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/down.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 23:32:25,282 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 23:32:25,284 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 23:32:25,304 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 23:32:25,305 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 23:32:25,306 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 23:32:25,309 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 23:32:25,312 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 23:32:25,315 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 23:32:25,318 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 23:32:25,319 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 23:32:25,357 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 23:32:25,377 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 23:32:25,378 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 23:32:25,379 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 23:32:25,379 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 23:32:25,380 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 23:32:25,380 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 23:32:25,381 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 23:32:25,382 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 23:32:25,382 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 23:32:25,382 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 23:32:25,382 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 23:32:25,382 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 23:32:25,383 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 23:32:25,383 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 23:32:25,383 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 23:32:25,383 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 23:32:25,384 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 23:32:25,384 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 23:32:25,384 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 23:32:25,385 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 23:32:25,385 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 23:32:25,385 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 23:32:25,385 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:32:25,386 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 23:32:25,386 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 23:32:25,386 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 23:32:25,386 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 23:32:25,387 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 23:32:25,387 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 23:32:25,387 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 23:32:25,454 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 23:32:25,470 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 23:32:25,477 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 23:32:25,479 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 23:32:25,480 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 23:32:25,481 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/down.i_4.bpl [2018-09-30 23:32:25,482 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/down.i_4.bpl' [2018-09-30 23:32:25,545 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 23:32:25,549 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 23:32:25,550 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 23:32:25,550 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 23:32:25,551 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 23:32:25,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:32:25" (1/1) ... [2018-09-30 23:32:25,586 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:32:25" (1/1) ... [2018-09-30 23:32:25,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 23:32:25,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 23:32:25,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 23:32:25,594 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 23:32:25,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:32:25" (1/1) ... [2018-09-30 23:32:25,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:32:25" (1/1) ... [2018-09-30 23:32:25,607 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:32:25" (1/1) ... [2018-09-30 23:32:25,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:32:25" (1/1) ... [2018-09-30 23:32:25,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:32:25" (1/1) ... [2018-09-30 23:32:25,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:32:25" (1/1) ... [2018-09-30 23:32:25,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:32:25" (1/1) ... [2018-09-30 23:32:25,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 23:32:25,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 23:32:25,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 23:32:25,619 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 23:32:25,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:32:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:32:25,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 23:32:25,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 23:32:25,895 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 23:32:25,896 INFO L202 PluginConnector]: Adding new model down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:32:25 BoogieIcfgContainer [2018-09-30 23:32:25,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 23:32:25,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 23:32:25,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 23:32:25,900 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 23:32:25,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:32:25" (1/2) ... [2018-09-30 23:32:25,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147b336d and model type down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:32:25, skipping insertion in model container [2018-09-30 23:32:25,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:32:25" (2/2) ... [2018-09-30 23:32:25,904 INFO L112 eAbstractionObserver]: Analyzing ICFG down.i_4.bpl [2018-09-30 23:32:25,914 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 23:32:25,922 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 23:32:25,973 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 23:32:25,974 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 23:32:25,974 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 23:32:25,974 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 23:32:25,975 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 23:32:25,975 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 23:32:25,975 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 23:32:25,975 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 23:32:25,975 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 23:32:25,991 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-09-30 23:32:25,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 23:32:25,998 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:25,999 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-30 23:32:26,000 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:26,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:26,007 INFO L82 PathProgramCache]: Analyzing trace with hash 889539593, now seen corresponding path program 1 times [2018-09-30 23:32:26,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:26,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:26,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:26,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:32:26,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:26,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:26,221 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 23:32:26,223 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:32:26,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 23:32:26,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 23:32:26,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 23:32:26,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:32:26,247 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2018-09-30 23:32:26,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:26,479 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2018-09-30 23:32:26,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 23:32:26,481 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-30 23:32:26,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:26,490 INFO L225 Difference]: With dead ends: 16 [2018-09-30 23:32:26,491 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 23:32:26,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:32:26,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 23:32:26,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 23:32:26,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 23:32:26,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-30 23:32:26,530 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-09-30 23:32:26,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:26,531 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-30 23:32:26,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 23:32:26,531 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-30 23:32:26,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:32:26,532 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:26,532 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-30 23:32:26,532 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:26,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:26,533 INFO L82 PathProgramCache]: Analyzing trace with hash 198622019, now seen corresponding path program 1 times [2018-09-30 23:32:26,533 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:26,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:26,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:26,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:32:26,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:26,622 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 23:32:26,623 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:32:26,623 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-30 23:32:26,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 23:32:26,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 23:32:26,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:32:26,626 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-09-30 23:32:26,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:26,735 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-09-30 23:32:26,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:32:26,735 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-30 23:32:26,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:26,736 INFO L225 Difference]: With dead ends: 17 [2018-09-30 23:32:26,736 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 23:32:26,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:32:26,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 23:32:26,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 11. [2018-09-30 23:32:26,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 23:32:26,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-30 23:32:26,742 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-09-30 23:32:26,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:26,743 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-30 23:32:26,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 23:32:26,743 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-30 23:32:26,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:32:26,744 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:26,744 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 23:32:26,744 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:26,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:26,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1897132479, now seen corresponding path program 1 times [2018-09-30 23:32:26,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:26,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:26,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:26,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:32:26,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:26,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:26,863 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 23:32:26,863 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:26,863 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 23:32:26,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:32:26,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:26,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:26,954 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 23:32:26,979 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:26,979 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 23:32:26,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:32:26,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:32:26,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:32:26,981 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2018-09-30 23:32:27,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:27,179 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-09-30 23:32:27,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:32:27,180 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-30 23:32:27,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:27,181 INFO L225 Difference]: With dead ends: 20 [2018-09-30 23:32:27,181 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 23:32:27,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:32:27,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 23:32:27,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 23:32:27,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 23:32:27,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-09-30 23:32:27,187 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-09-30 23:32:27,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:27,187 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-09-30 23:32:27,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:32:27,187 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-09-30 23:32:27,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 23:32:27,188 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:27,188 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2018-09-30 23:32:27,189 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:27,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:27,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1765329927, now seen corresponding path program 2 times [2018-09-30 23:32:27,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:27,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:27,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:27,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:32:27,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:27,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:27,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:27,469 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:27,470 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 23:32:27,485 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:32:27,518 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:32:27,518 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:27,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:27,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:27,609 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:27,610 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2018-09-30 23:32:27,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:32:27,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:32:27,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:32:27,611 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-09-30 23:32:27,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:27,865 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-09-30 23:32:27,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:32:27,866 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2018-09-30 23:32:27,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:27,867 INFO L225 Difference]: With dead ends: 21 [2018-09-30 23:32:27,868 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 23:32:27,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:32:27,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 23:32:27,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-09-30 23:32:27,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 23:32:27,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-09-30 23:32:27,875 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2018-09-30 23:32:27,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:27,875 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-09-30 23:32:27,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:32:27,875 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-09-30 23:32:27,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:32:27,876 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:27,876 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-09-30 23:32:27,877 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:27,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:27,877 INFO L82 PathProgramCache]: Analyzing trace with hash 29955317, now seen corresponding path program 3 times [2018-09-30 23:32:27,877 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:27,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:27,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:27,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:27,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:27,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:27,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:27,998 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:27,999 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:28,008 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:32:28,040 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 23:32:28,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:28,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:28,088 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:28,088 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:32:28,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:32:28,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:32:28,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:32:28,089 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-09-30 23:32:28,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:28,385 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-09-30 23:32:28,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:32:28,389 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-30 23:32:28,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:28,390 INFO L225 Difference]: With dead ends: 26 [2018-09-30 23:32:28,390 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 23:32:28,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:32:28,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 23:32:28,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 23:32:28,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 23:32:28,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-09-30 23:32:28,401 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2018-09-30 23:32:28,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:28,401 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-09-30 23:32:28,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:32:28,403 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-09-30 23:32:28,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 23:32:28,404 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:28,404 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1] [2018-09-30 23:32:28,404 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:28,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:28,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1153652177, now seen corresponding path program 4 times [2018-09-30 23:32:28,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:28,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:28,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:28,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:28,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:28,679 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:28,679 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:28,679 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 23:32:28,688 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:32:28,702 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:32:28,702 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:28,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:28,739 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:28,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:28,761 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-09-30 23:32:28,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:32:28,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:32:28,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:32:28,762 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-09-30 23:32:28,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:28,912 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-09-30 23:32:28,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:32:28,914 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-30 23:32:28,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:28,915 INFO L225 Difference]: With dead ends: 25 [2018-09-30 23:32:28,915 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 23:32:28,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:32:28,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 23:32:28,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-09-30 23:32:28,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 23:32:28,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-09-30 23:32:28,922 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2018-09-30 23:32:28,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:28,922 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-09-30 23:32:28,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:32:28,922 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-09-30 23:32:28,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:32:28,923 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:28,923 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-09-30 23:32:28,924 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:28,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:28,924 INFO L82 PathProgramCache]: Analyzing trace with hash -558246485, now seen corresponding path program 5 times [2018-09-30 23:32:28,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:28,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:28,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:28,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:28,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:28,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:29,092 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:29,092 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:29,092 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 23:32:29,100 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:32:29,123 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 23:32:29,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:29,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:29,135 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:29,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:29,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:32:29,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:32:29,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:32:29,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:32:29,159 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2018-09-30 23:32:29,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:29,366 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-09-30 23:32:29,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:32:29,367 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-30 23:32:29,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:29,368 INFO L225 Difference]: With dead ends: 32 [2018-09-30 23:32:29,368 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 23:32:29,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:32:29,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 23:32:29,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 23:32:29,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 23:32:29,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-09-30 23:32:29,373 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-09-30 23:32:29,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:29,374 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-09-30 23:32:29,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:32:29,374 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-09-30 23:32:29,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 23:32:29,375 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:29,375 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1] [2018-09-30 23:32:29,375 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:29,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:29,376 INFO L82 PathProgramCache]: Analyzing trace with hash -578011675, now seen corresponding path program 6 times [2018-09-30 23:32:29,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:29,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:29,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:29,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:29,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:29,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:29,532 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:29,532 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:29,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:32:29,550 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:32:29,633 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-30 23:32:29,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:29,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:29,780 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:29,800 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:29,800 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-09-30 23:32:29,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:32:29,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:32:29,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:32:29,801 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-09-30 23:32:29,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:29,981 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-09-30 23:32:29,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:32:29,982 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-09-30 23:32:29,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:29,983 INFO L225 Difference]: With dead ends: 29 [2018-09-30 23:32:29,983 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 23:32:29,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:32:29,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 23:32:29,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2018-09-30 23:32:29,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 23:32:29,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-09-30 23:32:29,991 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2018-09-30 23:32:29,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:29,991 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-09-30 23:32:29,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:32:29,992 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-09-30 23:32:29,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 23:32:29,992 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:29,993 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2018-09-30 23:32:29,993 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:29,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:29,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1418505247, now seen corresponding path program 7 times [2018-09-30 23:32:29,993 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:29,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:29,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:29,995 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:29,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:30,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:30,128 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:30,128 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 23:32:30,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:32:30,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:30,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:30,167 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:30,190 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:30,191 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 23:32:30,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:32:30,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:32:30,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:32:30,192 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2018-09-30 23:32:30,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:30,360 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-09-30 23:32:30,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 23:32:30,360 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-30 23:32:30,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:30,361 INFO L225 Difference]: With dead ends: 38 [2018-09-30 23:32:30,361 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 23:32:30,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:32:30,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 23:32:30,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 23:32:30,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 23:32:30,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-09-30 23:32:30,368 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2018-09-30 23:32:30,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:30,369 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-09-30 23:32:30,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:32:30,369 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-09-30 23:32:30,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 23:32:30,370 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:30,370 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1] [2018-09-30 23:32:30,370 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:30,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:30,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1375531237, now seen corresponding path program 8 times [2018-09-30 23:32:30,371 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:30,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:30,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:30,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:32:30,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:30,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:30,523 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:30,523 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:30,523 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:32:30,535 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:32:30,554 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:32:30,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:30,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:30,617 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:30,619 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-09-30 23:32:30,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:32:30,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:32:30,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:32:30,620 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2018-09-30 23:32:30,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:30,904 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-09-30 23:32:30,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 23:32:30,907 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2018-09-30 23:32:30,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:30,908 INFO L225 Difference]: With dead ends: 33 [2018-09-30 23:32:30,908 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:32:30,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:32:30,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:32:30,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2018-09-30 23:32:30,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 23:32:30,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-09-30 23:32:30,923 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-09-30 23:32:30,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:30,924 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-09-30 23:32:30,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:32:30,924 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-09-30 23:32:30,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 23:32:30,925 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:30,925 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-09-30 23:32:30,925 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:30,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:30,926 INFO L82 PathProgramCache]: Analyzing trace with hash 964341655, now seen corresponding path program 9 times [2018-09-30 23:32:30,926 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:30,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:30,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:30,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:30,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:31,263 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:31,264 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:31,264 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 23:32:31,273 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:32:31,324 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 23:32:31,325 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:31,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:31,373 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:31,373 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 23:32:31,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:32:31,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:32:31,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:32:31,374 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2018-09-30 23:32:31,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:31,598 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-09-30 23:32:31,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 23:32:31,599 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-30 23:32:31,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:31,599 INFO L225 Difference]: With dead ends: 44 [2018-09-30 23:32:31,599 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 23:32:31,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:32:31,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 23:32:31,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 23:32:31,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 23:32:31,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-09-30 23:32:31,607 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-09-30 23:32:31,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:31,607 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-09-30 23:32:31,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:32:31,607 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-09-30 23:32:31,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 23:32:31,608 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:31,608 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1] [2018-09-30 23:32:31,608 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:31,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:31,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1427751471, now seen corresponding path program 10 times [2018-09-30 23:32:31,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:31,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:31,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:31,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:31,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:32,273 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:32,273 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:32,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:32:32,281 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:32:32,300 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:32:32,300 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:32,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:32,327 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:32,357 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:32,357 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-09-30 23:32:32,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:32:32,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:32:32,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:32:32,358 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2018-09-30 23:32:32,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:32,574 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-09-30 23:32:32,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:32:32,575 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-09-30 23:32:32,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:32,576 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:32:32,576 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:32:32,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:32:32,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:32:32,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2018-09-30 23:32:32,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 23:32:32,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-09-30 23:32:32,585 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2018-09-30 23:32:32,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:32,585 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-09-30 23:32:32,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:32:32,585 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-09-30 23:32:32,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 23:32:32,586 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:32,586 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2018-09-30 23:32:32,587 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:32,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:32,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1974662963, now seen corresponding path program 11 times [2018-09-30 23:32:32,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:32,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:32,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:32,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:32,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:32,887 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:32,887 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 23:32:32,895 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:32:32,940 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 23:32:32,941 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:32,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:32,965 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:32,993 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:32,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 23:32:32,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:32:32,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:32:32,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:32:32,994 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2018-09-30 23:32:33,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:33,745 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-09-30 23:32:33,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 23:32:33,745 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-30 23:32:33,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:33,747 INFO L225 Difference]: With dead ends: 50 [2018-09-30 23:32:33,747 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 23:32:33,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:32:33,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 23:32:33,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 23:32:33,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 23:32:33,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-09-30 23:32:33,755 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2018-09-30 23:32:33,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:33,756 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-09-30 23:32:33,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:32:33,756 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-09-30 23:32:33,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 23:32:33,757 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:33,757 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1] [2018-09-30 23:32:33,757 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:33,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:33,757 INFO L82 PathProgramCache]: Analyzing trace with hash 577956359, now seen corresponding path program 12 times [2018-09-30 23:32:33,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:33,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:33,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:33,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:33,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:33,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:34,078 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:34,079 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:34,079 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:32:34,087 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:32:34,190 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 23:32:34,191 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:34,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:34,272 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:34,273 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-09-30 23:32:34,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:32:34,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:32:34,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:32:34,274 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2018-09-30 23:32:34,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:34,533 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-09-30 23:32:34,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 23:32:34,534 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2018-09-30 23:32:34,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:34,535 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:32:34,535 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:32:34,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:32:34,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:32:34,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-09-30 23:32:34,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 23:32:34,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-09-30 23:32:34,541 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-09-30 23:32:34,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:34,541 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-09-30 23:32:34,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:32:34,542 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-09-30 23:32:34,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 23:32:34,542 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:34,542 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-09-30 23:32:34,542 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:34,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:34,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1365213059, now seen corresponding path program 13 times [2018-09-30 23:32:34,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:34,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:34,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:34,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:34,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:34,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:34,735 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:34,735 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:34,735 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 23:32:34,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:32:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:34,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:34,776 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:34,807 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:34,807 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 23:32:34,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:32:34,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:32:34,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:32:34,808 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 18 states. [2018-09-30 23:32:35,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:35,649 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-09-30 23:32:35,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:32:35,649 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-30 23:32:35,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:35,650 INFO L225 Difference]: With dead ends: 56 [2018-09-30 23:32:35,651 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:32:35,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:32:35,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:32:35,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 23:32:35,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 23:32:35,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-09-30 23:32:35,659 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-09-30 23:32:35,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:35,659 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-09-30 23:32:35,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:32:35,659 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-09-30 23:32:35,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 23:32:35,660 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:35,660 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1] [2018-09-30 23:32:35,660 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:35,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:35,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1260506179, now seen corresponding path program 14 times [2018-09-30 23:32:35,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:35,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:35,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:35,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:32:35,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:35,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:35,845 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:35,846 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:35,846 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 23:32:35,855 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:32:35,889 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:32:35,890 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:35,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:35,923 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:35,945 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:35,946 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-09-30 23:32:35,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:32:35,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:32:35,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:32:35,947 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-09-30 23:32:36,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:36,159 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-09-30 23:32:36,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 23:32:36,160 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-09-30 23:32:36,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:36,161 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:32:36,161 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:32:36,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=317, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:32:36,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:32:36,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-09-30 23:32:36,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 23:32:36,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-09-30 23:32:36,171 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2018-09-30 23:32:36,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:36,172 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-09-30 23:32:36,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:32:36,172 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-09-30 23:32:36,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 23:32:36,173 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:36,173 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2018-09-30 23:32:36,173 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:36,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:36,173 INFO L82 PathProgramCache]: Analyzing trace with hash -165727303, now seen corresponding path program 15 times [2018-09-30 23:32:36,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:36,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:36,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:36,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:36,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:36,551 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:36,551 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:32:36,561 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:32:36,596 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 23:32:36,596 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:36,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:36,644 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:36,644 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 23:32:36,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:32:36,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:32:36,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:32:36,645 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 20 states. [2018-09-30 23:32:36,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:36,975 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-09-30 23:32:36,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 23:32:36,976 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-30 23:32:36,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:36,977 INFO L225 Difference]: With dead ends: 62 [2018-09-30 23:32:36,977 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:32:36,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:32:36,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:32:36,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 23:32:36,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 23:32:36,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-09-30 23:32:36,985 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2018-09-30 23:32:36,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:36,985 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-09-30 23:32:36,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:32:36,985 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-09-30 23:32:36,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 23:32:36,986 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:36,986 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1] [2018-09-30 23:32:36,986 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:36,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:36,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1448426227, now seen corresponding path program 16 times [2018-09-30 23:32:36,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:36,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:36,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:36,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:36,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:37,157 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:37,157 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:37,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:32:37,164 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:32:37,189 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:32:37,189 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:37,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:37,229 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:37,251 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:37,251 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-09-30 23:32:37,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:32:37,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:32:37,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:32:37,252 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2018-09-30 23:32:37,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:37,430 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-09-30 23:32:37,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:32:37,430 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-09-30 23:32:37,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:37,431 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:32:37,431 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:32:37,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:32:37,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:32:37,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2018-09-30 23:32:37,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 23:32:37,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-09-30 23:32:37,441 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-09-30 23:32:37,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:37,442 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-09-30 23:32:37,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:32:37,442 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-09-30 23:32:37,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 23:32:37,443 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:37,443 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-09-30 23:32:37,443 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:37,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:37,444 INFO L82 PathProgramCache]: Analyzing trace with hash 368133487, now seen corresponding path program 17 times [2018-09-30 23:32:37,444 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:37,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:37,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:37,445 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:37,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:37,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:37,701 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:37,701 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:32:37,711 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:32:37,744 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 23:32:37,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:37,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:37,757 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:37,784 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:37,784 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 23:32:37,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:32:37,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:32:37,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:32:37,786 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 22 states. [2018-09-30 23:32:38,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:38,874 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-09-30 23:32:38,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 23:32:38,875 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-30 23:32:38,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:38,876 INFO L225 Difference]: With dead ends: 68 [2018-09-30 23:32:38,876 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:32:38,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=261, Invalid=731, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:32:38,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:32:38,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 23:32:38,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 23:32:38,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-09-30 23:32:38,887 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-09-30 23:32:38,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:38,887 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-09-30 23:32:38,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:32:38,887 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-09-30 23:32:38,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 23:32:38,888 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:38,888 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1] [2018-09-30 23:32:38,888 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:38,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:38,889 INFO L82 PathProgramCache]: Analyzing trace with hash -788717655, now seen corresponding path program 18 times [2018-09-30 23:32:38,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:38,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:38,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:38,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:38,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:38,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:39,174 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:39,175 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:39,175 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:39,185 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:32:39,241 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-09-30 23:32:39,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:39,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:39,424 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:39,424 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-09-30 23:32:39,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:32:39,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:32:39,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:32:39,425 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2018-09-30 23:32:39,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:39,800 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-09-30 23:32:39,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 23:32:39,801 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-09-30 23:32:39,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:39,801 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:32:39,801 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:32:39,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=440, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:32:39,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:32:39,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2018-09-30 23:32:39,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 23:32:39,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-09-30 23:32:39,811 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2018-09-30 23:32:39,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:39,812 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-09-30 23:32:39,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:32:39,812 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-09-30 23:32:39,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 23:32:39,812 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:39,812 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2018-09-30 23:32:39,813 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:39,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:39,813 INFO L82 PathProgramCache]: Analyzing trace with hash -2043489115, now seen corresponding path program 19 times [2018-09-30 23:32:39,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:39,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:39,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:39,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:39,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:41,017 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:41,018 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:41,018 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:41,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:32:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:41,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:41,097 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:41,097 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 23:32:41,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:32:41,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:32:41,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:32:41,099 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 24 states. [2018-09-30 23:32:41,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:41,599 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-09-30 23:32:41,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:32:41,600 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-30 23:32:41,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:41,600 INFO L225 Difference]: With dead ends: 74 [2018-09-30 23:32:41,600 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:32:41,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=309, Invalid=881, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:32:41,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:32:41,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 