 states. [2018-10-04 14:28:08,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:08,855 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-10-04 14:28:08,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 14:28:08,855 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-04 14:28:08,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:08,856 INFO L225 Difference]: With dead ends: 98 [2018-10-04 14:28:08,856 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 14:28:08,856 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 31 [2018-10-04 14:28:08,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 14:28:08,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-04 14:28:08,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 14:28:08,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-10-04 14:28:08,865 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2018-10-04 14:28:08,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:08,865 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-10-04 14:28:08,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 14:28:08,865 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-10-04 14:28:08,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-04 14:28:08,866 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:08,866 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1] [2018-10-04 14:28:08,866 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:08,866 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:08,866 INFO L82 PathProgramCache]: Analyzing trace with hash 285536695, now seen corresponding path program 28 times [2018-10-04 14:28:08,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:08,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:08,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:08,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:08,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:08,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:09,114 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:09,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:09,114 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 14:28:09,122 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:28:09,158 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:28:09,158 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:09,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:09,261 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:09,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:09,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2018-10-04 14:28:09,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 14:28:09,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 14:28:09,282 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:09,282 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 21 states. [2018-10-04 14:28:09,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:09,902 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-10-04 14:28:09,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 14:28:09,903 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2018-10-04 14:28:09,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:09,904 INFO L225 Difference]: With dead ends: 73 [2018-10-04 14:28:09,904 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 14:28:09,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 33 [2018-10-04 14:28:09,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 14:28:09,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2018-10-04 14:28:09,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 14:28:09,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-10-04 14:28:09,917 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2018-10-04 14:28:09,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:09,918 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-10-04 14:28:09,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 14:28:09,918 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-10-04 14:28:09,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 14:28:09,918 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:09,919 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-10-04 14:28:09,919 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:09,919 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:09,919 INFO L82 PathProgramCache]: Analyzing trace with hash -477209805, now seen corresponding path program 29 times [2018-10-04 14:28:09,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:09,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:09,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:09,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:09,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:09,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:10,797 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:10,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:10,797 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:28:10,805 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:28:11,033 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-04 14:28:11,033 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:11,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:11,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:11,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 14:28:11,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 14:28:11,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 14:28:11,325 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:11,325 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 34 states. [2018-10-04 14:28:12,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:12,071 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-10-04 14:28:12,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 14:28:12,072 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-04 14:28:12,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:12,072 INFO L225 Difference]: With dead ends: 104 [2018-10-04 14:28:12,072 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 14:28:12,073 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.7s impTime 33 [2018-10-04 14:28:12,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 14:28:12,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-04 14:28:12,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-04 14:28:12,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-10-04 14:28:12,083 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-10-04 14:28:12,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:12,083 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-10-04 14:28:12,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 14:28:12,083 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-10-04 14:28:12,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 14:28:12,084 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:12,084 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1] [2018-10-04 14:28:12,084 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:12,084 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:12,085 INFO L82 PathProgramCache]: Analyzing trace with hash 35497837, now seen corresponding path program 30 times [2018-10-04 14:28:12,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:12,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:12,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:12,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:12,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:12,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:12,438 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:12,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:12,438 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 14:28:12,446 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:28:12,495 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-10-04 14:28:12,495 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:12,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:12,642 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:12,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:12,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-10-04 14:28:12,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 14:28:12,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 14:28:12,663 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:12,663 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2018-10-04 14:28:13,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:13,591 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-10-04 14:28:13,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 14:28:13,591 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2018-10-04 14:28:13,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:13,592 INFO L225 Difference]: With dead ends: 77 [2018-10-04 14:28:13,592 INFO L226 Difference]: Without dead ends: 75 [2018-10-04 14:28:13,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime 35 [2018-10-04 14:28:13,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-04 14:28:13,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2018-10-04 14:28:13,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-04 14:28:13,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-10-04 14:28:13,605 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2018-10-04 14:28:13,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:13,605 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-10-04 14:28:13,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 14:28:13,605 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-10-04 14:28:13,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-04 14:28:13,606 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:13,606 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2018-10-04 14:28:13,606 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:13,606 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:13,607 INFO L82 PathProgramCache]: Analyzing trace with hash -246383767, now seen corresponding path program 31 times [2018-10-04 14:28:13,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:13,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:13,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:13,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:13,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:13,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:14,852 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:14,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:14,853 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 14:28:14,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:28:14,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:14,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:15,064 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:15,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:15,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 14:28:15,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 14:28:15,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 14:28:15,085 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:15,085 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 36 states. [2018-10-04 14:28:15,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:15,872 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-10-04 14:28:15,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 14:28:15,872 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-04 14:28:15,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:15,873 INFO L225 Difference]: With dead ends: 110 [2018-10-04 14:28:15,873 INFO L226 Difference]: Without dead ends: 73 [2018-10-04 14:28:15,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.1s impTime 35 [2018-10-04 14:28:15,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-04 14:28:15,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-04 14:28:15,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-04 14:28:15,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-10-04 14:28:15,884 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2018-10-04 14:28:15,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:15,884 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-10-04 14:28:15,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 14:28:15,884 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-10-04 14:28:15,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 14:28:15,884 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:15,885 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1] [2018-10-04 14:28:15,885 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:15,885 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:15,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1653283491, now seen corresponding path program 32 times [2018-10-04 14:28:15,885 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:15,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:15,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:15,886 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:28:15,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:15,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:16,128 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:16,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:16,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:28:16,136 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:28:16,180 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:28:16,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:16,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:16,343 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:16,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2018-10-04 14:28:16,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 14:28:16,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 14:28:16,344 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:16,344 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 23 states. [2018-10-04 14:28:16,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:16,722 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-10-04 14:28:16,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 14:28:16,723 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2018-10-04 14:28:16,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:16,723 INFO L225 Difference]: With dead ends: 81 [2018-10-04 14:28:16,723 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 14:28:16,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 37 [2018-10-04 14:28:16,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 14:28:16,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2018-10-04 14:28:16,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 14:28:16,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-04 14:28:16,734 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-10-04 14:28:16,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:16,734 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-04 14:28:16,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 14:28:16,734 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-04 14:28:16,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 14:28:16,734 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:16,735 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-10-04 14:28:16,735 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:16,735 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:16,735 INFO L82 PathProgramCache]: Analyzing trace with hash -332531425, now seen corresponding path program 33 times [2018-10-04 14:28:16,735 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:16,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:16,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:16,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:16,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:17,298 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:17,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:17,299 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 14:28:17,307 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:28:17,360 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-04 14:28:17,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:17,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:18,057 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:18,077 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:18,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 14:28:18,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 14:28:18,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 14:28:18,078 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:18,078 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 38 states. [2018-10-04 14:28:18,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:18,832 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-10-04 14:28:18,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 14:28:18,832 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-04 14:28:18,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:18,833 INFO L225 Difference]: With dead ends: 116 [2018-10-04 14:28:18,833 INFO L226 Difference]: Without dead ends: 77 [2018-10-04 14:28:18,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.6s impTime 37 [2018-10-04 14:28:18,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-04 14:28:18,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-04 14:28:18,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-04 14:28:18,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-10-04 14:28:18,846 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2018-10-04 14:28:18,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:18,847 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-10-04 14:28:18,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 14:28:18,847 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-10-04 14:28:18,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-04 14:28:18,847 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:18,847 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1] [2018-10-04 14:28:18,848 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:18,848 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:18,848 INFO L82 PathProgramCache]: Analyzing trace with hash -198022311, now seen corresponding path program 34 times [2018-10-04 14:28:18,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:18,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:18,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:18,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:18,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:18,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:19,297 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:19,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:19,298 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:28:19,305 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:28:19,348 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:28:19,348 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:19,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:19,484 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:19,503 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:19,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-10-04 14:28:19,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 14:28:19,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 14:28:19,504 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:19,504 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2018-10-04 14:28:19,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:19,869 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-10-04 14:28:19,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 14:28:19,869 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2018-10-04 14:28:19,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:19,870 INFO L225 Difference]: With dead ends: 85 [2018-10-04 14:28:19,870 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 14:28:19,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.3s impTime 39 [2018-10-04 14:28:19,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 14:28:19,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-10-04 14:28:19,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-04 14:28:19,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-10-04 14:28:19,882 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2018-10-04 14:28:19,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:19,882 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-10-04 14:28:19,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 14:28:19,883 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-10-04 14:28:19,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 14:28:19,883 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:19,883 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2018-10-04 14:28:19,883 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:19,883 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:19,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1320946603, now seen corresponding path program 35 times [2018-10-04 14:28:19,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:19,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:19,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:19,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:19,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:19,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:20,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:20,682 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 14:28:20,689 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:28:20,738 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 14:28:20,738 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:20,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:20,880 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:20,900 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:20,901 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 14:28:20,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 14:28:20,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 14:28:20,901 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:20,901 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 40 states. [2018-10-04 14:28:21,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:21,697 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-10-04 14:28:21,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 14:28:21,697 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-04 14:28:21,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:21,698 INFO L225 Difference]: With dead ends: 122 [2018-10-04 14:28:21,698 INFO L226 Difference]: Without dead ends: 81 [2018-10-04 14:28:21,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.8s impTime 39 [2018-10-04 14:28:21,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-04 14:28:21,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-04 14:28:21,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-04 14:28:21,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-10-04 14:28:21,708 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2018-10-04 14:28:21,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:21,708 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-10-04 14:28:21,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 14:28:21,708 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-10-04 14:28:21,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 14:28:21,709 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:21,709 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1] [2018-10-04 14:28:21,709 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:21,709 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:21,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1626388879, now seen corresponding path program 36 times [2018-10-04 14:28:21,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:21,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:21,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:21,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:21,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:21,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:22,014 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:22,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:22,014 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:28:22,021 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:28:22,076 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-04 14:28:22,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:22,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:22,235 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:22,254 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:22,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2018-10-04 14:28:22,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 14:28:22,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 14:28:22,255 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:22,255 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 25 states. [2018-10-04 14:28:22,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:22,635 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-10-04 14:28:22,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 14:28:22,635 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2018-10-04 14:28:22,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:22,636 INFO L225 Difference]: With dead ends: 89 [2018-10-04 14:28:22,636 INFO L226 Difference]: Without dead ends: 87 [2018-10-04 14:28:22,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.2s impTime 41 [2018-10-04 14:28:22,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-04 14:28:22,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2018-10-04 14:28:22,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-04 14:28:22,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-10-04 14:28:22,650 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2018-10-04 14:28:22,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:22,651 