java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested1.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 23:37:34,450 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 23:37:34,452 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 23:37:34,464 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 23:37:34,465 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 23:37:34,466 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 23:37:34,467 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 23:37:34,469 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 23:37:34,470 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 23:37:34,471 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 23:37:34,472 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 23:37:34,497 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 23:37:34,512 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 23:37:34,512 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 23:37:34,513 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 23:37:34,513 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 23:37:34,514 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 23:37:34,514 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 23:37:34,514 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 23:37:34,514 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 23:37:34,515 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 23:37:34,515 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 23:37:34,515 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 23:37:34,515 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 23:37:34,515 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 23:37:34,516 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 23:37:34,516 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 23:37:34,516 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 23:37:34,516 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 23:37:34,516 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 23:37:34,517 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 23:37:34,517 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 23:37:34,517 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 23:37:34,517 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 23:37:34,517 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:37:34,517 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 23:37:34,518 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 23:37:34,518 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 23:37:34,518 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 23:37:34,518 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 23:37:34,518 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 23:37:34,519 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 23:37:34,561 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 23:37:34,574 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 23:37:34,577 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 23:37:34,579 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 23:37:34,580 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 23:37:34,580 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested1.i_4.bpl [2018-09-30 23:37:34,581 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested1.i_4.bpl' [2018-09-30 23:37:34,648 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 23:37:34,652 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 23:37:34,653 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 23:37:34,653 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 23:37:34,653 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 23:37:34,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:37:34" (1/1) ... [2018-09-30 23:37:34,686 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:37:34" (1/1) ... [2018-09-30 23:37:34,692 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 23:37:34,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 23:37:34,693 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 23:37:34,694 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 23:37:34,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:37:34" (1/1) ... [2018-09-30 23:37:34,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:37:34" (1/1) ... [2018-09-30 23:37:34,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:37:34" (1/1) ... [2018-09-30 23:37:34,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:37:34" (1/1) ... [2018-09-30 23:37:34,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:37:34" (1/1) ... [2018-09-30 23:37:34,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:37:34" (1/1) ... [2018-09-30 23:37:34,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:37:34" (1/1) ... [2018-09-30 23:37:34,716 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 23:37:34,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 23:37:34,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 23:37:34,717 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 23:37:34,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:37:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:37:34,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 23:37:34,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 23:37:35,086 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 23:37:35,088 INFO L202 PluginConnector]: Adding new model nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:37:35 BoogieIcfgContainer [2018-09-30 23:37:35,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 23:37:35,090 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 23:37:35,090 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 23:37:35,098 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 23:37:35,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:37:34" (1/2) ... [2018-09-30 23:37:35,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4803caf and model type nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:37:35, skipping insertion in model container [2018-09-30 23:37:35,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:37:35" (2/2) ... [2018-09-30 23:37:35,102 INFO L112 eAbstractionObserver]: Analyzing ICFG nested1.i_4.bpl [2018-09-30 23:37:35,114 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 23:37:35,127 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 23:37:35,189 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 23:37:35,189 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 23:37:35,190 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 23:37:35,190 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 23:37:35,190 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 23:37:35,190 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 23:37:35,190 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 23:37:35,191 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 23:37:35,191 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 23:37:35,209 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-30 23:37:35,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 23:37:35,225 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:35,226 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 23:37:35,228 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:35,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:35,236 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-30 23:37:35,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:35,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:35,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:35,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:37:35,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:35,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:35,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:35,413 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:37:35,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 23:37:35,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 23:37:35,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 23:37:35,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:37:35,436 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-30 23:37:35,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:35,518 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-09-30 23:37:35,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 23:37:35,520 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-30 23:37:35,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:35,532 INFO L225 Difference]: With dead ends: 17 [2018-09-30 23:37:35,532 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 23:37:35,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:37:35,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 23:37:35,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2018-09-30 23:37:35,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 23:37:35,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-30 