23:32:41,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 23:32:41,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-09-30 23:32:41,608 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2018-09-30 23:32:41,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:41,608 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-09-30 23:32:41,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:32:41,608 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-09-30 23:32:41,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 23:32:41,609 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:41,609 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1] [2018-09-30 23:32:41,609 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:41,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:41,610 INFO L82 PathProgramCache]: Analyzing trace with hash -957152801, now seen corresponding path program 20 times [2018-09-30 23:32:41,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:41,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:41,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:41,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:32:41,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:41,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:42,831 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:42,832 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:42,832 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:42,840 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:32:42,870 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:32:42,870 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:42,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:42,916 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:42,937 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:42,937 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-09-30 23:32:42,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:32:42,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:32:42,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:32:42,938 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 17 states. [2018-09-30 23:32:43,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:43,181 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-09-30 23:32:43,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:32:43,184 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2018-09-30 23:32:43,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:43,184 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:32:43,185 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:32:43,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=303, Invalid=509, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:32:43,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:32:43,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2018-09-30 23:32:43,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 23:32:43,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-09-30 23:32:43,194 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-09-30 23:32:43,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:43,194 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-09-30 23:32:43,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:32:43,194 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-09-30 23:32:43,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 23:32:43,195 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:43,195 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-09-30 23:32:43,195 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:43,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:43,196 INFO L82 PathProgramCache]: Analyzing trace with hash -700907173, now seen corresponding path program 21 times [2018-09-30 23:32:43,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:43,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:43,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:43,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:43,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:43,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:43,528 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:43,528 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:43,528 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:43,545 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:32:43,581 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 23:32:43,581 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:43,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:43,593 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:43,613 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:43,614 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 23:32:43,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 23:32:43,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 23:32:43,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:32:43,615 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 26 states. [2018-09-30 23:32:44,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:44,050 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-09-30 23:32:44,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 23:32:44,050 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-30 23:32:44,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:44,051 INFO L225 Difference]: With dead ends: 80 [2018-09-30 23:32:44,051 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:32:44,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=361, Invalid=1045, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:32:44,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:32:44,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 23:32:44,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 23:32:44,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-09-30 23:32:44,059 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-09-30 23:32:44,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:44,059 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-09-30 23:32:44,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 23:32:44,059 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-09-30 23:32:44,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 23:32:44,060 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:44,060 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1] [2018-09-30 23:32:44,060 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:44,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:44,060 INFO L82 PathProgramCache]: Analyzing trace with hash 877396373, now seen corresponding path program 22 times [2018-09-30 23:32:44,060 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:44,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:44,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:44,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:44,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:44,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:44,269 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:44,269 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:44,270 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:44,277 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:32:44,312 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:32:44,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:44,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:44,374 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:44,395 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:44,395 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-09-30 23:32:44,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:32:44,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:32:44,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:32:44,396 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2018-09-30 23:32:44,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:44,881 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-09-30 23:32:44,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 23:32:44,881 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-09-30 23:32:44,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:44,882 INFO L225 Difference]: With dead ends: 61 [2018-09-30 23:32:44,882 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 23:32:44,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=347, Invalid=583, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:32:44,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 23:32:44,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-09-30 23:32:44,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 23:32:44,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-09-30 23:32:44,893 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2018-09-30 23:32:44,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:44,894 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-09-30 23:32:44,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:32:44,894 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-09-30 23:32:44,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 23:32:44,894 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:44,894 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2018-09-30 23:32:44,895 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:44,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:44,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1364257681, now seen corresponding path program 23 times [2018-09-30 23:32:44,895 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:44,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:44,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:44,896 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:44,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:44,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:45,358 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:45,358 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:45,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:45,369 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:32:45,407 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 23:32:45,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:45,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:45,421 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:45,452 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:45,452 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 23:32:45,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 23:32:45,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 23:32:45,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:32:45,453 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 28 states. [2018-09-30 23:32:46,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:46,105 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-09-30 23:32:46,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 23:32:46,105 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-30 23:32:46,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:46,106 INFO L225 Difference]: With dead ends: 86 [2018-09-30 23:32:46,106 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 23:32:46,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=417, Invalid=1223, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:32:46,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 23:32:46,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 23:32:46,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 23:32:46,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-09-30 23:32:46,116 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2018-09-30 23:32:46,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:46,116 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-09-30 23:32:46,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 23:32:46,116 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-09-30 23:32:46,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 23:32:46,117 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:46,117 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1] [2018-09-30 23:32:46,117 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:46,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:46,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1897217739, now seen corresponding path program 24 times [2018-09-30 23:32:46,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:46,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:46,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:46,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:46,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:46,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:46,359 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:46,359 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:46,360 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:46,367 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:32:46,413 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-30 23:32:46,414 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:46,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:46,476 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:46,477 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-09-30 23:32:46,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 23:32:46,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 23:32:46,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:32:46,478 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-09-30 23:32:47,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:47,017 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-09-30 23:32:47,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 23:32:47,019 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2018-09-30 23:32:47,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:47,020 INFO L225 Difference]: With dead ends: 65 [2018-09-30 23:32:47,020 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 23:32:47,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=394, Invalid=662, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:32:47,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 23:32:47,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-09-30 23:32:47,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 23:32:47,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-09-30 23:32:47,028 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-09-30 23:32:47,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:47,029 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-09-30 23:32:47,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 23:32:47,029 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-09-30 23:32:47,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 23:32:47,029 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:47,030 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-09-30 23:32:47,030 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:47,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:47,030 INFO L82 PathProgramCache]: Analyzing trace with hash -2134920377, now seen corresponding path program 25 times [2018-09-30 23:32:47,030 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:47,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:47,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:47,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:47,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:47,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:47,529 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:47,530 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:47,530 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:47,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:32:47,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:47,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:47,583 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:47,604 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:47,605 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 23:32:47,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 23:32:47,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 23:32:47,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:32:47,606 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 30 states. [2018-09-30 23:32:48,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:48,402 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-09-30 23:32:48,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 23:32:48,402 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-30 23:32:48,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:48,402 INFO L225 Difference]: With dead ends: 92 [2018-09-30 23:32:48,403 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 23:32:48,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=477, Invalid=1415, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:32:48,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 23:32:48,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 23:32:48,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 23:32:48,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-09-30 23:32:48,412 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2018-09-30 23:32:48,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:48,412 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-09-30 23:32:48,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 23:32:48,412 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-09-30 23:32:48,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 23:32:48,413 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:48,413 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1] [2018-09-30 23:32:48,414 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:48,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:48,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1286350463, now seen corresponding path program 26 times [2018-09-30 23:32:48,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:48,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:48,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:48,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:32:48,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:48,847 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:48,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:48,847 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:48,856 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:32:48,893 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:32:48,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:48,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:48,925 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:48,945 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:48,946 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-09-30 23:32:48,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:32:48,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:32:48,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:32:48,947 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2018-09-30 23:32:49,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:49,208 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-09-30 23:32:49,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 23:32:49,209 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-09-30 23:32:49,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:49,210 INFO L225 Difference]: With dead ends: 69 [2018-09-30 23:32:49,210 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 23:32:49,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=444, Invalid=746, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:32:49,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 23:32:49,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2018-09-30 23:32:49,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 23:32:49,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-09-30 23:32:49,219 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2018-09-30 23:32:49,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:49,219 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-09-30 23:32:49,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:32:49,219 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-09-30 23:32:49,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 23:32:49,220 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:49,220 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2018-09-30 23:32:49,220 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:49,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:49,220 INFO L82 PathProgramCache]: Analyzing trace with hash 767719549, now seen corresponding path program 27 times [2018-09-30 23:32:49,221 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:49,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:49,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:49,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:49,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:49,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:49,918 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:49,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:49,925 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:32:49,966 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 23:32:49,966 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:49,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:49,980 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:50,000 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:50,000 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 23:32:50,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 23:32:50,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 23:32:50,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:32:50,001 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 32 states. [2018-09-30 23:32:50,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:50,537 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-09-30 23:32:50,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 23:32:50,537 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-30 23:32:50,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:50,538 INFO L225 Difference]: With dead ends: 98 [2018-09-30 23:32:50,538 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 23:32:50,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=541, Invalid=1621, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:32:50,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 23:32:50,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 23:32:50,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 23:32:50,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-09-30 23:32:50,549 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2018-09-30 23:32:50,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:50,549 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-09-30 23:32:50,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 23:32:50,550 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-09-30 23:32:50,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 23:32:50,550 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:50,550 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1] [2018-09-30 23:32:50,550 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:50,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:50,551 INFO L82 PathProgramCache]: Analyzing trace with hash 285536695, now seen corresponding path program 28 times [2018-09-30 23:32:50,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:50,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:50,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:50,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:50,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:50,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:51,293 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:51,293 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:51,302 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:32:51,340 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:32:51,340 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:51,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:51,393 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:51,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:51,414 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2018-09-30 23:32:51,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 23:32:51,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 23:32:51,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:32:51,415 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 21 states. [2018-09-30 23:32:51,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:51,693 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-09-30 23:32:51,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 23:32:51,693 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2018-09-30 23:32:51,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:51,694 INFO L225 Difference]: With dead ends: 73 [2018-09-30 23:32:51,694 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 23:32:51,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=497, Invalid=835, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:32:51,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 23:32:51,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2018-09-30 23:32:51,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 23:32:51,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-09-30 23:32:51,705 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2018-09-30 23:32:51,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:51,705 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-09-30 23:32:51,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 23:32:51,705 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-09-30 23:32:51,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 23:32:51,705 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:51,705 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-09-30 23:32:51,706 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:51,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:51,706 INFO L82 PathProgramCache]: Analyzing trace with hash -477209805, now seen corresponding path program 29 times [2018-09-30 23:32:51,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:51,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:51,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:51,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:51,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:52,134 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:52,134 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:52,142 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:32:52,378 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 23:32:52,378 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:52,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:52,396 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:52,417 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:52,417 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 23:32:52,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 23:32:52,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 23:32:52,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:32:52,418 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 34 states. [2018-09-30 23:32:53,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:53,310 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-09-30 23:32:53,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 23:32:53,311 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-30 23:32:53,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:53,311 INFO L225 Difference]: With dead ends: 104 [2018-09-30 23:32:53,312 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 23:32:53,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=609, Invalid=1841, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:32:53,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 23:32:53,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 23:32:53,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 23:32:53,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-09-30 23:32:53,326 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-09-30 23:32:53,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:53,326 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-09-30 23:32:53,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 23:32:53,326 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-09-30 23:32:53,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 23:32:53,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:53,327 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1] [2018-09-30 23:32:53,327 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:53,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:53,328 INFO L82 PathProgramCache]: Analyzing trace with hash 35497837, now seen corresponding path program 30 times [2018-09-30 23:32:53,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:53,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:53,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:53,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:53,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:53,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:54,412 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:54,412 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:54,420 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:32:54,472 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-09-30 23:32:54,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:54,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:54,565 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:54,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-09-30 23:32:54,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:32:54,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:32:54,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:32:54,566 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2018-09-30 23:32:55,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:55,048 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-09-30 23:32:55,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 23:32:55,048 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2018-09-30 23:32:55,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:55,049 INFO L225 Difference]: With dead ends: 77 [2018-09-30 23:32:55,049 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 23:32:55,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=553, Invalid=929, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:32:55,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 23:32:55,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2018-09-30 23:32:55,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 23:32:55,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-09-30 23:32:55,059 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2018-09-30 23:32:55,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:55,059 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-09-30 23:32:55,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:32:55,060 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-09-30 23:32:55,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 23:32:55,060 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:55,060 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2018-09-30 23:32:55,060 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:55,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:55,061 INFO L82 PathProgramCache]: Analyzing trace with hash -246383767, now seen corresponding path program 31 times [2018-09-30 23:32:55,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:55,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:55,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:55,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:55,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:56,095 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:56,096 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:56,096 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:56,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:32:56,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:56,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:56,164 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:56,185 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:56,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 23:32:56,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 23:32:56,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 23:32:56,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:32:56,186 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 36 states. [2018-09-30 23:32:56,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:56,999 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-09-30 23:32:56,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 23:32:56,999 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-30 23:32:56,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:57,000 INFO L225 Difference]: With dead ends: 110 [2018-09-30 23:32:57,000 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 23:32:57,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=681, Invalid=2075, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:32:57,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 23:32:57,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 23:32:57,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 23:32:57,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-09-30 23:32:57,011 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2018-09-30 23:32:57,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:57,012 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-09-30 23:32:57,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 23:32:57,012 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-09-30 23:32:57,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 23:32:57,012 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:57,012 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1] [2018-09-30 23:32:57,012 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:57,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:57,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1653283491, now seen corresponding path program 32 times [2018-09-30 23:32:57,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:57,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:57,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:57,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:32:57,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:57,617 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:57,617 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:57,617 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:57,624 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:32:57,684 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:32:57,685 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:57,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:57,903 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:57,904 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2018-09-30 23:32:57,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 23:32:57,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 23:32:57,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:32:57,905 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 23 states. [2018-09-30 23:32:58,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:58,223 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-09-30 23:32:58,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 23:32:58,224 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2018-09-30 23:32:58,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:58,225 INFO L225 Difference]: With dead ends: 81 [2018-09-30 23:32:58,225 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 23:32:58,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=612, Invalid=1028, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:32:58,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 23:32:58,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2018-09-30 23:32:58,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 23:32:58,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-09-30 23:32:58,237 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-09-30 23:32:58,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:58,237 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-09-30 23:32:58,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 23:32:58,237 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-09-30 23:32:58,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 23:32:58,237 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:58,237 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-09-30 23:32:58,238 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:58,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:58,238 INFO L82 PathProgramCache]: Analyzing trace with hash -332531425, now seen corresponding path program 33 times [2018-09-30 23:32:58,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:58,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:58,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:58,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:58,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:58,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:58,775 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:58,775 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:58,782 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:32:58,836 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 23:32:58,836 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:58,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:58,854 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:58,884 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:58,884 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 23:32:58,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 23:32:58,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 23:32:58,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:32:58,885 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 38 states. [2018-09-30 23:32:59,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:59,628 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-09-30 23:32:59,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 23:32:59,628 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-30 23:32:59,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:59,629 INFO L225 Difference]: With dead ends: 116 [2018-09-30 23:32:59,629 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 23:32:59,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=757, Invalid=2323, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:32:59,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 23:32:59,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 23:32:59,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 23:32:59,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-09-30 23:32:59,644 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2018-09-30 23:32:59,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:59,644 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-09-30 23:32:59,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 23:32:59,644 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-09-30 23:32:59,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 23:32:59,645 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:59,645 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1] [2018-09-30 23:32:59,645 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:59,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:59,645 INFO L82 PathProgramCache]: Analyzing trace with hash -198022311, now seen corresponding path program 34 times [2018-09-30 23:32:59,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:59,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:59,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:59,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:59,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:59,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:00,246 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:00,247 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:00,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:00,254 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:33:00,301 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:33:00,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:00,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:00,344 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:00,364 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:00,364 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-09-30 23:33:00,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:33:00,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:33:00,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:33:00,365 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2018-09-30 23:33:00,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:00,819 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-09-30 23:33:00,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 23:33:00,820 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2018-09-30 23:33:00,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:00,821 INFO L225 Difference]: With dead ends: 85 [2018-09-30 23:33:00,821 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 23:33:00,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=674, Invalid=1132, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:33:00,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 23:33:00,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-09-30 23:33:00,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 23:33:00,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-09-30 23:33:00,835 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2018-09-30 23:33:00,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:00,835 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-09-30 23:33:00,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:33:00,836 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-09-30 23:33:00,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 23:33:00,836 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:00,836 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2018-09-30 23:33:00,837 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:00,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:00,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1320946603, now seen corresponding path program 35 times [2018-09-30 23:33:00,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:00,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:00,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:00,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:00,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:01,553 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:01,553 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:01,560 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:33:01,615 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 23:33:01,615 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:01,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:01,629 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:01,650 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:01,650 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 23:33:01,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 23:33:01,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 23:33:01,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:33:01,651 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 40 states. [2018-09-30 23:33:02,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:02,467 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-09-30 23:33:02,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 23:33:02,468 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-30 23:33:02,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:02,468 INFO L225 Difference]: With dead ends: 122 [2018-09-30 23:33:02,468 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 23:33:02,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=837, Invalid=2585, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:33:02,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 23:33:02,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 23:33:02,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 23:33:02,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-09-30 23:33:02,480 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2018-09-30 23:33:02,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:02,480 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-09-30 23:33:02,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 23:33:02,480 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-09-30 23:33:02,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 23:33:02,481 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:02,481 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1] [2018-09-30 23:33:02,481 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:02,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:02,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1626388879, now seen corresponding path program 36 times [2018-09-30 23:33:02,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:02,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:02,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:02,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:02,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:02,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:02,921 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:02,922 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:02,922 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:02,930 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:33:03,163 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-30 23:33:03,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:03,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:03,367 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:03,367 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2018-09-30 23:33:03,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 23:33:03,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 23:33:03,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:33:03,368 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 25 states. [2018-09-30 23:33:03,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:03,773 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-09-30 23:33:03,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 23:33:03,774 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2018-09-30 23:33:03,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:03,775 INFO L225 Difference]: With dead ends: 89 [2018-09-30 23:33:03,775 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 23:33:03,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=739, Invalid=1241, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:33:03,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 23:33:03,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2018-09-30 23:33:03,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 23:33:03,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-09-30 23:33:03,793 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2018-09-30 23:33:03,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:03,793 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-09-30 23:33:03,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 23:33:03,793 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-09-30 23:33:03,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 23:33:03,794 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:03,794 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-09-30 23:33:03,794 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:03,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:03,794 INFO L82 PathProgramCache]: Analyzing trace with hash -408449781, now seen corresponding path program 37 times [2018-09-30 23:33:03,794 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:03,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:03,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:03,795 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:03,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:04,459 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:04,459 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:04,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:04,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:04,537 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:04,566 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:04,567 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 23:33:04,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 23:33:04,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 23:33:04,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:33:04,568 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 42 states. [2018-09-30 23:33:06,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:06,196 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-09-30 23:33:06,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 23:33:06,196 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-30 23:33:06,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:06,197 INFO L225 Difference]: With dead ends: 128 [2018-09-30 23:33:06,197 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 23:33:06,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=921, Invalid=2861, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:33:06,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 23:33:06,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 23:33:06,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 23:33:06,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-09-30 23:33:06,218 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2018-09-30 23:33:06,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:06,218 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-09-30 23:33:06,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 23:33:06,219 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-09-30 23:33:06,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 23:33:06,219 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:06,219 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1] [2018-09-30 23:33:06,220 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:06,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:06,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1130683067, now seen corresponding path program 38 times [2018-09-30 23:33:06,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:06,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:06,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:06,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:06,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:06,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:06,574 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:06,574 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:06,582 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:33:06,637 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:33:06,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:06,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:06,700 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:06,700 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-09-30 23:33:06,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 23:33:06,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 23:33:06,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:33:06,701 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2018-09-30 23:33:07,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:07,267 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-09-30 23:33:07,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 23:33:07,267 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2018-09-30 23:33:07,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:07,268 INFO L225 Difference]: With dead ends: 93 [2018-09-30 23:33:07,268 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 23:33:07,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=807, Invalid=1355, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:33:07,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 23:33:07,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2018-09-30 23:33:07,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 23:33:07,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-09-30 23:33:07,281 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2018-09-30 23:33:07,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:07,281 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-09-30 23:33:07,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 23:33:07,281 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-09-30 23:33:07,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 23:33:07,281 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:07,281 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2018-09-30 23:33:07,282 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:07,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:07,282 INFO L82 PathProgramCache]: Analyzing trace with hash 40231745, now seen corresponding path program 39 times [2018-09-30 23:33:07,282 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:07,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:07,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:07,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:07,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:07,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:08,302 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:08,302 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:08,302 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:08,311 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:33:08,378 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-30 23:33:08,378 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:08,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:08,417 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:08,417 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 23:33:08,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 23:33:08,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 23:33:08,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1387, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:33:08,418 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 44 states. [2018-09-30 23:33:09,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:09,430 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-09-30 23:33:09,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 23:33:09,430 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-30 23:33:09,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:09,431 INFO L225 Difference]: With dead ends: 134 [2018-09-30 23:33:09,431 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 23:33:09,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1009, Invalid=3151, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:33:09,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 23:33:09,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-30 23:33:09,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 23:33:09,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-09-30 23:33:09,444 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2018-09-30 23:33:09,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:09,444 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-09-30 23:33:09,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 23:33:09,444 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-09-30 23:33:09,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 23:33:09,445 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:09,445 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1] [2018-09-30 23:33:09,445 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:09,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:09,445 INFO L82 PathProgramCache]: Analyzing trace with hash -2030121349, now seen corresponding path program 40 times [2018-09-30 23:33:09,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:09,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:09,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:09,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:09,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:09,850 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:09,850 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:09,859 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:33:09,923 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:33:09,923 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:09,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:09,989 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:10,011 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:10,012 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2018-09-30 23:33:10,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 23:33:10,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 23:33:10,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:33:10,013 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 27 states. [2018-09-30 23:33:10,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:10,634 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-09-30 23:33:10,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 23:33:10,635 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 88 [2018-09-30 23:33:10,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:10,635 INFO L225 Difference]: With dead ends: 97 [2018-09-30 23:33:10,635 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 23:33:10,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=878, Invalid=1474, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:33:10,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 23:33:10,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2018-09-30 23:33:10,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 23:33:10,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-09-30 23:33:10,651 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2018-09-30 23:33:10,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:10,651 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-09-30 23:33:10,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 23:33:10,652 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-09-30 23:33:10,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 23:33:10,652 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:10,652 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-09-30 23:33:10,652 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:10,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:10,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1031530761, now seen corresponding path program 41 times [2018-09-30 23:33:10,653 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:10,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:10,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:10,653 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:10,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:10,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:11,358 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:11,358 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:11,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:11,365 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:33:11,431 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 23:33:11,431 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:11,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:11,454 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:11,478 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:11,478 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 23:33:11,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 23:33:11,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 23:33:11,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:33:11,479 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 46 states. [2018-09-30 23:33:12,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:12,176 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-09-30 23:33:12,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 23:33:12,177 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-30 23:33:12,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:12,177 INFO L225 Difference]: With dead ends: 140 [2018-09-30 23:33:12,177 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 23:33:12,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1101, Invalid=3455, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:33:12,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 23:33:12,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 23:33:12,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 23:33:12,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-09-30 23:33:12,192 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-09-30 23:33:12,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:12,192 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-09-30 23:33:12,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 23:33:12,192 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-09-30 23:33:12,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 23:33:12,193 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:12,193 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1] [2018-09-30 23:33:12,193 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:12,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:12,193 INFO L82 PathProgramCache]: Analyzing trace with hash 769709361, now seen corresponding path program 42 times [2018-09-30 23:33:12,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:12,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:12,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:12,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:12,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:12,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:12,763 