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-10-04 14:28:22,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 14:28:22,651 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-10-04 14:28:22,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 14:28:22,651 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:22,652 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-10-04 14:28:22,652 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:22,652 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:22,652 INFO L82 PathProgramCache]: Analyzing trace with hash -408449781, now seen corresponding path program 37 times [2018-10-04 14:28:22,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:22,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:22,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:22,653 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:22,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:22,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:23,249 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:23,249 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:28:23,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:28:23,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:23,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:23,472 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:23,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:23,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 14:28:23,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 14:28:23,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 14:28:23,493 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:23,493 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 42 states. [2018-10-04 14:28:24,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:24,182 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-10-04 14:28:24,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 14:28:24,182 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-04 14:28:24,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:24,183 INFO L225 Difference]: With dead ends: 128 [2018-10-04 14:28:24,183 INFO L226 Difference]: Without dead ends: 85 [2018-10-04 14:28:24,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 41 [2018-10-04 14:28:24,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-04 14:28:24,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-04 14:28:24,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-04 14:28:24,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-10-04 14:28:24,197 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2018-10-04 14:28:24,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:24,197 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-10-04 14:28:24,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 14:28:24,197 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-10-04 14:28:24,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-04 14:28:24,198 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:24,198 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1] [2018-10-04 14:28:24,198 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:24,198 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:24,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1130683067, now seen corresponding path program 38 times [2018-10-04 14:28:24,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:24,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:24,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:24,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:28:24,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:24,561 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:24,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:24,562 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 14:28:24,569 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:28:24,618 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:28:24,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:24,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:24,792 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:24,812 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:24,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-10-04 14:28:24,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 14:28:24,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 14:28:24,813 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:24,813 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2018-10-04 14:28:25,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:25,432 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-10-04 14:28:25,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 14:28:25,433 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2018-10-04 14:28:25,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:25,433 INFO L225 Difference]: With dead ends: 93 [2018-10-04 14:28:25,433 INFO L226 Difference]: Without dead ends: 91 [2018-10-04 14:28:25,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 43 [2018-10-04 14:28:25,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-04 14:28:25,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2018-10-04 14:28:25,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-04 14:28:25,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-10-04 14:28:25,450 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2018-10-04 14:28:25,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:25,450 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-10-04 14:28:25,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 14:28:25,451 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-10-04 14:28:25,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 14:28:25,451 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:25,451 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2018-10-04 14:28:25,451 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:25,452 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:25,452 INFO L82 PathProgramCache]: Analyzing trace with hash 40231745, now seen corresponding path program 39 times [2018-10-04 14:28:25,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:25,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:25,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:25,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:25,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:25,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:26,774 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:26,774 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:26,774 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 14:28:26,782 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:28:26,847 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-04 14:28:26,847 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:26,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:27,019 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:27,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 14:28:27,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 14:28:27,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 14:28:27,019 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:27,020 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 44 states. [2018-10-04 14:28:28,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:28,169 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-10-04 14:28:28,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 14:28:28,170 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-04 14:28:28,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:28,170 INFO L225 Difference]: With dead ends: 134 [2018-10-04 14:28:28,170 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 14:28:28,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.2s impTime 43 [2018-10-04 14:28:28,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 14:28:28,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-04 14:28:28,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-04 14:28:28,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-10-04 14:28:28,183 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2018-10-04 14:28:28,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:28,183 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-10-04 14:28:28,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 14:28:28,183 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-10-04 14:28:28,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-04 14:28:28,184 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:28,184 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1] [2018-10-04 14:28:28,184 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:28,184 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:28,184 INFO L82 PathProgramCache]: Analyzing trace with hash -2030121349, now seen corresponding path program 40 times [2018-10-04 14:28:28,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:28,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:28,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:28,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:28,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:28,496 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:28,497 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:28,497 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:28:28,504 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:28:28,556 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:28:28,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:28,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:28,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:28,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2018-10-04 14:28:28,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 14:28:28,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 14:28:28,725 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:28,725 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 27 states. [2018-10-04 14:28:29,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:29,255 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-10-04 14:28:29,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 14:28:29,255 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 88 [2018-10-04 14:28:29,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:29,256 INFO L225 Difference]: With dead ends: 97 [2018-10-04 14:28:29,256 INFO L226 Difference]: Without dead ends: 95 [2018-10-04 14:28:29,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 45 [2018-10-04 14:28:29,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-04 14:28:29,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2018-10-04 14:28:29,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 14:28:29,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-10-04 14:28:29,272 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2018-10-04 14:28:29,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:29,272 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-10-04 14:28:29,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 14:28:29,272 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-10-04 14:28:29,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 14:28:29,273 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:29,273 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-10-04 14:28:29,273 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:29,273 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:29,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1031530761, now seen corresponding path program 41 times [2018-10-04 14:28:29,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:29,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:29,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:29,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:29,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:30,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:30,304 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 14:28:30,312 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:28:30,382 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-04 14:28:30,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:30,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:30,682 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:30,702 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:30,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 14:28:30,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 14:28:30,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 14:28:30,703 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:30,703 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 46 states. [2018-10-04 14:28:31,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:31,793 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-10-04 14:28:31,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 14:28:31,793 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-04 14:28:31,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:31,794 INFO L225 Difference]: With dead ends: 140 [2018-10-04 14:28:31,794 INFO L226 Difference]: Without dead ends: 93 [2018-10-04 14:28:31,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.0s impTime 45 [2018-10-04 14:28:31,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-04 14:28:31,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-04 14:28:31,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-04 14:28:31,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-10-04 14:28:31,811 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-10-04 14:28:31,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:31,811 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-10-04 14:28:31,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 14:28:31,811 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-10-04 14:28:31,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 14:28:31,812 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:31,812 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1] [2018-10-04 14:28:31,812 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:31,812 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:31,813 INFO L82 PathProgramCache]: Analyzing trace with hash 769709361, now seen corresponding path program 42 times [2018-10-04 14:28:31,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:31,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:31,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:31,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:31,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:31,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:32,226 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:32,226 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:32,226 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:28:32,234 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:28:32,321 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-10-04 14:28:32,321 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:32,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:32,547 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:32,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-10-04 14:28:32,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 14:28:32,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 14:28:32,548 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:32,548 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2018-10-04 14:28:33,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:33,035 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-10-04 14:28:33,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 14:28:33,035 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2018-10-04 14:28:33,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:33,036 INFO L225 Difference]: With dead ends: 101 [2018-10-04 14:28:33,036 INFO L226 Difference]: Without dead ends: 99 [2018-10-04 14:28:33,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.3s impTime 47 [2018-10-04 14:28:33,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-04 14:28:33,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-10-04 14:28:33,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-04 14:28:33,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-10-04 14:28:33,052 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2018-10-04 14:28:33,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:33,052 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-10-04 14:28:33,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 14:28:33,053 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-10-04 14:28:33,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-04 14:28:33,053 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:33,053 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2018-10-04 14:28:33,053 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:33,054 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:33,054 INFO L82 PathProgramCache]: Analyzing trace with hash 956254253, now seen corresponding path program 43 times [2018-10-04 14:28:33,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:33,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:33,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:33,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:33,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:33,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:33,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:33,823 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:33,823 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 14:28:33,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:28:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:33,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:35,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:35,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:35,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 14:28:35,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 14:28:35,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 14:28:35,244 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:35,244 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 48 states. [2018-10-04 14:28:36,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:36,555 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-10-04 14:28:36,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 14:28:36,555 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-04 14:28:36,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:36,556 INFO L225 Difference]: With dead ends: 146 [2018-10-04 14:28:36,556 INFO L226 Difference]: Without dead ends: 97 [2018-10-04 14:28:36,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 0.9s impTime 47 [2018-10-04 14:28:36,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-04 14:28:36,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-04 14:28:36,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-04 14:28:36,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-10-04 14:28:36,570 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2018-10-04 14:28:36,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:36,570 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-10-04 14:28:36,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 14:28:36,570 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-10-04 14:28:36,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-04 14:28:36,571 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:36,571 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1] [2018-10-04 14:28:36,571 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:36,572 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:36,572 INFO L82 PathProgramCache]: Analyzing trace with hash 251550055, now seen corresponding path program 44 times [2018-10-04 14:28:36,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:36,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:36,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:36,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:28:36,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:36,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:36,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:36,893 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 14:28:36,900 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:28:36,955 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:28:36,956 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:36,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:37,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:37,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2018-10-04 14:28:37,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 14:28:37,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 14:28:37,140 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:37,140 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 29 states. [2018-10-04 14:28:37,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:37,633 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-10-04 14:28:37,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 14:28:37,633 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 96 [2018-10-04 14:28:37,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:37,634 INFO L225 Difference]: With dead ends: 105 [2018-10-04 14:28:37,634 INFO L226 Difference]: Without dead ends: 103 [2018-10-04 14:28:37,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 49 [2018-10-04 14:28:37,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-04 14:28:37,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-10-04 14:28:37,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-04 14:28:37,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-10-04 14:28:37,651 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-10-04 14:28:37,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:37,651 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-10-04 14:28:37,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 14:28:37,651 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-10-04 14:28:37,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 14:28:37,652 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:37,652 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-10-04 14:28:37,652 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:37,652 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:37,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1221367523, now seen corresponding path program 45 times [2018-10-04 14:28:37,653 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:37,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:37,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:37,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:37,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:39,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:39,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:39,441 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:28:39,449 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:28:39,526 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-04 14:28:39,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:39,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:39,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:39,709 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:39,709 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 14:28:39,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 14:28:39,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 14:28:39,710 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:39,710 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 50 states. [2018-10-04 14:28:41,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:41,164 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-10-04 14:28:41,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 14:28:41,164 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-04 14:28:41,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:41,165 INFO L225 Difference]: With dead ends: 152 [2018-10-04 14:28:41,165 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 14:28:41,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 1.9s impTime 49 [2018-10-04 14:28:41,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 14:28:41,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-04 14:28:41,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 14:28:41,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-10-04 14:28:41,182 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2018-10-04 14:28:41,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:41,182 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-10-04 14:28:41,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 14:28:41,182 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-10-04 14:28:41,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 14:28:41,183 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:41,183 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1] [2018-10-04 14:28:41,183 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:41,183 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:41,183 INFO L82 PathProgramCache]: Analyzing trace with hash -99845347, now seen corresponding path program 46 times [2018-10-04 14:28:41,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:41,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:41,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:41,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:41,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:41,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:42,555 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:42,555 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 14:28:42,563 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:28:42,623 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:28:42,623 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:42,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:42,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:42,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:42,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-10-04 