23:37:35,572 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 4 [2018-09-30 23:37:35,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:35,572 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-30 23:37:35,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 23:37:35,572 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-30 23:37:35,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:37:35,573 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:35,573 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-30 23:37:35,574 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:35,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:35,574 INFO L82 PathProgramCache]: Analyzing trace with hash 209100445, now seen corresponding path program 1 times [2018-09-30 23:37:35,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:35,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:35,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:35,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:37:35,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:35,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:35,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:35,683 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:37:35,684 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 23:37:35,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 23:37:35,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 23:37:35,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:37:35,687 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2018-09-30 23:37:35,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:35,751 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2018-09-30 23:37:35,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 23:37:35,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-09-30 23:37:35,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:35,753 INFO L225 Difference]: With dead ends: 17 [2018-09-30 23:37:35,753 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 23:37:35,754 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:37:35,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 23:37:35,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 23:37:35,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 23:37:35,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-30 23:37:35,758 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-09-30 23:37:35,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:35,759 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-30 23:37:35,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 23:37:35,759 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-30 23:37:35,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:37:35,760 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:35,760 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 23:37:35,760 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:35,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:35,761 INFO L82 PathProgramCache]: Analyzing trace with hash -850198025, now seen corresponding path program 1 times [2018-09-30 23:37:35,761 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:35,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:35,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:35,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:37:35,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:35,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:35,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:35,865 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:37:35,865 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:37:35,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:37:35,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:35,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:36,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:36,081 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:37:36,081 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-09-30 23:37:36,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:37:36,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:37:36,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:37:36,083 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2018-09-30 23:37:36,384 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-30 23:37:36,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:36,555 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2018-09-30 23:37:36,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:37:36,556 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-09-30 23:37:36,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:36,557 INFO L225 Difference]: With dead ends: 35 [2018-09-30 23:37:36,557 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 23:37:36,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:37:36,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 23:37:36,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2018-09-30 23:37:36,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 23:37:36,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-09-30 23:37:36,566 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2018-09-30 23:37:36,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:36,567 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-09-30 23:37:36,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:37:36,567 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-09-30 23:37:36,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 23:37:36,568 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:36,568 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 3, 2, 2, 1, 1, 1] [2018-09-30 23:37:36,572 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:36,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:36,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1881088987, now seen corresponding path program 2 times [2018-09-30 23:37:36,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:36,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:36,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:36,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:37:36,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:36,689 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-09-30 23:37:36,689 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:37:36,689 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 [2018-09-30 23:37:36,707 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:37:36,744 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:37:36,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:37:36,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:36,889 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-09-30 23:37:36,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:37:36,925 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2018-09-30 23:37:36,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:37:36,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:37:36,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:37:36,929 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 8 states. [2018-09-30 23:37:37,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:37,355 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2018-09-30 23:37:37,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:37:37,357 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-09-30 23:37:37,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:37,358 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:37:37,358 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:37:37,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:37:37,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:37:37,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2018-09-30 23:37:37,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 23:37:37,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2018-09-30 23:37:37,370 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 20 [2018-09-30 23:37:37,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:37,370 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2018-09-30 23:37:37,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:37:37,371 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2018-09-30 23:37:37,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 23:37:37,372 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:37,372 INFO L375 BasicCegarLoop]: trace histogram [12, 9, 4, 3, 3, 1, 1, 1] [2018-09-30 23:37:37,372 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:37,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:37,373 INFO L82 PathProgramCache]: Analyzing trace with hash 501354739, now seen corresponding path program 3 times [2018-09-30 23:37:37,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:37,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:37,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:37,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:37:37,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:37,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-09-30 