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:12,763 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:12,770 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:33:12,840 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-09-30 23:33:12,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:12,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:12,889 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:12,910 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:12,911 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-09-30 23:33:12,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 23:33:12,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 23:33:12,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:33:12,911 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2018-09-30 23:33:13,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:13,362 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-09-30 23:33:13,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 23:33:13,362 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2018-09-30 23:33:13,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:13,363 INFO L225 Difference]: With dead ends: 101 [2018-09-30 23:33:13,363 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 23:33:13,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=952, Invalid=1598, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:33:13,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 23:33:13,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-09-30 23:33:13,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 23:33:13,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-09-30 23:33:13,378 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2018-09-30 23:33:13,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:13,379 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-09-30 23:33:13,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 23:33:13,379 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-09-30 23:33:13,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 23:33:13,379 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:13,379 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2018-09-30 23:33:13,380 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:13,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:13,380 INFO L82 PathProgramCache]: Analyzing trace with hash 956254253, now seen corresponding path program 43 times [2018-09-30 23:33:13,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:13,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:13,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:13,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:13,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:13,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:14,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:14,160 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:14,160 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:14,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:14,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:14,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:14,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:14,276 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:14,276 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 23:33:14,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 23:33:14,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 23:33:14,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:33:14,277 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 48 states. [2018-09-30 23:33:15,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:15,653 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-09-30 23:33:15,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 23:33:15,654 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-30 23:33:15,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:15,654 INFO L225 Difference]: With dead ends: 146 [2018-09-30 23:33:15,654 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 23:33:15,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1197, Invalid=3773, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:33:15,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 23:33:15,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-30 23:33:15,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 23:33:15,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-09-30 23:33:15,670 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2018-09-30 23:33:15,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:15,670 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-09-30 23:33:15,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 23:33:15,670 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-09-30 23:33:15,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 23:33:15,671 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:15,671 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1] [2018-09-30 23:33:15,671 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:15,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:15,671 INFO L82 PathProgramCache]: Analyzing trace with hash 251550055, now seen corresponding path program 44 times [2018-09-30 23:33:15,672 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:15,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:15,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:15,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:15,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:16,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:16,030 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:16,030 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:16,038 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:33:16,099 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:33:16,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:16,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:16,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:16,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:16,513 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2018-09-30 23:33:16,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 23:33:16,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 23:33:16,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:33:16,514 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 29 states. [2018-09-30 23:33:17,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:17,375 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-09-30 23:33:17,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 23:33:17,376 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 96 [2018-09-30 23:33:17,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:17,377 INFO L225 Difference]: With dead ends: 105 [2018-09-30 23:33:17,377 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 23:33:17,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1029, Invalid=1727, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:33:17,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 23:33:17,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-09-30 23:33:17,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 23:33:17,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-09-30 23:33:17,397 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-09-30 23:33:17,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:17,398 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-09-30 23:33:17,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 23:33:17,398 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-09-30 23:33:17,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 23:33:17,398 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:17,399 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-09-30 23:33:17,399 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:17,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:17,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1221367523, now seen corresponding path program 45 times [2018-09-30 23:33:17,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:17,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:17,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:17,400 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:17,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:17,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:18,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:18,389 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:18,389 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:18,398 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:33:18,474 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-30 23:33:18,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:18,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:18,532 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:18,533 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 23:33:18,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 23:33:18,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 23:33:18,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:33:18,534 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 50 states. [2018-09-30 23:33:20,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:20,780 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-09-30 23:33:20,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 23:33:20,780 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-30 23:33:20,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:20,781 INFO L225 Difference]: With dead ends: 152 [2018-09-30 23:33:20,781 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 23:33:20,782 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1297, Invalid=4105, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:33:20,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 23:33:20,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 23:33:20,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 23:33:20,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-09-30 23:33:20,800 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2018-09-30 23:33:20,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:20,800 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-09-30 23:33:20,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 23:33:20,800 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-09-30 23:33:20,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 23:33:20,801 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:20,801 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1] [2018-09-30 23:33:20,801 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:20,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:20,801 INFO L82 PathProgramCache]: Analyzing trace with hash -99845347, now seen corresponding path program 46 times [2018-09-30 23:33:20,801 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:20,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:20,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:20,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:20,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:20,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:21,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:21,401 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:21,401 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:21,409 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:33:21,475 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:33:21,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:21,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:21,545 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:21,546 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-09-30 23:33:21,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 23:33:21,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 23:33:21,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:33:21,546 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2018-09-30 23:33:22,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:22,074 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-09-30 23:33:22,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 23:33:22,074 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2018-09-30 23:33:22,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:22,075 INFO L225 Difference]: With dead ends: 109 [2018-09-30 23:33:22,075 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 23:33:22,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1109, Invalid=1861, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:33:22,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 23:33:22,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2018-09-30 23:33:22,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 23:33:22,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-09-30 23:33:22,096 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2018-09-30 23:33:22,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:22,096 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-09-30 23:33:22,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 23:33:22,097 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-09-30 23:33:22,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 23:33:22,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:22,097 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2018-09-30 23:33:22,097 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:22,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:22,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1462164711, now seen corresponding path program 47 times [2018-09-30 23:33:22,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:22,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:22,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:22,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:22,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:25,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:25,099 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:25,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:25,107 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:33:25,190 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-30 23:33:25,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:25,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:25,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:25,246 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:25,246 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 23:33:25,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 23:33:25,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 23:33:25,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=1951, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:33:25,247 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 52 states. [2018-09-30 23:33:26,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:26,894 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-09-30 23:33:26,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 23:33:26,895 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-30 23:33:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:26,895 INFO L225 Difference]: With dead ends: 158 [2018-09-30 23:33:26,895 INFO L226 Difference]: Without dead ends: 105 [2018-09-30 23:33:26,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1401, Invalid=4451, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:33:26,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-30 23:33:26,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-30 23:33:26,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 23:33:26,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-09-30 23:33:26,919 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2018-09-30 23:33:26,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:26,919 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-09-30 23:33:26,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 23:33:26,919 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-09-30 23:33:26,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 23:33:26,920 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:26,920 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1] [2018-09-30 23:33:26,920 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:26,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:26,920 INFO L82 PathProgramCache]: Analyzing trace with hash 850942547, now seen corresponding path program 48 times [2018-09-30 23:33:26,921 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:26,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:26,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:26,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:26,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:27,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:27,998 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:27,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:28,005 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:33:28,083 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-30 23:33:28,084 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:28,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:28,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:28,151 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:28,151 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2018-09-30 23:33:28,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 23:33:28,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 23:33:28,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:33:28,152 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 31 states. [2018-09-30 23:33:28,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:28,708 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-09-30 23:33:28,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 23:33:28,708 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 104 [2018-09-30 23:33:28,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:28,709 INFO L225 Difference]: With dead ends: 113 [2018-09-30 23:33:28,709 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 23:33:28,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1192, Invalid=2000, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:33:28,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 23:33:28,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2018-09-30 23:33:28,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 23:33:28,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-09-30 23:33:28,735 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2018-09-30 23:33:28,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:28,735 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-09-30 23:33:28,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 23:33:28,735 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-09-30 23:33:28,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 23:33:28,736 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:28,736 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-09-30 23:33:28,736 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:28,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:28,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1711934671, now seen corresponding path program 49 times [2018-09-30 23:33:28,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:28,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:28,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:28,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:28,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:28,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:30,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:30,025 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:30,026 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:30,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:30,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:30,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:30,150 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:30,150 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 23:33:30,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 23:33:30,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 23:33:30,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:33:30,152 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 54 states. [2018-09-30 23:33:31,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:31,982 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-09-30 23:33:31,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 23:33:31,982 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-30 23:33:31,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:31,983 INFO L225 Difference]: With dead ends: 164 [2018-09-30 23:33:31,983 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 23:33:31,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1509, Invalid=4811, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:33:31,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 23:33:32,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 23:33:32,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 23:33:32,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-09-30 23:33:32,003 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2018-09-30 23:33:32,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:32,003 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-09-30 23:33:32,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 23:33:32,004 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-09-30 23:33:32,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 23:33:32,004 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:32,004 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1] [2018-09-30 23:33:32,005 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:32,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:32,005 INFO L82 PathProgramCache]: Analyzing trace with hash -223930615, now seen corresponding path program 50 times [2018-09-30 23:33:32,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:32,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:32,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:32,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:32,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:32,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:32,869 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:32,869 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:32,877 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:33:32,942 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:33:32,942 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:32,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:33,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:33,036 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:33,036 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-09-30 23:33:33,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 23:33:33,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 23:33:33,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:33:33,037 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2018-09-30 23:33:33,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:33,596 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-09-30 23:33:33,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 23:33:33,597 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2018-09-30 23:33:33,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:33,598 INFO L225 Difference]: With dead ends: 117 [2018-09-30 23:33:33,598 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 23:33:33,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1278, Invalid=2144, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:33:33,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 23:33:33,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2018-09-30 23:33:33,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 23:33:33,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-09-30 23:33:33,622 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2018-09-30 23:33:33,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:33,622 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-09-30 23:33:33,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 23:33:33,623 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-09-30 23:33:33,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 23:33:33,623 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:33,624 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2018-09-30 23:33:33,624 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:33,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:33,624 INFO L82 PathProgramCache]: Analyzing trace with hash -449022971, now seen corresponding path program 51 times [2018-09-30 23:33:33,624 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:33,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:33,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:33,625 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:33,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:33,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:34,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:34,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:34,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:34,715 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:33:34,801 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-30 23:33:34,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:34,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:34,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:34,844 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:34,844 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 23:33:34,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 23:33:34,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 23:33:34,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=811, Invalid=2269, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:33:34,846 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 56 states. [2018-09-30 23:33:36,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:36,574 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-09-30 23:33:36,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 23:33:36,574 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-30 23:33:36,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:36,575 INFO L225 Difference]: With dead ends: 170 [2018-09-30 23:33:36,575 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 23:33:36,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1621, Invalid=5185, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:33:36,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 23:33:36,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-30 23:33:36,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-30 23:33:36,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-09-30 23:33:36,598 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2018-09-30 23:33:36,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:36,598 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-09-30 23:33:36,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 23:33:36,598 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-09-30 23:33:36,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 23:33:36,599 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:36,599 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1] [2018-09-30 23:33:36,599 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:36,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:36,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1802883391, now seen corresponding path program 52 times [2018-09-30 23:33:36,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:36,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:36,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:36,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:36,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:36,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:37,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:37,160 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:37,160 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:37,167 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:33:37,228 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:33:37,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:37,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:37,524 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:37,524 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2018-09-30 23:33:37,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 23:33:37,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 23:33:37,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:33:37,525 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 33 states. [2018-09-30 23:33:38,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:38,066 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-09-30 23:33:38,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 23:33:38,066 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 112 [2018-09-30 23:33:38,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:38,068 INFO L225 Difference]: With dead ends: 121 [2018-09-30 23:33:38,068 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 23:33:38,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1367, Invalid=2293, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:33:38,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 23:33:38,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2018-09-30 23:33:38,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 23:33:38,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-09-30 23:33:38,096 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2018-09-30 23:33:38,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:38,096 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-09-30 23:33:38,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 23:33:38,096 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-09-30 23:33:38,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 23:33:38,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:38,097 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-09-30 23:33:38,097 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:38,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:38,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1699051707, now seen corresponding path program 53 times [2018-09-30 23:33:38,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:38,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:38,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:38,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:38,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:39,342 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:39,342 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:39,367 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:33:39,454 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-30 23:33:39,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:39,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:39,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:39,511 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:39,511 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 23:33:39,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 23:33:39,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 23:33:39,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:33:39,512 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 58 states. [2018-09-30 23:33:41,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:41,181 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-09-30 23:33:41,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 23:33:41,181 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-30 23:33:41,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:41,182 INFO L225 Difference]: With dead ends: 176 [2018-09-30 23:33:41,182 INFO L226 Difference]: Without dead ends: 117 [2018-09-30 23:33:41,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1737, Invalid=5573, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:33:41,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-30 23:33:41,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-30 23:33:41,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 23:33:41,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-09-30 23:33:41,203 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-09-30 23:33:41,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:41,203 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-09-30 23:33:41,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 23:33:41,204 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-09-30 23:33:41,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 23:33:41,204 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:41,204 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1] [2018-09-30 23:33:41,205 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:41,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:41,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1220126965, now seen corresponding path program 54 times [2018-09-30 23:33:41,205 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:41,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:41,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:41,206 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:41,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:41,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:41,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:41,658 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:41,658 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:41,665 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:33:41,758 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-09-30 23:33:41,759 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:41,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:42,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:42,052 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:42,052 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-09-30 23:33:42,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 23:33:42,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 23:33:42,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:33:42,053 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2018-09-30 23:33:42,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:42,679 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2018-09-30 23:33:42,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 23:33:42,680 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2018-09-30 23:33:42,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:42,681 INFO L225 Difference]: With dead ends: 125 [2018-09-30 23:33:42,681 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 23:33:42,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1459, Invalid=2447, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:33:42,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 23:33:42,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-09-30 23:33:42,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 23:33:42,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-09-30 23:33:42,709 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2018-09-30 23:33:42,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:42,709 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-09-30 23:33:42,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 23:33:42,709 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-09-30 23:33:42,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 23:33:42,710 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:42,710 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1] [2018-09-30 23:33:42,710 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:42,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:42,710 INFO L82 PathProgramCache]: Analyzing trace with hash 15874801, now seen corresponding path program 55 times [2018-09-30 23:33:42,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:42,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:42,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:42,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:42,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:44,199 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:44,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:44,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:44,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:44,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:44,339 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:44,339 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 23:33:44,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 23:33:44,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 23:33:44,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:33:44,341 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 60 states. [2018-09-30 23:33:46,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:46,372 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2018-09-30 23:33:46,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 23:33:46,372 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-09-30 23:33:46,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:46,373 INFO L225 Difference]: With dead ends: 182 [2018-09-30 23:33:46,373 INFO L226 Difference]: Without dead ends: 121 [2018-09-30 23:33:46,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1857, Invalid=5975, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:33:46,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-30 23:33:46,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-30 23:33:46,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 23:33:46,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-09-30 23:33:46,392 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2018-09-30 23:33:46,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:46,392 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-09-30 23:33:46,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 23:33:46,392 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-09-30 23:33:46,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-30 23:33:46,392 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:46,392 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1] [2018-09-30 23:33:46,393 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:46,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:46,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1308639701, now seen corresponding path program 56 times [2018-09-30 23:33:46,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:46,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:46,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:46,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:46,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:46,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:46,962 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:46,962 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:46,971 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:33:47,042 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:33:47,043 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:47,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:47,310 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:47,310 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2018-09-30 23:33:47,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 23:33:47,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 23:33:47,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:33:47,311 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 35 states. [2018-09-30 23:33:47,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:47,928 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2018-09-30 23:33:47,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 23:33:47,928 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 120 [2018-09-30 23:33:47,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:47,929 INFO L225 Difference]: With dead ends: 129 [2018-09-30 23:33:47,929 INFO L226 Difference]: Without dead ends: 127 [2018-09-30 23:33:47,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1554, Invalid=2606, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:33:47,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-30 23:33:47,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2018-09-30 23:33:47,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-30 23:33:47,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-09-30 23:33:47,954 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-09-30 23:33:47,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:47,954 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-09-30 23:33:47,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 23:33:47,954 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-09-30 23:33:47,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 23:33:47,955 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:47,955 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-09-30 23:33:47,955 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:47,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:47,955 INFO L82 PathProgramCache]: Analyzing trace with hash 822598311, now seen corresponding path program 57 times [2018-09-30 23:33:47,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:47,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:47,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:47,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:47,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:49,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:49,215 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:49,215 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:49,223 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:33:49,349 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-30 23:33:49,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:49,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:49,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:49,410 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:49,410 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 23:33:49,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 23:33:49,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 23:33:49,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:33:49,412 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 62 states. [2018-09-30 23:33:52,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:52,419 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2018-09-30 23:33:52,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 23:33:52,419 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-09-30 23:33:52,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:52,420 INFO L225 Difference]: With dead ends: 188 [2018-09-30 23:33:52,420 INFO L226 Difference]: Without dead ends: 125 [2018-09-30 23:33:52,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1981, Invalid=6391, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:33:52,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-30 23:33:52,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-30 23:33:52,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-30 23:33:52,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-09-30 23:33:52,450 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2018-09-30 23:33:52,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:52,450 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-09-30 23:33:52,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 23:33:52,451 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-09-30 23:33:52,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-30 23:33:52,451 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:52,451 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1] [2018-09-30 23:33:52,452 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:52,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:52,452 INFO L82 PathProgramCache]: Analyzing trace with hash -858967839, now seen corresponding path program 58 times [2018-09-30 23:33:52,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:52,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:52,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:52,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:52,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:52,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:52,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:52,964 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:52,964 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:52,991 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:33:53,070 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:33:53,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:53,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:53,245 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:53,245 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-09-30 23:33:53,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 23:33:53,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 23:33:53,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:33:53,246 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2018-09-30 23:33:53,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:53,910 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-09-30 23:33:53,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 23:33:53,911 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2018-09-30 23:33:53,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:53,912 INFO L225 Difference]: With dead ends: 133 [2018-09-30 23:33:53,912 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 23:33:53,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1652, Invalid=2770, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:33:53,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 23:33:53,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2018-09-30 23:33:53,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-30 23:33:53,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-09-30 23:33:53,936 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2018-09-30 23:33:53,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:53,937 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-09-30 23:33:53,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 23:33:53,937 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-09-30 23:33:53,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-30 23:33:53,937 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:53,937 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1] [2018-09-30 23:33:53,938 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:53,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:53,938 INFO L82 PathProgramCache]: Analyzing trace with hash -834439203, now seen corresponding path program 59 times [2018-09-30 23:33:53,938 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:53,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:53,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:53,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:53,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:53,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:55,088 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:55,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:55,096 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:33:55,198 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-30 23:33:55,198 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:55,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:55,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:55,262 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:55,262 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 23:33:55,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 23:33:55,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 23:33:55,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1055, Invalid=2977, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:33:55,263 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 64 states. [2018-09-30 23:33:57,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:57,473 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2018-09-30 23:33:57,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 23:33:57,473 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-09-30 23:33:57,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:57,474 INFO L225 Difference]: With dead ends: 194 [2018-09-30 23:33:57,474 INFO L226 Difference]: Without dead ends: 129 [2018-09-30 23:33:57,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2109, Invalid=6821, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:33:57,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-30 23:33:57,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-30 23:33:57,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-30 23:33:57,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-09-30 23:33:57,498 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2018-09-30 23:33:57,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:57,498 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-09-30 23:33:57,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 23:33:57,498 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-09-30 23:33:57,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 23:33:57,499 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:57,499 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1] [2018-09-30 23:33:57,499 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:57,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:57,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1096867561, now seen corresponding path program 60 times [2018-09-30 23:33:57,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:57,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:57,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:57,500 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:57,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:57,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:58,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:58,101 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:58,101 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:58,110 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:33:58,217 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-09-30 23:33:58,217 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:58,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:58,355 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:58,355 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2018-09-30 23:33:58,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 23:33:58,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 23:33:58,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:33:58,356 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 37 states. [2018-09-30 23:33:59,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:59,063 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2018-09-30 23:33:59,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 23:33:59,063 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 128 [2018-09-30 23:33:59,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:59,064 INFO L225 Difference]: With dead ends: 137 [2018-09-30 23:33:59,064 INFO L226 Difference]: Without dead ends: 135 [2018-09-30 23:33:59,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1753, Invalid=2939, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:33:59,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-30 23:33:59,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2018-09-30 23:33:59,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 23:33:59,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-09-30 23:33:59,091 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2018-09-30 23:33:59,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:59,091 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-09-30 23:33:59,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 23:33:59,091 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-09-30 23:33:59,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-30 23:33:59,092 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:59,092 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-09-30 23:33:59,092 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:59,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:59,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1822805357, now seen corresponding path program 61 times [2018-09-30 23:33:59,092 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:59,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:59,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:59,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:59,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:00,491 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:00,491 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:00,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:34:00,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:00,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:00,632 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:00,632 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-30 23:34:00,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 23:34:00,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 23:34:00,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:34:00,634 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 66 states. [2018-09-30 23:34:03,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:03,009 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2018-09-30 23:34:03,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 23:34:03,010 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-09-30 23:34:03,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:03,010 INFO L225 Difference]: With dead ends: 200 [2018-09-30 23:34:03,010 INFO L226 Difference]: Without dead ends: 133 [2018-09-30 23:34:03,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2241, Invalid=7265, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:34:03,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-30 23:34:03,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-30 23:34:03,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 23:34:03,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-09-30 23:34:03,036 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2018-09-30 23:34:03,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:03,036 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-09-30 23:34:03,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 23:34:03,036 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-09-30 23:34:03,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-30 23:34:03,036 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:03,036 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1] [2018-09-30 23:34:03,037 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:03,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:03,037 INFO L82 PathProgramCache]: Analyzing trace with hash 787132109, now seen corresponding path program 62 times [2018-09-30 23:34:03,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:03,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:03,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:03,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:34:03,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:03,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:03,773 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:03,773 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:03,782 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:34:03,864 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:34:03,865 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:03,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:04,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:04,150 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:04,150 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-09-30 23:34:04,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 23:34:04,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 23:34:04,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:34:04,151 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2018-09-30 23:34:04,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:04,973 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2018-09-30 23:34:04,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 23:34:04,973 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2018-09-30 23:34:04,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:04,974 INFO L225 Difference]: With dead ends: 141 [2018-09-30 23:34:04,975 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 23:34:04,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1857, Invalid=3113, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:34:04,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 23:34:05,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-09-30 23:34:05,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-30 23:34:05,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-09-30 23:34:05,001 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2018-09-30 23:34:05,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:05,001 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-09-30 23:34:05,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 23:34:05,001 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-09-30 23:34:05,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-30 23:34:05,002 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:05,002 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1] [2018-09-30 23:34:05,003 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:05,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:05,003 INFO L82 PathProgramCache]: Analyzing trace with hash 519645897, now seen corresponding path program 63 times [2018-09-30 23:34:05,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:05,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:05,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:05,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:05,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:06,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:06,487 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:06,487 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:06,497 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:34:06,618 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-30 23:34:06,619 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:06,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:06,685 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:06,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 23:34:06,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 23:34:06,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 23:34:06,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=3367, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:34:06,686 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 68 states. [2018-09-30 23:34:09,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:09,024 INFO L93 Difference]: Finished difference Result 206 states and 208 transitions. [2018-09-30 23:34:09,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 23:34:09,024 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-09-30 23:34:09,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:09,025 INFO L225 Difference]: With dead ends: 206 [2018-09-30 23:34:09,025 INFO L226 Difference]: Without dead ends: 137 [2018-09-30 23:34:09,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2377, Invalid=7723, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 23:34:09,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-30 23:34:09,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-30 23:34:09,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-30 23:34:09,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2018-09-30 23:34:09,052 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2018-09-30 23:34:09,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:09,052 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2018-09-30 23:34:09,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 23:34:09,052 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2018-09-30 23:34:09,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-30 23:34:09,053 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:09,053 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 1, 1, 1, 1] [2018-09-30 23:34:09,053 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:09,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:09,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1226635779, now seen corresponding path program 64 times [2018-09-30 23:34:09,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:09,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:09,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:09,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:09,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:09,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:09,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:09,654 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:09,654 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:09,663 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:34:09,751 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:34:09,752 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:09,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:09,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:09,837 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:09,837 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2018-09-30 23:34:09,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 23:34:09,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 23:34:09,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:34:09,838 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 39 states. [2018-09-30 23:34:10,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:10,583 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-09-30 23:34:10,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 