14:28:42,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 14:28:42,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 14:28:42,805 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:42,805 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2018-10-04 14:28:43,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:43,325 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-10-04 14:28:43,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 14:28:43,325 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2018-10-04 14:28:43,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:43,326 INFO L225 Difference]: With dead ends: 109 [2018-10-04 14:28:43,327 INFO L226 Difference]: Without dead ends: 107 [2018-10-04 14:28:43,327 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.0s impTime 51 [2018-10-04 14:28:43,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-04 14:28:43,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2018-10-04 14:28:43,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-04 14:28:43,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-10-04 14:28:43,346 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2018-10-04 14:28:43,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:43,346 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-10-04 14:28:43,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 14:28:43,347 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-10-04 14:28:43,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-04 14:28:43,347 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:43,347 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2018-10-04 14:28:43,348 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:43,348 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:43,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1462164711, now seen corresponding path program 47 times [2018-10-04 14:28:43,348 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:43,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:43,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:43,349 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:43,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:44,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:44,274 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:44,274 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 14:28:44,281 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:28:44,360 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-04 14:28:44,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:44,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:44,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:44,641 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:44,641 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 14:28:44,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 14:28:44,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 14:28:44,642 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:44,642 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 52 states. [2018-10-04 14:28:46,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:46,083 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-10-04 14:28:46,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 14:28:46,083 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-04 14:28:46,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:46,084 INFO L225 Difference]: With dead ends: 158 [2018-10-04 14:28:46,084 INFO L226 Difference]: Without dead ends: 105 [2018-10-04 14:28:46,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.2s impTime 51 [2018-10-04 14:28:46,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-04 14:28:46,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-04 14:28:46,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-04 14:28:46,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-10-04 14:28:46,107 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2018-10-04 14:28:46,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:46,107 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-10-04 14:28:46,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 14:28:46,107 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-10-04 14:28:46,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 14:28:46,108 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:46,108 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1] [2018-10-04 14:28:46,108 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:46,108 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:46,109 INFO L82 PathProgramCache]: Analyzing trace with hash 850942547, now seen corresponding path program 48 times [2018-10-04 14:28:46,109 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:46,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:46,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:46,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:46,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:48,733 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:48,734 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 14:28:48,741 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:28:48,822 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-04 14:28:48,823 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:48,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:49,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:49,374 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:49,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2018-10-04 14:28:49,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 14:28:49,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 14:28:49,375 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:49,375 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 31 states. [2018-10-04 14:28:50,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:50,072 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-10-04 14:28:50,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 14:28:50,072 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 104 [2018-10-04 14:28:50,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:50,073 INFO L225 Difference]: With dead ends: 113 [2018-10-04 14:28:50,073 INFO L226 Difference]: Without dead ends: 111 [2018-10-04 14:28:50,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time 2.3s impTime 53 [2018-10-04 14:28:50,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-04 14:28:50,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2018-10-04 14:28:50,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-04 14:28:50,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-10-04 14:28:50,098 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2018-10-04 14:28:50,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:50,098 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-10-04 14:28:50,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 14:28:50,099 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-10-04 14:28:50,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-04 14:28:50,099 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:50,099 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-10-04 14:28:50,099 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:50,100 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:50,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1711934671, now seen corresponding path program 49 times [2018-10-04 14:28:50,100 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:50,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:50,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:50,101 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:50,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:50,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:51,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:51,799 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 14:28:51,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:28:51,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:51,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:52,076 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:52,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 14:28:52,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 14:28:52,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 14:28:52,077 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:52,077 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 54 states. [2018-10-04 14:28:53,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:53,456 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-10-04 14:28:53,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 14:28:53,456 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-04 14:28:53,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:53,457 INFO L225 Difference]: With dead ends: 164 [2018-10-04 14:28:53,457 INFO L226 Difference]: Without dead ends: 109 [2018-10-04 14:28:53,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.7s impTime 53 [2018-10-04 14:28:53,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-04 14:28:53,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-04 14:28:53,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-04 14:28:53,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-10-04 14:28:53,475 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2018-10-04 14:28:53,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:53,475 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-10-04 14:28:53,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 14:28:53,475 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-10-04 14:28:53,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-04 14:28:53,476 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:53,476 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1] [2018-10-04 14:28:53,476 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:53,476 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:53,477 INFO L82 PathProgramCache]: Analyzing trace with hash -223930615, now seen corresponding path program 50 times [2018-10-04 14:28:53,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:53,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:53,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:53,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:28:53,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:53,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:54,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:54,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:54,005 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:28:54,012 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:28:54,073 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:28:54,073 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:54,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:54,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:54,305 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:54,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-10-04 14:28:54,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 14:28:54,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 14:28:54,305 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:54,306 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2018-10-04 14:28:54,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:54,817 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-10-04 14:28:54,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 14:28:54,818 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2018-10-04 14:28:54,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:54,819 INFO L225 Difference]: With dead ends: 117 [2018-10-04 14:28:54,819 INFO L226 Difference]: Without dead ends: 115 [2018-10-04 14:28:54,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime 55 [2018-10-04 14:28:54,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-04 14:28:54,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2018-10-04 14:28:54,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-04 14:28:54,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-10-04 14:28:54,838 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2018-10-04 14:28:54,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:54,839 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-10-04 14:28:54,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 14:28:54,839 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-10-04 14:28:54,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 14:28:54,839 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:54,840 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2018-10-04 14:28:54,840 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:54,840 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:54,840 INFO L82 PathProgramCache]: Analyzing trace with hash -449022971, now seen corresponding path program 51 times [2018-10-04 14:28:54,840 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:54,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:54,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:54,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:54,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:55,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:55,653 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:55,654 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 14:28:55,662 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:28:55,742 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-04 14:28:55,743 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:55,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:55,942 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:55,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 14:28:55,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 14:28:55,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 14:28:55,943 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:55,943 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 56 states. [2018-10-04 14:28:56,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:56,886 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-10-04 14:28:56,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 14:28:56,886 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-04 14:28:56,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:56,887 INFO L225 Difference]: With dead ends: 170 [2018-10-04 14:28:56,887 INFO L226 Difference]: Without dead ends: 113 [2018-10-04 14:28:56,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.9s impTime 55 [2018-10-04 14:28:56,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-04 14:28:56,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-04 14:28:56,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-04 14:28:56,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-10-04 14:28:56,909 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2018-10-04 14:28:56,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:56,909 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-10-04 14:28:56,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 14:28:56,909 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-10-04 14:28:56,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-04 14:28:56,910 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:56,910 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1] [2018-10-04 14:28:56,910 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:56,910 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:56,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1802883391, now seen corresponding path program 52 times [2018-10-04 14:28:56,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:56,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:56,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:56,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:56,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:57,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:57,637 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:57,637 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 14:28:57,645 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:28:57,708 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:28:57,708 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:57,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:58,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:58,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:58,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2018-10-04 14:28:58,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 14:28:58,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 14:28:58,140 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:58,140 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 33 states. [2018-10-04 14:28:58,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:58,866 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-10-04 14:28:58,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 14:28:58,867 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 112 [2018-10-04 14:28:58,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:58,868 INFO L225 Difference]: With dead ends: 121 [2018-10-04 14:28:58,869 INFO L226 Difference]: Without dead ends: 119 [2018-10-04 14:28:58,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 0.8s impTime 57 [2018-10-04 14:28:58,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-04 14:28:58,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2018-10-04 14:28:58,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-04 14:28:58,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-10-04 14:28:58,897 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2018-10-04 14:28:58,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:58,897 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-10-04 14:28:58,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 14:28:58,898 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-10-04 14:28:58,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-04 14:28:58,898 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:58,898 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-10-04 14:28:58,899 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:58,899 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:58,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1699051707, now seen corresponding path program 53 times [2018-10-04 14:28:58,899 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:58,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:58,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:58,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:58,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:58,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:00,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:00,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:00,316 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 14:29:00,324 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:29:00,416 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-04 14:29:00,416 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:00,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:00,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:00,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 14:29:00,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 14:29:00,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 14:29:00,650 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:00,650 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 58 states. [2018-10-04 14:29:02,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:02,323 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-10-04 14:29:02,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 14:29:02,323 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-04 14:29:02,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:02,324 INFO L225 Difference]: With dead ends: 176 [2018-10-04 14:29:02,324 INFO L226 Difference]: Without dead ends: 117 [2018-10-04 14:29:02,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.6s impTime 57 [2018-10-04 14:29:02,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-04 14:29:02,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-04 14:29:02,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-04 14:29:02,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-10-04 14:29:02,345 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-10-04 14:29:02,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:02,345 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-10-04 14:29:02,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 14:29:02,345 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-10-04 14:29:02,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-04 14:29:02,346 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:02,346 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1] [2018-10-04 14:29:02,346 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:02,346 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:02,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1220126965, now seen corresponding path program 54 times [2018-10-04 14:29:02,347 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:02,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:02,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:02,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:02,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:02,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:03,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:03,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:03,326 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 14:29:03,333 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:29:03,425 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-10-04 14:29:03,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:03,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:04,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:04,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:04,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-10-04 14:29:04,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 14:29:04,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 14:29:04,476 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:04,476 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2018-10-04 14:29:05,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:05,675 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2018-10-04 14:29:05,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 14:29:05,676 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2018-10-04 14:29:05,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:05,677 INFO L225 Difference]: With dead ends: 125 [2018-10-04 14:29:05,677 INFO L226 Difference]: Without dead ends: 123 [2018-10-04 14:29:05,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 0.9s impTime 59 [2018-10-04 14:29:05,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-04 14:29:05,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-10-04 14:29:05,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-04 14:29:05,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-10-04 14:29:05,702 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2018-10-04 14:29:05,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:05,702 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-10-04 14:29:05,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 14:29:05,702 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-10-04 14:29:05,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-04 14:29:05,703 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:05,703 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1] [2018-10-04 14:29:05,703 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:05,703 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:05,703 INFO L82 PathProgramCache]: Analyzing trace with hash 15874801, now seen corresponding path program 55 times [2018-10-04 14:29:05,703 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:05,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:05,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:05,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:05,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:06,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:06,928 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:06,928 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 14:29:06,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:29:07,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:07,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:07,289 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:07,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-04 14:29:07,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 14:29:07,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 14:29:07,290 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:07,290 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 60 states. [2018-10-04 14:29:09,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:09,110 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2018-10-04 14:29:09,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 14:29:09,111 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-10-04 14:29:09,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:09,111 INFO L225 Difference]: With dead ends: 182 [2018-10-04 14:29:09,111 INFO L226 Difference]: Without dead ends: 121 [2018-10-04 14:29:09,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.6s impTime 59 [2018-10-04 14:29:09,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-04 14:29:09,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-04 14:29:09,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-04 14:29:09,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-10-04 14:29:09,132 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2018-10-04 14:29:09,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:09,132 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-10-04 