23:37:37,529 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:37:37,529 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:37:37,543 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:37:37,566 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-30 23:37:37,566 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:37:37,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:37,602 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-09-30 23:37:37,624 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:37:37,624 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:37:37,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:37:37,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:37:37,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:37:37,626 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 6 states. [2018-09-30 23:37:37,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:37,975 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2018-09-30 23:37:37,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:37:37,977 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2018-09-30 23:37:37,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:37,979 INFO L225 Difference]: With dead ends: 65 [2018-09-30 23:37:37,980 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:37:37,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:37:37,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:37:37,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 23:37:37,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 23:37:37,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-09-30 23:37:37,992 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 34 [2018-09-30 23:37:37,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:37,992 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-09-30 23:37:37,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:37:37,993 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-09-30 23:37:37,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 23:37:37,994 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:37,994 INFO L375 BasicCegarLoop]: trace histogram [15, 12, 4, 3, 3, 1, 1, 1] [2018-09-30 23:37:37,994 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:37,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:37,995 INFO L82 PathProgramCache]: Analyzing trace with hash 209827969, now seen corresponding path program 4 times [2018-09-30 23:37:37,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:37,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:37,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:37,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:37:37,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:38,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-09-30 23:37:38,191 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:37:38,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:37:38,205 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:37:38,240 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:37:38,240 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:37:38,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:38,460 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-09-30 23:37:38,492 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:37:38,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 9 [2018-09-30 23:37:38,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:37:38,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:37:38,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:37:38,494 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 10 states. [2018-09-30 23:37:38,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:38,658 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2018-09-30 23:37:38,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:37:38,659 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2018-09-30 23:37:38,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:38,660 INFO L225 Difference]: With dead ends: 65 [2018-09-30 23:37:38,660 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 23:37:38,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:37:38,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 23:37:38,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2018-09-30 23:37:38,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 23:37:38,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2018-09-30 23:37:38,675 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 40 [2018-09-30 23:37:38,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:38,675 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2018-09-30 23:37:38,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:37:38,675 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2018-09-30 23:37:38,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 23:37:38,677 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:38,677 INFO L375 BasicCegarLoop]: trace histogram [20, 16, 5, 4, 4, 1, 1, 1] [2018-09-30 23:37:38,678 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:38,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:38,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1874565441, now seen corresponding path program 5 times [2018-09-30 23:37:38,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:38,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:38,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:38,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:37:38,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:38,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-09-30 23:37:38,956 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:37:38,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:37:38,971 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:37:39,004 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 23:37:39,004 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:37:39,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:39,142 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 262 proven. 20 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2018-09-30 23:37:39,165 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:37:39,165 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2018-09-30 23:37:39,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:37:39,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:37:39,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:37:39,167 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 12 states. [2018-09-30 23:37:40,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:40,298 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2018-09-30 23:37:40,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 23:37:40,299 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2018-09-30 23:37:40,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:40,300 INFO L225 Difference]: With dead ends: 127 [2018-09-30 23:37:40,300 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 23:37:40,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=1211, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:37:40,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 23:37:40,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2018-09-30 23:37:40,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 23:37:40,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2018-09-30 23:37:40,319 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 52 [2018-09-30 23:37:40,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:40,320 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2018-09-30 23:37:40,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:37:40,320 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2018-09-30 23:37:40,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 23:37:40,322 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:40,322 INFO L375 BasicCegarLoop]: trace histogram [30, 25, 6, 5, 5, 1, 1, 1] [2018-09-30 23:37:40,323 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:40,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:40,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1734028097, now seen corresponding path program 6 times [2018-09-30 23:37:40,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:40,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:40,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:40,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:37:40,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2018-09-30 23:37:40,516 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:37:40,516 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:37:40,526 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:37:40,624 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-09-30 23:37:40,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:37:40,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:40,907 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 520 proven. 