23:34:10,584 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 136 [2018-09-30 23:34:10,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:10,584 INFO L225 Difference]: With dead ends: 145 [2018-09-30 23:34:10,585 INFO L226 Difference]: Without dead ends: 143 [2018-09-30 23:34:10,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1964, Invalid=3292, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 23:34:10,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-30 23:34:10,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-09-30 23:34:10,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-30 23:34:10,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-09-30 23:34:10,612 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2018-09-30 23:34:10,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:10,613 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-09-30 23:34:10,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 23:34:10,613 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-09-30 23:34:10,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-30 23:34:10,613 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:10,613 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-09-30 23:34:10,614 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:10,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:10,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1975877759, now seen corresponding path program 65 times [2018-09-30 23:34:10,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:10,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:10,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:10,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:10,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:12,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:12,290 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:12,290 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:12,299 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:34:12,415 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-30 23:34:12,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:12,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:12,468 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:12,468 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 23:34:12,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 23:34:12,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 23:34:12,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1259, Invalid=3571, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:34:12,470 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 70 states. [2018-09-30 23:34:14,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:14,855 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2018-09-30 23:34:14,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 23:34:14,855 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-09-30 23:34:14,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:14,856 INFO L225 Difference]: With dead ends: 212 [2018-09-30 23:34:14,856 INFO L226 Difference]: Without dead ends: 141 [2018-09-30 23:34:14,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2517, Invalid=8195, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 23:34:14,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-30 23:34:14,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-30 23:34:14,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-30 23:34:14,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-09-30 23:34:14,898 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-09-30 23:34:14,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:14,898 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-09-30 23:34:14,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 23:34:14,899 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-09-30 23:34:14,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-30 23:34:14,899 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:14,899 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 1, 1, 1, 1] [2018-09-30 23:34:14,899 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:14,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:14,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1050354361, now seen corresponding path program 66 times [2018-09-30 23:34:14,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:14,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:14,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:14,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:14,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:15,505 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:15,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:15,514 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:34:15,629 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-09-30 23:34:15,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:15,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:15,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:15,910 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:15,910 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-09-30 23:34:15,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 23:34:15,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 23:34:15,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:34:15,911 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 40 states. [2018-09-30 23:34:16,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:16,848 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2018-09-30 23:34:16,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 23:34:16,848 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 140 [2018-09-30 23:34:16,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:16,849 INFO L225 Difference]: With dead ends: 149 [2018-09-30 23:34:16,849 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 23:34:16,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2074, Invalid=3476, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 23:34:16,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 23:34:16,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2018-09-30 23:34:16,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-30 23:34:16,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2018-09-30 23:34:16,878 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 140 [2018-09-30 23:34:16,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:16,879 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2018-09-30 23:34:16,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 23:34:16,879 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2018-09-30 23:34:16,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-30 23:34:16,879 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:16,879 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1] [2018-09-30 23:34:16,880 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:16,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:16,880 INFO L82 PathProgramCache]: Analyzing trace with hash 73159605, now seen corresponding path program 67 times [2018-09-30 23:34:16,880 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:16,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:16,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:16,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:16,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:18,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:18,405 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:18,405 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:18,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:34:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:18,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:18,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:18,549 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:18,549 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-30 23:34:18,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 23:34:18,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 23:34:18,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=3781, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:34:18,550 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 72 states. [2018-09-30 23:34:21,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:21,087 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2018-09-30 23:34:21,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 23:34:21,087 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-09-30 23:34:21,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:21,088 INFO L225 Difference]: With dead ends: 218 [2018-09-30 23:34:21,088 INFO L226 Difference]: Without dead ends: 145 [2018-09-30 23:34:21,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2661, Invalid=8681, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 23:34:21,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-30 23:34:21,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-30 23:34:21,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-30 23:34:21,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-09-30 23:34:21,125 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 142 [2018-09-30 23:34:21,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:21,126 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-09-30 23:34:21,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 23:34:21,126 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-09-30 23:34:21,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-30 23:34:21,127 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:21,127 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 1, 1, 1, 1] [2018-09-30 23:34:21,127 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:21,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:21,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1220692207, now seen corresponding path program 68 times [2018-09-30 23:34:21,128 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:21,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:21,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:21,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:34:21,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:22,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:22,085 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:22,085 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:22,091 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:34:22,176 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:34:22,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:22,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:22,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:22,277 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:22,278 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2018-09-30 23:34:22,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 23:34:22,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 23:34:22,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=894, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:34:22,279 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 41 states. [2018-09-30 23:34:23,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:23,077 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2018-09-30 23:34:23,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 23:34:23,077 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 144 [2018-09-30 23:34:23,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:23,078 INFO L225 Difference]: With dead ends: 153 [2018-09-30 23:34:23,078 INFO L226 Difference]: Without dead ends: 151 [2018-09-30 23:34:23,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2187, Invalid=3665, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:34:23,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-30 23:34:23,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2018-09-30 23:34:23,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-30 23:34:23,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-09-30 23:34:23,115 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-09-30 23:34:23,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:23,116 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-09-30 23:34:23,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 23:34:23,116 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-09-30 23:34:23,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 23:34:23,117 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:23,117 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-09-30 23:34:23,117 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:23,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:23,117 INFO L82 PathProgramCache]: Analyzing trace with hash 559072363, now seen corresponding path program 69 times [2018-09-30 23:34:23,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:23,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:23,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:23,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:23,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:23,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:24,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:24,640 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:24,641 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:24,648 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:34:24,780 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-30 23:34:24,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:24,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:24,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:24,830 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:24,830 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 23:34:24,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 23:34:24,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 23:34:24,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:34:24,831 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 74 states. [2018-09-30 23:34:27,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:27,740 INFO L93 Difference]: Finished difference Result 224 states and 226 transitions. [2018-09-30 23:34:27,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 23:34:27,740 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-09-30 23:34:27,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:27,741 INFO L225 Difference]: With dead ends: 224 [2018-09-30 23:34:27,741 INFO L226 Difference]: Without dead ends: 149 [2018-09-30 23:34:27,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1855 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2809, Invalid=9181, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 23:34:27,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-30 23:34:27,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-30 23:34:27,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-30 23:34:27,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2018-09-30 23:34:27,780 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2018-09-30 23:34:27,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:27,780 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2018-09-30 23:34:27,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 23:34:27,780 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2018-09-30 23:34:27,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-30 23:34:27,781 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:27,781 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 35, 1, 1, 1, 1] [2018-09-30 23:34:27,782 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:27,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:27,782 INFO L82 PathProgramCache]: Analyzing trace with hash 719817893, now seen corresponding path program 70 times [2018-09-30 23:34:27,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:27,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:27,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:27,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:27,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:27,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:28,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:28,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:28,467 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:28,475 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:34:28,568 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:34:28,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:28,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:28,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:28,669 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:28,669 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-09-30 23:34:28,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 23:34:28,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 23:34:28,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:34:28,670 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 42 states. [2018-09-30 23:34:29,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:29,532 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-09-30 23:34:29,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 23:34:29,532 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 148 [2018-09-30 23:34:29,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:29,533 INFO L225 Difference]: With dead ends: 157 [2018-09-30 23:34:29,533 INFO L226 Difference]: Without dead ends: 155 [2018-09-30 23:34:29,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2303, Invalid=3859, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:34:29,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-30 23:34:29,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2018-09-30 23:34:29,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-30 23:34:29,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2018-09-30 23:34:29,575 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 148 [2018-09-30 23:34:29,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:29,575 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2018-09-30 23:34:29,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 23:34:29,575 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2018-09-30 23:34:29,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-30 23:34:29,576 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:29,576 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1] [2018-09-30 23:34:29,576 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:29,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:29,577 INFO L82 PathProgramCache]: Analyzing trace with hash 255193761, now seen corresponding path program 71 times [2018-09-30 23:34:29,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:29,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:29,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:29,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:29,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:31,230 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:31,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:31,236 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:34:31,363 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-30 23:34:31,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:31,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:31,414 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:31,415 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 23:34:31,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 23:34:31,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 23:34:31,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1481, Invalid=4219, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:34:31,416 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 76 states. [2018-09-30 23:34:34,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:34,432 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2018-09-30 23:34:34,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 23:34:34,432 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-09-30 23:34:34,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:34,433 INFO L225 Difference]: With dead ends: 230 [2018-09-30 23:34:34,433 INFO L226 Difference]: Without dead ends: 153 [2018-09-30 23:34:34,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2961, Invalid=9695, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 23:34:34,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-30 23:34:34,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-30 23:34:34,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-30 23:34:34,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-09-30 23:34:34,473 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2018-09-30 23:34:34,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:34,473 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-09-30 23:34:34,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 23:34:34,473 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-09-30 23:34:34,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-30 23:34:34,474 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:34,474 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 36, 1, 1, 1, 1] [2018-09-30 23:34:34,474 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:34,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:34,474 INFO L82 PathProgramCache]: Analyzing trace with hash 878185947, now seen corresponding path program 72 times [2018-09-30 23:34:34,474 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:34,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:34,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:34,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:34,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:35,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:35,177 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:35,178 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:35,185 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:34:35,319 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-09-30 23:34:35,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:35,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:35,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:35,407 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:35,407 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2018-09-30 23:34:35,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 23:34:35,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 23:34:35,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=981, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:34:35,408 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 43 states. [2018-09-30 23:34:36,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:36,292 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2018-09-30 23:34:36,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 23:34:36,293 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 152 [2018-09-30 23:34:36,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:36,294 INFO L225 Difference]: With dead ends: 161 [2018-09-30 23:34:36,294 INFO L226 Difference]: Without dead ends: 159 [2018-09-30 23:34:36,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2422, Invalid=4058, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 23:34:36,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-30 23:34:36,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2018-09-30 23:34:36,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-30 23:34:36,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-09-30 23:34:36,329 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2018-09-30 23:34:36,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:36,330 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-09-30 23:34:36,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 23:34:36,330 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-09-30 23:34:36,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-30 23:34:36,330 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:36,330 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-09-30 23:34:36,331 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:36,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:36,331 INFO L82 PathProgramCache]: Analyzing trace with hash 2123038295, now seen corresponding path program 73 times [2018-09-30 23:34:36,331 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:36,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:36,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:36,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:36,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:38,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:38,295 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:38,295 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:38,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:34:38,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:38,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:38,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:38,442 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:38,442 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-30 23:34:38,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 23:34:38,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 23:34:38,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=4447, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:34:38,443 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 78 states. [2018-09-30 23:34:41,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:41,408 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2018-09-30 23:34:41,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 23:34:41,409 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-09-30 23:34:41,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:41,409 INFO L225 Difference]: With dead ends: 236 [2018-09-30 23:34:41,410 INFO L226 Difference]: Without dead ends: 157 [2018-09-30 23:34:41,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3117, Invalid=10223, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 23:34:41,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-30 23:34:41,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-30 23:34:41,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-30 23:34:41,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2018-09-30 23:34:41,443 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2018-09-30 23:34:41,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:41,444 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2018-09-30 23:34:41,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 23:34:41,444 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2018-09-30 23:34:41,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-30 23:34:41,444 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:41,444 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 37, 1, 1, 1, 1] [2018-09-30 23:34:41,445 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:41,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:41,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1034359663, now seen corresponding path program 74 times [2018-09-30 23:34:41,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:41,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:41,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:41,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:34:41,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:42,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:42,490 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:42,490 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:42,497 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:34:42,590 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:34:42,590 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:42,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:42,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:42,671 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:42,671 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-09-30 23:34:42,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 23:34:42,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 23:34:42,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:34:42,672 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 44 states. [2018-09-30 23:34:43,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:43,597 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2018-09-30 23:34:43,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 23:34:43,597 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 156 [2018-09-30 23:34:43,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:43,599 INFO L225 Difference]: With dead ends: 165 [2018-09-30 23:34:43,600 INFO L226 Difference]: Without dead ends: 163 [2018-09-30 23:34:43,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2544, Invalid=4262, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:34:43,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-30 23:34:43,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-09-30 23:34:43,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-30 23:34:43,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2018-09-30 23:34:43,640 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2018-09-30 23:34:43,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:43,640 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2018-09-30 23:34:43,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 23:34:43,640 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2018-09-30 23:34:43,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-30 23:34:43,641 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:43,641 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1] [2018-09-30 23:34:43,641 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:43,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:43,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1882257523, now seen corresponding path program 75 times [2018-09-30 23:34:43,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:43,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:43,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:43,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:43,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:43,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:45,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:45,415 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:45,415 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:45,423 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:34:45,564 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-30 23:34:45,564 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:45,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:45,635 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:45,636 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 23:34:45,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 23:34:45,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 23:34:45,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1639, Invalid=4681, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:34:45,637 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 80 states. [2018-09-30 23:34:49,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:49,075 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2018-09-30 23:34:49,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 23:34:49,075 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-09-30 23:34:49,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:49,076 INFO L225 Difference]: With dead ends: 242 [2018-09-30 23:34:49,076 INFO L226 Difference]: Without dead ends: 161 [2018-09-30 23:34:49,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3277, Invalid=10765, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 23:34:49,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-30 23:34:49,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-30 23:34:49,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-30 23:34:49,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-09-30 23:34:49,123 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 158 [2018-09-30 23:34:49,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:49,123 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-09-30 23:34:49,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 23:34:49,124 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-09-30 23:34:49,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-30 23:34:49,124 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:49,125 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 38, 1, 1, 1, 1] [2018-09-30 23:34:49,125 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:49,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:49,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1109870791, now seen corresponding path program 76 times [2018-09-30 23:34:49,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:49,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:49,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:49,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:49,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:50,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:50,026 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:50,026 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:50,036 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:34:50,132 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:34:50,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:50,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:50,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:50,247 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:50,247 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2018-09-30 23:34:50,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 23:34:50,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 23:34:50,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=1072, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:34:50,248 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 45 states. [2018-09-30 23:34:51,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:51,214 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2018-09-30 23:34:51,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 23:34:51,215 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 160 [2018-09-30 23:34:51,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:51,216 INFO L225 Difference]: With dead ends: 169 [2018-09-30 23:34:51,216 INFO L226 Difference]: Without dead ends: 167 [2018-09-30 23:34:51,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2669, Invalid=4471, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 23:34:51,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-30 23:34:51,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2018-09-30 23:34:51,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-30 23:34:51,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-09-30 23:34:51,255 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2018-09-30 23:34:51,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:51,256 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-09-30 23:34:51,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 23:34:51,256 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-09-30 23:34:51,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-30 23:34:51,256 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:51,257 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-09-30 23:34:51,257 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:51,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:51,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1433873987, now seen corresponding path program 77 times [2018-09-30 23:34:51,257 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:51,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:51,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:51,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:51,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:51,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:53,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:53,440 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:53,440 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:53,449 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:34:53,603 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-30 23:34:53,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:53,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:53,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:53,678 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:53,678 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 23:34:53,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 23:34:53,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 23:34:53,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1721, Invalid=4921, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:34:53,679 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 82 states. [2018-09-30 23:34:57,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:57,240 INFO L93 Difference]: Finished difference Result 248 states and 250 transitions. [2018-09-30 23:34:57,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 23:34:57,240 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-09-30 23:34:57,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:57,241 INFO L225 Difference]: With dead ends: 248 [2018-09-30 23:34:57,241 INFO L226 Difference]: Without dead ends: 165 [2018-09-30 23:34:57,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2301 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3441, Invalid=11321, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 23:34:57,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-30 23:34:57,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-30 23:34:57,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-30 23:34:57,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-09-30 23:34:57,277 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2018-09-30 23:34:57,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:57,277 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-09-30 23:34:57,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 23:34:57,277 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-09-30 23:34:57,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-30 23:34:57,278 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:57,278 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 39, 1, 1, 1, 1] [2018-09-30 23:34:57,279 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:57,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:57,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1292352899, now seen corresponding path program 78 times [2018-09-30 23:34:57,279 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:57,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:57,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:57,280 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:57,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:57,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:58,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:58,411 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:58,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:58,419 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:34:58,567 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2018-09-30 23:34:58,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:58,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:58,674 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:58,674 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-09-30 23:34:58,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 23:34:58,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 23:34:58,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:34:58,675 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 46 states. [2018-09-30 23:34:59,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:59,684 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2018-09-30 23:34:59,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 23:34:59,685 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 164 [2018-09-30 23:34:59,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:59,686 INFO L225 Difference]: With dead ends: 173 [2018-09-30 23:34:59,686 INFO L226 Difference]: Without dead ends: 171 [2018-09-30 23:34:59,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2797, Invalid=4685, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:34:59,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-30 23:34:59,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2018-09-30 23:34:59,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-30 23:34:59,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2018-09-30 23:34:59,728 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 164 [2018-09-30 23:34:59,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:59,728 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2018-09-30 23:34:59,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 23:34:59,728 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2018-09-30 23:34:59,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-30 23:34:59,729 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:59,729 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1] [2018-09-30 23:34:59,730 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:59,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:59,730 INFO L82 PathProgramCache]: Analyzing trace with hash -705654151, now seen corresponding path program 79 times [2018-09-30 23:34:59,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:59,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:59,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:59,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:59,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:02,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1640 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:02,213 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:35:02,213 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:35:02,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:35:02,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:02,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:02,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1640 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:02,384 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:35:02,384 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-30 23:35:02,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 23:35:02,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 23:35:02,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1805, Invalid=5167, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:35:02,385 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 84 states. [2018-09-30 23:35:06,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:06,130 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2018-09-30 23:35:06,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 23:35:06,130 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-09-30 23:35:06,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:06,131 INFO L225 Difference]: With dead ends: 254 [2018-09-30 23:35:06,131 INFO L226 Difference]: Without dead ends: 169 [2018-09-30 23:35:06,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2420 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3609, Invalid=11891, Unknown=0, NotChecked=0, Total=15500 [2018-09-30 23:35:06,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-30 23:35:06,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-30 23:35:06,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-30 23:35:06,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2018-09-30 23:35:06,172 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 166 [2018-09-30 23:35:06,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:06,172 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2018-09-30 23:35:06,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 23:35:06,173 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2018-09-30 23:35:06,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-30 23:35:06,173 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:06,173 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 40, 1, 1, 1, 1] [2018-09-30 23:35:06,174 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:06,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:06,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1476855373, now seen corresponding path program 80 times [2018-09-30 23:35:06,174 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:06,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:06,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:06,175 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:35:06,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:06,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:07,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:07,010 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:35:07,010 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:35:07,017 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:35:07,118 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:35:07,118 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:07,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:07,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:07,215 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:35:07,215 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2018-09-30 23:35:07,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 23:35:07,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 23:35:07,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=995, Invalid=1167, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:35:07,216 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 47 states. [2018-09-30 23:35:08,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:08,458 INFO L93 Difference]: Finished difference Result 177 states and 178 transitions. [2018-09-30 23:35:08,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 23:35:08,458 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 168 [2018-09-30 23:35:08,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:08,459 INFO L225 Difference]: With dead ends: 177 [2018-09-30 23:35:08,459 INFO L226 Difference]: Without dead ends: 175 [2018-09-30 23:35:08,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1806 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2928, Invalid=4904, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:35:08,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-30 23:35:08,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2018-09-30 23:35:08,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-30 23:35:08,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-09-30 23:35:08,501 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 168 [2018-09-30 23:35:08,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:08,501 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-09-30 23:35:08,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 23:35:08,501 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-09-30 23:35:08,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-30 23:35:08,502 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:08,502 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1] [2018-09-30 23:35:08,502 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:08,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:08,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1918872529, now seen corresponding path program 81 times [2018-09-30 23:35:08,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:08,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:08,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:08,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:08,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:10,532 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:35:10,532 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:35:10,539 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:35:10,712 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-30 23:35:10,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:10,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:10,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:10,792 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:35:10,792 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-30 23:35:10,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 23:35:10,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 23:35:10,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=5419, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:35:10,793 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 86 states. [2018-09-30 23:35:14,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:14,659 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2018-09-30 23:35:14,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 23:35:14,659 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-09-30 23:35:14,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:14,660 INFO L225 Difference]: With dead ends: 260 [2018-09-30 23:35:14,661 INFO L226 Difference]: Without dead ends: 173 [2018-09-30 23:35:14,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2542 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3781, Invalid=12475, Unknown=0, NotChecked=0, Total=16256 [2018-09-30 23:35:14,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-30 23:35:14,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-30 23:35:14,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-30 23:35:14,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2018-09-30 23:35:14,701 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 170 [2018-09-30 23:35:14,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:14,701 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2018-09-30 23:35:14,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 23:35:14,701 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2018-09-30 23:35:14,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-30 23:35:14,702 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:14,702 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 41, 1, 1, 1, 1] [2018-09-30 23:35:14,702 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:14,702 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:14,703 INFO L82 PathProgramCache]: Analyzing trace with hash -900821399, now seen corresponding path program 82 times [2018-09-30 23:35:14,703 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:14,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:14,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:14,703 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:14,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:14,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:15,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:15,604 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:35:15,604 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:35:15,613 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:35:15,724 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:35:15,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:15,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:15,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:15,821 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:35:15,821 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2018-09-30 23:35:15,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 23:35:15,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 23:35:15,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:35:15,822 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 48 states. [2018-09-30 23:35:16,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:16,914 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2018-09-30 23:35:16,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 23:35:16,914 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 172 [2018-09-30 23:35:16,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:16,915 INFO L225 Difference]: With dead ends: 181 [2018-09-30 23:35:16,915 INFO L226 Difference]: Without dead ends: 179 [2018-09-30 23:35:16,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3062, Invalid=5128, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 23:35:16,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-30 23:35:16,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2018-09-30 23:35:16,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-30 23:35:16,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2018-09-30 23:35:16,960 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 172 [2018-09-30 23:35:16,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:16,961 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2018-09-30 23:35:16,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 23:35:16,961 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2018-09-30 23:35:16,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-30 23:35:16,962 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:16,962 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1, 1, 1] [2018-09-30 23:35:16,962 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:16,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:16,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1893962597, now seen corresponding path program 83 times [2018-09-30 23:35:16,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:16,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:16,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:16,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:16,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:19,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 1806 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:19,503 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:35:19,503 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:35:19,511 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:35:19,676 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-30 23:35:19,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:19,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:19,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 1806 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:19,741 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:35:19,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-30 23:35:19,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 23:35:19,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 23:35:19,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1979, Invalid=5677, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 23:35:19,742 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand 88 states. [2018-09-30 23:35:21,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:21,960 INFO L93 Difference]: Finished difference Result 266 states and 268 transitions. [2018-09-30 23:35:21,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 23:35:21,960 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-09-30 23:35:21,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:21,961 INFO L225 Difference]: With dead ends: 266 [2018-09-30 23:35:21,961 INFO L226 Difference]: Without dead ends: 177 [2018-09-30 23:35:21,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2667 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3957, Invalid=13073, Unknown=0, NotChecked=0, Total=17030 [2018-09-30 23:35:21,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-30 23:35:22,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-09-30 23:35:22,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-30 23:35:22,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2018-09-30 23:35:22,003 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 174 [2018-09-30 23:35:22,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:22,004 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2018-09-30 23:35:22,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 23:35:22,004 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2018-09-30 23:35:22,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-30 23:35:22,005 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:22,005 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 42, 1, 1, 1, 1] [2018-09-30 23:35:22,005 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:22,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:22,006 INFO L82 PathProgramCache]: Analyzing trace with hash -619306849, now seen corresponding path program 84 times [2018-09-30 23:35:22,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:22,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:22,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:22,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:22,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:22,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:22,879 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:35:22,879 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:35:22,886 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:35:23,057 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-09-30 23:35:23,057 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:23,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:23,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:23,172 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:35:23,173 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2018-09-30 23:35:23,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 23:35:23,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 23:35:23,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=1266, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:35:23,174 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 49 states. [2018-09-30 23:35:24,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:24,415 INFO L93 Difference]: Finished difference Result 185 states and 186 transitions. [2018-09-30 23:35:24,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 23:35:24,415 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 176 [2018-09-30 23:35:24,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:24,416 INFO L225 Difference]: With dead ends: 185 [2018-09-30 23:35:24,416 INFO L226 Difference]: Without dead ends: 183 [2018-09-30 23:35:24,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1980 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3199, Invalid=5357, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 23:35:24,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-30 23:35:24,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2018-09-30 23:35:24,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-30 23:35:24,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2018-09-30 23:35:24,459 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 176 [2018-09-30 23:35:24,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:24,460 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2018-09-30 23:35:24,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 23:35:24,460 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2018-09-30 23:35:24,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-30 23:35:24,461 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:24,461 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1] [2018-09-30 23:35:24,461 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:24,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:24,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1846505499, now seen corresponding path program 85 times [2018-09-30 23:35:24,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:24,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:24,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:24,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:24,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:24,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:26,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:26,652 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:35:26,652 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:35:26,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:35:26,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:26,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:26,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:26,825 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:35:26,826 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-30 23:35:26,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 23:35:26,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 23:35:26,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:35:26,827 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 90 states. [2018-09-30 23:35:29,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:29,466 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2018-09-30 23:35:29,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 23:35:29,466 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-09-30 23:35:29,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:29,467 INFO L225 Difference]: With dead ends: 272 [2018-09-30 23:35:29,467 INFO L226 Difference]: Without dead ends: 181 [2018-09-30 23:35:29,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2795 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4137, Invalid=13685, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 23:35:29,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-30 23:35:29,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-30 23:35:29,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-30 23:35:29,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2018-09-30 23:35:29,508 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 178 [2018-09-30 23:35:29,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:29,508 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2018-09-30 23:35:29,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 23:35:29,508 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2018-09-30 23:35:29,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-30 23:35:29,509 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:29,509 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 43, 1, 1, 1, 1] [2018-09-30 23:35:29,509 