14:29:09,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 14:29:09,133 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-10-04 14:29:09,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-04 14:29:09,133 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:09,133 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1] [2018-10-04 14:29:09,133 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:09,133 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:09,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1308639701, now seen corresponding path program 56 times [2018-10-04 14:29:09,134 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:09,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:09,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:09,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:29:09,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:09,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:09,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:09,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:09,801 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:29:09,810 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:29:09,884 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:29:09,884 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:09,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:10,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:10,367 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:10,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2018-10-04 14:29:10,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 14:29:10,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 14:29:10,368 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:10,368 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 35 states. [2018-10-04 14:29:11,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:11,077 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2018-10-04 14:29:11,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 14:29:11,077 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 120 [2018-10-04 14:29:11,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:11,078 INFO L225 Difference]: With dead ends: 129 [2018-10-04 14:29:11,078 INFO L226 Difference]: Without dead ends: 127 [2018-10-04 14:29:11,078 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 0.8s impTime 61 [2018-10-04 14:29:11,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-04 14:29:11,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2018-10-04 14:29:11,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-04 14:29:11,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-10-04 14:29:11,101 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-10-04 14:29:11,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:11,101 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-10-04 14:29:11,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 14:29:11,101 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-10-04 14:29:11,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-04 14:29:11,102 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:11,102 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-10-04 14:29:11,102 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:11,102 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:11,102 INFO L82 PathProgramCache]: Analyzing trace with hash 822598311, now seen corresponding path program 57 times [2018-10-04 14:29:11,102 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:11,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:11,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:11,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:11,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:11,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:12,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:12,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:12,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:29:12,361 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:29:12,496 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-04 14:29:12,496 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:12,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:12,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:12,848 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:12,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-04 14:29:12,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 14:29:12,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 14:29:12,849 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:12,849 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 62 states. [2018-10-04 14:29:14,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:14,370 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2018-10-04 14:29:14,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 14:29:14,370 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-10-04 14:29:14,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:14,371 INFO L225 Difference]: With dead ends: 188 [2018-10-04 14:29:14,371 INFO L226 Difference]: Without dead ends: 125 [2018-10-04 14:29:14,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.5s impTime 61 [2018-10-04 14:29:14,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-04 14:29:14,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-04 14:29:14,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-04 14:29:14,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-10-04 14:29:14,400 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2018-10-04 14:29:14,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:14,401 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-10-04 14:29:14,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 14:29:14,401 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-10-04 14:29:14,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-04 14:29:14,401 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:14,402 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1] [2018-10-04 14:29:14,402 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:14,402 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:14,402 INFO L82 PathProgramCache]: Analyzing trace with hash -858967839, now seen corresponding path program 58 times [2018-10-04 14:29:14,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:14,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:14,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:14,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:14,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:14,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:14,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:14,806 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:14,806 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 14:29:14,815 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:29:14,894 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:29:14,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:14,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:15,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:15,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-10-04 14:29:15,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 14:29:15,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 14:29:15,140 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:15,140 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2018-10-04 14:29:15,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:15,939 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-10-04 14:29:15,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 14:29:15,939 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2018-10-04 14:29:15,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:15,941 INFO L225 Difference]: With dead ends: 133 [2018-10-04 14:29:15,941 INFO L226 Difference]: Without dead ends: 131 [2018-10-04 14:29:15,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 63 [2018-10-04 14:29:15,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-04 14:29:15,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2018-10-04 14:29:15,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-04 14:29:15,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-10-04 14:29:15,965 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2018-10-04 14:29:15,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:15,965 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-10-04 14:29:15,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 14:29:15,966 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-10-04 14:29:15,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-04 14:29:15,966 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:15,966 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1] [2018-10-04 14:29:15,967 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:15,967 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:15,967 INFO L82 PathProgramCache]: Analyzing trace with hash -834439203, now seen corresponding path program 59 times [2018-10-04 14:29:15,967 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:15,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:15,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:15,968 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:15,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:15,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:17,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:17,034 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:17,034 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 14:29:17,044 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:29:17,151 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-04 14:29:17,151 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:17,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:17,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:17,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:17,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-04 14:29:17,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 14:29:17,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 14:29:17,439 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:17,440 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 64 states. [2018-10-04 14:29:18,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:18,499 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2018-10-04 14:29:18,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 14:29:18,500 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-10-04 14:29:18,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:18,500 INFO L225 Difference]: With dead ends: 194 [2018-10-04 14:29:18,500 INFO L226 Difference]: Without dead ends: 129 [2018-10-04 14:29:18,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.2s impTime 63 [2018-10-04 14:29:18,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-04 14:29:18,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-04 14:29:18,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-04 14:29:18,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-10-04 14:29:18,523 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2018-10-04 14:29:18,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:18,524 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-10-04 14:29:18,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 14:29:18,524 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-10-04 14:29:18,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-04 14:29:18,524 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:18,524 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1] [2018-10-04 14:29:18,525 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:18,525 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:18,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1096867561, now seen corresponding path program 60 times [2018-10-04 14:29:18,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:18,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:18,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:18,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:18,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:18,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:18,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:18,934 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:18,934 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 14:29:18,942 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:29:19,050 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-10-04 14:29:19,051 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:19,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:19,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:19,285 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:19,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2018-10-04 14:29:19,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 14:29:19,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 14:29:19,286 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:19,286 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 37 states. [2018-10-04 14:29:20,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:20,015 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2018-10-04 14:29:20,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 14:29:20,015 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 128 [2018-10-04 14:29:20,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:20,017 INFO L225 Difference]: With dead ends: 137 [2018-10-04 14:29:20,017 INFO L226 Difference]: Without dead ends: 135 [2018-10-04 14:29:20,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 65 [2018-10-04 14:29:20,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-04 14:29:20,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2018-10-04 14:29:20,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-04 14:29:20,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-10-04 14:29:20,041 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2018-10-04 14:29:20,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:20,041 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-10-04 14:29:20,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 14:29:20,041 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-10-04 14:29:20,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-04 14:29:20,042 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:20,042 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-10-04 14:29:20,042 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:20,042 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:20,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1822805357, now seen corresponding path program 61 times [2018-10-04 14:29:20,042 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:20,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:20,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:20,043 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:20,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:20,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:21,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:21,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:21,044 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 14:29:21,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:29:21,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:21,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:21,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:21,402 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:21,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-04 14:29:21,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 14:29:21,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 14:29:21,403 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:21,403 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 66 states. [2018-10-04 14:29:23,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:23,711 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2018-10-04 14:29:23,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 14:29:23,712 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-10-04 14:29:23,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:23,712 INFO L225 Difference]: With dead ends: 200 [2018-10-04 14:29:23,712 INFO L226 Difference]: Without dead ends: 133 [2018-10-04 14:29:23,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.5s impTime 65 [2018-10-04 14:29:23,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-04 14:29:23,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-04 14:29:23,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-04 14:29:23,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-10-04 14:29:23,739 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2018-10-04 14:29:23,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:23,739 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-10-04 14:29:23,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 14:29:23,739 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-10-04 14:29:23,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-04 14:29:23,740 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:23,740 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1] [2018-10-04 14:29:23,740 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:23,740 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:23,740 INFO L82 PathProgramCache]: Analyzing trace with hash 787132109, now seen corresponding path program 62 times [2018-10-04 14:29:23,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:23,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:23,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:23,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:29:23,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:23,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:24,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:24,242 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:24,242 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:29:24,250 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:29:24,330 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:29:24,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:24,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:24,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:24,833 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:24,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-10-04 14:29:24,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 14:29:24,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 14:29:24,834 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:24,834 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2018-10-04 14:29:25,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:25,650 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2018-10-04 14:29:25,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 14:29:25,651 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2018-10-04 14:29:25,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:25,651 INFO L225 Difference]: With dead ends: 141 [2018-10-04 14:29:25,652 INFO L226 Difference]: Without dead ends: 139 [2018-10-04 14:29:25,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.6s impTime 67 [2018-10-04 14:29:25,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-04 14:29:25,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-10-04 14:29:25,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-04 14:29:25,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-10-04 14:29:25,677 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2018-10-04 14:29:25,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:25,677 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-10-04 14:29:25,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 14:29:25,678 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-10-04 14:29:25,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-04 14:29:25,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:25,678 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1] [2018-10-04 14:29:25,679 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:25,679 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:25,679 INFO L82 PathProgramCache]: Analyzing trace with hash 519645897, now seen corresponding path program 63 times [2018-10-04 14:29:25,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:25,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:25,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:25,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:25,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:25,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:27,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:27,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:27,313 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) [2018-10-04 14:29:27,323 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:29:27,437 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-04 14:29:27,438 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:27,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:27,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:27,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:27,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-04 14:29:27,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 14:29:27,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 14:29:27,699 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:27,699 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 68 states. [2018-10-04 14:29:30,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:30,023 INFO L93 Difference]: Finished difference Result 206 states and 208 transitions. [2018-10-04 14:29:30,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 14:29:30,023 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-10-04 14:29:30,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:30,024 INFO L225 Difference]: With dead ends: 206 [2018-10-04 14:29:30,024 INFO L226 Difference]: Without dead ends: 137 [2018-10-04 14:29:30,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.1s impTime 67 [2018-10-04 14:29:30,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-04 14:29:30,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-04 14:29:30,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-04 14:29:30,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2018-10-04 14:29:30,051 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2018-10-04 14:29:30,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:30,051 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2018-10-04 14:29:30,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 14:29:30,051 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2018-10-04 14:29:30,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-04 14:29:30,052 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:30,052 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 1, 1, 1, 1] [2018-10-04 14:29:30,052 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:30,052 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:30,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1226635779, now seen corresponding path program 64 times [2018-10-04 14:29:30,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:30,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:30,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:30,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:30,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:30,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:30,464 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:30,464 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:29:30,473 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:29:30,559 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:29:30,560 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:30,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:31,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:31,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:31,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2018-10-04 14:29:31,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 14:29:31,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 14:29:31,141 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:31,141 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 39 states. [2018-10-04 14:29:32,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:32,104 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-10-04 14:29:32,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 14:29:32,105 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 136 [2018-10-04 14:29:32,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:32,106 INFO L225 Difference]: With dead ends: 145 [2018-10-04 14:29:32,106 INFO L226 Difference]: Without dead ends: 143 [2018-10-04 14:29:32,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 0.7s impTime 69 [2018-10-04 14:29:32,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-04 14:29:32,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-10-04 14:29:32,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-04 14:29:32,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-10-04 14:29:32,134 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2018-10-04 14:29:32,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:32,134 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-10-04 14:29:32,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 14:29:32,134 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-10-04 14:29:32,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-04 14:29:32,135 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:32,135 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-10-04 14:29:32,135 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:32,135 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:32,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1975877759, now seen corresponding path program 65 times [2018-10-04 