30 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-09-30 23:37:40,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:37:40,928 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-09-30 23:37:40,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:37:40,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:37:40,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:37:40,930 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand 14 states. [2018-09-30 23:37:42,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:42,407 INFO L93 Difference]: Finished difference Result 175 states and 194 transitions. [2018-09-30 23:37:42,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 23:37:42,411 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2018-09-30 23:37:42,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:42,412 INFO L225 Difference]: With dead ends: 175 [2018-09-30 23:37:42,412 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 23:37:42,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=169, Invalid=2281, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:37:42,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 23:37:42,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 101. [2018-09-30 23:37:42,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 23:37:42,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 107 transitions. [2018-09-30 23:37:42,454 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 107 transitions. Word has length 74 [2018-09-30 23:37:42,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:42,456 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 107 transitions. [2018-09-30 23:37:42,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:37:42,457 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 107 transitions. [2018-09-30 23:37:42,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 23:37:42,460 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:42,460 INFO L375 BasicCegarLoop]: trace histogram [42, 36, 7, 6, 6, 1, 1, 1] [2018-09-30 23:37:42,461 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:42,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:42,461 INFO L82 PathProgramCache]: Analyzing trace with hash 883432563, now seen corresponding path program 7 times [2018-09-30 23:37:42,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:42,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:42,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:42,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:37:42,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:42,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:43,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1512 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-09-30 23:37:43,079 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:37:43,079 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:37:43,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:37:43,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:43,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:43,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1554 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-09-30 23:37:43,738 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:37:43,738 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14] total 14 [2018-09-30 23:37:43,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:37:43,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:37:43,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:37:43,739 INFO L87 Difference]: Start difference. First operand 101 states and 107 transitions. Second operand 15 states. [2018-09-30 23:37:44,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:44,023 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2018-09-30 23:37:44,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 23:37:44,023 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 100 [2018-09-30 23:37:44,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:44,025 INFO L225 Difference]: With dead ends: 133 [2018-09-30 23:37:44,025 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 23:37:44,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:37:44,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 23:37:44,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 117. [2018-09-30 23:37:44,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 23:37:44,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 124 transitions. [2018-09-30 23:37:44,050 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 124 transitions. Word has length 100 [2018-09-30 23:37:44,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:44,050 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 124 transitions. [2018-09-30 23:37:44,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:37:44,051 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 124 transitions. [2018-09-30 23:37:44,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 23:37:44,052 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:44,053 INFO L375 BasicCegarLoop]: trace histogram [49, 42, 8, 7, 7, 1, 1, 1] [2018-09-30 23:37:44,053 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:44,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:44,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1346298395, now seen corresponding path program 8 times [2018-09-30 23:37:44,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:44,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:44,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:44,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:37:44,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:44,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2114 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2018-09-30 23:37:44,435 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:37:44,435 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:37:44,448 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:37:44,494 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:37:44,495 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:37:44,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:44,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2114 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2018-09-30 23:37:44,627 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:37:44,628 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:37:44,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:37:44,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:37:44,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:37:44,629 INFO L87 Difference]: Start difference. First operand 117 states and 124 transitions. Second operand 10 states. [2018-09-30 23:37:44,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:44,808 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2018-09-30 23:37:44,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:37:44,809 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 116 [2018-09-30 23:37:44,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:44,810 INFO L225 Difference]: With dead ends: 149 [2018-09-30 23:37:44,810 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 23:37:44,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:37:44,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 23:37:44,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 133. [2018-09-30 23:37:44,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 23:37:44,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 141 transitions. [2018-09-30 23:37:44,840 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 141 transitions. Word has length 116 [2018-09-30 23:37:44,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:44,841 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 141 transitions. [2018-09-30 23:37:44,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:37:44,841 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 141 transitions. [2018-09-30 23:37:44,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-30 23:37:44,843 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:44,844 INFO L375 BasicCegarLoop]: trace histogram [56, 48, 9, 8, 8, 1, 1, 1] [2018-09-30 23:37:44,844 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:44,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:44,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1851587415, now seen corresponding path program 9 times [2018-09-30 23:37:44,844 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:44,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:44,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:44,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:37:44,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:45,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3152 backedges. 