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:29,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:29,509 INFO L82 PathProgramCache]: Analyzing trace with hash 895799381, now seen corresponding path program 86 times [2018-09-30 23:35:29,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:29,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:29,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:29,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:35:29,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:29,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:30,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:30,428 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:35:30,428 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:35:30,435 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:35:30,548 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:35:30,548 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:30,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:30,643 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:35:30,643 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2018-09-30 23:35:30,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 23:35:30,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 23:35:30,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:35:30,644 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand 50 states. [2018-09-30 23:35:31,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:31,829 INFO L93 Difference]: Finished difference Result 189 states and 190 transitions. [2018-09-30 23:35:31,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 23:35:31,829 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 180 [2018-09-30 23:35:31,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:31,830 INFO L225 Difference]: With dead ends: 189 [2018-09-30 23:35:31,830 INFO L226 Difference]: Without dead ends: 187 [2018-09-30 23:35:31,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3339, Invalid=5591, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:35:31,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-30 23:35:31,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2018-09-30 23:35:31,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-30 23:35:31,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2018-09-30 23:35:31,877 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 180 [2018-09-30 23:35:31,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:31,877 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2018-09-30 23:35:31,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 23:35:31,877 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2018-09-30 23:35:31,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-30 23:35:31,878 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:31,878 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 1, 1, 1, 1] [2018-09-30 23:35:31,878 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:31,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:31,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1869679185, now seen corresponding path program 87 times [2018-09-30 23:35:31,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:31,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:31,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:31,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:31,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:34,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1980 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:34,668 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:35:34,668 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:35:34,680 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:35:34,863 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-30 23:35:34,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:34,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:34,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1980 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:34,923 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:35:34,924 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-30 23:35:34,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 23:35:34,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 23:35:34,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2161, Invalid=6211, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:35:34,925 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand 92 states. [2018-09-30 23:35:38,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:38,040 INFO L93 Difference]: Finished difference Result 278 states and 280 transitions. [2018-09-30 23:35:38,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 23:35:38,040 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-09-30 23:35:38,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:38,041 INFO L225 Difference]: With dead ends: 278 [2018-09-30 23:35:38,041 INFO L226 Difference]: Without dead ends: 185 [2018-09-30 23:35:38,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4321, Invalid=14311, Unknown=0, NotChecked=0, Total=18632 [2018-09-30 23:35:38,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-30 23:35:38,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-30 23:35:38,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-30 23:35:38,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2018-09-30 23:35:38,086 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 182 [2018-09-30 23:35:38,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:38,086 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2018-09-30 23:35:38,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 23:35:38,086 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2018-09-30 23:35:38,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-30 23:35:38,087 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:38,087 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 44, 1, 1, 1, 1] [2018-09-30 23:35:38,087 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:38,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:38,088 INFO L82 PathProgramCache]: Analyzing trace with hash -800604789, now seen corresponding path program 88 times [2018-09-30 23:35:38,088 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:38,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:38,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:38,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:38,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:38,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:39,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:39,371 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:35:39,371 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:35:39,378 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:35:39,500 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:35:39,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:39,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:39,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:39,605 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:35:39,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 50 [2018-09-30 23:35:39,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 23:35:39,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 23:35:39,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1181, Invalid=1369, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:35:39,607 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand 51 states. [2018-09-30 23:35:40,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:40,796 INFO L93 Difference]: Finished difference Result 193 states and 194 transitions. [2018-09-30 23:35:40,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 23:35:40,797 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 184 [2018-09-30 23:35:40,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:40,797 INFO L225 Difference]: With dead ends: 193 [2018-09-30 23:35:40,798 INFO L226 Difference]: Without dead ends: 191 [2018-09-30 23:35:40,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2162 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3482, Invalid=5830, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 23:35:40,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-30 23:35:40,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 187. [2018-09-30 23:35:40,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-30 23:35:40,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2018-09-30 23:35:40,859 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 184 [2018-09-30 23:35:40,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:40,859 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2018-09-30 23:35:40,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 23:35:40,859 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2018-09-30 23:35:40,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-30 23:35:40,860 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:40,860 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1] [2018-09-30 23:35:40,860 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:40,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:40,861 INFO L82 PathProgramCache]: Analyzing trace with hash -582123001, now seen corresponding path program 89 times [2018-09-30 23:35:40,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:40,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:40,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:40,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:40,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:40,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:43,280 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:35:43,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:35:43,287 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:35:43,463 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-30 23:35:43,463 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:43,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:43,522 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:35:43,522 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-30 23:35:43,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 23:35:43,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 23:35:43,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2255, Invalid=6487, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 23:35:43,524 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 94 states. [2018-09-30 23:35:45,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:45,693 INFO L93 Difference]: Finished difference Result 284 states and 286 transitions. [2018-09-30 23:35:45,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 23:35:45,694 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-09-30 23:35:45,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:45,694 INFO L225 Difference]: With dead ends: 284 [2018-09-30 23:35:45,694 INFO L226 Difference]: Without dead ends: 189 [2018-09-30 23:35:45,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4509, Invalid=14951, Unknown=0, NotChecked=0, Total=19460 [2018-09-30 23:35:45,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-30 23:35:45,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-30 23:35:45,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-30 23:35:45,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2018-09-30 23:35:45,741 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 186 [2018-09-30 23:35:45,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:45,742 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2018-09-30 23:35:45,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 23:35:45,742 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2018-09-30 23:35:45,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-30 23:35:45,742 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:45,743 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 45, 1, 1, 1, 1] [2018-09-30 23:35:45,743 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:45,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:45,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1060894655, now seen corresponding path program 90 times [2018-09-30 23:35:45,743 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:45,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:45,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:45,744 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:45,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:46,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:46,854 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:35:46,855 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:35:46,863 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:35:47,041 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2018-09-30 23:35:47,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:47,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:47,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:47,142 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:35:47,142 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2018-09-30 23:35:47,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 23:35:47,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 23:35:47,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:35:47,143 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand 52 states. [2018-09-30 23:35:48,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:48,389 INFO L93 Difference]: Finished difference Result 197 states and 198 transitions. [2018-09-30 23:35:48,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 23:35:48,389 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 188 [2018-09-30 23:35:48,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:48,390 INFO L225 Difference]: With dead ends: 197 [2018-09-30 23:35:48,390 INFO L226 Difference]: Without dead ends: 195 [2018-09-30 23:35:48,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3628, Invalid=6074, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 23:35:48,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-30 23:35:48,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 191. [2018-09-30 23:35:48,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-30 23:35:48,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2018-09-30 23:35:48,440 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 188 [2018-09-30 23:35:48,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:48,440 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2018-09-30 23:35:48,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 23:35:48,440 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2018-09-30 23:35:48,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-30 23:35:48,441 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:48,441 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 1, 1, 1, 1] [2018-09-30 23:35:48,441 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:48,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:48,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1612581059, now seen corresponding path program 91 times [2018-09-30 23:35:48,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:48,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:48,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:48,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:48,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:48,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:51,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2162 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:51,265 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:35:51,265 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:35:51,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:35:51,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:51,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2162 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:51,462 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:35:51,462 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-30 23:35:51,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 23:35:51,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 23:35:51,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2351, Invalid=6769, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 23:35:51,463 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand 96 states. [2018-09-30 23:35:55,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:55,114 INFO L93 Difference]: Finished difference Result 290 states and 292 transitions. [2018-09-30 23:35:55,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 23:35:55,114 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-09-30 23:35:55,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:55,115 INFO L225 Difference]: With dead ends: 290 [2018-09-30 23:35:55,115 INFO L226 Difference]: Without dead ends: 193 [2018-09-30 23:35:55,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3197 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4701, Invalid=15605, Unknown=0, NotChecked=0, Total=20306 [2018-09-30 23:35:55,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-30 23:35:55,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-30 23:35:55,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-30 23:35:55,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2018-09-30 23:35:55,164 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 190 [2018-09-30 23:35:55,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:55,164 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2018-09-30 23:35:55,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 23:35:55,165 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2018-09-30 23:35:55,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-30 23:35:55,165 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:55,165 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 46, 1, 1, 1, 1] [2018-09-30 23:35:55,166 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:55,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:55,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1003933815, now seen corresponding path program 92 times [2018-09-30 23:35:55,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:55,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:55,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:55,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:35:55,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:56,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2256 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:56,222 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:35:56,222 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:35:56,229 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:35:56,347 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:35:56,347 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:56,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:56,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2256 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:56,437 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:35:56,437 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2018-09-30 23:35:56,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 23:35:56,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 23:35:56,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1280, Invalid=1476, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:35:56,438 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand 53 states. [2018-09-30 23:35:57,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:57,747 INFO L93 Difference]: Finished difference Result 201 states and 202 transitions. [2018-09-30 23:35:57,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 23:35:57,747 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 192 [2018-09-30 23:35:57,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:57,748 INFO L225 Difference]: With dead ends: 201 [2018-09-30 23:35:57,748 INFO L226 Difference]: Without dead ends: 199 [2018-09-30 23:35:57,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3777, Invalid=6323, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 23:35:57,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-30 23:35:57,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2018-09-30 23:35:57,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-30 23:35:57,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2018-09-30 23:35:57,801 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 192 [2018-09-30 23:35:57,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:57,801 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2018-09-30 23:35:57,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 23:35:57,801 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2018-09-30 23:35:57,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-30 23:35:57,802 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:57,802 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1] [2018-09-30 23:35:57,802 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:57,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:57,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1587312141, now seen corresponding path program 93 times [2018-09-30 23:35:57,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:57,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:57,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:57,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:57,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:00,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:00,835 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:00,835 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:00,841 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:36:01,029 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-30 23:36:01,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:36:01,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:01,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:01,093 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:01,094 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-30 23:36:01,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 23:36:01,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 23:36:01,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2449, Invalid=7057, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:36:01,095 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 98 states. [2018-09-30 23:36:04,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:04,822 INFO L93 Difference]: Finished difference Result 296 states and 298 transitions. [2018-09-30 23:36:04,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 23:36:04,823 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-09-30 23:36:04,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:04,823 INFO L225 Difference]: With dead ends: 296 [2018-09-30 23:36:04,823 INFO L226 Difference]: Without dead ends: 197 [2018-09-30 23:36:04,824 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3337 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4897, Invalid=16273, Unknown=0, NotChecked=0, Total=21170 [2018-09-30 23:36:04,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-30 23:36:04,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-30 23:36:04,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-30 23:36:04,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2018-09-30 23:36:04,874 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 194 [2018-09-30 23:36:04,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:04,874 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2018-09-30 23:36:04,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 23:36:04,875 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2018-09-30 23:36:04,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-30 23:36:04,875 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:04,875 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 48, 47, 1, 1, 1, 1] [2018-09-30 23:36:04,875 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:04,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:04,876 INFO L82 PathProgramCache]: Analyzing trace with hash 410334765, now seen corresponding path program 94 times [2018-09-30 23:36:04,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:04,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:04,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:04,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:04,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:04,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:06,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:06,008 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:06,008 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:06,015 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:36:06,143 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:36:06,144 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:36:06,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:06,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:06,254 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:06,254 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2018-09-30 23:36:06,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 23:36:06,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 23:36:06,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:36:06,255 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand 54 states. [2018-09-30 23:36:07,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:07,578 INFO L93 Difference]: Finished difference Result 205 states and 206 transitions. [2018-09-30 23:36:07,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 23:36:07,578 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 196 [2018-09-30 23:36:07,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:07,579 INFO L225 Difference]: With dead ends: 205 [2018-09-30 23:36:07,579 INFO L226 Difference]: Without dead ends: 203 [2018-09-30 23:36:07,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2450 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3929, Invalid=6577, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 23:36:07,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-30 23:36:07,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2018-09-30 23:36:07,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-30 23:36:07,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2018-09-30 23:36:07,635 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 196 [2018-09-30 23:36:07,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:07,635 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2018-09-30 23:36:07,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 23:36:07,636 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2018-09-30 23:36:07,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-30 23:36:07,636 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:07,637 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 1, 1, 1, 1] [2018-09-30 23:36:07,637 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:07,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:07,637 INFO L82 PathProgramCache]: Analyzing trace with hash -805348823, now seen corresponding path program 95 times [2018-09-30 23:36:07,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:07,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:07,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:07,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:07,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:07,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2352 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:10,526 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:10,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:10,539 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:36:10,731 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-30 23:36:10,731 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:36:10,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2352 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:10,796 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:10,796 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-30 23:36:10,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 23:36:10,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 23:36:10,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2549, Invalid=7351, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 23:36:10,798 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand 100 states. [2018-09-30 23:36:14,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:14,333 INFO L93 Difference]: Finished difference Result 302 states and 304 transitions. [2018-09-30 23:36:14,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 23:36:14,333 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2018-09-30 23:36:14,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:14,334 INFO L225 Difference]: With dead ends: 302 [2018-09-30 23:36:14,334 INFO L226 Difference]: Without dead ends: 201 [2018-09-30 23:36:14,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3480 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5097, Invalid=16955, Unknown=0, NotChecked=0, Total=22052 [2018-09-30 23:36:14,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-30 23:36:14,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-09-30 23:36:14,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-30 23:36:14,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2018-09-30 23:36:14,388 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 198 [2018-09-30 23:36:14,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:14,388 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2018-09-30 23:36:14,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 23:36:14,389 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2018-09-30 23:36:14,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-30 23:36:14,389 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:14,389 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 49, 48, 1, 1, 1, 1] [2018-09-30 23:36:14,389 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:14,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:14,390 INFO L82 PathProgramCache]: Analyzing trace with hash -779331229, now seen corresponding path program 96 times [2018-09-30 23:36:14,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:14,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:14,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:14,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:14,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:15,774 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:15,774 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:15,781 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:36:15,974 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-09-30 23:36:15,974 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:36:15,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:16,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:16,106 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:16,106 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 54 [2018-09-30 23:36:16,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 23:36:16,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 23:36:16,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1383, Invalid=1587, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:36:16,107 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand 55 states. [2018-09-30 23:36:17,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:17,428 INFO L93 Difference]: Finished difference Result 209 states and 210 transitions. [2018-09-30 23:36:17,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 23:36:17,428 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 200 [2018-09-30 23:36:17,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:17,429 INFO L225 Difference]: With dead ends: 209 [2018-09-30 23:36:17,429 INFO L226 Difference]: Without dead ends: 207 [2018-09-30 23:36:17,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2550 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4084, Invalid=6836, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 23:36:17,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-30 23:36:17,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 203. [2018-09-30 23:36:17,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-30 23:36:17,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2018-09-30 23:36:17,485 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 200 [2018-09-30 23:36:17,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:17,485 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2018-09-30 23:36:17,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 23:36:17,485 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2018-09-30 23:36:17,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-30 23:36:17,486 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:17,486 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1, 1, 1] [2018-09-30 23:36:17,486 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:17,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:17,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1613068321, now seen corresponding path program 97 times [2018-09-30 23:36:17,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:17,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:17,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:17,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:17,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:20,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2450 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:20,488 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:20,488 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:20,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:36:20,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:20,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:20,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2450 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:20,680 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:20,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-30 23:36:20,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 23:36:20,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 23:36:20,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2651, Invalid=7651, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 23:36:20,682 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand 102 states. [2018-09-30 23:36:24,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:24,379 INFO L93 Difference]: Finished difference Result 308 states and 310 transitions. [2018-09-30 23:36:24,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 23:36:24,379 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 202 [2018-09-30 23:36:24,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:24,380 INFO L225 Difference]: With dead ends: 308 [2018-09-30 23:36:24,380 INFO L226 Difference]: Without dead ends: 205 [2018-09-30 23:36:24,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5301, Invalid=17651, Unknown=0, NotChecked=0, Total=22952 [2018-09-30 23:36:24,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-30 23:36:24,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-30 23:36:24,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-30 23:36:24,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2018-09-30 23:36:24,433 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 202 [2018-09-30 23:36:24,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:24,433 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2018-09-30 23:36:24,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 23:36:24,434 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2018-09-30 23:36:24,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-09-30 23:36:24,434 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:24,434 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 50, 49, 1, 1, 1, 1] [2018-09-30 23:36:24,434 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:24,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:24,435 INFO L82 PathProgramCache]: Analyzing trace with hash 134306329, now seen corresponding path program 98 times [2018-09-30 23:36:24,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:24,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:24,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:24,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:36:24,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 2550 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:25,717 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:25,718 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:25,725 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:36:25,849 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:36:25,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:36:25,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:25,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 2550 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:25,986 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:25,986 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 55 [2018-09-30 23:36:25,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 23:36:25,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 23:36:25,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1436, Invalid=1644, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:36:25,987 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand 56 states. [2018-09-30 23:36:27,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:27,381 INFO L93 Difference]: Finished difference Result 213 states and 214 transitions. [2018-09-30 23:36:27,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-30 23:36:27,381 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 204 [2018-09-30 23:36:27,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:27,382 INFO L225 Difference]: With dead ends: 213 [2018-09-30 23:36:27,382 INFO L226 Difference]: Without dead ends: 211 [2018-09-30 23:36:27,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2652 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4242, Invalid=7100, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 23:36:27,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-30 23:36:27,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 207. [2018-09-30 23:36:27,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-09-30 23:36:27,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2018-09-30 23:36:27,440 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 204 [2018-09-30 23:36:27,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:27,440 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2018-09-30 23:36:27,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 23:36:27,441 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2018-09-30 23:36:27,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-30 23:36:27,441 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:27,441 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 1, 1, 1, 1] [2018-09-30 23:36:27,441 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:27,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:27,442 INFO L82 PathProgramCache]: Analyzing trace with hash 219296533, now seen corresponding path program 99 times [2018-09-30 23:36:27,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:27,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:27,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:27,442 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:27,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2550 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:30,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:30,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:30,655 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:36:30,859 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-30 23:36:30,859 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:36:30,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:30,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2550 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:30,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:30,925 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-30 23:36:30,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 23:36:30,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 23:36:30,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2755, Invalid=7957, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 23:36:30,927 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand 104 states. [2018-09-30 23:36:34,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:34,841 INFO L93 Difference]: Finished difference Result 314 states and 316 transitions. [2018-09-30 23:36:34,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 23:36:34,842 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 206 [2018-09-30 23:36:34,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:34,843 INFO L225 Difference]: With dead ends: 314 [2018-09-30 23:36:34,843 INFO L226 Difference]: Without dead ends: 209 [2018-09-30 23:36:34,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3775 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5509, Invalid=18361, Unknown=0, NotChecked=0, Total=23870 [2018-09-30 23:36:34,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-30 23:36:34,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-09-30 23:36:34,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-30 23:36:34,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 210 transitions. [2018-09-30 23:36:34,904 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 210 transitions. Word has length 206 [2018-09-30 23:36:34,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:34,904 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 210 transitions. [2018-09-30 23:36:34,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 23:36:34,904 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 210 transitions. [2018-09-30 23:36:34,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-30 23:36:34,905 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:34,905 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 51, 50, 1, 1, 1, 1] [2018-09-30 23:36:34,905 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:34,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:34,905 INFO L82 PathProgramCache]: Analyzing trace with hash -2068752305, now seen corresponding path program 100 times [2018-09-30 23:36:34,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:34,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:34,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:34,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:34,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:34,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 2652 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:36,254 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:36,254 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:36,261 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:36:36,405 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:36:36,406 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:36:36,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:36,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 2652 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:36,700 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:36,700 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 56 [2018-09-30 23:36:36,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 23:36:36,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 23:36:36,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1490, Invalid=1702, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:36:36,701 INFO L87 Difference]: Start difference. First operand 209 states and 210 transitions. Second operand 57 states. [2018-09-30 23:36:38,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:38,141 INFO L93 Difference]: Finished difference Result 217 states and 218 transitions. [2018-09-30 23:36:38,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 23:36:38,141 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 208 [2018-09-30 23:36:38,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:38,142 INFO L225 Difference]: With dead ends: 217 [2018-09-30 23:36:38,142 INFO L226 Difference]: Without dead ends: 215 [2018-09-30 23:36:38,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2756 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4403, Invalid=7369, Unknown=0, NotChecked=0, Total=11772 [2018-09-30 23:36:38,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-09-30 23:36:38,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 211. [2018-09-30 23:36:38,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-30 23:36:38,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 212 transitions. [2018-09-30 23:36:38,203 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 212 transitions. Word has length 208 [2018-09-30 23:36:38,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:38,204 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 212 transitions. [2018-09-30 23:36:38,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 23:36:38,204 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 212 transitions. [2018-09-30 23:36:38,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-30 23:36:38,205 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:38,205 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 1, 1, 1, 1] [2018-09-30 23:36:38,205 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:38,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:38,205 INFO L82 PathProgramCache]: Analyzing trace with hash 498826187, now seen corresponding path program 101 times [2018-09-30 23:36:38,206 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:38,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:38,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:38,206 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:38,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:38,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 2652 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:41,635 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:41,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:41,642 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:36:41,855 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-30 23:36:41,856 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:36:41,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:41,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 2652 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:41,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:41,929 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-30 23:36:41,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 23:36:41,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 23:36:41,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2861, Invalid=8269, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 23:36:41,930 INFO L87 Difference]: Start difference. First operand 211 states and 212 transitions. Second operand 106 states. [2018-09-30 23:36:46,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:46,143 INFO L93 Difference]: Finished difference Result 320 states and 322 transitions. [2018-09-30 23:36:46,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-30 23:36:46,143 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 210 [2018-09-30 23:36:46,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:46,144 INFO L225 Difference]: With dead ends: 320 [2018-09-30 23:36:46,144 INFO L226 Difference]: Without dead ends: 213 [2018-09-30 23:36:46,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3927 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5721, Invalid=19085, Unknown=0, NotChecked=0, Total=24806 [2018-09-30 23:36:46,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-09-30 23:36:46,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-09-30 23:36:46,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-09-30 23:36:46,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 214 transitions. [2018-09-30 23:36:46,211 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 214 transitions. Word has length 210 [2018-09-30 23:36:46,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:46,211 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 214 transitions. [2018-09-30 23:36:46,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 23:36:46,211 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 214 transitions. [2018-09-30 23:36:46,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-30 23:36:46,212 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:46,212 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 52, 51, 1, 1, 1, 1] [2018-09-30 23:36:46,212 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:46,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:46,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1166969851, now seen corresponding path program 102 times [2018-09-30 23:36:46,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:46,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:46,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:46,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:46,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5408 backedges. 2756 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:47,506 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:47,506 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:47,514 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:36:47,726 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 53 check-sat command(s) [2018-09-30 23:36:47,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:36:47,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:47,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5408 backedges. 2756 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:47,840 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:47,841 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55] total 57 [2018-09-30 23:36:47,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 23:36:47,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 23:36:47,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1545, Invalid=1761, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:36:47,842 INFO L87 Difference]: Start difference. First operand 213 states and 214 transitions. Second operand 58 states. [2018-09-30 23:36:49,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:49,348 INFO L93 Difference]: Finished difference Result 221 states and 222 transitions. [2018-09-30 23:36:49,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-30 23:36:49,348 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 212 [2018-09-30 23:36:49,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:49,349 INFO L225 Difference]: With dead ends: 221 [2018-09-30 23:36:49,349 INFO L226 Difference]: Without dead ends: 219 [2018-09-30 23:36:49,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2862 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4567, Invalid=7643, Unknown=0, NotChecked=0, Total=12210 [2018-09-30 23:36:49,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-30 23:36:49,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 215. [2018-09-30 23:36:49,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-30 23:36:49,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 216 transitions. [2018-09-30 23:36:49,411 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 216 transitions. Word has length 212 [2018-09-30 23:36:49,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:49,411 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 216 transitions. [2018-09-30 23:36:49,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 23:36:49,412 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 216 transitions. [2018-09-30 23:36:49,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-09-30 23:36:49,412 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:49,412 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 52, 1, 1, 1, 1] [2018-09-30 23:36:49,413 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:49,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:49,413 INFO L82 PathProgramCache]: Analyzing trace with hash -471629311, now seen corresponding path program 103 times [2018-09-30 23:36:49,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:49,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:49,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:49,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:49,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:49,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:52,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5512 backedges. 2756 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:52,872 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:52,872 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:52,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:36:53,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:53,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:53,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5512 backedges. 2756 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:53,085 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:53,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-30 23:36:53,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 23:36:53,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 23:36:53,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2969, Invalid=8587, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 23:36:53,087 INFO L87 Difference]: Start difference. First operand 215 states and 216 transitions. Second operand 108 states. [2018-09-30 23:36:57,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:57,454 INFO L93 Difference]: Finished difference Result 326 states and 328 transitions. [2018-09-30 23:36:57,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-30 23:36:57,454 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 214 [2018-09-30 23:36:57,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:57,455 INFO L225 Difference]: With dead ends: 326 [2018-09-30 23:36:57,455 INFO L226 Difference]: Without dead ends: 217 [2018-09-30 23:36:57,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4082 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=5937, Invalid=19823, Unknown=0, NotChecked=0, Total=25760 [2018-09-30 23:36:57,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-09-30 23:36:57,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-09-30 23:36:57,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-09-30 23:36:57,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2018-09-30 23:36:57,518 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 214 [2018-09-30 23:36:57,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:57,519 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2018-09-30 23:36:57,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 23:36:57,519 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2018-09-30 23:36:57,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-09-30 23:36:57,519 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:57,519 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 53, 52, 1, 1, 1, 1] [2018-09-30 23:36:57,520 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:57,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:57,520 INFO L82 PathProgramCache]: Analyzing trace with hash -938554053, now seen corresponding path program 104 times [2018-09-30 23:36:57,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:57,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:57,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:57,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:36:57,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:57,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:58,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5618 backedges. 2862 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:58,872 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:58,872 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:58,878 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:36:59,010 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:36:59,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:36:59,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5618 backedges. 2862 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:59,128 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:59,128 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56] total 58 [2018-09-30 23:36:59,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 23:36:59,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 23:36:59,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=1821, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:36:59,129 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand 59 states. [2018-09-30 23:37:00,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:00,875 INFO L93 Difference]: Finished difference Result 225 states and 226 transitions. [2018-09-30 23:37:00,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-30 23:37:00,875 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 216 [2018-09-30 23:37:00,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:00,876 INFO L225 Difference]: With dead ends: 225 [2018-09-30 23:37:00,876 INFO L226 Difference]: Without dead ends: 223 [2018-09-30 23:37:00,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2970 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4734, Invalid=7922, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 23:37:00,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-30 23:37:00,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2018-09-30 23:37:00,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-09-30 23:37:00,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 220 transitions. [2018-09-30 23:37:00,953 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 220 transitions. Word has length 216 [2018-09-30 23:37:00,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:00,953 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 220 transitions. [2018-09-30 23:37:00,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 23:37:00,953 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 220 transitions. [2018-09-30 23:37:00,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-30 23:37:00,954 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:00,954 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 53, 53, 1, 1, 1, 1] [2018-09-30 23:37:00,954 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:00,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:00,955 INFO L82 PathProgramCache]: Analyzing trace with hash -7379529, now seen corresponding path program 105 times [2018-09-30 23:37:00,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:00,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:00,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:00,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:37:00,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:00,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 2862 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:04,206 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:37:04,206 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:37:04,213 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:37:04,439 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-30 23:37:04,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:37:04,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:04,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 2862 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:04,510 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:37:04,511 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-30 23:37:04,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 23:37:04,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 23:37:04,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3079, Invalid=8911, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 23:37:04,512 INFO L87 Difference]: Start difference. First operand 219 states and 220 transitions. Second operand 110 states. [2018-09-30 23:37:08,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:08,951 INFO L93 Difference]: Finished difference Result 332 states and 334 transitions. [2018-09-30 23:37:08,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-30 23:37:08,952 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 218 [2018-09-30 23:37:08,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:08,952 INFO L225 Difference]: With dead ends: 332 [2018-09-30 23:37:08,952 INFO L226 Difference]: Without dead ends: 221 [2018-09-30 23:37:08,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4240 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=6157, Invalid=20575, Unknown=0, NotChecked=0, Total=26732 [2018-09-30 23:37:08,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-30 23:37:09,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-09-30 23:37:09,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-30 23:37:09,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 222 transitions. [2018-09-30 23:37:09,024 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 222 transitions. Word has length 218 [2018-09-30 23:37:09,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:09,025 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 222 transitions. [2018-09-30 23:37:09,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 23:37:09,025 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 222 transitions. [2018-09-30 23:37:09,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-09-30 23:37:09,026 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:09,026 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 54, 53, 1, 1, 1, 1] [2018-09-30 23:37:09,026 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:09,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:09,026 INFO L82 PathProgramCache]: Analyzing trace with hash -95517711, now seen corresponding path program 106 times [2018-09-30 23:37:09,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:09,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:09,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:09,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:37:09,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:09,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:10,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5832 backedges. 