14:29:32,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:32,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:32,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:32,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:32,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:33,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:33,696 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 14:29:33,704 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:29:33,821 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-04 14:29:33,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:33,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:34,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:34,073 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:34,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-04 14:29:34,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 14:29:34,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 14:29:34,074 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:34,074 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 70 states. [2018-10-04 14:29:36,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:36,409 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2018-10-04 14:29:36,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 14:29:36,409 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-10-04 14:29:36,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:36,410 INFO L225 Difference]: With dead ends: 212 [2018-10-04 14:29:36,410 INFO L226 Difference]: Without dead ends: 141 [2018-10-04 14:29:36,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 2.0s impTime 69 [2018-10-04 14:29:36,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-04 14:29:36,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-04 14:29:36,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-04 14:29:36,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-10-04 14:29:36,437 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-10-04 14:29:36,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:36,437 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-10-04 14:29:36,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 14:29:36,437 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-10-04 14:29:36,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-04 14:29:36,438 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:36,438 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 1, 1, 1, 1] [2018-10-04 14:29:36,438 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:36,438 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:36,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1050354361, now seen corresponding path program 66 times [2018-10-04 14:29:36,439 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:36,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:36,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:36,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:36,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:36,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:36,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:36,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:36,782 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 14:29:36,790 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:29:36,906 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-10-04 14:29:36,906 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:36,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:37,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:37,382 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:37,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-10-04 14:29:37,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 14:29:37,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 14:29:37,383 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:37,383 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 40 states. [2018-10-04 14:29:38,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:38,234 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2018-10-04 14:29:38,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 14:29:38,234 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 140 [2018-10-04 14:29:38,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:38,236 INFO L225 Difference]: With dead ends: 149 [2018-10-04 14:29:38,236 INFO L226 Difference]: Without dead ends: 147 [2018-10-04 14:29:38,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.6s impTime 71 [2018-10-04 14:29:38,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-04 14:29:38,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2018-10-04 14:29:38,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-04 14:29:38,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2018-10-04 14:29:38,267 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 140 [2018-10-04 14:29:38,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:38,267 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2018-10-04 14:29:38,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 14:29:38,267 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2018-10-04 14:29:38,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-04 14:29:38,268 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:38,268 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1] [2018-10-04 14:29:38,268 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:38,268 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:38,269 INFO L82 PathProgramCache]: Analyzing trace with hash 73159605, now seen corresponding path program 67 times [2018-10-04 14:29:38,269 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:38,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:38,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:38,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:38,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:38,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:39,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:39,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:39,870 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:29:39,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:29:39,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:39,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:40,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:40,208 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:40,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-04 14:29:40,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 14:29:40,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 14:29:40,210 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:40,210 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 72 states. [2018-10-04 14:29:42,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:42,937 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2018-10-04 14:29:42,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 14:29:42,937 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-10-04 14:29:42,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:42,938 INFO L225 Difference]: With dead ends: 218 [2018-10-04 14:29:42,938 INFO L226 Difference]: Without dead ends: 145 [2018-10-04 14:29:42,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.2s impTime 71 [2018-10-04 14:29:42,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-04 14:29:42,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-04 14:29:42,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-04 14:29:42,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-10-04 14:29:42,977 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 142 [2018-10-04 14:29:42,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:42,977 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-10-04 14:29:42,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 14:29:42,978 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-10-04 14:29:42,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-04 14:29:42,978 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:42,978 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 1, 1, 1, 1] [2018-10-04 14:29:42,979 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:42,979 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:42,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1220692207, now seen corresponding path program 68 times [2018-10-04 14:29:42,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:42,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:42,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:42,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:29:42,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:43,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:43,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:43,505 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 14:29:43,511 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:29:43,596 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:29:43,597 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:43,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:43,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:43,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:43,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2018-10-04 14:29:43,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 14:29:43,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 14:29:43,878 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:43,878 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 41 states. [2018-10-04 14:29:44,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:44,763 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2018-10-04 14:29:44,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 14:29:44,764 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 144 [2018-10-04 14:29:44,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:44,765 INFO L225 Difference]: With dead ends: 153 [2018-10-04 14:29:44,765 INFO L226 Difference]: Without dead ends: 151 [2018-10-04 14:29:44,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime 73 [2018-10-04 14:29:44,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-04 14:29:44,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2018-10-04 14:29:44,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-04 14:29:44,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-10-04 14:29:44,802 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-10-04 14:29:44,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:44,802 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-10-04 14:29:44,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 14:29:44,802 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-10-04 14:29:44,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-04 14:29:44,803 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:44,803 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-10-04 14:29:44,803 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:44,804 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:44,804 INFO L82 PathProgramCache]: Analyzing trace with hash 559072363, now seen corresponding path program 69 times [2018-10-04 14:29:44,804 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:44,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:44,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:44,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:44,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:44,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:46,417 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:46,417 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:29:46,423 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:29:46,555 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-04 14:29:46,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:46,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:46,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:46,820 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:46,820 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-04 14:29:46,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 14:29:46,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 14:29:46,821 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:46,821 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 74 states. [2018-10-04 14:29:49,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:49,710 INFO L93 Difference]: Finished difference Result 224 states and 226 transitions. [2018-10-04 14:29:49,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 14:29:49,710 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-10-04 14:29:49,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:49,711 INFO L225 Difference]: With dead ends: 224 [2018-10-04 14:29:49,711 INFO L226 Difference]: Without dead ends: 149 [2018-10-04 14:29:49,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.3s impTime 73 [2018-10-04 14:29:49,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-04 14:29:49,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-04 14:29:49,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-04 14:29:49,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2018-10-04 14:29:49,748 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2018-10-04 14:29:49,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:49,748 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2018-10-04 14:29:49,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 14:29:49,748 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2018-10-04 14:29:49,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-04 14:29:49,749 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:49,749 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 35, 1, 1, 1, 1] [2018-10-04 14:29:49,749 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:49,749 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:49,750 INFO L82 PathProgramCache]: Analyzing trace with hash 719817893, now seen corresponding path program 70 times [2018-10-04 14:29:49,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:49,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:49,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:49,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:49,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:50,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:50,215 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:50,215 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:29:50,222 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:29:50,315 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:29:50,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:50,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:50,630 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:50,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-10-04 14:29:50,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 14:29:50,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 14:29:50,631 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:50,631 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 42 states. [2018-10-04 14:29:51,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:51,591 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-10-04 14:29:51,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 14:29:51,592 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 148 [2018-10-04 14:29:51,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:51,593 INFO L225 Difference]: With dead ends: 157 [2018-10-04 14:29:51,593 INFO L226 Difference]: Without dead ends: 155 [2018-10-04 14:29:51,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.7s impTime 75 [2018-10-04 14:29:51,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-04 14:29:51,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2018-10-04 14:29:51,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-04 14:29:51,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2018-10-04 14:29:51,631 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 148 [2018-10-04 14:29:51,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:51,631 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2018-10-04 14:29:51,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 14:29:51,631 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2018-10-04 14:29:51,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-04 14:29:51,632 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:51,632 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1] [2018-10-04 14:29:51,632 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:51,633 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:51,633 INFO L82 PathProgramCache]: Analyzing trace with hash 255193761, now seen corresponding path program 71 times [2018-10-04 14:29:51,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:51,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:51,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:51,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:51,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:53,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:53,550 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:53,550 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 14:29:53,557 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:29:53,692 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-04 14:29:53,692 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:53,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:54,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:54,042 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:54,042 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-04 14:29:54,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 14:29:54,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 14:29:54,044 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:54,044 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 76 states. [2018-10-04 14:29:56,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:56,922 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2018-10-04 14:29:56,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-04 14:29:56,922 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-10-04 14:29:56,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:56,923 INFO L225 Difference]: With dead ends: 230 [2018-10-04 14:29:56,923 INFO L226 Difference]: Without dead ends: 153 [2018-10-04 14:29:56,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time 2.6s impTime 75 [2018-10-04 14:29:56,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-04 14:29:56,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-04 14:29:56,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-04 14:29:56,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-10-04 14:29:56,962 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2018-10-04 14:29:56,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:56,962 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-10-04 14:29:56,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-04 14:29:56,962 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-10-04 14:29:56,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-04 14:29:56,963 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:56,963 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 36, 1, 1, 1, 1] [2018-10-04 14:29:56,963 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:56,963 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:56,963 INFO L82 PathProgramCache]: Analyzing trace with hash 878185947, now seen corresponding path program 72 times [2018-10-04 14:29:56,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:56,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:56,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:56,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:56,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:56,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:57,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:57,891 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:57,891 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:29:57,898 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:29:58,028 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-10-04 14:29:58,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:58,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:58,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:58,313 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:58,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2018-10-04 14:29:58,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 14:29:58,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 14:29:58,314 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:58,314 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 43 states. [2018-10-04 14:29:59,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:59,343 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2018-10-04 14:29:59,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-04 14:29:59,343 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 152 [2018-10-04 14:29:59,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:59,344 INFO L225 Difference]: With dead ends: 161 [2018-10-04 14:29:59,345 INFO L226 Difference]: Without dead ends: 159 [2018-10-04 14:29:59,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.2s impTime 77 [2018-10-04 14:29:59,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-04 14:29:59,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2018-10-04 14:29:59,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-04 14:29:59,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-10-04 14:29:59,379 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2018-10-04 14:29:59,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:59,379 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-10-04 14:29:59,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 14:29:59,380 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-10-04 14:29:59,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-04 14:29:59,380 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:59,380 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-10-04 14:29:59,380 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:59,380 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:59,381 INFO L82 PathProgramCache]: Analyzing trace with hash 2123038295, now seen corresponding path program 73 times [2018-10-04 14:29:59,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:59,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:59,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:59,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:59,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:59,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:00,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:00,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:00,948 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 14:30:00,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:30:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:01,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:01,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:01,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:01,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-04 14:30:01,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 14:30:01,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 14:30:01,324 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:01,324 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 78 states. [2018-10-04 14:30:04,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:04,524 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2018-10-04 14:30:04,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-04 14:30:04,524 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-10-04 14:30:04,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:04,525 INFO L225 Difference]: With dead ends: 236 [2018-10-04 14:30:04,525 INFO L226 Difference]: Without dead ends: 157 [2018-10-04 14:30:04,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.3s impTime 77 [2018-10-04 14:30:04,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-04 14:30:04,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-04 14:30:04,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-04 14:30:04,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2018-10-04 14:30:04,559 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2018-10-04 14:30:04,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:04,560 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2018-10-04 14:30:04,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 14:30:04,560 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2018-10-04 14:30:04,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-04 14:30:04,560 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:04,560 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 37, 1, 1, 1, 1] [2018-10-04 14:30:04,561 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:04,561 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:04,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1034359663, now seen corresponding path program 74 times [2018-10-04 14:30:04,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:04,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:04,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:04,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:30:04,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:04,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:05,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:05,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:05,216 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:30:05,223 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:30:05,315 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:30:05,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:05,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:05,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:05,615 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:05,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-10-04 14:30:05,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 