0 proven. 2816 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2018-09-30 23:37:45,123 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:37:45,123 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:37:45,131 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:37:45,189 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 23:37:45,189 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:37:45,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:45,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3152 backedges. 702 proven. 42 refuted. 0 times theorem prover too weak. 2408 trivial. 0 not checked. [2018-09-30 23:37:45,359 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:37:45,359 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2018-09-30 23:37:45,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:37:45,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:37:45,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:37:45,360 INFO L87 Difference]: Start difference. First operand 133 states and 141 transitions. Second operand 18 states. [2018-09-30 23:37:48,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:48,804 INFO L93 Difference]: Finished difference Result 299 states and 327 transitions. [2018-09-30 23:37:48,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 23:37:48,804 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 132 [2018-09-30 23:37:48,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:48,805 INFO L225 Difference]: With dead ends: 299 [2018-09-30 23:37:48,806 INFO L226 Difference]: Without dead ends: 183 [2018-09-30 23:37:48,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1953 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=285, Invalid=6195, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 23:37:48,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-30 23:37:48,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 167. [2018-09-30 23:37:48,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-30 23:37:48,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 176 transitions. [2018-09-30 23:37:48,833 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 176 transitions. Word has length 132 [2018-09-30 23:37:48,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:48,833 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 176 transitions. [2018-09-30 23:37:48,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:37:48,833 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 176 transitions. [2018-09-30 23:37:48,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-30 23:37:48,835 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:48,836 INFO L375 BasicCegarLoop]: trace histogram [72, 63, 10, 9, 9, 1, 1, 1] [2018-09-30 23:37:48,836 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:48,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:48,836 INFO L82 PathProgramCache]: Analyzing trace with hash -132347917, now seen corresponding path program 10 times [2018-09-30 23:37:48,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:48,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:48,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:48,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:37:48,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:49,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 0 proven. 4698 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2018-09-30 23:37:49,288 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:37:49,288 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:37:49,296 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:37:49,352 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:37:49,352 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:37:49,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:49,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 1952 proven. 56 refuted. 0 times theorem prover too weak. 3194 trivial. 0 not checked. [2018-09-30 23:37:49,553 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:37:49,554 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2018-09-30 23:37:49,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:37:49,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:37:49,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:37:49,555 INFO L87 Difference]: Start difference. First operand 167 states and 176 transitions. Second operand 20 states. [2018-09-30 23:37:52,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:52,055 INFO L93 Difference]: Finished difference Result 371 states and 402 transitions. [2018-09-30 23:37:52,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 23:37:52,055 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 166 [2018-09-30 23:37:52,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:52,057 INFO L225 Difference]: With dead ends: 371 [2018-09-30 23:37:52,057 INFO L226 Difference]: Without dead ends: 223 [2018-09-30 23:37:52,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3160 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=357, Invalid=9543, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 23:37:52,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-30 23:37:52,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 205. [2018-09-30 23:37:52,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-30 23:37:52,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 215 transitions. [2018-09-30 23:37:52,086 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 215 transitions. Word has length 166 [2018-09-30 23:37:52,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:52,087 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 215 transitions. [2018-09-30 23:37:52,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:37:52,087 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 215 transitions. [2018-09-30 23:37:52,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-09-30 23:37:52,089 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:52,089 INFO L375 BasicCegarLoop]: trace histogram [90, 80, 11, 10, 10, 1, 1, 1] [2018-09-30 23:37:52,089 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:52,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:52,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1568317117, now seen corresponding path program 11 times [2018-09-30 23:37:52,090 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:52,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:52,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:52,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:37:52,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:52,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:52,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8120 backedges. 0 proven. 7400 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2018-09-30 23:37:52,550 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:37:52,551 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:37:52,558 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:37:52,771 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 23:37:52,771 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:37:52,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:52,973 INFO L134 CoverageAnalysis]: Checked inductivity of 8120 backedges. 3774 proven. 72 refuted. 0 times theorem prover too weak. 4274 trivial. 0 not checked. [2018-09-30 23:37:52,993 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:37:52,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2018-09-30 23:37:52,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:37:52,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:37:52,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:37:52,995 INFO L87 Difference]: Start difference. First operand 205 states and 215 transitions. Second operand 22 states. [2018-09-30 23:37:56,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:56,424 INFO L93 Difference]: Finished difference Result 451 states and 485 transitions. [2018-09-30 23:37:56,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-30 23:37:56,425 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 204 [2018-09-30 23:37:56,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:56,427 INFO L225 Difference]: With dead ends: 451 [2018-09-30 23:37:56,427 INFO L226 Difference]: Without dead ends: 267 [2018-09-30 23:37:56,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4851 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=437, Invalid=14083, Unknown=0, NotChecked=0, Total=14520 [2018-09-30 23:37:56,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-09-30 23:37:56,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 247. [2018-09-30 23:37:56,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-09-30 23:37:56,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 258 transitions. [2018-09-30 23:37:56,462 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 258 transitions. Word has length 204 [2018-09-30 23:37:56,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:56,463 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 258 transitions. [2018-09-30 23:37:56,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:37:56,463 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 258 transitions. [2018-09-30 23:37:56,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-09-30 23:37:56,466 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:56,466 INFO L375 BasicCegarLoop]: trace histogram [110, 99, 12, 11, 11, 1, 1, 1] [2018-09-30 23:37:56,466 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:56,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:56,467 INFO L82 PathProgramCache]: Analyzing trace with hash 915329223, now seen corresponding path program 12 times [2018-09-30 23:37:56,467 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:56,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:56,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:56,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:37:56,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:57,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12122 backedges. 