2970 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:10,395 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:37:10,395 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:37:10,404 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:37:10,547 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:37:10,548 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:37:10,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:10,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5832 backedges. 2970 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:10,665 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:37:10,666 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57] total 59 [2018-09-30 23:37:10,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 23:37:10,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 23:37:10,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1658, Invalid=1882, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:37:10,667 INFO L87 Difference]: Start difference. First operand 221 states and 222 transitions. Second operand 60 states. [2018-09-30 23:37:12,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:12,339 INFO L93 Difference]: Finished difference Result 229 states and 230 transitions. [2018-09-30 23:37:12,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-30 23:37:12,340 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 220 [2018-09-30 23:37:12,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:12,340 INFO L225 Difference]: With dead ends: 229 [2018-09-30 23:37:12,340 INFO L226 Difference]: Without dead ends: 227 [2018-09-30 23:37:12,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4904, Invalid=8206, Unknown=0, NotChecked=0, Total=13110 [2018-09-30 23:37:12,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-09-30 23:37:12,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 223. [2018-09-30 23:37:12,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-09-30 23:37:12,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 224 transitions. [2018-09-30 23:37:12,403 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 224 transitions. Word has length 220 [2018-09-30 23:37:12,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:12,404 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 224 transitions. [2018-09-30 23:37:12,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 23:37:12,404 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 224 transitions. [2018-09-30 23:37:12,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-30 23:37:12,404 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:12,404 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 54, 54, 1, 1, 1, 1] [2018-09-30 23:37:12,405 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:12,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:12,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1598273811, now seen corresponding path program 107 times [2018-09-30 23:37:12,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:12,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:12,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:12,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:37:12,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:12,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:15,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 2970 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:15,916 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:37:15,916 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:37:15,923 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:37:16,161 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-30 23:37:16,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:37:16,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:16,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 2970 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:16,233 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:37:16,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-30 23:37:16,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-30 23:37:16,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-30 23:37:16,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3191, Invalid=9241, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 23:37:16,235 INFO L87 Difference]: Start difference. First operand 223 states and 224 transitions. Second operand 112 states. [2018-09-30 23:37:19,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:19,022 INFO L93 Difference]: Finished difference Result 338 states and 340 transitions. [2018-09-30 23:37:19,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-30 23:37:19,022 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 222 [2018-09-30 23:37:19,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:19,022 INFO L225 Difference]: With dead ends: 338 [2018-09-30 23:37:19,023 INFO L226 Difference]: Without dead ends: 225 [2018-09-30 23:37:19,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4401 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=6381, Invalid=21341, Unknown=0, NotChecked=0, Total=27722 [2018-09-30 23:37:19,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-09-30 23:37:19,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2018-09-30 23:37:19,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-09-30 23:37:19,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2018-09-30 23:37:19,089 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 222 [2018-09-30 23:37:19,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:19,089 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2018-09-30 23:37:19,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-30 23:37:19,089 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2018-09-30 23:37:19,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-09-30 23:37:19,090 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:19,090 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 55, 54, 1, 1, 1, 1] [2018-09-30 23:37:19,090 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:19,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:19,090 INFO L82 PathProgramCache]: Analyzing trace with hash -840058841, now seen corresponding path program 108 times [2018-09-30 23:37:19,090 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:19,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:19,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:19,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:37:19,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:20,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 3080 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:20,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:37:20,467 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:37:20,476 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:37:20,705 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2018-09-30 23:37:20,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:37:20,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:20,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 3080 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:20,824 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:37:20,824 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58] total 60 [2018-09-30 23:37:20,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 23:37:20,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 23:37:20,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1716, Invalid=1944, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:37:20,825 INFO L87 Difference]: Start difference. First operand 225 states and 226 transitions. Second operand 61 states. [2018-09-30 23:37:22,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:22,566 INFO L93 Difference]: Finished difference Result 233 states and 234 transitions. [2018-09-30 23:37:22,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-09-30 23:37:22,567 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 224 [2018-09-30 23:37:22,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:22,567 INFO L225 Difference]: With dead ends: 233 [2018-09-30 23:37:22,567 INFO L226 Difference]: Without dead ends: 231 [2018-09-30 23:37:22,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3192 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5077, Invalid=8495, Unknown=0, NotChecked=0, Total=13572 [2018-09-30 23:37:22,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-09-30 23:37:22,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 227. [2018-09-30 23:37:22,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-09-30 23:37:22,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 228 transitions. [2018-09-30 23:37:22,633 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 228 transitions. Word has length 224 [2018-09-30 23:37:22,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:22,634 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 228 transitions. [2018-09-30 23:37:22,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 23:37:22,634 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 228 transitions. [2018-09-30 23:37:22,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-09-30 23:37:22,634 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:22,634 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 55, 55, 1, 1, 1, 1] [2018-09-30 23:37:22,635 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:22,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:22,635 INFO L82 PathProgramCache]: Analyzing trace with hash 157238691, now seen corresponding path program 109 times [2018-09-30 23:37:22,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:22,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:22,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:22,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:37:22,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:22,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 3080 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:26,454 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:37:26,454 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:37:26,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:37:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:26,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:26,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 3080 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:26,686 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:37:26,687 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 113 [2018-09-30 23:37:26,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 23:37:26,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 23:37:26,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3305, Invalid=9577, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 23:37:26,688 INFO L87 Difference]: Start difference. First operand 227 states and 228 transitions. Second operand 114 states. [2018-09-30 23:37:31,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:31,617 INFO L93 Difference]: Finished difference Result 344 states and 346 transitions. [2018-09-30 23:37:31,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-30 23:37:31,617 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 226 [2018-09-30 23:37:31,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:31,618 INFO L225 Difference]: With dead ends: 344 [2018-09-30 23:37:31,618 INFO L226 Difference]: Without dead ends: 229 [2018-09-30 23:37:31,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4565 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=6609, Invalid=22121, Unknown=0, NotChecked=0, Total=28730 [2018-09-30 23:37:31,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-09-30 23:37:31,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-09-30 23:37:31,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-09-30 23:37:31,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 230 transitions. [2018-09-30 23:37:31,687 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 230 transitions. Word has length 226 [2018-09-30 23:37:31,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:31,687 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 230 transitions. [2018-09-30 23:37:31,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 23:37:31,687 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 230 transitions. [2018-09-30 23:37:31,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-09-30 23:37:31,688 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:31,688 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 56, 55, 1, 1, 1, 1] [2018-09-30 23:37:31,688 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:31,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:31,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1906411997, now seen corresponding path program 110 times [2018-09-30 23:37:31,688 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:31,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:31,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:31,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:37:31,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6272 backedges. 3192 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:33,094 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:37:33,094 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:37:33,102 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:37:33,242 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:37:33,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:37:33,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:33,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6272 backedges. 3192 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:33,362 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:37:33,363 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59] total 61 [2018-09-30 23:37:33,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 23:37:33,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 23:37:33,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1775, Invalid=2007, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:37:33,364 INFO L87 Difference]: Start difference. First operand 229 states and 230 transitions. Second operand 62 states. [2018-09-30 23:37:35,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:35,058 INFO L93 Difference]: Finished difference Result 237 states and 238 transitions. [2018-09-30 23:37:35,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-09-30 23:37:35,058 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 228 [2018-09-30 23:37:35,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:35,059 INFO L225 Difference]: With dead ends: 237 [2018-09-30 23:37:35,059 INFO L226 Difference]: Without dead ends: 235 [2018-09-30 23:37:35,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3306 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5253, Invalid=8789, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 23:37:35,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-09-30 23:37:35,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 231. [2018-09-30 23:37:35,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-09-30 23:37:35,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions. [2018-09-30 23:37:35,125 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 228 [2018-09-30 23:37:35,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:35,125 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 232 transitions. [2018-09-30 23:37:35,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 23:37:35,126 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions. [2018-09-30 23:37:35,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-09-30 23:37:35,126 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:35,126 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 56, 56, 1, 1, 1, 1] [2018-09-30 23:37:35,126 INFO L423 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:35,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:35,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1889173031, now seen corresponding path program 111 times [2018-09-30 23:37:35,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:35,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:35,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:35,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:37:35,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:35,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:39,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 3192 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:39,046 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:37:39,046 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:37:39,052 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:37:39,306 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-09-30 23:37:39,307 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:37:39,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:39,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 3192 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:39,381 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:37:39,382 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 115 [2018-09-30 23:37:39,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-30 23:37:39,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-30 23:37:39,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3421, Invalid=9919, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 23:37:39,383 INFO L87 Difference]: Start difference. First operand 231 states and 232 transitions. Second operand 116 states. [2018-09-30 23:37:44,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:44,420 INFO L93 Difference]: Finished difference Result 350 states and 352 transitions. [2018-09-30 23:37:44,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-09-30 23:37:44,420 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 230 [2018-09-30 23:37:44,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:44,420 INFO L225 Difference]: With dead ends: 350 [2018-09-30 23:37:44,420 INFO L226 Difference]: Without dead ends: 233 [2018-09-30 23:37:44,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4732 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=6841, Invalid=22915, Unknown=0, NotChecked=0, Total=29756 [2018-09-30 23:37:44,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-09-30 23:37:44,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2018-09-30 23:37:44,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-09-30 23:37:44,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 234 transitions. [2018-09-30 23:37:44,489 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 234 transitions. Word has length 230 [2018-09-30 23:37:44,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:44,489 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 234 transitions. [2018-09-30 23:37:44,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-30 23:37:44,489 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 234 transitions. [2018-09-30 23:37:44,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-09-30 23:37:44,490 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:44,490 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 57, 56, 1, 1, 1, 1] [2018-09-30 23:37:44,490 INFO L423 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:44,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:44,490 INFO L82 PathProgramCache]: Analyzing trace with hash -938010349, now seen corresponding path program 112 times [2018-09-30 23:37:44,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:44,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:44,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:44,491 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:37:44,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:44,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:45,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6498 backedges. 3306 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:45,957 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:37:45,958 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:37:45,965 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:37:46,118 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:37:46,118 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:37:46,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:46,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6498 backedges. 3306 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:46,248 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:37:46,248 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60] total 62 [2018-09-30 23:37:46,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 23:37:46,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 23:37:46,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1835, Invalid=2071, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:37:46,250 INFO L87 Difference]: Start difference. First operand 233 states and 234 transitions. Second operand 63 states. [2018-09-30 23:37:48,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:48,169 INFO L93 Difference]: Finished difference Result 241 states and 242 transitions. [2018-09-30 23:37:48,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-30 23:37:48,170 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 232 [2018-09-30 23:37:48,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:48,170 INFO L225 Difference]: With dead ends: 241 [2018-09-30 23:37:48,170 INFO L226 Difference]: Without dead ends: 239 [2018-09-30 23:37:48,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3422 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=5432, Invalid=9088, Unknown=0, NotChecked=0, Total=14520 [2018-09-30 23:37:48,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-09-30 23:37:48,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 235. [2018-09-30 23:37:48,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-09-30 23:37:48,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions. [2018-09-30 23:37:48,246 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 232 [2018-09-30 23:37:48,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:48,246 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 236 transitions. [2018-09-30 23:37:48,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 23:37:48,246 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions. [2018-09-30 23:37:48,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-09-30 23:37:48,247 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:48,247 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 57, 57, 1, 1, 1, 1] [2018-09-30 23:37:48,247 INFO L423 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:48,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:48,247 INFO L82 PathProgramCache]: Analyzing trace with hash 515120015, now seen corresponding path program 113 times [2018-09-30 23:37:48,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:48,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:48,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:48,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:37:48,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:52,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 3306 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:52,337 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:37:52,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:37:52,346 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:37:52,598 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2018-09-30 23:37:52,598 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:37:52,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:52,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 3306 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:52,674 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:37:52,674 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 117 [2018-09-30 23:37:52,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 23:37:52,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 23:37:52,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3539, Invalid=10267, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 23:37:52,676 INFO L87 Difference]: Start difference. First operand 235 states and 236 transitions. Second operand 118 states. [2018-09-30 23:37:57,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:57,916 INFO L93 Difference]: Finished difference Result 356 states and 358 transitions. [2018-09-30 23:37:57,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-09-30 23:37:57,916 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 234 [2018-09-30 23:37:57,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:57,917 INFO L225 Difference]: With dead ends: 356 [2018-09-30 23:37:57,917 INFO L226 Difference]: Without dead ends: 237 [2018-09-30 23:37:57,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4902 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=7077, Invalid=23723, Unknown=0, NotChecked=0, Total=30800 [2018-09-30 23:37:57,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-09-30 23:37:57,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2018-09-30 23:37:57,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-09-30 23:37:57,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 238 transitions. [2018-09-30 23:37:57,985 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 238 transitions. Word has length 234 [2018-09-30 23:37:57,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:57,985 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 238 transitions. [2018-09-30 23:37:57,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 23:37:57,985 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 238 transitions. [2018-09-30 23:37:57,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-09-30 23:37:57,986 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:57,986 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 58, 57, 1, 1, 1, 1] [2018-09-30 23:37:57,986 INFO L423 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:57,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:57,986 INFO L82 PathProgramCache]: Analyzing trace with hash -369916471, now seen corresponding path program 114 times [2018-09-30 23:37:57,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:57,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:57,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:57,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:37:57,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:59,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6728 backedges. 3422 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:59,554 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:37:59,554 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:37:59,561 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:37:59,815 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 59 check-sat command(s) [2018-09-30 23:37:59,815 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:37:59,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:59,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6728 backedges. 3422 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:59,939 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:37:59,939 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61] total 63 [2018-09-30 23:37:59,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 23:37:59,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 23:37:59,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1896, Invalid=2136, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:37:59,940 INFO L87 Difference]: Start difference. First operand 237 states and 238 transitions. Second operand 64 states. [2018-09-30 23:38:01,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:38:01,653 INFO L93 Difference]: Finished difference Result 245 states and 246 transitions. [2018-09-30 23:38:01,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-30 23:38:01,654 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 236 [2018-09-30 23:38:01,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:38:01,654 INFO L225 Difference]: With dead ends: 245 [2018-09-30 23:38:01,655 INFO L226 Difference]: Without dead ends: 243 [2018-09-30 23:38:01,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3540 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5614, Invalid=9392, Unknown=0, NotChecked=0, Total=15006 [2018-09-30 23:38:01,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-30 23:38:01,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 239. [2018-09-30 23:38:01,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-09-30 23:38:01,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 240 transitions. [2018-09-30 23:38:01,724 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 240 transitions. Word has length 236 [2018-09-30 23:38:01,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:38:01,724 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 240 transitions. [2018-09-30 23:38:01,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 23:38:01,725 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 240 transitions. [2018-09-30 23:38:01,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-09-30 23:38:01,726 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:38:01,726 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 58, 58, 1, 1, 1, 1] [2018-09-30 23:38:01,726 INFO L423 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:38:01,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:38:01,726 INFO L82 PathProgramCache]: Analyzing trace with hash 992490181, now seen corresponding path program 115 times [2018-09-30 23:38:01,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:38:01,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:38:01,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:01,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:38:01,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:01,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:38:05,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 3422 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:05,727 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:38:05,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:38:05,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:38:05,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:38:05,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:38:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 3422 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:05,952 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:38:05,952 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 119 [2018-09-30 23:38:05,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-30 23:38:05,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-30 23:38:05,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3659, Invalid=10621, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 23:38:05,953 INFO L87 Difference]: Start difference. First operand 239 states and 240 transitions. Second operand 120 states. [2018-09-30 23:38:11,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:38:11,394 INFO L93 Difference]: Finished difference Result 362 states and 364 transitions. [2018-09-30 23:38:11,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-09-30 23:38:11,395 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 238 [2018-09-30 23:38:11,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:38:11,395 INFO L225 Difference]: With dead ends: 362 [2018-09-30 23:38:11,395 INFO L226 Difference]: Without dead ends: 241 [2018-09-30 23:38:11,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5075 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=7317, Invalid=24545, Unknown=0, NotChecked=0, Total=31862 [2018-09-30 23:38:11,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-09-30 23:38:11,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2018-09-30 23:38:11,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-09-30 23:38:11,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2018-09-30 23:38:11,466 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 238 [2018-09-30 23:38:11,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:38:11,466 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2018-09-30 23:38:11,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-30 23:38:11,466 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2018-09-30 23:38:11,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-09-30 23:38:11,467 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:38:11,467 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 59, 58, 1, 1, 1, 1] [2018-09-30 23:38:11,467 INFO L423 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:38:11,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:38:11,467 INFO L82 PathProgramCache]: Analyzing trace with hash 668200959, now seen corresponding path program 116 times [2018-09-30 23:38:11,467 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:38:11,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:38:11,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:11,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:38:11,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:11,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:38:13,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6962 backedges. 3540 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:13,360 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:38:13,360 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:38:13,367 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:38:13,510 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:38:13,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:38:13,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:38:13,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6962 backedges. 3540 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:13,636 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:38:13,637 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62] total 64 [2018-09-30 23:38:13,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 23:38:13,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 23:38:13,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1958, Invalid=2202, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:38:13,637 INFO L87 Difference]: Start difference. First operand 241 states and 242 transitions. Second operand 65 states. [2018-09-30 23:38:15,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:38:15,418 INFO L93 Difference]: Finished difference Result 249 states and 250 transitions. [2018-09-30 23:38:15,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-09-30 23:38:15,419 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 240 [2018-09-30 23:38:15,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:38:15,420 INFO L225 Difference]: With dead ends: 249 [2018-09-30 23:38:15,420 INFO L226 Difference]: Without dead ends: 247 [2018-09-30 23:38:15,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3660 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5799, Invalid=9701, Unknown=0, NotChecked=0, Total=15500 [2018-09-30 23:38:15,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-09-30 23:38:15,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 243. [2018-09-30 23:38:15,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-09-30 23:38:15,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 244 transitions. [2018-09-30 23:38:15,499 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 244 transitions. Word has length 240 [2018-09-30 23:38:15,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:38:15,499 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 244 transitions. [2018-09-30 23:38:15,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 23:38:15,499 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 244 transitions. [2018-09-30 23:38:15,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-09-30 23:38:15,500 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:38:15,500 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 59, 59, 1, 1, 1, 1] [2018-09-30 23:38:15,500 INFO L423 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:38:15,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:38:15,500 INFO L82 PathProgramCache]: Analyzing trace with hash -2104039557, now seen corresponding path program 117 times [2018-09-30 23:38:15,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:38:15,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:38:15,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:15,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:38:15,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:15,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:38:19,765 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 3540 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:19,766 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:38:19,766 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:38:19,773 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:38:20,042 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2018-09-30 23:38:20,042 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:38:20,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:38:20,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 3540 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:20,122 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:38:20,122 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 121 [2018-09-30 23:38:20,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-30 23:38:20,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-30 23:38:20,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3781, Invalid=10981, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 23:38:20,123 INFO L87 Difference]: Start difference. First operand 243 states and 244 transitions. Second operand 122 states. [2018-09-30 23:38:24,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:38:24,659 INFO L93 Difference]: Finished difference Result 368 states and 370 transitions. [2018-09-30 23:38:24,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-09-30 23:38:24,659 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 242 [2018-09-30 23:38:24,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:38:24,660 INFO L225 Difference]: With dead ends: 368 [2018-09-30 23:38:24,660 INFO L226 Difference]: Without dead ends: 245 [2018-09-30 23:38:24,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5251 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=7561, Invalid=25381, Unknown=0, NotChecked=0, Total=32942 [2018-09-30 23:38:24,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-09-30 23:38:24,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2018-09-30 23:38:24,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-09-30 23:38:24,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 246 transitions. [2018-09-30 23:38:24,731 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 246 transitions. Word has length 242 [2018-09-30 23:38:24,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:38:24,732 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 246 transitions. [2018-09-30 23:38:24,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-30 23:38:24,732 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 246 transitions. [2018-09-30 23:38:24,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-09-30 23:38:24,732 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:38:24,732 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 60, 59, 1, 1, 1, 1] [2018-09-30 23:38:24,732 INFO L423 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:38:24,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:38:24,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1941080139, now seen corresponding path program 118 times [2018-09-30 23:38:24,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:38:24,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:38:24,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:24,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:38:24,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:38:26,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7200 backedges. 3660 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:26,312 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:38:26,312 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:38:26,319 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:38:26,480 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:38:26,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:38:26,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:38:26,587 INFO L134 CoverageAnalysis]: Checked inductivity of 7200 backedges. 3660 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:26,608 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:38:26,608 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63] total 65 [2018-09-30 23:38:26,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 23:38:26,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 23:38:26,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2021, Invalid=2269, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:38:26,609 INFO L87 Difference]: Start difference. First operand 245 states and 246 transitions. Second operand 66 states. [2018-09-30 23:38:28,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:38:28,750 INFO L93 Difference]: Finished difference Result 253 states and 254 transitions. [2018-09-30 23:38:28,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-09-30 23:38:28,750 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 244 [2018-09-30 23:38:28,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:38:28,751 INFO L225 Difference]: With dead ends: 253 [2018-09-30 23:38:28,751 INFO L226 Difference]: Without dead ends: 251 [2018-09-30 23:38:28,752 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3782 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5987, Invalid=10015, Unknown=0, NotChecked=0, Total=16002 [2018-09-30 23:38:28,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-09-30 23:38:28,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 247. [2018-09-30 23:38:28,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-09-30 23:38:28,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 248 transitions. [2018-09-30 23:38:28,831 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 248 transitions. Word has length 244 [2018-09-30 23:38:28,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:38:28,831 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 248 transitions. [2018-09-30 23:38:28,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 23:38:28,831 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 248 transitions. [2018-09-30 23:38:28,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-09-30 23:38:28,832 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:38:28,832 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 60, 60, 1, 1, 1, 1] [2018-09-30 23:38:28,832 INFO L423 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:38:28,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:38:28,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1362273871, now seen corresponding path program 119 times [2018-09-30 23:38:28,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:38:28,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:38:28,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:28,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:38:28,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:28,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:38:33,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 3660 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:33,195 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:38:33,195 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:38:33,203 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:38:33,495 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-09-30 23:38:33,495 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:38:33,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:38:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 3660 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:33,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:38:33,575 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 123 [2018-09-30 23:38:33,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-30 23:38:33,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-30 23:38:33,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3905, Invalid=11347, Unknown=0, NotChecked=0, Total=15252 [2018-09-30 23:38:33,576 INFO L87 Difference]: Start difference. First operand 247 states and 248 transitions. Second operand 124 states. [2018-09-30 23:38:38,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:38:38,357 INFO L93 Difference]: Finished difference Result 374 states and 376 transitions. [2018-09-30 23:38:38,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-09-30 23:38:38,357 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 246 [2018-09-30 23:38:38,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:38:38,358 INFO L225 Difference]: With dead ends: 374 [2018-09-30 23:38:38,358 INFO L226 Difference]: Without dead ends: 249 [2018-09-30 23:38:38,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5430 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=7809, Invalid=26231, Unknown=0, NotChecked=0, Total=34040 [2018-09-30 23:38:38,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-09-30 23:38:38,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2018-09-30 23:38:38,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-09-30 23:38:38,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 250 transitions. [2018-09-30 23:38:38,441 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 250 transitions. Word has length 246 [2018-09-30 23:38:38,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:38:38,441 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 250 transitions. [2018-09-30 23:38:38,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-30 23:38:38,441 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 250 transitions. [2018-09-30 23:38:38,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-09-30 23:38:38,442 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:38:38,442 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 61, 60, 1, 1, 1, 1] [2018-09-30 23:38:38,442 INFO L423 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:38:38,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:38:38,443 INFO L82 PathProgramCache]: Analyzing trace with hash -571654933, now seen corresponding path program 120 times [2018-09-30 23:38:38,443 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:38:38,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:38:38,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:38,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:38:38,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:38,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:38:40,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7442 backedges. 3782 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:40,112 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:38:40,112 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:38:40,120 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:38:40,394 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2018-09-30 23:38:40,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:38:40,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:38:40,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7442 backedges. 3782 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:40,524 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:38:40,524 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64] total 66 [2018-09-30 23:38:40,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 23:38:40,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 23:38:40,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2085, Invalid=2337, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:38:40,525 INFO L87 Difference]: Start difference. First operand 249 states and 250 transitions. Second operand 67 states. [2018-09-30 23:38:42,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:38:42,508 INFO L93 Difference]: Finished difference Result 257 states and 258 transitions. [2018-09-30 23:38:42,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-09-30 23:38:42,508 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 248 [2018-09-30 23:38:42,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:38:42,509 INFO L225 Difference]: With dead ends: 257 [2018-09-30 23:38:42,509 INFO L226 Difference]: Without dead ends: 255 [2018-09-30 23:38:42,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3906 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=6178, Invalid=10334, Unknown=0, NotChecked=0, Total=16512 [2018-09-30 23:38:42,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-09-30 23:38:42,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 251. [2018-09-30 23:38:42,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-09-30 23:38:42,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 252 transitions. [2018-09-30 23:38:42,594 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 252 transitions. Word has length 248 [2018-09-30 23:38:42,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:38:42,594 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 252 transitions. [2018-09-30 23:38:42,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 23:38:42,594 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 252 transitions. [2018-09-30 23:38:42,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-09-30 23:38:42,595 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:38:42,595 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 61, 61, 1, 1, 1, 1] [2018-09-30 23:38:42,595 INFO L423 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:38:42,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:38:42,596 INFO L82 PathProgramCache]: Analyzing trace with hash 395356519, now seen corresponding path program 121 times [2018-09-30 23:38:42,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:38:42,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:38:42,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:42,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:38:42,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:38:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 3782 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:47,066 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:38:47,066 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:38:47,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:38:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:38:47,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:38:47,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 3782 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:47,321 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:38:47,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125] total 125 [2018-09-30 23:38:47,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-30 23:38:47,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-30 23:38:47,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4031, Invalid=11719, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 23:38:47,323 INFO L87 Difference]: Start difference. First operand 251 states and 252 transitions. Second operand 126 states. [2018-09-30 23:38:53,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:38:53,556 INFO L93 Difference]: Finished difference Result 380 states and 382 transitions. [2018-09-30 23:38:53,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-09-30 23:38:53,556 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 250 [2018-09-30 23:38:53,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:38:53,557 INFO L225 Difference]: With dead ends: 380 [2018-09-30 23:38:53,557 INFO L226 Difference]: Without dead ends: 253 [2018-09-30 23:38:53,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5612 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=8061, Invalid=27095, Unknown=0, NotChecked=0, Total=35156 [2018-09-30 23:38:53,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-09-30 23:38:53,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2018-09-30 23:38:53,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-09-30 23:38:53,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 254 transitions. [2018-09-30 23:38:53,638 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 254 transitions. Word has length 250 [2018-09-30 23:38:53,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:38:53,638 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 254 transitions. [2018-09-30 23:38:53,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-30 23:38:53,638 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 254 transitions. [2018-09-30 23:38:53,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-09-30 23:38:53,639 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:38:53,639 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 62, 61, 1, 1, 1, 1] [2018-09-30 23:38:53,639 INFO L423 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:38:53,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:38:53,640 INFO L82 PathProgramCache]: Analyzing trace with hash 557342625, now seen corresponding path program 122 times [2018-09-30 23:38:53,640 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:38:53,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:38:53,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:53,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:38:53,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:53,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:38:55,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7688 backedges. 3906 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:55,374 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:38:55,374 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:38:55,381 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:38:55,535 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:38:55,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:38:55,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:38:55,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7688 backedges. 3906 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:55,663 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:38:55,663 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65] total 67 [2018-09-30 23:38:55,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 23:38:55,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 23:38:55,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2150, Invalid=2406, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:38:55,664 INFO L87 Difference]: Start difference. First operand 253 states and 254 transitions. Second operand 68 states. [2018-09-30 23:38:57,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:38:57,684 INFO L93 Difference]: Finished difference Result 261 states and 262 transitions. [2018-09-30 23:38:57,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-09-30 23:38:57,685 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 252 [2018-09-30 23:38:57,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:38:57,685 INFO L225 Difference]: With dead ends: 261 [2018-09-30 23:38:57,685 INFO L226 Difference]: Without dead ends: 259 [2018-09-30 23:38:57,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4032 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=6372, Invalid=10658, Unknown=0, NotChecked=0, Total=17030 [2018-09-30 23:38:57,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-09-30 23:38:57,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 255. [2018-09-30 23:38:57,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-09-30 23:38:57,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 256 transitions. [2018-09-30 23:38:57,766 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 256 transitions. Word has length 252 [2018-09-30 23:38:57,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:38:57,766 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 256 transitions. [2018-09-30 23:38:57,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 23:38:57,766 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 256 transitions. [2018-09-30 23:38:57,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-09-30 23:38:57,766 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:38:57,767 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 62, 62, 1, 1, 1, 1] [2018-09-30 23:38:57,767 INFO L423 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:38:57,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:38:57,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1264716131, now seen corresponding path program 123 times [2018-09-30 23:38:57,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:38:57,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:38:57,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:57,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:38:57,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:39:02,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 3906 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:02,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:39:02,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:39:02,353 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:39:02,660 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2018-09-30 23:39:02,660 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:39:02,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:39:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 3906 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:02,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:39:02,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127] total 127 [2018-09-30 23:39:02,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-30 23:39:02,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-30 23:39:02,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4159, Invalid=12097, Unknown=0, NotChecked=0, Total=16256 [2018-09-30 23:39:02,744 INFO L87 Difference]: Start difference. First operand 255 states and 256 transitions. Second operand 128 states. [2018-09-30 23:39:09,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:39:09,220 INFO L93 Difference]: Finished difference Result 386 states and 388 transitions. [2018-09-30 23:39:09,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-09-30 23:39:09,221 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 254 [2018-09-30 23:39:09,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:39:09,221 INFO L225 Difference]: With dead ends: 386 [2018-09-30 23:39:09,221 INFO L226 Difference]: Without dead ends: 257 [2018-09-30 23:39:09,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5797 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=8317, Invalid=27973, Unknown=0, NotChecked=0, Total=36290 [2018-09-30 23:39:09,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-09-30 23:39:09,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2018-09-30 23:39:09,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2018-09-30 23:39:09,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 258 transitions. [2018-09-30 23:39:09,306 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 258 transitions. Word has length 254 [2018-09-30 23:39:09,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:39:09,306 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 258 transitions. [2018-09-30 23:39:09,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-30 23:39:09,306 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 258 transitions. [2018-09-30 23:39:09,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-09-30 23:39:09,307 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:39:09,307 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 63, 62, 1, 1, 1, 1] [2018-09-30 23:39:09,307 INFO L423 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:39:09,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:39:09,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1700003881, now seen corresponding path program 124 times [2018-09-30 23:39:09,308 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:39:09,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:39:09,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:09,308 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:39:09,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:09,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:39:11,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7938 backedges. 4032 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:11,114 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:39:11,114 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:39:11,121 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:39:11,290 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:39:11,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:39:11,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:39:11,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7938 backedges. 4032 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:11,425 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:39:11,425 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66] total 68 [2018-09-30 23:39:11,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 23:39:11,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 23:39:11,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2216, Invalid=2476, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:39:11,427 INFO L87 Difference]: Start difference. First operand 257 states and 258 transitions. Second operand 69 states. [2018-09-30 23:39:13,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:39:13,425 INFO L93 Difference]: Finished difference Result 265 states and 266 transitions. [2018-09-30 23:39:13,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-30 23:39:13,425 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 256 [2018-09-30 23:39:13,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:39:13,426 INFO L225 Difference]: With dead ends: 265 [2018-09-30 23:39:13,426 INFO L226 Difference]: Without dead ends: 263 [2018-09-30 23:39:13,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4160 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6569, Invalid=10987, Unknown=0, NotChecked=0, Total=17556 [2018-09-30 23:39:13,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-09-30 23:39:13,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 259. [2018-09-30 23:39:13,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-09-30 23:39:13,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 260 transitions. [2018-09-30 23:39:13,515 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 260 transitions. Word has length 256 [2018-09-30 23:39:13,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:39:13,515 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 260 transitions. [2018-09-30 23:39:13,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 23:39:13,515 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 260 transitions. [2018-09-30 23:39:13,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-09-30 23:39:13,516 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:39:13,516 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 63, 63, 1, 1, 1, 1] [2018-09-30 23:39:13,516 INFO L423 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:39:13,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:39:13,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1616223917, now seen corresponding path program 125 times [2018-09-30 23:39:13,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:39:13,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:39:13,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:13,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:39:13,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:39:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 4032 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:18,231 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:39:18,231 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:39:18,240 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:39:18,542 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2018-09-30 23:39:18,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:39:18,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:39:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 4032 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:18,628 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:39:18,628 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129] total 129 [2018-09-30 23:39:18,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-30 23:39:18,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-30 23:39:18,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4289, Invalid=12481, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 23:39:18,630 INFO L87 Difference]: Start difference. First operand 259 states and 260 transitions. Second operand 130 states. [2018-09-30 23:39:25,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:39:25,097 INFO L93 Difference]: Finished difference Result 392 states and 394 transitions. [2018-09-30 23:39:25,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-09-30 23:39:25,097 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 258 [2018-09-30 23:39:25,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:39:25,097 INFO L225 Difference]: With dead ends: 392 [2018-09-30 23:39:25,097 INFO L226 Difference]: Without dead ends: 261 [2018-09-30 23:39:25,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5985 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=8577, Invalid=28865, Unknown=0, NotChecked=0, Total=37442 [2018-09-30 23:39:25,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-09-30 23:39:25,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2018-09-30 23:39:25,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-09-30 23:39:25,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 262 transitions. [2018-09-30 23:39:25,183 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 262 transitions. Word has length 258 [2018-09-30 23:39:25,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:39:25,183 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 262 transitions. [2018-09-30 23:39:25,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-30 23:39:25,183 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 262 transitions. [2018-09-30 23:39:25,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-09-30 23:39:25,184 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:39:25,184 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 64, 63, 1, 1, 1, 1] [2018-09-30 23:39:25,184 INFO L423 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:39:25,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:39:25,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1354579341, now seen corresponding path program 126 times [2018-09-30 23:39:25,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:39:25,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:39:25,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:25,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:39:25,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:25,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:39:27,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8192 backedges. 4160 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:27,058 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:39:27,058 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:39:27,067 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:39:27,411 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 65 check-sat command(s) [2018-09-30 23:39:27,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:39:27,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:39:27,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8192 backedges. 4160 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:27,627 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:39:27,627 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 70 [2018-09-30 23:39:27,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 23:39:27,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 23:39:27,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2353, Invalid=2617, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:39:27,629 INFO L87 Difference]: Start difference. First operand 261 states and 262 transitions. Second operand 71 states. [2018-09-30 23:39:29,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:39:29,885 INFO L93 Difference]: Finished difference Result 269 states and 270 transitions. [2018-09-30 23:39:29,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-09-30 23:39:29,885 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 260 [2018-09-30 23:39:29,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:39:29,886 INFO L225 Difference]: With dead ends: 269 [2018-09-30 23:39:29,886 INFO L226 Difference]: Without dead ends: 267 [2018-09-30 23:39:29,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4291 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=6769, Invalid=11321, Unknown=0, NotChecked=0, Total=18090 [2018-09-30 23:39:29,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-09-30 23:39:29,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 263. [2018-09-30 23:39:29,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-09-30 23:39:29,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 264 transitions. [2018-09-30 23:39:29,973 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 264 transitions. Word has length 260 [2018-09-30 23:39:29,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:39:29,973 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 264 transitions. [2018-09-30 23:39:29,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 23:39:29,973 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 264 transitions. [2018-09-30 23:39:29,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-09-30 23:39:29,974 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:39:29,974 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 64, 64, 1, 1, 1, 1] [2018-09-30 23:39:29,975 INFO L423 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:39:29,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:39:29,975 INFO L82 PathProgramCache]: Analyzing trace with hash 375589257, now seen corresponding path program 127 times [2018-09-30 23:39:29,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:39:29,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:39:29,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:29,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:39:29,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:39:34,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 4160 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:34,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:39:34,952 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:39:34,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:39:35,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:39:35,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:39:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 4160 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:35,199 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:39:35,199 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131] total 131 [2018-09-30 23:39:35,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-30 23:39:35,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-30 23:39:35,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4421, Invalid=12871, Unknown=0, NotChecked=0, Total=17292 [2018-09-30 23:39:35,201 INFO L87 Difference]: Start difference. First operand 263 states and 264 transitions. Second operand 132 states. [2018-09-30 23:39:41,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:39:41,952 INFO L93 Difference]: Finished difference Result 398 states and 400 transitions. [2018-09-30 23:39:41,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-09-30 23:39:41,952 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 262 [2018-09-30 23:39:41,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:39:41,953 INFO L225 Difference]: With dead ends: 398 [2018-09-30 23:39:41,953 INFO L226 Difference]: Without dead ends: 265 [2018-09-30 23:39:41,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6176 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=8841, Invalid=29771, Unknown=0, NotChecked=0, Total=38612 [2018-09-30 23:39:41,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2018-09-30 23:39:42,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2018-09-30 23:39:42,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2018-09-30 23:39:42,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 266 transitions. [2018-09-30 23:39:42,045 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 266 transitions. Word has length 262 [2018-09-30 23:39:42,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:39:42,045 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 266 transitions. [2018-09-30 23:39:42,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-30 23:39:42,046 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 266 transitions. [2018-09-30 23:39:42,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-09-30 23:39:42,047 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:39:42,047 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 65, 64, 1, 1, 1, 1] [2018-09-30 23:39:42,047 INFO L423 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:39:42,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:39:42,047 INFO L82 PathProgramCache]: Analyzing trace with hash 232339651, now seen corresponding path program 128 times [2018-09-30 23:39:42,047 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:39:42,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:39:42,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:42,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:39:42,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:42,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:39:43,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8450 backedges. 4290 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:43,936 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:39:43,936 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:39:43,945 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:39:44,108 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:39:44,109 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:39:44,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:39:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8450 backedges. 4290 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:44,503 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:39:44,504 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 71 [2018-09-30 23:39:44,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 23:39:44,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 23:39:44,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2422, Invalid=2690, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:39:44,505 INFO L87 Difference]: Start difference. First operand 265 states and 266 transitions. Second operand 72 states. [2018-09-30 23:39:46,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:39:46,723 INFO L93 Difference]: Finished difference Result 273 states and 274 transitions. [2018-09-30 23:39:46,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-09-30 23:39:46,723 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 264 [2018-09-30 23:39:46,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:39:46,723 INFO L225 Difference]: With dead ends: 273 [2018-09-30 23:39:46,724 INFO L226 Difference]: Without dead ends: 271 [2018-09-30 23:39:46,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4423 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=6972, Invalid=11660, Unknown=0, NotChecked=0, Total=18632 [2018-09-30 23:39:46,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-09-30 23:39:46,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 267. [2018-09-30 23:39:46,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-09-30 23:39:46,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 268 transitions. [2018-09-30 23:39:46,816 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 268 transitions. Word has length 264 [2018-09-30 23:39:46,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:39:46,817 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 268 transitions. [2018-09-30 23:39:46,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 23:39:46,817 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 268 transitions. [2018-09-30 23:39:46,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-09-30 23:39:46,817 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:39:46,818 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 65, 65, 1, 1, 1, 1] [2018-09-30 23:39:46,818 INFO L423 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:39:46,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:39:46,818 INFO L82 PathProgramCache]: Analyzing trace with hash -59961537, now seen corresponding path program 129 times [2018-09-30 23:39:46,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:39:46,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:39:46,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:46,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:39:46,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:39:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 4290 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:51,862 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:39:51,862 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:39:51,869 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:39:52,183 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2018-09-30 23:39:52,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:39:52,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:39:52,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 4290 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:52,277 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:39:52,277 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133] total 133 [2018-09-30 23:39:52,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-30 23:39:52,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-30 23:39:52,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4555, Invalid=13267, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 23:39:52,279 INFO L87 Difference]: Start difference. First operand 267 states and 268 transitions. Second operand 134 states. [2018-09-30 23:39:57,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:39:57,379 INFO L93 Difference]: Finished difference Result 404 states and 406 transitions. [2018-09-30 23:39:57,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-09-30 23:39:57,379 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 266 [2018-09-30 23:39:57,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:39:57,380 INFO L225 Difference]: With dead ends: 404 [2018-09-30 23:39:57,380 INFO L226 Difference]: Without dead ends: 269 [2018-09-30 23:39:57,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6370 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=9109, Invalid=30691, Unknown=0, NotChecked=0, Total=39800 [2018-09-30 23:39:57,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-09-30 23:39:57,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2018-09-30 23:39:57,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-09-30 23:39:57,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 270 transitions. [2018-09-30 23:39:57,476 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 270 transitions. Word has length 266 [2018-09-30 23:39:57,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:39:57,476 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 270 transitions. [2018-09-30 23:39:57,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-30 23:39:57,476 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 270 transitions. [2018-09-30 23:39:57,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-09-30 23:39:57,477 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:39:57,477 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 66, 65, 1, 1, 1, 1] [2018-09-30 23:39:57,477 INFO L423 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:39:57,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:39:57,477 INFO L82 PathProgramCache]: Analyzing trace with hash -496692871, now seen corresponding path program 130 times [2018-09-30 23:39:57,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:39:57,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:39:57,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:57,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:39:57,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:57,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:39:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8712 backedges. 4422 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:59,434 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:39:59,434 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:39:59,440 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:39:59,623 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:39:59,623 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:39:59,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:40:00,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8712 backedges. 4422 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:40:00,033 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:40:00,033 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 72 [2018-09-30 23:40:00,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 23:40:00,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 23:40:00,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2492, Invalid=2764, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 23:40:00,034 INFO L87 Difference]: Start difference. First operand 269 states and 270 transitions. Second operand 73 states. [2018-09-30 23:40:02,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:40:02,314 INFO L93 Difference]: Finished difference Result 277 states and 278 transitions. [2018-09-30 23:40:02,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-09-30 23:40:02,314 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 268 [2018-09-30 23:40:02,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:40:02,315 INFO L225 Difference]: With dead ends: 277 [2018-09-30 23:40:02,315 INFO L226 Difference]: Without dead ends: 275 [2018-09-30 23:40:02,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4557 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=7178, Invalid=12004, Unknown=0, NotChecked=0, Total=19182 [2018-09-30 23:40:02,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-09-30 23:40:02,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 271. [2018-09-30 23:40:02,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-09-30 23:40:02,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2018-09-30 23:40:02,414 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 268 [2018-09-30 23:40:02,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:40:02,414 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2018-09-30 23:40:02,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 23:40:02,414 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2018-09-30 23:40:02,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-09-30 23:40:02,415 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:40:02,415 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 66, 66, 1, 1, 1, 1] [2018-09-30 23:40:02,416 INFO L423 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:40:02,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:40:02,416 INFO L82 PathProgramCache]: Analyzing trace with hash -580545931, now seen corresponding path program 131 times [2018-09-30 23:40:02,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:40:02,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:40:02,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:02,417 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:40:02,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:02,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:40:07,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 4422 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:40:07,674 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:40:07,674 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:40:07,681 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:40:08,010 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-09-30 23:40:08,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:40:08,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:40:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 4422 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:40:08,125 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:40:08,125 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 135] total 135 [2018-09-30 23:40:08,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-30 23:40:08,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-30 23:40:08,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4691, Invalid=13669, Unknown=0, NotChecked=0, Total=18360 [2018-09-30 23:40:08,127 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand 136 states. [2018-09-30 23:40:15,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:40:15,228 INFO L93 Difference]: Finished difference Result 410 states and 412 transitions. [2018-09-30 23:40:15,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-09-30 23:40:15,229 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 270 [2018-09-30 23:40:15,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:40:15,229 INFO L225 Difference]: With dead ends: 410 [2018-09-30 23:40:15,229 INFO L226 Difference]: Without dead ends: 273 [2018-09-30 23:40:15,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6567 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=9381, Invalid=31625, Unknown=0, NotChecked=0, Total=41006 [2018-09-30 23:40:15,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-09-30 23:40:15,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2018-09-30 23:40:15,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2018-09-30 23:40:15,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 274 transitions. [2018-09-30 23:40:15,319 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 274 transitions. Word has length 270 [2018-09-30 23:40:15,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:40:15,319 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 274 transitions. [2018-09-30 23:40:15,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-30 23:40:15,319 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 274 transitions. [2018-09-30 23:40:15,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-09-30 23:40:15,320 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:40:15,320 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 67, 66, 1, 1, 1, 1] [2018-09-30 23:40:15,320 INFO L423 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:40:15,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:40:15,320 INFO L82 PathProgramCache]: Analyzing trace with hash 649979823, now seen corresponding path program 132 times [2018-09-30 23:40:15,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:40:15,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:40:15,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:15,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:40:15,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:40:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8978 backedges. 4556 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:40:17,439 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:40:17,439 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:40:17,446 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:40:17,766 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2018-09-30 23:40:17,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:40:17,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:40:18,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8978 backedges. 4556 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:40:18,581 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:40:18,582 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 73 [2018-09-30 23:40:18,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 23:40:18,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 23:40:18,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2563, Invalid=2839, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:40:18,583 INFO L87 Difference]: Start difference. First operand 273 states and 274 transitions. Second operand 74 states. [2018-09-30 23:40:21,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:40:21,040 INFO L93 Difference]: Finished difference Result 281 states and 282 transitions. [2018-09-30 23:40:21,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2018-09-30 23:40:21,040 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 272 [2018-09-30 23:40:21,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:40:21,041 INFO L225 Difference]: With dead ends: 281 [2018-09-30 23:40:21,041 INFO L226 Difference]: Without dead ends: 279 [2018-09-30 23:40:21,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4693 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=7387, Invalid=12353, Unknown=0, NotChecked=0, Total=19740 [2018-09-30 23:40:21,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-09-30 23:40:21,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 275. [2018-09-30 23:40:21,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-09-30 23:40:21,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 276 transitions. [2018-09-30 23:40:21,144 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 276 transitions. Word has length 272 [2018-09-30 23:40:21,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:40:21,144 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 276 transitions. [2018-09-30 23:40:21,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 23:40:21,144 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 276 transitions. [2018-09-30 23:40:21,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-09-30 23:40:21,145 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:40:21,145 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 67, 67, 1, 1, 1, 1] [2018-09-30 23:40:21,145 INFO L423 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:40:21,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:40:21,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1860285227, now seen corresponding path program 133 times [2018-09-30 23:40:21,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:40:21,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:40:21,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:21,146 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:40:21,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:21,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:40:26,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 4556 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:40:26,783 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:40:26,783 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:40:26,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:40:26,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:40:26,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:40:27,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 4556 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:40:27,049 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:40:27,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 137] total 137 [2018-09-30 23:40:27,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-30 23:40:27,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-30 23:40:27,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4829, Invalid=14077, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 23:40:27,051 INFO L87 Difference]: Start difference. First operand 275 states and 276 transitions. Second operand 138 states. [2018-09-30 23:40:34,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:40:34,368 INFO L93 Difference]: Finished difference Result 416 states and 418 transitions. [2018-09-30 23:40:34,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-09-30 23:40:34,368 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 274 [2018-09-30 23:40:34,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:40:34,368 INFO L225 Difference]: With dead ends: 416 [2018-09-30 23:40:34,369 INFO L226 Difference]: Without dead ends: 277 [2018-09-30 23:40:34,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6767 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=9657, Invalid=32573, Unknown=0, NotChecked=0, Total=42230 [2018-09-30 23:40:34,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2018-09-30 23:40:34,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2018-09-30 23:40:34,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2018-09-30 23:40:34,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 278 transitions. [2018-09-30 23:40:34,511 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 278 transitions. Word has length 274 [2018-09-30 23:40:34,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:40:34,511 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 278 transitions. [2018-09-30 23:40:34,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-30 23:40:34,512 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 278 transitions. [2018-09-30 23:40:34,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-09-30 23:40:34,513 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:40:34,513 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 68, 67, 1, 1, 1, 1] [2018-09-30 23:40:34,513 INFO L423 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:40:34,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:40:34,514 INFO L82 PathProgramCache]: Analyzing trace with hash -46605467, now seen corresponding path program 134 times [2018-09-30 23:40:34,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:40:34,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:40:34,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:34,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:40:34,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:40:36,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9248 backedges. 4692 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:40:36,896 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:40:36,896 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:40:36,936 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:40:37,117 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:40:37,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:40:37,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:40:37,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9248 backedges. 4692 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:40:37,342 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:40:37,342 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 74 [2018-09-30 23:40:37,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 23:40:37,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 23:40:37,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2635, Invalid=2915, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 23:40:37,343 INFO L87 Difference]: Start difference. First operand 277 states and 278 transitions. Second operand 75 states. [2018-09-30 23:40:39,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:40:39,626 INFO L93 Difference]: Finished difference Result 285 states and 286 transitions. [2018-09-30 23:40:39,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2018-09-30 23:40:39,626 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 276 [2018-09-30 23:40:39,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:40:39,627 INFO L225 Difference]: With dead ends: 285 [2018-09-30 23:40:39,627 INFO L226 Difference]: Without dead ends: 283 [2018-09-30 23:40:39,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4831 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=7599, Invalid=12707, Unknown=0, NotChecked=0, Total=20306 [2018-09-30 23:40:39,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-09-30 23:40:39,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 279. [2018-09-30 23:40:39,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-09-30 23:40:39,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 280 transitions. [2018-09-30 23:40:39,723 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 280 transitions. Word has length 276 [2018-09-30 23:40:39,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:40:39,723 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 280 transitions. [2018-09-30 23:40:39,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 23:40:39,723 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 280 transitions. [2018-09-30 23:40:39,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-09-30 23:40:39,724 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:40:39,724 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 68, 68, 1, 1, 1, 1] [2018-09-30 23:40:39,724 INFO L423 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:40:39,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:40:39,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1838247583, now seen corresponding path program 135 times [2018-09-30 23:40:39,725 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:40:39,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:40:39,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:39,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:40:39,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:39,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:40:45,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 4692 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:40:45,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:40:45,266 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:40:45,273 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:40:45,622 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2018-09-30 23:40:45,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:40:45,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:40:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 4692 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:40:45,786 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:40:45,787 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139] total 139 [2018-09-30 23:40:45,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-30 23:40:45,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-30 23:40:45,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4969, Invalid=14491, Unknown=0, NotChecked=0, Total=19460 [2018-09-30 23:40:45,788 INFO L87 Difference]: Start difference. First operand 279 states and 280 transitions. Second operand 140 states. [2018-09-30 23:40:52,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:40:52,992 INFO L93 Difference]: Finished difference Result 422 states and 424 transitions. [2018-09-30 23:40:52,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-09-30 23:40:52,992 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 278 [2018-09-30 23:40:52,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:40:52,992 INFO L225 Difference]: With dead ends: 422 [2018-09-30 23:40:52,992 INFO L226 Difference]: Without dead ends: 281 [2018-09-30 23:40:52,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6970 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=9937, Invalid=33535, Unknown=0, NotChecked=0, Total=43472 [2018-09-30 23:40:52,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-09-30 23:40:53,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2018-09-30 23:40:53,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2018-09-30 23:40:53,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 282 transitions. [2018-09-30 23:40:53,094 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 282 transitions. Word has length 278 [2018-09-30 23:40:53,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:40:53,095 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 282 transitions. [2018-09-30 23:40:53,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-30 23:40:53,095 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 282 transitions. [2018-09-30 23:40:53,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2018-09-30 23:40:53,095 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:40:53,096 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 69, 68, 1, 1, 1, 1] [2018-09-30 23:40:53,096 INFO L423 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:40:53,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:40:53,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1411583131, now seen corresponding path program 136 times [2018-09-30 23:40:53,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:40:53,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:40:53,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:53,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:40:53,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:53,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:40:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9522 backedges. 4830 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:40:55,183 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:40:55,183 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:40:55,191 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:40:55,380 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:40:55,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:40:55,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:40:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9522 backedges. 4830 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:40:55,681 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:40:55,681 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 75 [2018-09-30 23:40:55,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 23:40:55,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 23:40:55,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2708, Invalid=2992, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:40:55,683 INFO L87 Difference]: Start difference. First operand 281 states and 282 transitions. Second operand 76 states. [2018-09-30 23:40:58,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:40:58,218 INFO L93 Difference]: Finished difference Result 289 states and 290 transitions. [2018-09-30 23:40:58,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-09-30 23:40:58,218 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 280 [2018-09-30 23:40:58,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:40:58,219 INFO L225 Difference]: With dead ends: 289 [2018-09-30 23:40:58,219 INFO L226 Difference]: Without dead ends: 287 [2018-09-30 23:40:58,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4971 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=7814, Invalid=13066, Unknown=0, NotChecked=0, Total=20880 [2018-09-30 23:40:58,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-09-30 23:40:58,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 283. [2018-09-30 23:40:58,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-09-30 23:40:58,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 284 transitions. [2018-09-30 23:40:58,317 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 284 transitions. Word has length 280 [2018-09-30 23:40:58,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:40:58,318 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 284 transitions. [2018-09-30 23:40:58,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 23:40:58,318 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 284 transitions. [2018-09-30 23:40:58,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-09-30 23:40:58,318 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:40:58,319 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 69, 69, 1, 1, 1, 1] [2018-09-30 23:40:58,319 INFO L423 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:40:58,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:40:58,319 INFO L82 PathProgramCache]: Analyzing trace with hash -678343401, now seen corresponding path program 137 times [2018-09-30 23:40:58,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:40:58,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:40:58,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:58,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:40:58,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:58,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:41:04,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9660 backedges. 4830 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:41:04,018 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:41:04,019 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:41:04,025 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:41:04,371 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 70 check-sat command(s) [2018-09-30 23:41:04,371 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:41:04,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:41:04,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9660 backedges. 4830 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:41:04,468 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:41:04,468 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [141, 141] total 141 [2018-09-30 23:41:04,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-30 23:41:04,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-30 23:41:04,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5111, Invalid=14911, Unknown=0, NotChecked=0, Total=20022 [2018-09-30 23:41:04,470 INFO L87 Difference]: Start difference. First operand 283 states and 284 transitions. Second operand 142 states. [2018-09-30 23:41:12,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:41:12,180 INFO L93 Difference]: Finished difference Result 428 states and 430 transitions. [2018-09-30 23:41:12,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-09-30 23:41:12,180 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 282 [2018-09-30 23:41:12,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:41:12,181 INFO L225 Difference]: With dead ends: 428 [2018-09-30 23:41:12,181 INFO L226 Difference]: Without dead ends: 285 [2018-09-30 23:41:12,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7176 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=10221, Invalid=34511, Unknown=0, NotChecked=0, Total=44732 [2018-09-30 23:41:12,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2018-09-30 23:41:12,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2018-09-30 23:41:12,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2018-09-30 23:41:12,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 286 transitions. [2018-09-30 23:41:12,304 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 286 transitions. Word has length 282 [2018-09-30 23:41:12,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:41:12,304 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 286 transitions. [2018-09-30 23:41:12,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-30 23:41:12,304 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 286 transitions. [2018-09-30 23:41:12,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2018-09-30 23:41:12,305 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:41:12,305 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 70, 69, 1, 1, 1, 1] [2018-09-30 23:41:12,305 INFO L423 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:41:12,306 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:41:12,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1740741457, now seen corresponding path program 138 times [2018-09-30 23:41:12,306 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:41:12,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:41:12,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:41:12,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:41:12,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:41:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:41:14,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9800 backedges. 4970 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:41:14,404 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:41:14,404 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:41:14,411 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:41:14,780 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 71 check-sat command(s) [2018-09-30 23:41:14,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:41:14,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:41:14,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9800 backedges. 4970 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:41:15,009 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:41:15,009 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 76 [2018-09-30 23:41:15,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 23:41:15,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 23:41:15,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2782, Invalid=3070, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:41:15,010 INFO L87 Difference]: Start difference. First operand 285 states and 286 transitions. Second operand 77 states. [2018-09-30 23:41:17,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:41:17,719 INFO L93 Difference]: Finished difference Result 293 states and 294 transitions. [2018-09-30 23:41:17,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-09-30 23:41:17,719 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 284 [2018-09-30 23:41:17,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:41:17,720 INFO L225 Difference]: With dead ends: 293 [2018-09-30 23:41:17,720 INFO L226 Difference]: Without dead ends: 291 [2018-09-30 23:41:17,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5113 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=8032, Invalid=13430, Unknown=0, NotChecked=0, Total=21462 [2018-09-30 23:41:17,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-09-30 23:41:17,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 287. [2018-09-30 23:41:17,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-09-30 23:41:17,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 288 transitions. [2018-09-30 23:41:17,831 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 288 transitions. Word has length 284 [2018-09-30 23:41:17,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:41:17,831 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 288 transitions. [2018-09-30 23:41:17,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 23:41:17,832 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 288 transitions. [2018-09-30 23:41:17,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-09-30 23:41:17,832 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:41:17,832 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 70, 70, 1, 1, 1, 1] [2018-09-30 23:41:17,833 INFO L423 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:41:17,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:41:17,833 INFO L82 PathProgramCache]: Analyzing trace with hash 2110195277, now seen corresponding path program 139 times [2018-09-30 23:41:17,833 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:41:17,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:41:17,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:41:17,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:41:17,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:41:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:41:23,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 4970 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:41:23,650 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:41:23,650 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:41:23,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:41:23,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:41:23,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:41:23,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 4970 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:41:23,924 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:41:23,924 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [143, 143] total 143 [2018-09-30 23:41:23,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-30 23:41:23,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-30 23:41:23,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=15337, Unknown=0, NotChecked=0, Total=20592 [2018-09-30 23:41:23,926 INFO L87 Difference]: Start difference. First operand 287 states and 288 transitions. Second operand 144 states. [2018-09-30 23:41:31,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:41:31,636 INFO L93 Difference]: Finished difference Result 434 states and 436 transitions. [2018-09-30 23:41:31,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-09-30 23:41:31,637 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 286 [2018-09-30 23:41:31,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:41:31,637 INFO L225 Difference]: With dead ends: 434 [2018-09-30 23:41:31,637 INFO L226 Difference]: Without dead ends: 289 [2018-09-30 23:41:31,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7385 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=10509, Invalid=35501, Unknown=0, NotChecked=0, Total=46010 [2018-09-30 23:41:31,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2018-09-30 23:41:31,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2018-09-30 23:41:31,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-09-30 23:41:31,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 290 transitions. [2018-09-30 23:41:31,809 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 290 transitions. Word has length 286 [2018-09-30 23:41:31,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:41:31,810 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 290 transitions. [2018-09-30 23:41:31,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-30 23:41:31,810 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 290 transitions. [2018-09-30 23:41:31,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-09-30 23:41:31,811 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:41:31,811 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 71, 70, 1, 1, 1, 1] [2018-09-30 23:41:31,812 INFO L423 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:41:31,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:41:31,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1001281657, now seen corresponding path program 140 times [2018-09-30 23:41:31,812 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:41:31,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:41:31,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:41:31,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:41:31,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:41:31,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:41:34,123 INFO L134 CoverageAnalysis]: Checked inductivity of 10082 backedges. 5112 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:41:34,124 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:41:34,124 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:41:34,131 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:41:34,311 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:41:34,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:41:34,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:41:34,518 INFO L134 CoverageAnalysis]: Checked inductivity of 10082 backedges. 5112 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:41:34,539 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:41:34,539 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 77 [2018-09-30 23:41:34,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 23:41:34,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 23:41:34,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2857, Invalid=3149, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:41:34,540 INFO L87 Difference]: Start difference. First operand 289 states and 290 transitions. Second operand 78 states. [2018-09-30 23:41:37,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:41:37,114 INFO L93 Difference]: Finished difference Result 297 states and 298 transitions. [2018-09-30 23:41:37,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2018-09-30 23:41:37,114 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 288 [2018-09-30 23:41:37,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:41:37,115 INFO L225 Difference]: With dead ends: 297 [2018-09-30 23:41:37,115 INFO L226 Difference]: Without dead ends: 295 [2018-09-30 23:41:37,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5257 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=8253, Invalid=13799, Unknown=0, NotChecked=0, Total=22052 [2018-09-30 23:41:37,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2018-09-30 23:41:37,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 291. [2018-09-30 23:41:37,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-09-30 23:41:37,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 292 transitions. [2018-09-30 23:41:37,221 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 292 transitions. Word has length 288 [2018-09-30 23:41:37,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:41:37,221 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 292 transitions. [2018-09-30 23:41:37,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 23:41:37,221 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 292 transitions. [2018-09-30 23:41:37,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-09-30 23:41:37,222 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:41:37,222 INFO L375 BasicCegarLoop]: trace histogram [72, 72, 71, 71, 1, 1, 1, 1] [2018-09-30 23:41:37,222 INFO L423 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:41:37,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:41:37,222 INFO L82 PathProgramCache]: Analyzing trace with hash -159064829, now seen corresponding path program 141 times [2018-09-30 23:41:37,222 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:41:37,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:41:37,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:41:37,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:41:37,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:41:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:41:43,295 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 5112 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:41:43,295 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:41:43,295 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:41:43,303 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:41:43,673 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 72 check-sat command(s) [2018-09-30 23:41:43,673 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:41:43,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:41:43,751 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 5112 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:41:43,772 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:41:43,773 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [145, 145] total 145 [2018-09-30 23:41:43,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-30 23:41:43,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-30 23:41:43,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5401, Invalid=15769, Unknown=0, NotChecked=0, Total=21170 [2018-09-30 23:41:43,774 INFO L87 Difference]: Start difference. First operand 291 states and 292 transitions. Second operand 146 states. [2018-09-30 23:41:51,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:41:51,665 INFO L93 Difference]: Finished difference Result 440 states and 442 transitions. [2018-09-30 23:41:51,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-09-30 23:41:51,666 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 290 [2018-09-30 23:41:51,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:41:51,666 INFO L225 Difference]: With dead ends: 440 [2018-09-30 23:41:51,667 INFO L226 Difference]: Without dead ends: 293 [2018-09-30 23:41:51,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7597 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=10801, Invalid=36505, Unknown=0, NotChecked=0, Total=47306 [2018-09-30 23:41:51,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-09-30 23:41:51,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2018-09-30 23:41:51,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-09-30 23:41:51,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 294 transitions. [2018-09-30 23:41:51,782 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 294 transitions. Word has length 290 [2018-09-30 23:41:51,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:41:51,782 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 294 transitions. [2018-09-30 23:41:51,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-30 23:41:51,783 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 294 transitions. [2018-09-30 23:41:51,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-09-30 23:41:51,783 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:41:51,783 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 72, 71, 1, 1, 1, 1] [2018-09-30 23:41:51,784 INFO L423 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:41:51,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:41:51,784 INFO L82 PathProgramCache]: Analyzing trace with hash -938979011, now seen corresponding path program 142 times [2018-09-30 23:41:51,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:41:51,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:41:51,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:41:51,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:41:51,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:41:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:41:54,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10368 backedges. 5256 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:41:54,369 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:41:54,369 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:41:54,376 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:41:54,573 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:41:54,574 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:41:54,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:41:54,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10368 backedges. 5256 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:41:54,806 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:41:54,807 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 78 [2018-09-30 23:41:54,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 23:41:54,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 23:41:54,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2933, Invalid=3229, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:41:54,808 INFO L87 Difference]: Start difference. First operand 293 states and 294 transitions. Second operand 79 states. [2018-09-30 23:41:57,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:41:57,325 INFO L93 Difference]: Finished difference Result 301 states and 302 transitions. [2018-09-30 23:41:57,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-09-30 23:41:57,326 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 292 [2018-09-30 23:41:57,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:41:57,327 INFO L225 Difference]: With dead ends: 301 [2018-09-30 23:41:57,327 INFO L226 Difference]: Without dead ends: 299 [2018-09-30 23:41:57,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5403 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=8477, Invalid=14173, Unknown=0, NotChecked=0, Total=22650 [2018-09-30 23:41:57,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-09-30 23:41:57,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 295. [2018-09-30 23:41:57,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-09-30 23:41:57,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 296 transitions. [2018-09-30 23:41:57,444 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 296 transitions. Word has length 292 [2018-09-30 23:41:57,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:41:57,445 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 296 transitions. [2018-09-30 23:41:57,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 23:41:57,445 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 296 transitions. [2018-09-30 23:41:57,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-09-30 23:41:57,445 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:41:57,446 INFO L375 BasicCegarLoop]: trace histogram [73, 73, 72, 72, 1, 1, 1, 1] [2018-09-30 23:41:57,446 INFO L423 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:41:57,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:41:57,446 INFO L82 PathProgramCache]: Analyzing trace with hash -415764167, now seen corresponding path program 143 times [2018-09-30 23:41:57,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:41:57,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:41:57,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:41:57,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:41:57,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:41:57,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:42:03,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 5256 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:42:03,623 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:42:03,623 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:42:03,630 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:42:04,005 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2018-09-30 23:42:04,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:42:04,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:42:04,086 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 5256 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:42:04,107 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:42:04,107 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 147] total 147 [2018-09-30 23:42:04,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-30 23:42:04,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-30 23:42:04,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5549, Invalid=16207, Unknown=0, NotChecked=0, Total=21756 [2018-09-30 23:42:04,109 INFO L87 Difference]: Start difference. First operand 295 states and 296 transitions. Second operand 148 states. [2018-09-30 23:42:12,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:42:12,351 INFO L93 Difference]: Finished difference Result 446 states and 448 transitions. [2018-09-30 23:42:12,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-09-30 23:42:12,352 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 294 [2018-09-30 23:42:12,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:42:12,352 INFO L225 Difference]: With dead ends: 446 [2018-09-30 23:42:12,352 INFO L226 Difference]: Without dead ends: 297 [2018-09-30 23:42:12,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7812 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=11097, Invalid=37523, Unknown=0, NotChecked=0, Total=48620 [2018-09-30 23:42:12,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2018-09-30 23:42:12,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2018-09-30 23:42:12,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2018-09-30 23:42:12,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 298 transitions. [2018-09-30 23:42:12,463 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 298 transitions. Word has length 294 [2018-09-30 23:42:12,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:42:12,463 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 298 transitions. [2018-09-30 23:42:12,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-09-30 23:42:12,463 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 298 transitions. [2018-09-30 23:42:12,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2018-09-30 23:42:12,464 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:42:12,464 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 73, 72, 1, 1, 1, 1] [2018-09-30 23:42:12,465 INFO L423 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:42:12,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:42:12,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1525499789, now seen corresponding path program 144 times [2018-09-30 23:42:12,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:42:12,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:42:12,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:42:12,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:42:12,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:42:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:42:15,129 INFO L134 CoverageAnalysis]: Checked inductivity of 10658 backedges. 5402 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:42:15,129 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:42:15,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:42:15,136 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:42:15,509 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 74 check-sat command(s) [2018-09-30 23:42:15,509 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:42:15,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:42:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10658 backedges. 5402 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:42:15,736 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:42:15,736 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 79 [2018-09-30 23:42:15,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 23:42:15,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 23:42:15,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3010, Invalid=3310, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:42:15,737 INFO L87 Difference]: Start difference. First operand 297 states and 298 transitions. Second operand 80 states. [2018-09-30 23:42:18,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:42:18,609 INFO L93 Difference]: Finished difference Result 305 states and 306 transitions. [2018-09-30 23:42:18,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2018-09-30 23:42:18,609 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 296 [2018-09-30 23:42:18,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:42:18,610 INFO L225 Difference]: With dead ends: 305 [2018-09-30 23:42:18,610 INFO L226 Difference]: Without dead ends: 303 [2018-09-30 23:42:18,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5551 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=8704, Invalid=14552, Unknown=0, NotChecked=0, Total=23256 [2018-09-30 23:42:18,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-09-30 23:42:18,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 299. [2018-09-30 23:42:18,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-09-30 23:42:18,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 300 transitions. [2018-09-30 23:42:18,771 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 300 transitions. Word has length 296 [2018-09-30 23:42:18,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:42:18,771 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 300 transitions. [2018-09-30 23:42:18,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 23:42:18,771 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 300 transitions. [2018-09-30 23:42:18,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-09-30 23:42:18,772 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:42:18,772 INFO L375 BasicCegarLoop]: trace histogram [74, 74, 73, 73, 1, 1, 1, 1] [2018-09-30 23:42:18,772 INFO L423 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:42:18,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:42:18,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1421516049, now seen corresponding path program 145 times [2018-09-30 23:42:18,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:42:18,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:42:18,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:42:18,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:42:18,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:42:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:42:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 5402 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:42:25,218 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:42:25,218 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:42:25,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:42:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:42:25,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:42:25,492 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 5402 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:42:25,513 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:42:25,513 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [149, 149] total 149 [2018-09-30 23:42:25,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-30 23:42:25,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-30 23:42:25,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5699, Invalid=16651, Unknown=0, NotChecked=0, Total=22350 [2018-09-30 23:42:25,515 INFO L87 Difference]: Start difference. First operand 299 states and 300 transitions. Second operand 150 states. [2018-09-30 23:42:30,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:42:30,618 INFO L93 Difference]: Finished difference Result 452 states and 454 transitions. [2018-09-30 23:42:30,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2018-09-30 23:42:30,618 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 298 [2018-09-30 23:42:30,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:42:30,619 INFO L225 Difference]: With dead ends: 452 [2018-09-30 23:42:30,619 INFO L226 Difference]: Without dead ends: 301 [2018-09-30 23:42:30,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8030 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=11397, Invalid=38555, Unknown=0, NotChecked=0, Total=49952 [2018-09-30 23:42:30,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2018-09-30 23:42:30,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2018-09-30 23:42:30,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2018-09-30 23:42:30,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 302 transitions. [2018-09-30 23:42:30,730 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 302 transitions. Word has length 298 [2018-09-30 23:42:30,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:42:30,730 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 302 transitions. [2018-09-30 23:42:30,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-30 23:42:30,731 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 302 transitions. [2018-09-30 23:42:30,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2018-09-30 23:42:30,731 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:42:30,731 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 74, 73, 1, 1, 1, 1] [2018-09-30 23:42:30,732 INFO L423 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:42:30,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:42:30,732 INFO L82 PathProgramCache]: Analyzing trace with hash -476709591, now seen corresponding path program 146 times [2018-09-30 23:42:30,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:42:30,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:42:30,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:42:30,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:42:30,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:42:30,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:42:33,180 INFO L134 CoverageAnalysis]: Checked inductivity of 10952 backedges. 5550 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:42:33,180 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:42:33,180 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:42:33,189 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:42:33,373 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:42:33,373 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:42:33,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:42:33,775 INFO L134 CoverageAnalysis]: Checked inductivity of 10952 backedges. 5550 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:42:33,797 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:42:33,797 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 80 [2018-09-30 23:42:33,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 23:42:33,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 23:42:33,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3088, Invalid=3392, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 23:42:33,798 INFO L87 Difference]: Start difference. First operand 301 states and 302 transitions. Second operand 81 states. [2018-09-30 23:42:36,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:42:36,478 INFO L93 Difference]: Finished difference Result 309 states and 310 transitions. [2018-09-30 23:42:36,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2018-09-30 23:42:36,478 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 300 [2018-09-30 23:42:36,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:42:36,479 INFO L225 Difference]: With dead ends: 309 [2018-09-30 23:42:36,479 INFO L226 Difference]: Without dead ends: 307 [2018-09-30 23:42:36,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5701 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=8934, Invalid=14936, Unknown=0, NotChecked=0, Total=23870 [2018-09-30 23:42:36,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2018-09-30 23:42:36,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 303. [2018-09-30 23:42:36,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2018-09-30 23:42:36,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 304 transitions. [2018-09-30 23:42:36,602 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 304 transitions. Word has length 300 [2018-09-30 23:42:36,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:42:36,603 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 304 transitions. [2018-09-30 23:42:36,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 23:42:36,603 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 304 transitions. [2018-09-30 23:42:36,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-09-30 23:42:36,604 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:42:36,604 INFO L375 BasicCegarLoop]: trace histogram [75, 75, 74, 74, 1, 1, 1, 1] [2018-09-30 23:42:36,604 INFO L423 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:42:36,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:42:36,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1443516965, now seen corresponding path program 147 times [2018-09-30 23:42:36,604 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:42:36,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:42:36,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:42:36,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:42:36,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:42:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:42:43,142 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 5550 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:42:43,143 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:42:43,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:42:43,149 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:42:43,551 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 75 check-sat command(s) [2018-09-30 23:42:43,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:42:43,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:42:43,635 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 5550 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:42:43,657 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:42:43,658 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [151, 151] total 151 [2018-09-30 23:42:43,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-09-30 23:42:43,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-09-30 23:42:43,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5851, Invalid=17101, Unknown=0, NotChecked=0, Total=22952 [2018-09-30 23:42:43,659 INFO L87 Difference]: Start difference. First operand 303 states and 304 transitions. Second operand 152 states. [2018-09-30 23:42:52,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:42:52,291 INFO L93 Difference]: Finished difference Result 458 states and 460 transitions. [2018-09-30 23:42:52,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-09-30 23:42:52,291 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 302 [2018-09-30 23:42:52,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:42:52,291 INFO L225 Difference]: With dead ends: 458 [2018-09-30 23:42:52,292 INFO L226 Difference]: Without dead ends: 305 [2018-09-30 23:42:52,293 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8251 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=11701, Invalid=39601, Unknown=0, NotChecked=0, Total=51302 [2018-09-30 23:42:52,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2018-09-30 23:42:52,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2018-09-30 23:42:52,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2018-09-30 23:42:52,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 306 transitions. [2018-09-30 23:42:52,412 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 306 transitions. Word has length 302 [2018-09-30 23:42:52,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:42:52,412 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 306 transitions. [2018-09-30 23:42:52,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-09-30 23:42:52,413 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 306 transitions. [2018-09-30 23:42:52,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-09-30 23:42:52,413 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:42:52,413 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 75, 74, 1, 1, 1, 1] [2018-09-30 23:42:52,414 INFO L423 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:42:52,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:42:52,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1672429407, now seen corresponding path program 148 times [2018-09-30 23:42:52,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:42:52,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:42:52,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:42:52,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:42:52,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:42:52,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:42:55,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11250 backedges. 5700 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:42:55,202 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:42:55,202 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:42:55,209 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:42:55,417 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:42:55,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:42:55,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:42:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 11250 backedges. 5700 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:42:55,659 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:42:55,659 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 81 [2018-09-30 23:42:55,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 23:42:55,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 23:42:55,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3167, Invalid=3475, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:42:55,660 INFO L87 Difference]: Start difference. First operand 305 states and 306 transitions. Second operand 82 states. [2018-09-30 23:42:58,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:42:58,321 INFO L93 Difference]: Finished difference Result 313 states and 314 transitions. [2018-09-30 23:42:58,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2018-09-30 23:42:58,321 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 304 [2018-09-30 23:42:58,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:42:58,322 INFO L225 Difference]: With dead ends: 313 [2018-09-30 23:42:58,322 INFO L226 Difference]: Without dead ends: 311 [2018-09-30 23:42:58,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5853 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=9167, Invalid=15325, Unknown=0, NotChecked=0, Total=24492 [2018-09-30 23:42:58,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2018-09-30 23:42:58,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 307. [2018-09-30 23:42:58,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2018-09-30 23:42:58,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 308 transitions. [2018-09-30 23:42:58,465 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 308 transitions. Word has length 304 [2018-09-30 23:42:58,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:42:58,465 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 308 transitions. [2018-09-30 23:42:58,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 23:42:58,465 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 308 transitions. [2018-09-30 23:42:58,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2018-09-30 23:42:58,466 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:42:58,466 INFO L375 BasicCegarLoop]: trace histogram [76, 76, 75, 75, 1, 1, 1, 1] [2018-09-30 23:42:58,466 INFO L423 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:42:58,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:42:58,467 INFO L82 PathProgramCache]: Analyzing trace with hash 886824667, now seen corresponding path program 149 times [2018-09-30 23:42:58,467 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:42:58,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:42:58,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:42:58,467 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:42:58,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:42:58,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:05,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 5700 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:05,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:05,497 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:05,503 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:43:05,909 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 76 check-sat command(s) [2018-09-30 23:43:05,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:05,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:05,995 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 5700 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:06,017 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:06,017 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [153, 153] total 153 [2018-09-30 23:43:06,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-09-30 23:43:06,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-09-30 23:43:06,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6005, Invalid=17557, Unknown=0, NotChecked=0, Total=23562 [2018-09-30 23:43:06,019 INFO L87 Difference]: Start difference. First operand 307 states and 308 transitions. Second operand 154 states. [2018-09-30 23:43:13,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:13,269 INFO L93 Difference]: Finished difference Result 464 states and 466 transitions. [2018-09-30 23:43:13,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2018-09-30 23:43:13,269 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 306 [2018-09-30 23:43:13,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:13,270 INFO L225 Difference]: With dead ends: 464 [2018-09-30 23:43:13,270 INFO L226 Difference]: Without dead ends: 309 [2018-09-30 23:43:13,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8475 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=12009, Invalid=40661, Unknown=0, NotChecked=0, Total=52670 [2018-09-30 23:43:13,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-09-30 23:43:13,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2018-09-30 23:43:13,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2018-09-30 23:43:13,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 310 transitions. [2018-09-30 23:43:13,449 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 310 transitions. Word has length 306 [2018-09-30 23:43:13,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:13,449 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 310 transitions. [2018-09-30 23:43:13,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-09-30 23:43:13,449 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 310 transitions. [2018-09-30 23:43:13,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-09-30 23:43:13,451 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:13,451 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 76, 75, 1, 1, 1, 1] [2018-09-30 23:43:13,451 INFO L423 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:13,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:13,451 INFO L82 PathProgramCache]: Analyzing trace with hash -546070763, now seen corresponding path program 150 times [2018-09-30 23:43:13,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:13,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:13,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:13,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:13,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:13,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:16,380 INFO L134 CoverageAnalysis]: Checked inductivity of 11552 backedges. 5852 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:16,380 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:16,380 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:16,387 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:43:16,787 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 77 check-sat command(s) [2018-09-30 23:43:16,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:16,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 11552 backedges. 5852 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:17,059 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:17,059 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 82 [2018-09-30 23:43:17,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 23:43:17,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 23:43:17,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3247, Invalid=3559, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:43:17,060 INFO L87 Difference]: Start difference. First operand 309 states and 310 transitions. Second operand 83 states. [2018-09-30 23:43:20,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:20,075 INFO L93 Difference]: Finished difference Result 317 states and 318 transitions. [2018-09-30 23:43:20,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2018-09-30 23:43:20,076 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 308 [2018-09-30 23:43:20,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:20,077 INFO L225 Difference]: With dead ends: 317 [2018-09-30 23:43:20,077 INFO L226 Difference]: Without dead ends: 315 [2018-09-30 23:43:20,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6007 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=9403, Invalid=15719, Unknown=0, NotChecked=0, Total=25122 [2018-09-30 23:43:20,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-09-30 23:43:20,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 311. [2018-09-30 23:43:20,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2018-09-30 23:43:20,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 312 transitions. [2018-09-30 23:43:20,199 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 312 transitions. Word has length 308 [2018-09-30 23:43:20,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:20,199 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 312 transitions. [2018-09-30 23:43:20,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 23:43:20,199 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 312 transitions. [2018-09-30 23:43:20,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-09-30 23:43:20,200 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:20,200 INFO L375 BasicCegarLoop]: trace histogram [77, 77, 76, 76, 1, 1, 1, 1] [2018-09-30 23:43:20,200 INFO L423 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:20,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:20,200 INFO L82 PathProgramCache]: Analyzing trace with hash -788059887, now seen corresponding path program 151 times [2018-09-30 23:43:20,200 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:20,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:20,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:20,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:20,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:20,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:27,056 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 5852 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:27,057 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:27,057 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:27,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:43:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:27,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:27,340 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 5852 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:27,361 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:27,362 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [155, 155] total 155 [2018-09-30 23:43:27,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-09-30 23:43:27,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-09-30 23:43:27,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6161, Invalid=18019, Unknown=0, NotChecked=0, Total=24180 [2018-09-30 23:43:27,363 INFO L87 Difference]: Start difference. First operand 311 states and 312 transitions. Second operand 156 states. [2018-09-30 23:43:35,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:35,123 INFO L93 Difference]: Finished difference Result 470 states and 472 transitions. [2018-09-30 23:43:35,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2018-09-30 23:43:35,123 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 310 [2018-09-30 23:43:35,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:35,123 INFO L225 Difference]: With dead ends: 470 [2018-09-30 23:43:35,123 INFO L226 Difference]: Without dead ends: 313 [2018-09-30 23:43:35,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8702 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=12321, Invalid=41735, Unknown=0, NotChecked=0, Total=54056 [2018-09-30 23:43:35,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2018-09-30 23:43:35,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2018-09-30 23:43:35,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2018-09-30 23:43:35,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 314 transitions. [2018-09-30 23:43:35,239 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 314 transitions. Word has length 310 [2018-09-30 23:43:35,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:35,240 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 314 transitions. [2018-09-30 23:43:35,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-09-30 23:43:35,240 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 314 transitions. [2018-09-30 23:43:35,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2018-09-30 23:43:35,241 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:35,241 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 77, 76, 1, 1, 1, 1] [2018-09-30 23:43:35,241 INFO L423 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:35,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:35,242 INFO L82 PathProgramCache]: Analyzing trace with hash -319800245, now seen corresponding path program 152 times [2018-09-30 23:43:35,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:35,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:35,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:35,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:43:35,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:37,815 INFO L134 CoverageAnalysis]: Checked inductivity of 11858 backedges. 6006 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:37,815 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:37,815 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:37,822 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:43:38,014 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:43:38,014 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:38,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 11858 backedges. 6006 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:38,260 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:38,260 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 83 [2018-09-30 23:43:38,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 23:43:38,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 23:43:38,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3328, Invalid=3644, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:43:38,261 INFO L87 Difference]: Start difference. First operand 313 states and 314 transitions. Second operand 84 states. [2018-09-30 23:43:41,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:41,321 INFO L93 Difference]: Finished difference Result 321 states and 322 transitions. [2018-09-30 23:43:41,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2018-09-30 23:43:41,321 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 312 [2018-09-30 23:43:41,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:41,321 INFO L225 Difference]: With dead ends: 321 [2018-09-30 23:43:41,321 INFO L226 Difference]: Without dead ends: 319 [2018-09-30 23:43:41,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6163 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=9642, Invalid=16118, Unknown=0, NotChecked=0, Total=25760 [2018-09-30 23:43:41,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-09-30 23:43:41,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 315. [2018-09-30 23:43:41,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-09-30 23:43:41,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 316 transitions. [2018-09-30 23:43:41,513 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 316 transitions. Word has length 312 [2018-09-30 23:43:41,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:41,514 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 316 transitions. [2018-09-30 23:43:41,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 23:43:41,514 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 316 transitions. [2018-09-30 23:43:41,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-09-30 23:43:41,515 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:41,515 INFO L375 BasicCegarLoop]: trace histogram [78, 78, 77, 77, 1, 1, 1, 1] [2018-09-30 23:43:41,515 INFO L423 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:41,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:41,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1909543111, now seen corresponding path program 153 times [2018-09-30 23:43:41,516 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:41,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:41,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:41,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:41,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:41,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:48,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 6006 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:48,442 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:48,442 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:48,449 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:43:48,884 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 78 check-sat command(s) [2018-09-30 23:43:48,884 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:48,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:48,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 6006 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:48,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:48,994 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [157, 157] total 157 [2018-09-30 23:43:48,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-09-30 23:43:48,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-09-30 23:43:48,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6319, Invalid=18487, Unknown=0, NotChecked=0, Total=24806 [2018-09-30 23:43:48,996 INFO L87 Difference]: Start difference. First operand 315 states and 316 transitions. Second operand 158 states. [2018-09-30 23:43:56,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:56,252 INFO L93 Difference]: Finished difference Result 476 states and 478 transitions. [2018-09-30 23:43:56,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2018-09-30 23:43:56,252 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 314 [2018-09-30 23:43:56,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:56,253 INFO L225 Difference]: With dead ends: 476 [2018-09-30 23:43:56,253 INFO L226 Difference]: Without dead ends: 317 [2018-09-30 23:43:56,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8932 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=12637, Invalid=42823, Unknown=0, NotChecked=0, Total=55460 [2018-09-30 23:43:56,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2018-09-30 23:43:56,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2018-09-30 23:43:56,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2018-09-30 23:43:56,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 318 transitions. [2018-09-30 23:43:56,382 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 318 transitions. Word has length 314 [2018-09-30 23:43:56,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:56,382 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 318 transitions. [2018-09-30 23:43:56,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-09-30 23:43:56,383 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 318 transitions. [2018-09-30 23:43:56,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-09-30 23:43:56,383 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:56,384 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 78, 77, 1, 1, 1, 1] [2018-09-30 23:43:56,384 INFO L423 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:56,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:56,384 INFO L82 PathProgramCache]: Analyzing trace with hash -2144717055, now seen corresponding path program 154 times [2018-09-30 23:43:56,384 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:56,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:56,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:56,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:56,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:56,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:59,006 INFO L134 CoverageAnalysis]: Checked inductivity of 12168 backedges. 6162 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:59,007 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:59,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:59,032 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:43:59,249 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:43:59,249 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:59,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:59,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12168 backedges. 6162 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:59,503 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:59,503 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 84 [2018-09-30 23:43:59,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 23:43:59,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 23:43:59,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3410, Invalid=3730, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 23:43:59,504 INFO L87 Difference]: Start difference. First operand 317 states and 318 transitions. Second operand 85 states. [2018-09-30 23:44:02,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:02,537 INFO L93 Difference]: Finished difference Result 325 states and 326 transitions. [2018-09-30 23:44:02,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2018-09-30 23:44:02,537 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 316 [2018-09-30 23:44:02,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:02,537 INFO L225 Difference]: With dead ends: 325 [2018-09-30 23:44:02,537 INFO L226 Difference]: Without dead ends: 323 [2018-09-30 23:44:02,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6321 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=9884, Invalid=16522, Unknown=0, NotChecked=0, Total=26406 [2018-09-30 23:44:02,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-09-30 23:44:02,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 319. [2018-09-30 23:44:02,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-09-30 23:44:02,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 320 transitions. [2018-09-30 23:44:02,663 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 320 transitions. Word has length 316 [2018-09-30 23:44:02,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:02,664 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 320 transitions. [2018-09-30 23:44:02,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 23:44:02,664 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 320 transitions. [2018-09-30 23:44:02,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-09-30 23:44:02,665 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:02,665 INFO L375 BasicCegarLoop]: trace histogram [79, 79, 78, 78, 1, 1, 1, 1] [2018-09-30 23:44:02,665 INFO L423 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:02,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:02,665 INFO L82 PathProgramCache]: Analyzing trace with hash 511145469, now seen corresponding path program 155 times [2018-09-30 23:44:02,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:02,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:02,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:02,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:02,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:09,654 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 6162 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:09,654 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:09,654 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:44:09,662 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:44:10,092 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 79 check-sat command(s) [2018-09-30 23:44:10,093 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:10,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:10,209 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 6162 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:10,232 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:10,232 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [159, 159] total 159 [2018-09-30 23:44:10,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-09-30 23:44:10,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-09-30 23:44:10,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6479, Invalid=18961, Unknown=0, NotChecked=0, Total=25440 [2018-09-30 23:44:10,234 INFO L87 Difference]: Start difference. First operand 319 states and 320 transitions. Second operand 160 states. [2018-09-30 23:44:17,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:17,991 INFO L93 Difference]: Finished difference Result 482 states and 484 transitions. [2018-09-30 23:44:17,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2018-09-30 23:44:17,991 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 318 [2018-09-30 23:44:17,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:17,992 INFO L225 Difference]: With dead ends: 482 [2018-09-30 23:44:17,992 INFO L226 Difference]: Without dead ends: 321 [2018-09-30 23:44:17,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9165 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=12957, Invalid=43925, Unknown=0, NotChecked=0, Total=56882 [2018-09-30 23:44:17,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2018-09-30 23:44:18,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 321. [2018-09-30 23:44:18,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2018-09-30 23:44:18,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 322 transitions. [2018-09-30 23:44:18,113 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 322 transitions. Word has length 318 [2018-09-30 23:44:18,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:18,114 INFO L480 AbstractCegarLoop]: Abstraction has 321 states and 322 transitions. [2018-09-30 23:44:18,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-09-30 23:44:18,114 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 322 transitions. [2018-09-30 23:44:18,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2018-09-30 23:44:18,114 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:18,115 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 79, 78, 1, 1, 1, 1] [2018-09-30 23:44:18,115 INFO L423 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:18,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:18,115 INFO L82 PathProgramCache]: Analyzing trace with hash -316756169, now seen corresponding path program 156 times [2018-09-30 23:44:18,115 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:18,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:18,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:18,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:18,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:20,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12482 backedges. 6320 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:20,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:20,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:44:20,852 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:44:21,278 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 80 check-sat command(s) [2018-09-30 23:44:21,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:21,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12482 backedges. 6320 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:21,527 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:21,527 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 85 [2018-09-30 23:44:21,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 23:44:21,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 23:44:21,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3493, Invalid=3817, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:44:21,528 INFO L87 Difference]: Start difference. First operand 321 states and 322 transitions. Second operand 86 states. [2018-09-30 23:44:24,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:24,497 INFO L93 Difference]: Finished difference Result 329 states and 330 transitions. [2018-09-30 23:44:24,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2018-09-30 23:44:24,497 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 320 [2018-09-30 23:44:24,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:24,498 INFO L225 Difference]: With dead ends: 329 [2018-09-30 23:44:24,498 INFO L226 Difference]: Without dead ends: 327 [2018-09-30 23:44:24,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6481 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=10129, Invalid=16931, Unknown=0, NotChecked=0, Total=27060 [2018-09-30 23:44:24,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-09-30 23:44:24,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 323. [2018-09-30 23:44:24,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-09-30 23:44:24,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 324 transitions. [2018-09-30 23:44:24,623 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 324 transitions. Word has length 320 [2018-09-30 23:44:24,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:24,623 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 324 transitions. [2018-09-30 23:44:24,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 23:44:24,624 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 324 transitions. [2018-09-30 23:44:24,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2018-09-30 23:44:24,624 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:24,624 INFO L375 BasicCegarLoop]: trace histogram [80, 80, 79, 79, 1, 1, 1, 1] [2018-09-30 23:44:24,625 INFO L423 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:24,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:24,625 INFO L82 PathProgramCache]: Analyzing trace with hash 539932851, now seen corresponding path program 157 times [2018-09-30 23:44:24,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:24,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:24,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:24,625 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:24,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:32,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 6320 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:32,087 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:32,087 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:44:32,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:44:32,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:32,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:32,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 6320 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:32,430 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:32,431 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [161, 161] total 161 [2018-09-30 23:44:32,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-09-30 23:44:32,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-09-30 23:44:32,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6641, Invalid=19441, Unknown=0, NotChecked=0, Total=26082 [2018-09-30 23:44:32,432 INFO L87 Difference]: Start difference. First operand 323 states and 324 transitions. Second operand 162 states. [2018-09-30 23:44:40,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:40,199 INFO L93 Difference]: Finished difference Result 488 states and 490 transitions. [2018-09-30 23:44:40,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2018-09-30 23:44:40,199 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 322 [2018-09-30 23:44:40,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:40,200 INFO L225 Difference]: With dead ends: 488 [2018-09-30 23:44:40,200 INFO L226 Difference]: Without dead ends: 325 [2018-09-30 23:44:40,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9401 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=13281, Invalid=45041, Unknown=0, NotChecked=0, Total=58322 [2018-09-30 23:44:40,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2018-09-30 23:44:40,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2018-09-30 23:44:40,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2018-09-30 23:44:40,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 326 transitions. [2018-09-30 23:44:40,371 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 326 transitions. Word has length 322 [2018-09-30 23:44:40,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:40,371 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 326 transitions. [2018-09-30 23:44:40,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-09-30 23:44:40,372 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 326 transitions. [2018-09-30 23:44:40,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2018-09-30 23:44:40,372 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:40,373 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 80, 79, 1, 1, 1, 1] [2018-09-30 23:44:40,373 INFO L423 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:40,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:40,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1774372077, now seen corresponding path program 158 times [2018-09-30 23:44:40,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:40,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:40,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:40,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:44:40,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:43,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12800 backedges. 6480 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:43,345 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:43,345 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:44:43,352 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:44:43,552 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:44:43,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:43,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:43,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12800 backedges. 6480 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:43,800 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:43,800 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 86 [2018-09-30 23:44:43,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 23:44:43,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 23:44:43,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3577, Invalid=3905, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:44:43,801 INFO L87 Difference]: Start difference. First operand 325 states and 326 transitions. Second operand 87 states. [2018-09-30 23:44:47,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:47,029 INFO L93 Difference]: Finished difference Result 333 states and 334 transitions. [2018-09-30 23:44:47,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2018-09-30 23:44:47,030 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 324 [2018-09-30 23:44:47,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:47,030 INFO L225 Difference]: With dead ends: 333 [2018-09-30 23:44:47,030 INFO L226 Difference]: Without dead ends: 331 [2018-09-30 23:44:47,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6643 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=10377, Invalid=17345, Unknown=0, NotChecked=0, Total=27722 [2018-09-30 23:44:47,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2018-09-30 23:44:47,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 327. [2018-09-30 23:44:47,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2018-09-30 23:44:47,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 328 transitions. [2018-09-30 23:44:47,161 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 328 transitions. Word has length 324 [2018-09-30 23:44:47,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:47,161 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 328 transitions. [2018-09-30 23:44:47,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 23:44:47,161 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 328 transitions. [2018-09-30 23:44:47,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2018-09-30 23:44:47,162 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:47,162 INFO L375 BasicCegarLoop]: trace histogram [81, 81, 80, 80, 1, 1, 1, 1] [2018-09-30 23:44:47,162 INFO L423 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:47,162 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:47,162 INFO L82 PathProgramCache]: Analyzing trace with hash 69482729, now seen corresponding path program 159 times [2018-09-30 23:44:47,162 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:47,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:47,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:47,163 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:47,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:54,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 6480 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:54,719 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:54,719 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:44:54,726 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:44:55,188 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 81 check-sat command(s) [2018-09-30 23:44:55,189 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:55,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:55,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 6480 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:55,349 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:55,349 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [163, 163] total 163 [2018-09-30 23:44:55,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-09-30 23:44:55,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-09-30 23:44:55,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6805, Invalid=19927, Unknown=0, NotChecked=0, Total=26732 [2018-09-30 23:44:55,351 INFO L87 Difference]: Start difference. First operand 327 states and 328 transitions. Second operand 164 states. [2018-09-30 23:45:02,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:02,643 INFO L93 Difference]: Finished difference Result 494 states and 496 transitions. [2018-09-30 23:45:02,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2018-09-30 23:45:02,643 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 326 [2018-09-30 23:45:02,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:02,644 INFO L225 Difference]: With dead ends: 494 [2018-09-30 23:45:02,644 INFO L226 Difference]: Without dead ends: 329 [2018-09-30 23:45:02,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9640 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=13609, Invalid=46171, Unknown=0, NotChecked=0, Total=59780 [2018-09-30 23:45:02,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2018-09-30 23:45:02,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2018-09-30 23:45:02,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2018-09-30 23:45:02,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 330 transitions. [2018-09-30 23:45:02,779 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 330 transitions. Word has length 326 [2018-09-30 23:45:02,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:02,779 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 330 transitions. [2018-09-30 23:45:02,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-09-30 23:45:02,779 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 330 transitions. [2018-09-30 23:45:02,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-09-30 23:45:02,780 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:02,780 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 81, 80, 1, 1, 1, 1] [2018-09-30 23:45:02,780 INFO L423 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:02,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:02,780 INFO L82 PathProgramCache]: Analyzing trace with hash 268671011, now seen corresponding path program 160 times [2018-09-30 23:45:02,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:02,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:02,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:02,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:45:02,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-30 23:45:04,839 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 23:45:04,843 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 23:45:04,843 INFO L202 PluginConnector]: Adding new model down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 11:45:04 BoogieIcfgContainer [2018-09-30 23:45:04,844 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 23:45:04,844 INFO L168 Benchmark]: Toolchain (without parser) took 759298.24 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 316.1 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 334.2 MB). Peak memory consumption was 650.4 MB. Max. memory is 7.1 GB. [2018-09-30 23:45:04,846 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 23:45:04,846 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.06 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 23:45:04,846 INFO L168 Benchmark]: Boogie Preprocessor took 24.69 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 23:45:04,846 INFO L168 Benchmark]: RCFGBuilder took 277.37 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 23:45:04,847 INFO L168 Benchmark]: TraceAbstraction took 758946.64 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 316.1 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 313.1 MB). Peak memory consumption was 629.2 MB. Max. memory is 7.1 GB. [2018-09-30 23:45:04,849 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.06 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.69 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 277.37 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 758946.64 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 316.1 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 313.1 MB). Peak memory consumption was 629.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 66). Cancelled while BasicCegarLoop was analyzing trace of length 329 with TraceHistMax 82, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 73 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 758.8s OverallTime, 162 OverallIterations, 82 TraceHistogramMax, 384.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3966 SDtfs, 2039 SDslu, 19976 SDs, 0 SdLazy, 208194 SolverSat, 13832 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 114.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46619 GetRequests, 29778 SyntacticMatches, 0 SemanticMatches, 16841 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446213 ImplicationChecksByTransitivity, 518.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=329occurred in iteration=161, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 8.4s AutomataMinimizationTime, 161 MinimizatonAttempts, 320 StatesRemovedByMinimization, 80 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 3.9s SsaConstructionTime, 24.5s SatisfiabilityAnalysisTime, 325.1s InterpolantComputationTime, 53438 NumberOfCodeBlocks, 53438 NumberOfCodeBlocksAsserted, 3612 NumberOfCheckSat, 53118 ConstructedInterpolants, 0 QuantifiedInterpolants, 34624207 SizeOfPredicates, 511 NumberOfNonLiveVariables, 106054 ConjunctsInSsa, 13837 ConjunctsInUnsatCore, 320 InterpolantComputations, 2 PerfectInterpolantSequences, 708478/1403998 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/down.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_23-45-04-858.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/down.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_23-45-04-858.csv Completed graceful shutdown