14:30:05,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 14:30:05,616 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:05,616 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 44 states. [2018-10-04 14:30:06,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:06,689 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2018-10-04 14:30:06,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-04 14:30:06,690 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 156 [2018-10-04 14:30:06,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:06,691 INFO L225 Difference]: With dead ends: 165 [2018-10-04 14:30:06,691 INFO L226 Difference]: Without dead ends: 163 [2018-10-04 14:30:06,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.0s impTime 79 [2018-10-04 14:30:06,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-04 14:30:06,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-10-04 14:30:06,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-04 14:30:06,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2018-10-04 14:30:06,734 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2018-10-04 14:30:06,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:06,734 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2018-10-04 14:30:06,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 14:30:06,734 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2018-10-04 14:30:06,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-04 14:30:06,735 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:06,735 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1] [2018-10-04 14:30:06,735 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:06,735 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:06,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1882257523, now seen corresponding path program 75 times [2018-10-04 14:30:06,735 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:06,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:06,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:06,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:06,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:06,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:08,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:08,923 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 14:30:08,931 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:30:09,066 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-04 14:30:09,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:09,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:09,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:09,348 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:09,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-04 14:30:09,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 14:30:09,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 14:30:09,349 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:09,349 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 80 states. [2018-10-04 14:30:12,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:12,501 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2018-10-04 14:30:12,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-04 14:30:12,501 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-10-04 14:30:12,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:12,502 INFO L225 Difference]: With dead ends: 242 [2018-10-04 14:30:12,502 INFO L226 Difference]: Without dead ends: 161 [2018-10-04 14:30:12,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time 3.0s impTime 79 [2018-10-04 14:30:12,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-04 14:30:12,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-10-04 14:30:12,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-04 14:30:12,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-10-04 14:30:12,543 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 158 [2018-10-04 14:30:12,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:12,543 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-10-04 14:30:12,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 14:30:12,543 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-10-04 14:30:12,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-04 14:30:12,544 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:12,544 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 38, 1, 1, 1, 1] [2018-10-04 14:30:12,545 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:12,545 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:12,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1109870791, now seen corresponding path program 76 times [2018-10-04 14:30:12,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:12,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:12,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:12,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:12,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:13,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:13,328 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 14:30:13,337 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:30:13,432 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:30:13,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:13,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:13,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:13,736 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:13,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2018-10-04 14:30:13,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 14:30:13,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 14:30:13,737 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:13,737 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 45 states. [2018-10-04 14:30:14,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:14,853 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2018-10-04 14:30:14,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-04 14:30:14,853 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 160 [2018-10-04 14:30:14,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:14,855 INFO L225 Difference]: With dead ends: 169 [2018-10-04 14:30:14,855 INFO L226 Difference]: Without dead ends: 167 [2018-10-04 14:30:14,855 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.1s impTime 81 [2018-10-04 14:30:14,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-04 14:30:14,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2018-10-04 14:30:14,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-04 14:30:14,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-10-04 14:30:14,894 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2018-10-04 14:30:14,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:14,895 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-10-04 14:30:14,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 14:30:14,895 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-10-04 14:30:14,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-04 14:30:14,896 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:14,896 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-10-04 14:30:14,896 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:14,896 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:14,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1433873987, now seen corresponding path program 77 times [2018-10-04 14:30:14,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:14,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:14,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:14,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:14,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:14,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:16,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:16,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:16,578 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 14:30:16,586 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:30:16,728 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-04 14:30:16,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:16,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:17,040 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:17,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-04 14:30:17,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-04 14:30:17,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-04 14:30:17,041 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:17,041 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 82 states. [2018-10-04 14:30:20,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:20,534 INFO L93 Difference]: Finished difference Result 248 states and 250 transitions. [2018-10-04 14:30:20,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-04 14:30:20,534 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-10-04 14:30:20,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:20,535 INFO L225 Difference]: With dead ends: 248 [2018-10-04 14:30:20,535 INFO L226 Difference]: Without dead ends: 165 [2018-10-04 14:30:20,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time 2.5s impTime 81 [2018-10-04 14:30:20,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-04 14:30:20,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-04 14:30:20,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-04 14:30:20,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-10-04 14:30:20,572 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2018-10-04 14:30:20,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:20,572 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-10-04 14:30:20,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-04 14:30:20,572 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-10-04 14:30:20,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-04 14:30:20,573 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:20,573 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 39, 1, 1, 1, 1] [2018-10-04 14:30:20,573 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:20,573 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:20,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1292352899, now seen corresponding path program 78 times [2018-10-04 14:30:20,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:20,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:20,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:20,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:20,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:20,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:21,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:21,074 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:21,074 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:30:21,082 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:30:21,223 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2018-10-04 14:30:21,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:21,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:21,619 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:21,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-10-04 14:30:21,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 14:30:21,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 14:30:21,620 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:21,620 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 46 states. [2018-10-04 14:30:22,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:22,659 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2018-10-04 14:30:22,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-04 14:30:22,659 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 164 [2018-10-04 14:30:22,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:22,660 INFO L225 Difference]: With dead ends: 173 [2018-10-04 14:30:22,660 INFO L226 Difference]: Without dead ends: 171 [2018-10-04 14:30:22,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.8s impTime 83 [2018-10-04 14:30:22,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-04 14:30:22,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2018-10-04 14:30:22,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-04 14:30:22,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2018-10-04 14:30:22,703 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 164 [2018-10-04 14:30:22,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:22,703 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2018-10-04 14:30:22,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 14:30:22,703 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2018-10-04 14:30:22,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-04 14:30:22,704 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:22,704 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1] [2018-10-04 14:30:22,704 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:22,705 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:22,705 INFO L82 PathProgramCache]: Analyzing trace with hash -705654151, now seen corresponding path program 79 times [2018-10-04 14:30:22,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:22,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:22,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:22,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:22,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:23,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1640 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:23,982 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:23,982 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:30:23,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:30:24,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:24,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:24,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1640 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:24,382 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:24,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-04 14:30:24,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-04 14:30:24,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-04 14:30:24,384 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:24,384 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 84 states. [2018-10-04 14:30:26,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:26,712 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2018-10-04 14:30:26,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-04 14:30:26,713 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-10-04 14:30:26,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:26,713 INFO L225 Difference]: With dead ends: 254 [2018-10-04 14:30:26,713 INFO L226 Difference]: Without dead ends: 169 [2018-10-04 14:30:26,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.7s impTime 83 [2018-10-04 14:30:26,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-04 14:30:26,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-10-04 14:30:26,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-04 14:30:26,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2018-10-04 14:30:26,753 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 166 [2018-10-04 14:30:26,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:26,753 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2018-10-04 14:30:26,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-04 14:30:26,753 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2018-10-04 14:30:26,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-04 14:30:26,754 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:26,754 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 40, 1, 1, 1, 1] [2018-10-04 14:30:26,754 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:26,754 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:26,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1476855373, now seen corresponding path program 80 times [2018-10-04 14:30:26,755 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:26,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:26,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:26,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:30:26,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:27,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:27,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:27,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:30:27,165 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:30:27,266 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:30:27,266 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:27,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:27,573 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:27,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2018-10-04 14:30:27,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 14:30:27,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 14:30:27,574 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:27,574 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 47 states. [2018-10-04 14:30:28,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:28,788 INFO L93 Difference]: Finished difference Result 177 states and 178 transitions. [2018-10-04 14:30:28,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-04 14:30:28,789 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 168 [2018-10-04 14:30:28,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:28,789 INFO L225 Difference]: With dead ends: 177 [2018-10-04 14:30:28,789 INFO L226 Difference]: Without dead ends: 175 [2018-10-04 14:30:28,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.8s impTime 85 [2018-10-04 14:30:28,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-04 14:30:28,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2018-10-04 14:30:28,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-04 14:30:28,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-10-04 14:30:28,830 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 168 [2018-10-04 14:30:28,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:28,830 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-10-04 14:30:28,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 14:30:28,830 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-10-04 14:30:28,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-04 14:30:28,831 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:28,831 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1] [2018-10-04 14:30:28,831 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:28,831 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:28,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1918872529, now seen corresponding path program 81 times [2018-10-04 14:30:28,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:28,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:28,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:28,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:28,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:28,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:30,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:30,120 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:30,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:30:30,128 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:30:30,289 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-04 14:30:30,289 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:30,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:30,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:30,613 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:30,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-04 14:30:30,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-04 14:30:30,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-04 14:30:30,614 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:30,614 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 86 states. [2018-10-04 14:30:32,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:32,874 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2018-10-04 14:30:32,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-04 14:30:32,874 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-10-04 14:30:32,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:32,875 INFO L225 Difference]: With dead ends: 260 [2018-10-04 14:30:32,875 INFO L226 Difference]: Without dead ends: 173 [2018-10-04 14:30:32,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 1.8s impTime 85 [2018-10-04 14:30:32,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-04 14:30:32,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-10-04 14:30:32,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-04 14:30:32,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2018-10-04 14:30:32,915 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 170 [2018-10-04 14:30:32,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:32,915 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2018-10-04 14:30:32,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-04 14:30:32,915 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2018-10-04 14:30:32,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-04 14:30:32,916 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:32,916 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 41, 1, 1, 1, 1] [2018-10-04 14:30:32,916 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:32,916 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:32,916 INFO L82 PathProgramCache]: Analyzing trace with hash -900821399, now seen corresponding path program 82 times [2018-10-04 14:30:32,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:32,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:32,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:32,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:32,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:33,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:33,427 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:33,427 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:30:33,437 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:30:33,545 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:30:33,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:33,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:33,941 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:33,941 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2018-10-04 14:30:33,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 14:30:33,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 14:30:33,942 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:33,942 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 48 states. [2018-10-04 14:30:35,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:35,044 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2018-10-04 14:30:35,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-04 14:30:35,044 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 172 [2018-10-04 14:30:35,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:35,045 INFO L225 Difference]: With dead ends: 181 [2018-10-04 14:30:35,045 INFO L226 Difference]: Without dead ends: 179 [2018-10-04 14:30:35,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.8s impTime 87 [2018-10-04 14:30:35,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-04 14:30:35,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2018-10-04 14:30:35,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-04 14:30:35,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2018-10-04 14:30:35,095 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 172 [2018-10-04 14:30:35,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:35,095 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2018-10-04 14:30:35,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 14:30:35,095 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2018-10-04 14:30:35,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-04 14:30:35,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:35,096 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1, 1, 1] [2018-10-04 14:30:35,096 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:35,097 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:35,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1893962597, now seen corresponding path program 83 times [2018-10-04 14:30:35,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:35,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:35,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:35,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:35,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:35,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 1806 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:36,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:36,243 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:30:36,251 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:30:36,421 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-04 14:30:36,421 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:36,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 1806 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:36,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:36,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-04 14:30:36,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-04 14:30:36,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-04 14:30:36,743 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:36,744 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand 88 states. [2018-10-04 14:30:39,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:39,367 INFO L93 Difference]: Finished difference Result 266 states and 268 transitions. [2018-10-04 14:30:39,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-04 14:30:39,367 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-10-04 14:30:39,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:39,368 INFO L225 Difference]: With dead ends: 266 [2018-10-04 14:30:39,368 INFO L226 Difference]: Without dead ends: 177 [2018-10-04 14:30:39,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 1.8s impTime 87 [2018-10-04 14:30:39,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-04 14:30:39,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-10-04 14:30:39,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-10-04 14:30:39,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2018-10-04 14:30:39,410 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 174 [2018-10-04 14:30:39,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:39,410 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2018-10-04 14:30:39,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-04 14:30:39,411 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2018-10-04 14:30:39,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-04 14:30:39,411 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:39,412 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 42, 1, 1, 1, 1] [2018-10-04 14:30:39,412 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:39,412 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:39,412 INFO L82 PathProgramCache]: Analyzing trace with hash -619306849, now seen corresponding path program 84 times [2018-10-04 14:30:39,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:39,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:39,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:39,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:39,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:39,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:39,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:39,854 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:30:39,862 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:30:40,032 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-10-04 14:30:40,032 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:40,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:40,359 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:40,359 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2018-10-04 14:30:40,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 14:30:40,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 14:30:40,360 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:40,360 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 49 states. [2018-10-04 14:30:41,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:41,546 INFO L93 Difference]: Finished difference Result 185 states and 186 transitions. [2018-10-04 14:30:41,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-04 14:30:41,546 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 176 [2018-10-04 14:30:41,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:41,548 INFO L225 Difference]: With dead ends: 185 [2018-10-04 14:30:41,548 INFO L226 Difference]: Without dead ends: 183 [2018-10-04 14:30:41,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.8s impTime 89 [2018-10-04 14:30:41,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-04 14:30:41,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2018-10-04 14:30:41,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-04 14:30:41,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2018-10-04 14:30:41,592 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 176 [2018-10-04 14:30:41,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:41,592 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2018-10-04 14:30:41,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 14:30:41,593 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2018-10-04 14:30:41,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-04 14:30:41,594 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:41,594 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1] [2018-10-04 14:30:41,594 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:41,594 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:41,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1846505499, now seen corresponding path program 85 times [2018-10-04 14:30:41,594 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:41,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:41,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:41,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:41,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:42,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:42,974 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:30:42,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:30:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:43,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:43,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:43,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:43,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-04 14:30:43,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-04 14:30:43,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-04 14:30:43,412 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:43,412 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 90 states. [2018-10-04 14:30:45,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:45,983 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2018-10-04 14:30:45,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-04 14:30:45,983 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-10-04 14:30:45,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:45,984 INFO L225 Difference]: With dead ends: 272 [2018-10-04 14:30:45,984 INFO L226 Difference]: Without dead ends: 181 [2018-10-04 14:30:45,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 1.9s impTime 89 [2018-10-04 14:30:45,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-04 14:30:46,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-04 14:30:46,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-04 14:30:46,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2018-10-04 14:30:46,028 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 178 [2018-10-04 14:30:46,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:46,028 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2018-10-04 14:30:46,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-04 14:30:46,028 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2018-10-04 14:30:46,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-04 14:30:46,029 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:46,029 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 43, 1, 1, 1, 1] [2018-10-04 14:30:46,029 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:46,029 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:46,030 INFO L82 PathProgramCache]: Analyzing trace with hash 895799381, now seen corresponding path program 86 times [2018-10-04 14:30:46,030 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:46,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:46,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:46,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:30:46,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:46,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:46,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:46,444 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:46,444 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:30:46,451 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:30:46,556 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:30:46,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:46,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:46,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:46,884 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:46,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2018-10-04 14:30:46,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 14:30:46,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 14:30:46,885 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:46,885 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand 50 states. [2018-10-04 14:30:48,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:48,009 INFO L93 Difference]: Finished difference Result 189 states and 190 transitions. [2018-10-04 14:30:48,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-04 14:30:48,009 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 180 [2018-10-04 14:30:48,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:48,010 INFO L225 Difference]: With dead ends: 189 [2018-10-04 14:30:48,011 INFO L226 Difference]: Without dead ends: 187 [2018-10-04 14:30:48,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.8s impTime 91 [2018-10-04 14:30:48,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-04 14:30:48,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2018-10-04 14:30:48,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-04 14:30:48,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2018-10-04 14:30:48,060 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 180 [2018-10-04 14:30:48,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:48,060 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2018-10-04 14:30:48,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 14:30:48,060 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2018-10-04 14:30:48,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-04 14:30:48,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:48,061 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 1, 1, 1, 1] [2018-10-04 14:30:48,061 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:48,061 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:48,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1869679185, now seen corresponding path program 87 times [2018-10-04 14:30:48,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:48,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:48,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:48,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:48,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:49,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1980 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:49,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:49,640 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:30:49,649 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:30:49,830 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-10-04 14:30:49,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:49,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:50,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1980 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:50,164 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:50,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-04 14:30:50,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-04 14:30:50,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-04 14:30:50,165 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:50,165 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand 92 states. [2018-10-04 14:30:52,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:52,873 INFO L93 Difference]: Finished difference Result 278 states and 280 transitions. [2018-10-04 14:30:52,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-04 14:30:52,873 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-10-04 14:30:52,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:52,874 INFO L225 Difference]: With dead ends: 278 [2018-10-04 14:30:52,874 INFO L226 Difference]: Without dead ends: 185 [2018-10-04 14:30:52,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.2s impTime 91 [2018-10-04 14:30:52,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-04 14:30:52,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-10-04 14:30:52,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-04 14:30:52,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2018-10-04 14:30:52,920 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 182 [2018-10-04 14:30:52,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:52,920 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2018-10-04 14:30:52,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-04 14:30:52,920 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2018-10-04 14:30:52,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-04 14:30:52,921 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:52,921 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 44, 1, 1, 1, 1] [2018-10-04 14:30:52,921 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:52,921 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:52,921 INFO L82 PathProgramCache]: Analyzing trace with hash -800604789, now seen corresponding path program 88 times [2018-10-04 14:30:52,921 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:52,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:52,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:52,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:52,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:52,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:53,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:53,432 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:53,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:30:53,440 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:30:53,570 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:30:53,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:53,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:54,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:54,060 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:54,060 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 50 [2018-10-04 14:30:54,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 14:30:54,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 14:30:54,061 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:54,061 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand 51 states. [2018-10-04 14:30:55,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:55,228 INFO L93 Difference]: Finished difference Result 193 states and 194 transitions. [2018-10-04 14:30:55,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-04 14:30:55,228 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 184 [2018-10-04 14:30:55,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:55,229 INFO L225 Difference]: With dead ends: 193 [2018-10-04 14:30:55,229 INFO L226 Difference]: Without dead ends: 191 [2018-10-04 14:30:55,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 0.8s impTime 93 [2018-10-04 14:30:55,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-04 14:30:55,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 187. [2018-10-04 14:30:55,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-04 14:30:55,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2018-10-04 14:30:55,282 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 184 [2018-10-04 14:30:55,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:55,282 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2018-10-04 14:30:55,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 14:30:55,282 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2018-10-04 14:30:55,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-04 14:30:55,283 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:55,283 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1] [2018-10-04 14:30:55,283 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:55,283 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:55,283 INFO L82 PathProgramCache]: Analyzing trace with hash -582123001, now seen corresponding path program 89 times [2018-10-04 14:30:55,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:55,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:55,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:55,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:55,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:56,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:56,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:56,777 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:30:56,784 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:30:56,962 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-04 14:30:56,962 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:56,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:57,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:57,295 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:57,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-04 14:30:57,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-04 14:30:57,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-04 14:30:57,296 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:57,296 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 94 states. [2018-10-04 14:31:00,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:31:00,139 INFO L93 Difference]: Finished difference Result 284 states and 286 transitions. [2018-10-04 14:31:00,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-04 14:31:00,139 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-10-04 14:31:00,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:31:00,140 INFO L225 Difference]: With dead ends: 284 [2018-10-04 14:31:00,140 INFO L226 Difference]: Without dead ends: 189 [2018-10-04 14:31:00,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.1s impTime 93 [2018-10-04 14:31:00,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-04 14:31:00,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-10-04 14:31:00,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-04 14:31:00,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2018-10-04 14:31:00,188 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 186 [2018-10-04 14:31:00,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:31:00,188 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2018-10-04 14:31:00,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-04 14:31:00,188 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2018-10-04 14:31:00,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-04 14:31:00,188 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:31:00,189 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 45, 1, 1, 1, 1] [2018-10-04 14:31:00,189 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:31:00,189 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:31:00,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1060894655, now seen corresponding path program 90 times [2018-10-04 14:31:00,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:31:00,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:31:00,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:00,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:31:00,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:00,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:31:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:00,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:31:00,754 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:31:00,763 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:31:00,945 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2018-10-04 14:31:00,945 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:31:00,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:31:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:01,329 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:31:01,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2018-10-04 14:31:01,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 14:31:01,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 14:31:01,330 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:31:01,330 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand 52 states. [2018-10-04 14:31:02,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:31:02,665 INFO L93 Difference]: Finished difference Result 197 states and 198 transitions. [2018-10-04 14:31:02,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-04 14:31:02,666 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 188 [2018-10-04 14:31:02,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:31:02,667 INFO L225 Difference]: With dead ends: 197 [2018-10-04 14:31:02,667 INFO L226 Difference]: Without dead ends: 195 [2018-10-04 14:31:02,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.1s impTime 95 [2018-10-04 14:31:02,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-04 14:31:02,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 191. [2018-10-04 14:31:02,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-04 14:31:02,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2018-10-04 14:31:02,717 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 188 [2018-10-04 14:31:02,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:31:02,717 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2018-10-04 14:31:02,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 14:31:02,718 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2018-10-04 14:31:02,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-04 14:31:02,718 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:31:02,718 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 1, 1, 1, 1] [2018-10-04 14:31:02,718 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:31:02,719 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:31:02,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1612581059, now seen corresponding path program 91 times [2018-10-04 14:31:02,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:31:02,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:31:02,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:02,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:31:02,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:02,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:31:04,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2162 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:04,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:31:04,172 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:31:04,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:31:04,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:31:04,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:31:04,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2162 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:04,672 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:31:04,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-04 14:31:04,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-04 14:31:04,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-04 14:31:04,673 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:31:04,673 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand 96 states. [2018-10-04 14:31:07,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:31:07,455 INFO L93 Difference]: Finished difference Result 290 states and 292 transitions. [2018-10-04 14:31:07,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-04 14:31:07,455 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-10-04 14:31:07,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:31:07,456 INFO L225 Difference]: With dead ends: 290 [2018-10-04 14:31:07,456 INFO L226 Difference]: Without dead ends: 193 [2018-10-04 14:31:07,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.0s impTime 95 [2018-10-04 14:31:07,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-04 14:31:07,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-10-04 14:31:07,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-04 14:31:07,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2018-10-04 14:31:07,507 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 190 [2018-10-04 14:31:07,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:31:07,507 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2018-10-04 14:31:07,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-04 14:31:07,507 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2018-10-04 14:31:07,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-04 14:31:07,508 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:31:07,508 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 46, 1, 1, 1, 1] [2018-10-04 14:31:07,508 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:31:07,508 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:31:07,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1003933815, now seen corresponding path program 92 times [2018-10-04 14:31:07,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:31:07,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:31:07,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:07,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:31:07,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:31:08,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2256 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:08,116 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:31:08,116 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:31:08,134 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:31:08,253 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:31:08,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:31:08,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:31:08,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2256 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:08,608 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:31:08,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2018-10-04 14:31:08,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 14:31:08,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 14:31:08,609 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:31:08,609 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand 53 states. [2018-10-04 14:31:10,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:31:10,176 INFO L93 Difference]: Finished difference Result 201 states and 202 transitions. [2018-10-04 14:31:10,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-04 14:31:10,177 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 192 [2018-10-04 14:31:10,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:31:10,178 INFO L225 Difference]: With dead ends: 201 [2018-10-04 14:31:10,178 INFO L226 Difference]: Without dead ends: 199 [2018-10-04 14:31:10,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.3s impTime 97 [2018-10-04 14:31:10,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-04 14:31:10,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2018-10-04 14:31:10,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-04 14:31:10,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2018-10-04 14:31:10,232 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 192 [2018-10-04 14:31:10,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:31:10,232 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2018-10-04 14:31:10,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 14:31:10,232 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2018-10-04 14:31:10,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-04 14:31:10,233 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:31:10,233 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1] [2018-10-04 14:31:10,233 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:31:10,233 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:31:10,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1587312141, now seen corresponding path program 93 times [2018-10-04 14:31:10,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:31:10,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:31:10,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:10,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:31:10,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:10,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:31:11,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:11,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:31:11,793 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:31:11,800 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:31:11,997 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-10-04 14:31:11,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:31:12,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:31:12,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:12,344 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:31:12,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-04 14:31:12,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-04 14:31:12,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-04 14:31:12,345 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:31:12,345 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 98 states. [2018-10-04 14:31:15,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:31:15,475 INFO L93 Difference]: Finished difference Result 296 states and 298 transitions. [2018-10-04 14:31:15,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-04 14:31:15,475 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-10-04 14:31:15,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:31:15,476 INFO L225 Difference]: With dead ends: 296 [2018-10-04 14:31:15,476 INFO L226 Difference]: Without dead ends: 197 [2018-10-04 14:31:15,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.3s impTime 97 [2018-10-04 14:31:15,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-10-04 14:31:15,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-10-04 14:31:15,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-04 14:31:15,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2018-10-04 14:31:15,530 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 194 [2018-10-04 14:31:15,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:31:15,530 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2018-10-04 14:31:15,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-04 14:31:15,530 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2018-10-04 14:31:15,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-04 14:31:15,531 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:31:15,531 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 48, 47, 1, 1, 1, 1] [2018-10-04 14:31:15,531 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:31:15,531 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:31:15,532 INFO L82 PathProgramCache]: Analyzing trace with hash 410334765, now seen corresponding path program 94 times [2018-10-04 14:31:15,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:31:15,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:31:15,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:15,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:31:15,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:15,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:31:16,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:16,120 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:31:16,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:31:16,127 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:31:16,251 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:31:16,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:31:16,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:31:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:16,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:31:16,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2018-10-04 14:31:16,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 14:31:16,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 14:31:16,635 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:31:16,635 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand 54 states. [2018-10-04 14:31:17,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:31:17,899 INFO L93 Difference]: Finished difference Result 205 states and 206 transitions. [2018-10-04 14:31:17,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-04 14:31:17,899 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 196 [2018-10-04 14:31:17,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:31:17,900 INFO L225 Difference]: With dead ends: 205 [2018-10-04 14:31:17,900 INFO L226 Difference]: Without dead ends: 203 [2018-10-04 14:31:17,900 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.0s impTime 99 [2018-10-04 14:31:17,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-04 14:31:17,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2018-10-04 14:31:17,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-04 14:31:17,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2018-10-04 14:31:17,950 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 196 [2018-10-04 14:31:17,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:31:17,950 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2018-10-04 14:31:17,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 14:31:17,950 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2018-10-04 14:31:17,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-04 14:31:17,951 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:31:17,951 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 1, 1, 1, 1] [2018-10-04 14:31:17,951 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:31:17,951 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:31:17,951 INFO L82 PathProgramCache]: Analyzing trace with hash -805348823, now seen corresponding path program 95 times [2018-10-04 14:31:17,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:31:17,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:31:17,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:17,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:31:17,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:17,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:31:19,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2352 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:19,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:31:19,288 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:31:19,301 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:31:19,510 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-04 14:31:19,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:31:19,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:31:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2352 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:19,906 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:31:19,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-04 14:31:19,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-04 14:31:19,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-04 14:31:19,907 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:31:19,907 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand 100 states. [2018-10-04 14:31:22,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:31:22,860 INFO L93 Difference]: Finished difference Result 302 states and 304 transitions. [2018-10-04 14:31:22,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-04 14:31:22,861 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2018-10-04 14:31:22,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:31:22,861 INFO L225 Difference]: With dead ends: 302 [2018-10-04 14:31:22,862 INFO L226 Difference]: Without dead ends: 201 [2018-10-04 14:31:22,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.0s impTime 99 [2018-10-04 14:31:22,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-04 14:31:22,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-10-04 14:31:22,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-10-04 14:31:22,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2018-10-04 14:31:22,917 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 198 [2018-10-04 14:31:22,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:31:22,918 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2018-10-04 14:31:22,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-04 14:31:22,918 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2018-10-04 14:31:22,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-04 14:31:22,918 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:31:22,919 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 49, 48, 1, 1, 1, 1] [2018-10-04 14:31:22,919 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:31:22,919 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:31:22,919 INFO L82 PathProgramCache]: Analyzing trace with hash -779331229, now seen corresponding path program 96 times [2018-10-04 14:31:22,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:31:22,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:31:22,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:22,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:31:22,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:22,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:31:23,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:23,464 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:31:23,464 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:31:23,473 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:31:23,686 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-10-04 14:31:23,687 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:31:23,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:31:24,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:24,060 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:31:24,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 54 [2018-10-04 14:31:24,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 14:31:24,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 14:31:24,061 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:31:24,061 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand 55 states. [2018-10-04 14:31:25,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:31:25,641 INFO L93 Difference]: Finished difference Result 209 states and 210 transitions. [2018-10-04 14:31:25,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-04 14:31:25,641 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 200 [2018-10-04 14:31:25,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:31:25,642 INFO L225 Difference]: With dead ends: 209 [2018-10-04 14:31:25,642 INFO L226 Difference]: Without dead ends: 207 [2018-10-04 14:31:25,643 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.2s impTime 101 [2018-10-04 14:31:25,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-10-04 14:31:25,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 203. [2018-10-04 14:31:25,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-04 14:31:25,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2018-10-04 14:31:25,696 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 200 [2018-10-04 14:31:25,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:31:25,697 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2018-10-04 14:31:25,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 14:31:25,697 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2018-10-04 14:31:25,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-04 14:31:25,697 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:31:25,698 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1, 1, 1] [2018-10-04 14:31:25,698 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:31:25,698 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:31:25,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1613068321, now seen corresponding path program 97 times [2018-10-04 14:31:25,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:31:25,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:31:25,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:25,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:31:25,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:31:27,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2450 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:27,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:31:27,030 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:31:27,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:31:27,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:31:27,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:31:27,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2450 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:27,529 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:31:27,529 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-04 14:31:27,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-04 14:31:27,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-04 14:31:27,530 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:31:27,530 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand 102 states. [2018-10-04 14:31:30,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:31:30,865 INFO L93 Difference]: Finished difference Result 308 states and 310 transitions. [2018-10-04 14:31:30,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-04 14:31:30,865 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 202 [2018-10-04 14:31:30,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:31:30,866 INFO L225 Difference]: With dead ends: 308 [2018-10-04 14:31:30,866 INFO L226 Difference]: Without dead ends: 205 [2018-10-04 14:31:30,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.1s impTime 101 [2018-10-04 14:31:30,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-10-04 14:31:30,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-10-04 14:31:30,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-10-04 14:31:30,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2018-10-04 14:31:30,925 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 202 [2018-10-04 14:31:30,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:31:30,925 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2018-10-04 14:31:30,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-04 14:31:30,926 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2018-10-04 14:31:30,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-10-04 14:31:30,926 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:31:30,926 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 50, 49, 1, 1, 1, 1] [2018-10-04 14:31:30,926 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:31:30,927 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:31:30,927 INFO L82 PathProgramCache]: Analyzing trace with hash 134306329, now seen corresponding path program 98 times [2018-10-04 14:31:30,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:31:30,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:31:30,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:30,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:31:30,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:31:31,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 2550 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:31,655 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:31:31,656 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:31:31,663 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:31:31,786 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:31:31,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:31:31,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:31:32,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 2550 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:32,164 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:31:32,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 55 [2018-10-04 14:31:32,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 14:31:32,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 14:31:32,165 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:31:32,165 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand 56 states. [2018-10-04 14:31:33,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:31:33,553 INFO L93 Difference]: Finished difference Result 213 states and 214 transitions. [2018-10-04 14:31:33,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-04 14:31:33,553 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 204 [2018-10-04 14:31:33,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:31:33,555 INFO L225 Difference]: With dead ends: 213 [2018-10-04 14:31:33,555 INFO L226 Difference]: Without dead ends: 211 [2018-10-04 14:31:33,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.1s impTime 103 [2018-10-04 14:31:33,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-04 14:31:33,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 207. [2018-10-04 14:31:33,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-10-04 14:31:33,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2018-10-04 14:31:33,615 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 204 [2018-10-04 14:31:33,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:31:33,615 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2018-10-04 14:31:33,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 14:31:33,615 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2018-10-04 14:31:33,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-04 14:31:33,616 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:31:33,616 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 1, 1, 1, 1] [2018-10-04 14:31:33,616 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:31:33,616 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:31:33,617 INFO L82 PathProgramCache]: Analyzing trace with hash 219296533, now seen corresponding path program 99 times [2018-10-04 14:31:33,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:31:33,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:31:33,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:33,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:31:33,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:31:35,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2550 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:35,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:31:35,435 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:31:35,444 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:31:35,660 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-10-04 14:31:35,660 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:31:35,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:31:36,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2550 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:36,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:31:36,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-04 14:31:36,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-04 14:31:36,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-04 14:31:36,064 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:31:36,064 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand 104 states. [2018-10-04 14:31:39,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:31:39,024 INFO L93 Difference]: Finished difference Result 314 states and 316 transitions. [2018-10-04 14:31:39,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-04 14:31:39,024 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 206 [2018-10-04 14:31:39,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:31:39,025 INFO L225 Difference]: With dead ends: 314 [2018-10-04 14:31:39,025 INFO L226 Difference]: Without dead ends: 209 [2018-10-04 14:31:39,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time 2.4s impTime 103 [2018-10-04 14:31:39,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-10-04 14:31:39,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-10-04 14:31:39,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-10-04 14:31:39,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 210 transitions. [2018-10-04 14:31:39,101 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 210 transitions. Word has length 206 [2018-10-04 14:31:39,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:31:39,101 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 210 transitions. [2018-10-04 14:31:39,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-04 14:31:39,101 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 210 transitions. [2018-10-04 14:31:39,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-04 14:31:39,102 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:31:39,102 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 51, 50, 1, 1, 1, 1] [2018-10-04 14:31:39,102 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:31:39,103 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:31:39,103 INFO L82 PathProgramCache]: Analyzing trace with hash -2068752305, now seen corresponding path program 100 times [2018-10-04 14:31:39,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:31:39,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:31:39,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:39,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:31:39,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:39,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-04 14:31:39,384 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 14:31:39,389 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 14:31:39,390 INFO L202 PluginConnector]: Adding new model down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 02:31:39 BoogieIcfgContainer [2018-10-04 14:31:39,390 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 14:31:39,391 INFO L168 Benchmark]: Toolchain (without parser) took 234666.42 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 5.2 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 109.2 MB). Peak memory consumption was 114.4 MB. Max. memory is 7.1 GB. [2018-10-04 14:31:39,393 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 14:31:39,393 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.09 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 14:31:39,394 INFO L168 Benchmark]: Boogie Preprocessor took 21.83 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 14:31:39,394 INFO L168 Benchmark]: RCFGBuilder took 374.30 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 14:31:39,395 INFO L168 Benchmark]: TraceAbstraction took 234225.05 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 5.2 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 88.0 MB). Peak memory consumption was 93.3 MB. Max. memory is 7.1 GB. [2018-10-04 14:31:39,398 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.09 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.83 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 374.30 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 234225.05 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 5.2 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 88.0 MB). Peak memory consumption was 93.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 66). Cancelled while BasicCegarLoop was analyzing trace of length 209 with TraceHistMax 52, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while NestedInterpolantsBuilder was constructing predicates for 207 interpolants. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 234.1s OverallTime, 102 OverallIterations, 52 TraceHistogramMax, 116.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1731 SDtfs, 1082 SDslu, 8280 SDs, 0 SdLazy, 78079 SolverSat, 5564 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 44.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18646 GetRequests, 11870 SyntacticMatches, 0 SemanticMatches, 6776 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 145.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=209occurred in iteration=101, 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: 2.4s AutomataMinimizationTime, 101 MinimizatonAttempts, 200 StatesRemovedByMinimization, 50 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.5s SsaConstructionTime, 8.3s SatisfiabilityAnalysisTime, 100.2s InterpolantComputationTime, 21398 NumberOfCodeBlocks, 21398 NumberOfCodeBlocksAsserted, 1507 NumberOfCheckSat, 21198 ConstructedInterpolants, 0 QuantifiedInterpolants, 8724709 SizeOfPredicates, 297 NumberOfNonLiveVariables, 42274 ConjunctsInSsa, 5592 ConjunctsInUnsatCore, 200 InterpolantComputations, 2 PerfectInterpolantSequences, 176798/348498 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/down.i_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_14-31-39-408.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/down.i_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_14-31-39-408.csv Completed graceful shutdown