0 proven. 11132 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-09-30 23:37:57,410 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:37:57,410 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:37:57,419 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:38:02,253 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-09-30 23:38:02,254 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:38:02,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:38:02,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12122 backedges. 2022 proven. 90 refuted. 0 times theorem prover too weak. 10010 trivial. 0 not checked. [2018-09-30 23:38:02,581 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:38:02,581 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2018-09-30 23:38:02,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:38:02,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:38:02,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:38:02,583 INFO L87 Difference]: Start difference. First operand 247 states and 258 transitions. Second operand 24 states. [2018-09-30 23:38:06,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:38:06,739 INFO L93 Difference]: Finished difference Result 539 states and 576 transitions. [2018-09-30 23:38:06,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-09-30 23:38:06,740 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 246 [2018-09-30 23:38:06,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:38:06,741 INFO L225 Difference]: With dead ends: 539 [2018-09-30 23:38:06,741 INFO L226 Difference]: Without dead ends: 315 [2018-09-30 23:38:06,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7140 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=525, Invalid=20067, Unknown=0, NotChecked=0, Total=20592 [2018-09-30 23:38:06,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-09-30 23:38:06,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 293. [2018-09-30 23:38:06,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-09-30 23:38:06,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 305 transitions. [2018-09-30 23:38:06,784 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 305 transitions. Word has length 246 [2018-09-30 23:38:06,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:38:06,784 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 305 transitions. [2018-09-30 23:38:06,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:38:06,784 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 305 transitions. [2018-09-30 23:38:06,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-09-30 23:38:06,786 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:38:06,786 INFO L375 BasicCegarLoop]: trace histogram [132, 120, 13, 12, 12, 1, 1, 1] [2018-09-30 23:38:06,786 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:38:06,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:38:06,787 INFO L82 PathProgramCache]: Analyzing trace with hash 154612223, now seen corresponding path program 13 times [2018-09-30 23:38:06,787 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:38:06,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:38:06,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:06,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:38:06,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:38:07,616 INFO L134 CoverageAnalysis]: Checked inductivity of 17448 backedges. 0 proven. 16128 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-09-30 23:38:07,616 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:38:07,616 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:38:07,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:38:07,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:38:07,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:38:07,893 INFO L134 CoverageAnalysis]: Checked inductivity of 17448 backedges. 0 proven. 16128 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-09-30 23:38:07,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:38:07,925 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 23:38:07,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:38:07,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:38:07,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:38:07,927 INFO L87 Difference]: Start difference. First operand 293 states and 305 transitions. Second operand 15 states. [2018-09-30 23:38:08,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:38:08,271 INFO L93 Difference]: Finished difference Result 341 states and 355 transitions. [2018-09-30 23:38:08,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 23:38:08,271 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 292 [2018-09-30 23:38:08,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:38:08,273 INFO L225 Difference]: With dead ends: 341 [2018-09-30 23:38:08,273 INFO L226 Difference]: Without dead ends: 339 [2018-09-30 23:38:08,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:38:08,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-09-30 23:38:08,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 317. [2018-09-30 23:38:08,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2018-09-30 23:38:08,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 330 transitions. [2018-09-30 23:38:08,321 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 330 transitions. Word has length 292 [2018-09-30 23:38:08,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:38:08,321 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 330 transitions. [2018-09-30 23:38:08,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:38:08,321 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 330 transitions. [2018-09-30 23:38:08,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-09-30 23:38:08,323 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:38:08,323 INFO L375 BasicCegarLoop]: trace histogram [143, 130, 14, 13, 13, 1, 1, 1] [2018-09-30 23:38:08,323 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:38:08,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:38:08,324 INFO L82 PathProgramCache]: Analyzing trace with hash -114885159, now seen corresponding path program 14 times [2018-09-30 23:38:08,324 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:38:08,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:38:08,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:08,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:38:08,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:38:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 20488 backedges. 0 proven. 19058 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-09-30 23:38:09,061 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:38:09,061 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:38:09,072 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:38:09,180 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:38:09,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:38:09,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:38:09,372 INFO L134 CoverageAnalysis]: Checked inductivity of 20488 backedges. 0 proven. 19058 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-09-30 23:38:09,394 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:38:09,394 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 23:38:09,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:38:09,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:38:09,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:38:09,395 INFO L87 Difference]: Start difference. First operand 317 states and 330 transitions. Second operand 16 states. [2018-09-30 23:38:09,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:38:09,740 INFO L93 Difference]: Finished difference Result 365 states and 380 transitions. [2018-09-30 23:38:09,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 23:38:09,740 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 316 [2018-09-30 23:38:09,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:38:09,742 INFO L225 Difference]: With dead ends: 365 [2018-09-30 23:38:09,742 INFO L226 Difference]: Without dead ends: 363 [2018-09-30 23:38:09,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 315 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:38:09,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-09-30 23:38:09,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 341. [2018-09-30 23:38:09,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-09-30 23:38:09,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 355 transitions. [2018-09-30 23:38:09,791 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 355 transitions. Word has length 316 [2018-09-30 23:38:09,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:38:09,792 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 355 transitions. [2018-09-30 23:38:09,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:38:09,792 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 355 transitions. [2018-09-30 23:38:09,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-09-30 23:38:09,794 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:38:09,794 INFO L375 BasicCegarLoop]: trace histogram [154, 140, 15, 14, 14, 1, 1, 1] [2018-09-30 23:38:09,794 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:38:09,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:38:09,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1438164045, now seen corresponding path program 15 times [2018-09-30 23:38:09,795 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:38:09,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:38:09,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:09,796 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:38:09,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:09,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:38:10,467 INFO L134 CoverageAnalysis]: Checked inductivity of 23772 backedges. 0 proven. 22232 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-09-30 23:38:10,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:38:10,467 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:38:10,476 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:47:43,784 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 75 check-sat command(s) [2018-09-30 23:47:43,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:47:44,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:44,457 INFO L134 CoverageAnalysis]: Checked inductivity of 23772 backedges. 0 proven. 22232 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-09-30 23:47:44,463 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:44,463 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 23:47:44,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:47:44,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:47:44,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:47:44,464 INFO L87 Difference]: Start difference. First operand 341 states and 355 transitions. Second operand 17 states. [2018-09-30 23:47:46,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:46,178 INFO L93 Difference]: Finished difference Result 389 states and 405 transitions. [2018-09-30 23:47:46,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:47:46,178 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 340 [2018-09-30 23:47:46,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:46,180 INFO L225 Difference]: With dead ends: 389 [2018-09-30 23:47:46,180 INFO L226 Difference]: Without dead ends: 387 [2018-09-30 23:47:46,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 339 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:47:46,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2018-09-30 23:47:46,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 365. [2018-09-30 23:47:46,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2018-09-30 23:47:46,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 380 transitions. [2018-09-30 23:47:46,235 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 380 transitions. Word has length 340 [2018-09-30 23:47:46,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:46,236 INFO L480 AbstractCegarLoop]: Abstraction has 365 states and 380 transitions. [2018-09-30 23:47:46,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:47:46,236 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 380 transitions. [2018-09-30 23:47:46,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2018-09-30 23:47:46,238 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:46,239 INFO L375 BasicCegarLoop]: trace histogram [165, 150, 16, 15, 15, 1, 1, 1] [2018-09-30 23:47:46,239 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:46,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:46,239 INFO L82 PathProgramCache]: Analyzing trace with hash 411192205, now seen corresponding path program 16 times [2018-09-30 23:47:46,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:46,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:46,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:46,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:47:46,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:46,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 27300 backedges. 0 proven. 25650 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-09-30 23:47:47,215 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:47,215 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:47:47,222 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:47:47,342 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:47:47,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:47:47,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:47,570 INFO L134 CoverageAnalysis]: Checked inductivity of 27300 backedges. 0 proven. 25650 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-09-30 23:47:47,591 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:47,591 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 23:47:47,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:47:47,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:47:47,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:47:47,592 INFO L87 Difference]: Start difference. First operand 365 states and 380 transitions. Second operand 18 states. [2018-09-30 23:47:48,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:48,049 INFO L93 Difference]: Finished difference Result 413 states and 430 transitions. [2018-09-30 23:47:48,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:47:48,049 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 364 [2018-09-30 23:47:48,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:48,051 INFO L225 Difference]: With dead ends: 413 [2018-09-30 23:47:48,052 INFO L226 Difference]: Without dead ends: 411 [2018-09-30 23:47:48,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 363 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:47:48,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2018-09-30 23:47:48,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 389. [2018-09-30 23:47:48,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2018-09-30 23:47:48,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 405 transitions. [2018-09-30 23:47:48,129 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 405 transitions. Word has length 364 [2018-09-30 23:47:48,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:48,130 INFO L480 AbstractCegarLoop]: Abstraction has 389 states and 405 transitions. [2018-09-30 23:47:48,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:47:48,130 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 405 transitions. [2018-09-30 23:47:48,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2018-09-30 23:47:48,132 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:48,133 INFO L375 BasicCegarLoop]: trace histogram [176, 160, 17, 16, 16, 1, 1, 1] [2018-09-30 23:47:48,133 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:48,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:48,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1581134489, now seen corresponding path program 17 times [2018-09-30 23:47:48,134 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:48,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:48,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:48,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:47:48,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:48,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 31072 backedges. 0 proven. 29312 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2018-09-30 23:47:49,388 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:49,388 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:47:49,396 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown