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/up.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:26:46,292 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:26:46,294 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:26:46,306 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:26:46,307 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:26:46,308 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:26:46,309 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:26:46,311 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:26:46,313 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:26:46,313 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:26:46,314 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-26 21:26:46,338 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 [2018-09-26 21:26:46,353 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:26:46,353 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:26:46,354 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:26:46,354 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:26:46,355 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:26:46,355 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:26:46,355 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:26:46,356 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:26:46,356 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:26:46,356 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:26:46,356 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:26:46,356 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:26:46,357 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:26:46,357 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:26:46,357 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:26:46,357 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:26:46,357 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:26:46,357 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:26:46,358 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:26:46,358 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:26:46,358 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:26:46,358 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:26:46,358 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:26:46,359 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:26:46,359 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:26:46,359 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:26:46,359 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:26:46,359 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:26:46,360 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:26:46,360 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:26:46,401 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:26:46,414 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:26:46,418 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:26:46,420 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:26:46,420 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:26:46,421 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/up.i_4.bpl [2018-09-26 21:26:46,422 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/up.i_4.bpl' [2018-09-26 21:26:46,471 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:26:46,474 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:26:46,475 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:26:46,475 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:26:46,476 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:26:46,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:26:46" (1/1) ... [2018-09-26 21:26:46,503 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:26:46" (1/1) ... [2018-09-26 21:26:46,510 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:26:46,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:26:46,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:26:46,512 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:26:46,523 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:26:46" (1/1) ... [2018-09-26 21:26:46,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:26:46" (1/1) ... [2018-09-26 21:26:46,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:26:46" (1/1) ... [2018-09-26 21:26:46,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:26:46" (1/1) ... [2018-09-26 21:26:46,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:26:46" (1/1) ... [2018-09-26 21:26:46,530 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:26:46" (1/1) ... [2018-09-26 21:26:46,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:26:46" (1/1) ... [2018-09-26 21:26:46,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:26:46,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:26:46,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:26:46,534 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:26:46,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:26:46" (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 [2018-09-26 21:26:46,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-26 21:26:46,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-26 21:26:46,892 INFO L346 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-26 21:26:46,893 INFO L202 PluginConnector]: Adding new model up.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:26:46 BoogieIcfgContainer [2018-09-26 21:26:46,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:26:46,894 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:26:46,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:26:46,898 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:26:46,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:26:46" (1/2) ... [2018-09-26 21:26:46,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@558709ab and model type up.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:26:46, skipping insertion in model container [2018-09-26 21:26:46,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:26:46" (2/2) ... [2018-09-26 21:26:46,902 INFO L112 eAbstractionObserver]: Analyzing ICFG up.i_4.bpl [2018-09-26 21:26:46,913 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:26:46,922 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:26:46,978 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:26:46,979 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:26:46,979 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:26:46,980 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:26:46,980 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:26:46,980 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:26:46,980 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:26:46,980 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:26:46,981 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:26:46,998 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-09-26 21:26:47,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 21:26:47,005 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:26:47,006 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-26 21:26:47,007 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:26:47,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:26:47,014 INFO L82 PathProgramCache]: Analyzing trace with hash 889539593, now seen corresponding path program 1 times [2018-09-26 21:26:47,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:26:47,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:26:47,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:47,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:26:47,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:26:47,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:47,309 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:26:47,309 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-26 21:26:47,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:26:47,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:26:47,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:26:47,326 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2018-09-26 21:26:47,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:26:47,554 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2018-09-26 21:26:47,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:26:47,556 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-26 21:26:47,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:26:47,566 INFO L225 Difference]: With dead ends: 16 [2018-09-26 21:26:47,567 INFO L226 Difference]: Without dead ends: 9 [2018-09-26 21:26:47,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:26:47,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-26 21:26:47,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-26 21:26:47,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-26 21:26:47,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-26 21:26:47,607 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-09-26 21:26:47,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:26:47,608 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-26 21:26:47,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:26:47,608 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-26 21:26:47,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:26:47,609 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:26:47,609 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-26 21:26:47,609 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:26:47,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:26:47,610 INFO L82 PathProgramCache]: Analyzing trace with hash 198622019, now seen corresponding path program 1 times [2018-09-26 21:26:47,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:26:47,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:26:47,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:47,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:26:47,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:26:47,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:47,697 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:26:47,698 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-26 21:26:47,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:26:47,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:26:47,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:26:47,701 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-09-26 21:26:47,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:26:47,813 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-09-26 21:26:47,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:26:47,814 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-26 21:26:47,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:26:47,816 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:26:47,816 INFO L226 Difference]: Without dead ends: 15 [2018-09-26 21:26:47,817 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 [2018-09-26 21:26:47,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-26 21:26:47,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 11. [2018-09-26 21:26:47,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-26 21:26:47,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-26 21:26:47,822 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-09-26 21:26:47,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:26:47,822 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-26 21:26:47,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:26:47,823 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-26 21:26:47,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:26:47,823 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:26:47,824 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-09-26 21:26:47,824 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:26:47,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:26:47,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1897132479, now seen corresponding path program 1 times [2018-09-26 21:26:47,825 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:26:47,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:26:47,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:47,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:26:47,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:26:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:47,970 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:26:47,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:26:47,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:26:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:26:48,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:26:48,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:48,350 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:26:48,350 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-09-26 21:26:48,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:26:48,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:26:48,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:26:48,352 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 8 states. [2018-09-26 21:26:48,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:26:48,517 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-09-26 21:26:48,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:26:48,519 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2018-09-26 21:26:48,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:26:48,520 INFO L225 Difference]: With dead ends: 20 [2018-09-26 21:26:48,520 INFO L226 Difference]: Without dead ends: 13 [2018-09-26 21:26:48,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:26:48,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-26 21:26:48,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-26 21:26:48,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-26 21:26:48,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-09-26 21:26:48,526 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-09-26 21:26:48,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:26:48,526 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-09-26 21:26:48,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:26:48,527 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-09-26 21:26:48,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-26 21:26:48,528 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:26:48,528 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2018-09-26 21:26:48,528 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:26:48,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:26:48,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1765329927, now seen corresponding path program 2 times [2018-09-26 21:26:48,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:26:48,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:26:48,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:48,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:26:48,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:48,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:26:48,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:48,788 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:26:48,788 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 [2018-09-26 21:26:48,800 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:26:48,817 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:26:48,817 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:26:48,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:26:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:48,905 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:26:48,905 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2018-09-26 21:26:48,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:26:48,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:26:48,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:26:48,907 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-09-26 21:26:49,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:26:49,028 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-09-26 21:26:49,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:26:49,029 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2018-09-26 21:26:49,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:26:49,030 INFO L225 Difference]: With dead ends: 21 [2018-09-26 21:26:49,030 INFO L226 Difference]: Without dead ends: 19 [2018-09-26 21:26:49,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:26:49,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-26 21:26:49,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-09-26 21:26:49,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-26 21:26:49,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-09-26 21:26:49,038 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2018-09-26 21:26:49,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:26:49,038 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-09-26 21:26:49,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:26:49,039 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-09-26 21:26:49,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:26:49,039 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:26:49,039 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-09-26 21:26:49,040 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:26:49,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:26:49,040 INFO L82 PathProgramCache]: Analyzing trace with hash 29955317, now seen corresponding path program 3 times [2018-09-26 21:26:49,040 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:26:49,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:26:49,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:49,041 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:26:49,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:26:49,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:49,155 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:26:49,155 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 [2018-09-26 21:26:49,171 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:26:49,187 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-26 21:26:49,188 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:26:49,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:26:49,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:49,619 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:26:49,619 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-09-26 21:26:49,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:26:49,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:26:49,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:26:49,621 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-09-26 21:26:49,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:26:49,736 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-09-26 21:26:49,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:26:49,736 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2018-09-26 21:26:49,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:26:49,737 INFO L225 Difference]: With dead ends: 26 [2018-09-26 21:26:49,737 INFO L226 Difference]: Without dead ends: 17 [2018-09-26 21:26:49,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:26:49,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-26 21:26:49,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-26 21:26:49,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-26 21:26:49,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-09-26 21:26:49,742 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2018-09-26 21:26:49,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:26:49,743 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-09-26 21:26:49,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:26:49,743 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-09-26 21:26:49,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-26 21:26:49,744 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:26:49,744 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1] [2018-09-26 21:26:49,744 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:26:49,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:26:49,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1153652177, now seen corresponding path program 4 times [2018-09-26 21:26:49,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:26:49,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:26:49,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:49,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:26:49,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:49,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:26:49,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:49,884 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:26:49,884 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 [2018-09-26 21:26:49,892 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:26:49,914 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:26:49,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:26:49,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:26:49,952 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:49,973 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:26:49,973 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-09-26 21:26:49,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:26:49,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:26:49,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:26:49,975 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-09-26 21:26:50,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:26:50,111 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-09-26 21:26:50,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:26:50,112 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-26 21:26:50,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:26:50,113 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:26:50,113 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:26:50,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:26:50,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:26:50,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-09-26 21:26:50,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-26 21:26:50,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-09-26 21:26:50,119 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2018-09-26 21:26:50,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:26:50,119 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-09-26 21:26:50,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:26:50,119 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-09-26 21:26:50,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:26:50,120 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:26:50,120 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-09-26 21:26:50,121 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:26:50,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:26:50,121 INFO L82 PathProgramCache]: Analyzing trace with hash -558246485, now seen corresponding path program 5 times [2018-09-26 21:26:50,121 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:26:50,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:26:50,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:50,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:26:50,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:26:50,418 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:50,418 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:26:50,418 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 [2018-09-26 21:26:50,426 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:26:50,469 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-26 21:26:50,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:26:50,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:26:50,660 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:50,686 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:26:50,687 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2018-09-26 21:26:50,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:26:50,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:26:50,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:26:50,688 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 14 states. [2018-09-26 21:26:50,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:26:50,907 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-09-26 21:26:50,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:26:50,908 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2018-09-26 21:26:50,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:26:50,908 INFO L225 Difference]: With dead ends: 32 [2018-09-26 21:26:50,908 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 21:26:50,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:26:50,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 21:26:50,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-26 21:26:50,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-26 21:26:50,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-09-26 21:26:50,914 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-09-26 21:26:50,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:26:50,915 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-09-26 21:26:50,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:26:50,915 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-09-26 21:26:50,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-26 21:26:50,915 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:26:50,916 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1] [2018-09-26 21:26:50,916 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:26:50,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:26:50,916 INFO L82 PathProgramCache]: Analyzing trace with hash -578011675, now seen corresponding path program 6 times [2018-09-26 21:26:50,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:26:50,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:26:50,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:50,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:26:50,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:50,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:26:51,032 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:51,033 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:26:51,033 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 [2018-09-26 21:26:51,042 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:26:51,061 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-26 21:26:51,062 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:26:51,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:26:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:51,119 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:26:51,119 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-09-26 21:26:51,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:26:51,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:26:51,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:26:51,121 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-09-26 21:26:51,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:26:51,318 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-09-26 21:26:51,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:26:51,318 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-09-26 21:26:51,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:26:51,319 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:26:51,319 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:26:51,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:26:51,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:26:51,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2018-09-26 21:26:51,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-26 21:26:51,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-09-26 21:26:51,326 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2018-09-26 21:26:51,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:26:51,326 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-09-26 21:26:51,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:26:51,326 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-09-26 21:26:51,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 21:26:51,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:26:51,327 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2018-09-26 21:26:51,328 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:26:51,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:26:51,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1418505247, now seen corresponding path program 7 times [2018-09-26 21:26:51,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:26:51,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:26:51,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:51,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:26:51,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:51,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:26:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:51,478 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:26:51,478 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 [2018-09-26 21:26:51,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:26:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:26:51,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:26:51,677 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:51,698 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:26:51,698 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-09-26 21:26:51,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:26:51,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:26:51,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:26:51,699 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 17 states. [2018-09-26 21:26:52,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:26:52,174 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-09-26 21:26:52,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:26:52,174 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2018-09-26 21:26:52,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:26:52,175 INFO L225 Difference]: With dead ends: 38 [2018-09-26 21:26:52,175 INFO L226 Difference]: Without dead ends: 25 [2018-09-26 21:26:52,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:26:52,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-26 21:26:52,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-26 21:26:52,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-26 21:26:52,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-09-26 21:26:52,182 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2018-09-26 21:26:52,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:26:52,182 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-09-26 21:26:52,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:26:52,183 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-09-26 21:26:52,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-26 21:26:52,183 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:26:52,184 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1] [2018-09-26 21:26:52,184 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:26:52,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:26:52,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1375531237, now seen corresponding path program 8 times [2018-09-26 21:26:52,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:26:52,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:26:52,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:52,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:26:52,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:52,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:26:52,349 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:52,350 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:26:52,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:26:52,360 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:26:52,380 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:26:52,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:26:52,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:26:52,415 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:52,436 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:26:52,436 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-09-26 21:26:52,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:26:52,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:26:52,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:26:52,437 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2018-09-26 21:26:52,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:26:52,627 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-09-26 21:26:52,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:26:52,628 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2018-09-26 21:26:52,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:26:52,629 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:26:52,629 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:26:52,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:26:52,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:26:52,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2018-09-26 21:26:52,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-26 21:26:52,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-09-26 21:26:52,637 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-09-26 21:26:52,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:26:52,637 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-09-26 21:26:52,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:26:52,637 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-09-26 21:26:52,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-26 21:26:52,638 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:26:52,638 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-09-26 21:26:52,639 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:26:52,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:26:52,639 INFO L82 PathProgramCache]: Analyzing trace with hash 964341655, now seen corresponding path program 9 times [2018-09-26 21:26:52,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:26:52,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:26:52,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:52,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:26:52,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:26:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:52,827 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:26:52,827 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 [2018-09-26 21:26:52,836 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:26:52,939 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-26 21:26:52,940 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:26:52,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:26:53,227 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:53,256 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:26:53,256 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2018-09-26 21:26:53,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:26:53,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:26:53,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:26:53,258 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 20 states. [2018-09-26 21:26:53,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:26:53,633 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-09-26 21:26:53,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:26:53,634 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 26 [2018-09-26 21:26:53,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:26:53,635 INFO L225 Difference]: With dead ends: 44 [2018-09-26 21:26:53,635 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:26:53,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:26:53,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:26:53,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-26 21:26:53,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-26 21:26:53,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-09-26 21:26:53,642 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-09-26 21:26:53,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:26:53,642 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-09-26 21:26:53,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:26:53,642 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-09-26 21:26:53,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-26 21:26:53,643 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:26:53,643 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1] [2018-09-26 21:26:53,644 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:26:53,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:26:53,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1427751471, now seen corresponding path program 10 times [2018-09-26 21:26:53,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:26:53,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:26:53,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:53,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:26:53,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:26:53,907 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:53,907 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:26:53,908 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 [2018-09-26 21:26:53,915 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:26:53,942 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:26:53,942 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:26:53,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:26:53,990 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:54,010 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:26:54,010 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-09-26 21:26:54,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:26:54,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:26:54,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:26:54,012 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2018-09-26 21:26:54,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:26:54,361 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-09-26 21:26:54,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:26:54,362 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-09-26 21:26:54,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:26:54,363 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:26:54,363 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:26:54,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:26:54,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:26:54,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2018-09-26 21:26:54,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-26 21:26:54,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-09-26 21:26:54,370 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2018-09-26 21:26:54,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:26:54,370 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-09-26 21:26:54,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:26:54,371 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-09-26 21:26:54,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-26 21:26:54,371 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:26:54,371 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2018-09-26 21:26:54,372 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:26:54,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:26:54,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1974662963, now seen corresponding path program 11 times [2018-09-26 21:26:54,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:26:54,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:26:54,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:54,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:26:54,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:54,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:26:54,635 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:54,636 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:26:54,636 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 [2018-09-26 21:26:54,643 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:26:54,708 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:26:54,708 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:26:54,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:26:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:54,955 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:26:54,955 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2018-09-26 21:26:54,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:26:54,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:26:54,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:26:54,957 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 23 states. [2018-09-26 21:26:55,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:26:55,203 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-09-26 21:26:55,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:26:55,204 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2018-09-26 21:26:55,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:26:55,205 INFO L225 Difference]: With dead ends: 50 [2018-09-26 21:26:55,205 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:26:55,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=232, Invalid=638, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:26:55,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:26:55,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-26 21:26:55,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-26 21:26:55,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-09-26 21:26:55,212 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2018-09-26 21:26:55,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:26:55,212 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-09-26 21:26:55,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:26:55,212 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-09-26 21:26:55,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-26 21:26:55,213 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:26:55,213 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1] [2018-09-26 21:26:55,213 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:26:55,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:26:55,214 INFO L82 PathProgramCache]: Analyzing trace with hash 577956359, now seen corresponding path program 12 times [2018-09-26 21:26:55,214 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:26:55,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:26:55,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:55,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:26:55,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:55,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:26:55,361 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:55,362 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:26:55,362 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:26:55,370 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:26:55,399 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:26:55,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:26:55,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:26:55,471 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:55,491 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:26:55,491 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-09-26 21:26:55,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:26:55,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:26:55,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:26:55,492 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2018-09-26 21:26:55,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:26:55,819 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-09-26 21:26:55,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:26:55,819 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2018-09-26 21:26:55,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:26:55,820 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:26:55,820 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:26:55,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:26:55,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:26:55,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-09-26 21:26:55,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-26 21:26:55,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-09-26 21:26:55,827 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-09-26 21:26:55,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:26:55,828 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-09-26 21:26:55,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:26:55,828 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-09-26 21:26:55,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-26 21:26:55,829 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:26:55,829 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-09-26 21:26:55,829 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:26:55,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:26:55,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1365213059, now seen corresponding path program 13 times [2018-09-26 21:26:55,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:26:55,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:26:55,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:55,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:26:55,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:55,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:26:56,164 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:56,164 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:26:56,164 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:26:56,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:26:56,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:26:56,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:26:56,675 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:56,695 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:26:56,696 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2018-09-26 21:26:56,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:26:56,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:26:56,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:26:56,697 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 26 states. [2018-09-26 21:26:57,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:26:57,088 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-09-26 21:26:57,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:26:57,088 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2018-09-26 21:26:57,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:26:57,089 INFO L225 Difference]: With dead ends: 56 [2018-09-26 21:26:57,089 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:26:57,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:26:57,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:26:57,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-26 21:26:57,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-26 21:26:57,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-09-26 21:26:57,097 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-09-26 21:26:57,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:26:57,097 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-09-26 21:26:57,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:26:57,097 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-09-26 21:26:57,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-26 21:26:57,098 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:26:57,098 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1] [2018-09-26 21:26:57,099 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:26:57,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:26:57,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1260506179, now seen corresponding path program 14 times [2018-09-26 21:26:57,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:26:57,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:26:57,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:57,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:26:57,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:57,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:26:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:57,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:26:57,234 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 [2018-09-26 21:26:57,245 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:26:57,264 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:26:57,264 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:26:57,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:26:57,340 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:57,362 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:26:57,362 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-09-26 21:26:57,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:26:57,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:26:57,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:26:57,363 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-09-26 21:26:57,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:26:57,529 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-09-26 21:26:57,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:26:57,530 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-09-26 21:26:57,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:26:57,531 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:26:57,531 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:26:57,532 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 [2018-09-26 21:26:57,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:26:57,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-09-26 21:26:57,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-26 21:26:57,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-09-26 21:26:57,540 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2018-09-26 21:26:57,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:26:57,541 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-09-26 21:26:57,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:26:57,541 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-09-26 21:26:57,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-26 21:26:57,542 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:26:57,542 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2018-09-26 21:26:57,542 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:26:57,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:26:57,542 INFO L82 PathProgramCache]: Analyzing trace with hash -165727303, now seen corresponding path program 15 times [2018-09-26 21:26:57,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:26:57,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:26:57,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:57,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:26:57,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:57,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:26:58,588 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:58,589 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:26:58,589 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 [2018-09-26 21:26:58,599 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:26:58,629 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:26:58,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:26:58,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:26:58,818 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:58,838 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:26:58,839 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-09-26 21:26:58,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:26:58,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:26:58,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=604, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:26:58,840 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 29 states. [2018-09-26 21:26:59,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:26:59,284 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-09-26 21:26:59,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:26:59,284 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 38 [2018-09-26 21:26:59,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:26:59,285 INFO L225 Difference]: With dead ends: 62 [2018-09-26 21:26:59,285 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:26:59,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=361, Invalid=1045, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:26:59,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:26:59,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-26 21:26:59,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-26 21:26:59,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-09-26 21:26:59,293 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2018-09-26 21:26:59,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:26:59,294 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-09-26 21:26:59,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:26:59,294 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-09-26 21:26:59,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-26 21:26:59,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:26:59,295 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1] [2018-09-26 21:26:59,295 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:26:59,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:26:59,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1448426227, now seen corresponding path program 16 times [2018-09-26 21:26:59,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:26:59,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:26:59,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:59,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:26:59,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:59,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:26:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:59,552 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:26:59,553 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:26:59,560 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:26:59,585 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:26:59,585 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:26:59,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:26:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:59,650 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:26:59,651 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-09-26 21:26:59,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:26:59,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:26:59,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:26:59,652 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2018-09-26 21:27:00,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:00,111 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-09-26 21:27:00,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:27:00,112 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-09-26 21:27:00,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:00,113 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:27:00,114 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:27:00,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:27:00,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:27:00,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2018-09-26 21:27:00,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-26 21:27:00,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-09-26 21:27:00,123 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-09-26 21:27:00,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:00,124 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-09-26 21:27:00,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:27:00,124 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-09-26 21:27:00,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-26 21:27:00,125 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:00,125 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-09-26 21:27:00,125 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:00,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:00,126 INFO L82 PathProgramCache]: Analyzing trace with hash 368133487, now seen corresponding path program 17 times [2018-09-26 21:27:00,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:00,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:00,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:00,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:27:00,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:00,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:00,393 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:00,393 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 [2018-09-26 21:27:00,401 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:27:00,427 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-26 21:27:00,427 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:27:00,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:00,650 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:00,671 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:00,671 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2018-09-26 21:27:00,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:27:00,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:27:00,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=741, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:27:00,672 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 32 states. [2018-09-26 21:27:01,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:01,032 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-09-26 21:27:01,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:27:01,033 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 42 [2018-09-26 21:27:01,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:01,033 INFO L225 Difference]: With dead ends: 68 [2018-09-26 21:27:01,033 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:27:01,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=436, Invalid=1286, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:27:01,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:27:01,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-26 21:27:01,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-26 21:27:01,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-09-26 21:27:01,044 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-09-26 21:27:01,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:01,044 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-09-26 21:27:01,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:27:01,045 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-09-26 21:27:01,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-26 21:27:01,045 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:01,045 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1] [2018-09-26 21:27:01,046 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:01,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:01,046 INFO L82 PathProgramCache]: Analyzing trace with hash -788717655, now seen corresponding path program 18 times [2018-09-26 21:27:01,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:01,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:01,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:01,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:27:01,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:01,600 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:01,600 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:01,600 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 [2018-09-26 21:27:01,617 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:27:01,648 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-09-26 21:27:01,648 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:27:01,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:01,681 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:01,703 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:01,703 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-09-26 21:27:01,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:27:01,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:27:01,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:27:01,704 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2018-09-26 21:27:01,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:01,968 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-09-26 21:27:01,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:27:01,968 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-09-26 21:27:01,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:01,969 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:27:01,969 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:27:01,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=262, Invalid=440, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:27:01,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:27:01,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2018-09-26 21:27:01,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-26 21:27:01,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-09-26 21:27:01,977 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2018-09-26 21:27:01,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:01,977 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-09-26 21:27:01,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:27:01,977 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-09-26 21:27:01,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-26 21:27:01,978 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:01,978 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2018-09-26 21:27:01,978 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:01,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:01,978 INFO L82 PathProgramCache]: Analyzing trace with hash -2043489115, now seen corresponding path program 19 times [2018-09-26 21:27:01,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:01,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:01,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:01,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:27:01,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:01,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:02,362 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:02,363 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 [2018-09-26 21:27:02,370 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:27:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:02,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:02,779 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:02,803 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:02,803 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 34 [2018-09-26 21:27:02,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-26 21:27:02,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-26 21:27:02,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=892, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:27:02,805 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 35 states. [2018-09-26 21:27:03,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:03,225 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-09-26 21:27:03,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:27:03,225 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 46 [2018-09-26 21:27:03,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:03,226 INFO L225 Difference]: With dead ends: 74 [2018-09-26 21:27:03,226 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:27:03,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=518, Invalid=1552, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:27:03,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:27:03,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-26 21:27:03,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-26 21:27:03,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-09-26 21:27:03,233 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2018-09-26 21:27:03,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:03,233 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-09-26 21:27:03,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-26 21:27:03,233 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-09-26 21:27:03,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-26 21:27:03,234 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:03,234 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1] [2018-09-26 21:27:03,234 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:03,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:03,235 INFO L82 PathProgramCache]: Analyzing trace with hash -957152801, now seen corresponding path program 20 times [2018-09-26 21:27:03,235 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:03,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:03,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:03,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:27:03,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:03,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:03,812 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:03,812 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:03,813 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 [2018-09-26 21:27:03,825 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:27:03,861 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:27:03,861 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:27:03,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:04,015 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:04,015 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-09-26 21:27:04,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:27:04,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:27:04,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:27:04,016 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 17 states. [2018-09-26 21:27:04,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:04,264 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-09-26 21:27:04,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:27:04,267 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2018-09-26 21:27:04,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:04,267 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:27:04,268 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:27:04,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=303, Invalid=509, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:27:04,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:27:04,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2018-09-26 21:27:04,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-26 21:27:04,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-09-26 21:27:04,276 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-09-26 21:27:04,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:04,276 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-09-26 21:27:04,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:27:04,276 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-09-26 21:27:04,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-26 21:27:04,277 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:04,277 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-09-26 21:27:04,277 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:04,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:04,277 INFO L82 PathProgramCache]: Analyzing trace with hash -700907173, now seen corresponding path program 21 times [2018-09-26 21:27:04,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:04,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:04,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:04,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:27:04,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:05,722 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:05,722 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 [2018-09-26 21:27:05,729 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:27:05,791 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-26 21:27:05,791 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:27:05,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:06,099 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:06,122 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:06,122 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2018-09-26 21:27:06,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:27:06,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:27:06,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1057, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:27:06,123 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 38 states. [2018-09-26 21:27:06,689 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-26 21:27:06,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:06,857 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-09-26 21:27:06,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:27:06,857 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 50 [2018-09-26 21:27:06,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:06,858 INFO L225 Difference]: With dead ends: 80 [2018-09-26 21:27:06,858 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:27:06,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=607, Invalid=1843, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:27:06,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:27:06,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-26 21:27:06,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-26 21:27:06,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-09-26 21:27:06,867 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-09-26 21:27:06,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:06,868 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-09-26 21:27:06,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:27:06,868 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-09-26 21:27:06,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-26 21:27:06,869 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:06,869 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1] [2018-09-26 21:27:06,869 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:06,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:06,870 INFO L82 PathProgramCache]: Analyzing trace with hash 877396373, now seen corresponding path program 22 times [2018-09-26 21:27:06,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:06,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:06,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:06,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:27:06,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:06,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:07,242 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:07,242 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:07,242 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:27:07,252 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:27:07,282 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:27:07,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:27:07,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:07,434 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:07,454 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:07,454 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-09-26 21:27:07,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:27:07,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:27:07,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:27:07,455 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2018-09-26 21:27:07,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:07,748 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-09-26 21:27:07,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:27:07,749 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-09-26 21:27:07,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:07,750 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:27:07,750 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:27:07,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=347, Invalid=583, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:27:07,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:27:07,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-09-26 21:27:07,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-26 21:27:07,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-09-26 21:27:07,758 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2018-09-26 21:27:07,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:07,758 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-09-26 21:27:07,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:27:07,758 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-09-26 21:27:07,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-26 21:27:07,759 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:07,759 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2018-09-26 21:27:07,759 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:07,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:07,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1364257681, now seen corresponding path program 23 times [2018-09-26 21:27:07,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:07,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:07,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:07,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:27:07,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:08,263 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:08,264 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:27:08,274 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:27:08,388 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-26 21:27:08,388 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:27:08,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:08,750 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:08,770 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:08,770 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-09-26 21:27:08,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:27:08,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:27:08,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:27:08,771 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 41 states. [2018-09-26 21:27:09,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:09,165 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-09-26 21:27:09,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:27:09,166 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 54 [2018-09-26 21:27:09,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:09,166 INFO L225 Difference]: With dead ends: 86 [2018-09-26 21:27:09,167 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:27:09,168 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=703, Invalid=2159, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:27:09,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:27:09,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-26 21:27:09,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-26 21:27:09,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-09-26 21:27:09,174 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2018-09-26 21:27:09,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:09,174 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-09-26 21:27:09,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:27:09,174 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-09-26 21:27:09,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-26 21:27:09,174 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:09,174 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1] [2018-09-26 21:27:09,175 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:09,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:09,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1897217739, now seen corresponding path program 24 times [2018-09-26 21:27:09,175 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:09,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:09,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:09,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:27:09,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:09,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:09,373 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:09,373 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:09,373 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 [2018-09-26 21:27:09,380 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:27:09,416 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-26 21:27:09,416 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:27:09,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:09,450 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:09,470 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:09,471 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-09-26 21:27:09,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-26 21:27:09,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-26 21:27:09,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:27:09,472 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-09-26 21:27:09,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:09,741 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-09-26 21:27:09,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:27:09,741 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2018-09-26 21:27:09,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:09,742 INFO L225 Difference]: With dead ends: 65 [2018-09-26 21:27:09,742 INFO L226 Difference]: Without dead ends: 63 [2018-09-26 21:27:09,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=394, Invalid=662, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:27:09,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-26 21:27:09,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-09-26 21:27:09,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-26 21:27:09,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-09-26 21:27:09,750 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-09-26 21:27:09,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:09,750 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-09-26 21:27:09,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-26 21:27:09,750 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-09-26 21:27:09,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-26 21:27:09,751 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:09,751 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-09-26 21:27:09,751 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:09,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:09,752 INFO L82 PathProgramCache]: Analyzing trace with hash -2134920377, now seen corresponding path program 25 times [2018-09-26 21:27:09,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:09,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:09,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:09,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:27:09,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:09,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:10,095 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:10,095 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:10,095 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 [2018-09-26 21:27:10,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:27:10,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:10,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:10,525 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:10,525 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 43 [2018-09-26 21:27:10,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:27:10,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:27:10,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1429, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:27:10,526 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 44 states. [2018-09-26 21:27:11,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:11,043 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-09-26 21:27:11,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:27:11,043 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 58 [2018-09-26 21:27:11,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:11,043 INFO L225 Difference]: With dead ends: 92 [2018-09-26 21:27:11,043 INFO L226 Difference]: Without dead ends: 61 [2018-09-26 21:27:11,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=806, Invalid=2500, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:27:11,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-26 21:27:11,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-26 21:27:11,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-26 21:27:11,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-09-26 21:27:11,051 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2018-09-26 21:27:11,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:11,051 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-09-26 21:27:11,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:27:11,051 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-09-26 21:27:11,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-26 21:27:11,052 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:11,052 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1] [2018-09-26 21:27:11,052 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:11,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:11,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1286350463, now seen corresponding path program 26 times [2018-09-26 21:27:11,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:11,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:11,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:11,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:27:11,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:11,322 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:11,322 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 [2018-09-26 21:27:11,329 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:27:11,370 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:27:11,371 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:27:11,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:11,459 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:11,459 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-09-26 21:27:11,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:27:11,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:27:11,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:27:11,460 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2018-09-26 21:27:11,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:11,860 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-09-26 21:27:11,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:27:11,860 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-09-26 21:27:11,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:11,861 INFO L225 Difference]: With dead ends: 69 [2018-09-26 21:27:11,861 INFO L226 Difference]: Without dead ends: 67 [2018-09-26 21:27:11,862 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 [2018-09-26 21:27:11,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-26 21:27:11,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2018-09-26 21:27:11,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-26 21:27:11,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-09-26 21:27:11,872 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2018-09-26 21:27:11,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:11,872 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-09-26 21:27:11,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:27:11,872 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-09-26 21:27:11,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-26 21:27:11,872 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:11,873 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2018-09-26 21:27:11,873 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:11,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:11,873 INFO L82 PathProgramCache]: Analyzing trace with hash 767719549, now seen corresponding path program 27 times [2018-09-26 21:27:11,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:11,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:11,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:11,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:27:11,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:12,257 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:12,258 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:12,258 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 [2018-09-26 21:27:12,271 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:27:12,311 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-26 21:27:12,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:27:12,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:12,735 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:12,755 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:12,755 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2018-09-26 21:27:12,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-26 21:27:12,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-26 21:27:12,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=1636, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:27:12,756 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 47 states. [2018-09-26 21:27:13,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:13,360 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-09-26 21:27:13,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:27:13,360 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 62 [2018-09-26 21:27:13,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:13,361 INFO L225 Difference]: With dead ends: 98 [2018-09-26 21:27:13,361 INFO L226 Difference]: Without dead ends: 65 [2018-09-26 21:27:13,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=916, Invalid=2866, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:27:13,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-26 21:27:13,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-26 21:27:13,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-26 21:27:13,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-09-26 21:27:13,369 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2018-09-26 21:27:13,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:13,369 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-09-26 21:27:13,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-26 21:27:13,370 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-09-26 21:27:13,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-26 21:27:13,370 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:13,370 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1] [2018-09-26 21:27:13,370 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:13,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:13,371 INFO L82 PathProgramCache]: Analyzing trace with hash 285536695, now seen corresponding path program 28 times [2018-09-26 21:27:13,371 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:13,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:13,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:13,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:27:13,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:13,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:13,644 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:13,645 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:13,645 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 [2018-09-26 21:27:13,654 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:27:13,695 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:27:13,696 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:27:13,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:13,746 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:13,746 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2018-09-26 21:27:13,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-26 21:27:13,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-26 21:27:13,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:27:13,747 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 21 states. [2018-09-26 21:27:14,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:14,019 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-09-26 21:27:14,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:27:14,020 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2018-09-26 21:27:14,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:14,020 INFO L225 Difference]: With dead ends: 73 [2018-09-26 21:27:14,020 INFO L226 Difference]: Without dead ends: 71 [2018-09-26 21:27:14,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=497, Invalid=835, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:27:14,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-26 21:27:14,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2018-09-26 21:27:14,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-26 21:27:14,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-09-26 21:27:14,030 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2018-09-26 21:27:14,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:14,031 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-09-26 21:27:14,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-26 21:27:14,031 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-09-26 21:27:14,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-26 21:27:14,031 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:14,031 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-09-26 21:27:14,032 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:14,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:14,032 INFO L82 PathProgramCache]: Analyzing trace with hash -477209805, now seen corresponding path program 29 times [2018-09-26 21:27:14,032 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:14,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:14,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:14,033 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:27:14,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:14,534 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:14,534 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:14,534 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:27:14,542 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:27:14,688 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-26 21:27:14,689 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:27:14,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:15,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:15,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 49 [2018-09-26 21:27:15,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:27:15,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:27:15,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=1857, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:27:15,159 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 50 states. [2018-09-26 21:27:16,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:16,052 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-09-26 21:27:16,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:27:16,052 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 66 [2018-09-26 21:27:16,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:16,053 INFO L225 Difference]: With dead ends: 104 [2018-09-26 21:27:16,053 INFO L226 Difference]: Without dead ends: 69 [2018-09-26 21:27:16,054 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1033, Invalid=3257, Unknown=0, NotChecked=0, Total=4290 [2018-09-26 21:27:16,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-26 21:27:16,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-26 21:27:16,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-26 21:27:16,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-09-26 21:27:16,064 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-09-26 21:27:16,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:16,064 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-09-26 21:27:16,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:27:16,064 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-09-26 21:27:16,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-26 21:27:16,064 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:16,064 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1] [2018-09-26 21:27:16,065 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:16,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:16,065 INFO L82 PathProgramCache]: Analyzing trace with hash 35497837, now seen corresponding path program 30 times [2018-09-26 21:27:16,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:16,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:16,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:16,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:27:16,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:16,598 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:16,599 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:16,599 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 [2018-09-26 21:27:16,607 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:27:16,655 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-09-26 21:27:16,656 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:27:16,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:16,729 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:16,729 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-09-26 21:27:16,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:27:16,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:27:16,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:27:16,730 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2018-09-26 21:27:17,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:17,144 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-09-26 21:27:17,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:27:17,145 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2018-09-26 21:27:17,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:17,146 INFO L225 Difference]: With dead ends: 77 [2018-09-26 21:27:17,146 INFO L226 Difference]: Without dead ends: 75 [2018-09-26 21:27:17,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=553, Invalid=929, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:27:17,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-26 21:27:17,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2018-09-26 21:27:17,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-26 21:27:17,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-09-26 21:27:17,156 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2018-09-26 21:27:17,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:17,157 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-09-26 21:27:17,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:27:17,157 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-09-26 21:27:17,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-26 21:27:17,157 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:17,157 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2018-09-26 21:27:17,158 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:17,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:17,158 INFO L82 PathProgramCache]: Analyzing trace with hash -246383767, now seen corresponding path program 31 times [2018-09-26 21:27:17,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:17,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:17,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:17,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:27:17,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:18,279 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:18,280 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:18,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:27:18,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:27:18,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:18,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:18,956 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:18,978 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:18,979 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2018-09-26 21:27:18,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-26 21:27:18,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-26 21:27:18,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=2092, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:27:18,980 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 53 states. [2018-09-26 21:27:20,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:20,254 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-09-26 21:27:20,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:27:20,255 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 70 [2018-09-26 21:27:20,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:20,255 INFO L225 Difference]: With dead ends: 110 [2018-09-26 21:27:20,255 INFO L226 Difference]: Without dead ends: 73 [2018-09-26 21:27:20,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1157, Invalid=3673, Unknown=0, NotChecked=0, Total=4830 [2018-09-26 21:27:20,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-26 21:27:20,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-26 21:27:20,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-26 21:27:20,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-09-26 21:27:20,267 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2018-09-26 21:27:20,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:20,267 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-09-26 21:27:20,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-26 21:27:20,267 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-09-26 21:27:20,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-26 21:27:20,267 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:20,268 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1] [2018-09-26 21:27:20,268 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:20,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:20,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1653283491, now seen corresponding path program 32 times [2018-09-26 21:27:20,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:20,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:20,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:20,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:27:20,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:20,549 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:20,549 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 [2018-09-26 21:27:20,556 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:27:20,599 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:27:20,599 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:27:20,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:20,628 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:20,648 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:20,648 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2018-09-26 21:27:20,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:27:20,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:27:20,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:27:20,649 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 23 states. [2018-09-26 21:27:20,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:20,965 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-09-26 21:27:20,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:27:20,966 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2018-09-26 21:27:20,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:20,967 INFO L225 Difference]: With dead ends: 81 [2018-09-26 21:27:20,967 INFO L226 Difference]: Without dead ends: 79 [2018-09-26 21:27:20,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=612, Invalid=1028, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:27:20,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-26 21:27:20,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2018-09-26 21:27:20,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-26 21:27:20,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-09-26 21:27:20,978 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-09-26 21:27:20,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:20,979 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-09-26 21:27:20,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:27:20,979 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-09-26 21:27:20,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-26 21:27:20,979 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:20,979 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-09-26 21:27:20,979 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:20,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:20,980 INFO L82 PathProgramCache]: Analyzing trace with hash -332531425, now seen corresponding path program 33 times [2018-09-26 21:27:20,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:20,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:20,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:20,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:27:20,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:20,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:21,470 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:21,471 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:21,471 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 [2018-09-26 21:27:21,478 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:27:21,532 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-26 21:27:21,532 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:27:21,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:22,460 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:22,480 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:22,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 55 [2018-09-26 21:27:22,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-26 21:27:22,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-26 21:27:22,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=739, Invalid=2341, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:27:22,482 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 56 states. [2018-09-26 21:27:23,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:23,480 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-09-26 21:27:23,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:27:23,480 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 74 [2018-09-26 21:27:23,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:23,481 INFO L225 Difference]: With dead ends: 116 [2018-09-26 21:27:23,481 INFO L226 Difference]: Without dead ends: 77 [2018-09-26 21:27:23,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1288, Invalid=4114, Unknown=0, NotChecked=0, Total=5402 [2018-09-26 21:27:23,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-26 21:27:23,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-26 21:27:23,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-26 21:27:23,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-09-26 21:27:23,492 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2018-09-26 21:27:23,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:23,492 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-09-26 21:27:23,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-26 21:27:23,493 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-09-26 21:27:23,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-26 21:27:23,493 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:23,493 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1] [2018-09-26 21:27:23,493 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:23,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:23,494 INFO L82 PathProgramCache]: Analyzing trace with hash -198022311, now seen corresponding path program 34 times [2018-09-26 21:27:23,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:23,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:23,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:23,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:27:23,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:23,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:24,035 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:24,035 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 [2018-09-26 21:27:24,042 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:27:24,086 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:27:24,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:27:24,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:24,151 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:24,171 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:24,171 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-09-26 21:27:24,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:27:24,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:27:24,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:27:24,172 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2018-09-26 21:27:24,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:24,508 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-09-26 21:27:24,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:27:24,509 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2018-09-26 21:27:24,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:24,510 INFO L225 Difference]: With dead ends: 85 [2018-09-26 21:27:24,510 INFO L226 Difference]: Without dead ends: 83 [2018-09-26 21:27:24,511 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=674, Invalid=1132, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:27:24,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-26 21:27:24,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-09-26 21:27:24,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-26 21:27:24,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-09-26 21:27:24,522 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2018-09-26 21:27:24,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:24,523 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-09-26 21:27:24,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:27:24,523 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-09-26 21:27:24,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-26 21:27:24,523 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:24,523 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2018-09-26 21:27:24,523 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:24,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:24,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1320946603, now seen corresponding path program 35 times [2018-09-26 21:27:24,524 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:24,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:24,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:24,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:27:24,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:24,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:25,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:25,193 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 [2018-09-26 21:27:25,201 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:27:25,253 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-26 21:27:25,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:27:25,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:27,251 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:27,271 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:27,271 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 58 [2018-09-26 21:27:27,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-26 21:27:27,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-26 21:27:27,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=2604, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:27:27,272 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 59 states. [2018-09-26 21:27:28,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:28,194 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-09-26 21:27:28,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-26 21:27:28,194 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 78 [2018-09-26 21:27:28,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:28,195 INFO L225 Difference]: With dead ends: 122 [2018-09-26 21:27:28,196 INFO L226 Difference]: Without dead ends: 81 [2018-09-26 21:27:28,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1426, Invalid=4580, Unknown=0, NotChecked=0, Total=6006 [2018-09-26 21:27:28,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-26 21:27:28,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-26 21:27:28,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-26 21:27:28,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-09-26 21:27:28,206 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2018-09-26 21:27:28,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:28,207 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-09-26 21:27:28,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-26 21:27:28,207 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-09-26 21:27:28,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-26 21:27:28,207 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:28,207 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1] [2018-09-26 21:27:28,208 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:28,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:28,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1626388879, now seen corresponding path program 36 times [2018-09-26 21:27:28,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:28,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:28,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:28,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:27:28,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:28,854 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:28,855 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:28,855 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:27:28,862 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:27:28,923 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-26 21:27:28,923 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:27:28,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:28,969 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:28,989 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:28,990 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2018-09-26 21:27:28,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-26 21:27:28,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-26 21:27:28,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:27:28,990 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 25 states. [2018-09-26 21:27:29,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:29,383 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-09-26 21:27:29,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:27:29,384 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2018-09-26 21:27:29,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:29,384 INFO L225 Difference]: With dead ends: 89 [2018-09-26 21:27:29,384 INFO L226 Difference]: Without dead ends: 87 [2018-09-26 21:27:29,385 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 [2018-09-26 21:27:29,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-26 21:27:29,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2018-09-26 21:27:29,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-26 21:27:29,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-09-26 21:27:29,400 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2018-09-26 21:27:29,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:29,400 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-09-26 21:27:29,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-26 21:27:29,400 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-09-26 21:27:29,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-26 21:27:29,401 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:29,401 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-09-26 21:27:29,401 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:29,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:29,401 INFO L82 PathProgramCache]: Analyzing trace with hash -408449781, now seen corresponding path program 37 times [2018-09-26 21:27:29,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:29,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:29,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:29,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:27:29,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:29,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:30,109 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:30,109 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:30,110 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 [2018-09-26 21:27:30,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:27:30,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:30,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:30,866 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:30,886 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:30,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 61 [2018-09-26 21:27:30,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-26 21:27:30,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-26 21:27:30,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2881, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:27:30,888 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 62 states. [2018-09-26 21:27:31,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:31,803 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-09-26 21:27:31,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:27:31,804 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 82 [2018-09-26 21:27:31,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:31,804 INFO L225 Difference]: With dead ends: 128 [2018-09-26 21:27:31,804 INFO L226 Difference]: Without dead ends: 85 [2018-09-26 21:27:31,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1292 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1571, Invalid=5071, Unknown=0, NotChecked=0, Total=6642 [2018-09-26 21:27:31,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-26 21:27:31,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-26 21:27:31,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-26 21:27:31,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-09-26 21:27:31,816 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2018-09-26 21:27:31,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:31,817 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-09-26 21:27:31,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-26 21:27:31,817 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-09-26 21:27:31,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-26 21:27:31,817 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:31,817 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1] [2018-09-26 21:27:31,818 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:31,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:31,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1130683067, now seen corresponding path program 38 times [2018-09-26 21:27:31,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:31,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:31,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:31,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:27:31,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:31,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:32,243 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:32,243 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:27:32,251 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:27:32,299 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:27:32,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:27:32,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:32,372 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:32,372 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-09-26 21:27:32,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:27:32,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:27:32,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:27:32,373 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2018-09-26 21:27:32,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:32,764 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-09-26 21:27:32,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-26 21:27:32,764 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2018-09-26 21:27:32,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:32,765 INFO L225 Difference]: With dead ends: 93 [2018-09-26 21:27:32,766 INFO L226 Difference]: Without dead ends: 91 [2018-09-26 21:27:32,766 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 [2018-09-26 21:27:32,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-26 21:27:32,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2018-09-26 21:27:32,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-26 21:27:32,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-09-26 21:27:32,781 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2018-09-26 21:27:32,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:32,781 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-09-26 21:27:32,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:27:32,781 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-09-26 21:27:32,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-26 21:27:32,782 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:32,782 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2018-09-26 21:27:32,782 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:32,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:32,782 INFO L82 PathProgramCache]: Analyzing trace with hash 40231745, now seen corresponding path program 39 times [2018-09-26 21:27:32,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:32,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:32,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:32,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:27:32,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:33,464 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:33,464 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:33,464 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:27:33,473 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:27:33,535 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-26 21:27:33,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:27:33,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:34,349 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:34,369 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:34,369 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2018-09-26 21:27:34,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-26 21:27:34,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-26 21:27:34,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=988, Invalid=3172, Unknown=0, NotChecked=0, Total=4160 [2018-09-26 21:27:34,371 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 65 states. [2018-09-26 21:27:35,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:35,542 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-09-26 21:27:35,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-26 21:27:35,542 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 86 [2018-09-26 21:27:35,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:35,542 INFO L225 Difference]: With dead ends: 134 [2018-09-26 21:27:35,542 INFO L226 Difference]: Without dead ends: 89 [2018-09-26 21:27:35,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1723, Invalid=5587, Unknown=0, NotChecked=0, Total=7310 [2018-09-26 21:27:35,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-26 21:27:35,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-26 21:27:35,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-26 21:27:35,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-09-26 21:27:35,560 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2018-09-26 21:27:35,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:35,560 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-09-26 21:27:35,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-26 21:27:35,560 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-09-26 21:27:35,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-26 21:27:35,561 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:35,561 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1] [2018-09-26 21:27:35,561 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:35,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:35,561 INFO L82 PathProgramCache]: Analyzing trace with hash -2030121349, now seen corresponding path program 40 times [2018-09-26 21:27:35,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:35,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:35,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:35,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:27:35,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:35,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:36,017 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:36,017 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 [2018-09-26 21:27:36,027 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:27:36,078 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:27:36,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:27:36,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:36,153 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:36,153 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2018-09-26 21:27:36,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-26 21:27:36,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-26 21:27:36,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:27:36,154 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 27 states. [2018-09-26 21:27:36,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:36,598 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-09-26 21:27:36,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:27:36,599 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 88 [2018-09-26 21:27:36,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:36,600 INFO L225 Difference]: With dead ends: 97 [2018-09-26 21:27:36,600 INFO L226 Difference]: Without dead ends: 95 [2018-09-26 21:27:36,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=878, Invalid=1474, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:27:36,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-26 21:27:36,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2018-09-26 21:27:36,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-26 21:27:36,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-09-26 21:27:36,616 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2018-09-26 21:27:36,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:36,617 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-09-26 21:27:36,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-26 21:27:36,617 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-09-26 21:27:36,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-26 21:27:36,617 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:36,617 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-09-26 21:27:36,617 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:36,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:36,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1031530761, now seen corresponding path program 41 times [2018-09-26 21:27:36,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:36,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:36,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:36,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:27:36,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:36,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:37,751 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:37,751 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:37,751 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 [2018-09-26 21:27:37,758 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:27:37,819 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-26 21:27:37,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:27:37,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:38,648 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:38,648 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 67 [2018-09-26 21:27:38,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-26 21:27:38,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-26 21:27:38,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1079, Invalid=3477, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:27:38,650 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 68 states. [2018-09-26 21:27:39,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:39,729 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-09-26 21:27:39,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-26 21:27:39,730 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 90 [2018-09-26 21:27:39,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:39,730 INFO L225 Difference]: With dead ends: 140 [2018-09-26 21:27:39,730 INFO L226 Difference]: Without dead ends: 93 [2018-09-26 21:27:39,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1882, Invalid=6128, Unknown=0, NotChecked=0, Total=8010 [2018-09-26 21:27:39,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-26 21:27:39,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-26 21:27:39,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-26 21:27:39,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-09-26 21:27:39,744 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-09-26 21:27:39,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:39,744 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-09-26 21:27:39,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-26 21:27:39,745 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-09-26 21:27:39,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-26 21:27:39,745 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:39,745 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1] [2018-09-26 21:27:39,745 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:39,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:39,746 INFO L82 PathProgramCache]: Analyzing trace with hash 769709361, now seen corresponding path program 42 times [2018-09-26 21:27:39,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:39,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:39,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:39,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:27:39,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:39,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:40,267 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:40,267 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:40,267 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 [2018-09-26 21:27:40,275 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:27:40,342 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-09-26 21:27:40,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:27:40,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:40,406 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:40,426 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:40,426 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-09-26 21:27:40,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:27:40,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:27:40,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:27:40,427 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2018-09-26 21:27:40,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:40,850 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-09-26 21:27:40,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:27:40,850 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2018-09-26 21:27:40,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:40,851 INFO L225 Difference]: With dead ends: 101 [2018-09-26 21:27:40,851 INFO L226 Difference]: Without dead ends: 99 [2018-09-26 21:27:40,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=952, Invalid=1598, Unknown=0, NotChecked=0, Total=2550 [2018-09-26 21:27:40,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-26 21:27:40,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-09-26 21:27:40,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-26 21:27:40,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-09-26 21:27:40,865 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2018-09-26 21:27:40,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:40,866 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-09-26 21:27:40,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:27:40,866 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-09-26 21:27:40,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-26 21:27:40,866 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:40,867 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2018-09-26 21:27:40,867 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:40,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:40,867 INFO L82 PathProgramCache]: Analyzing trace with hash 956254253, now seen corresponding path program 43 times [2018-09-26 21:27:40,867 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:40,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:40,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:40,868 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:27:40,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:40,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:41,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:41,710 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:41,710 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:27:41,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:27:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:41,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:42,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:42,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 70 [2018-09-26 21:27:42,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-26 21:27:42,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-26 21:27:42,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1174, Invalid=3796, Unknown=0, NotChecked=0, Total=4970 [2018-09-26 21:27:42,996 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 71 states. [2018-09-26 21:27:44,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:44,193 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-09-26 21:27:44,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-26 21:27:44,193 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 94 [2018-09-26 21:27:44,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:44,194 INFO L225 Difference]: With dead ends: 146 [2018-09-26 21:27:44,194 INFO L226 Difference]: Without dead ends: 97 [2018-09-26 21:27:44,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2048, Invalid=6694, Unknown=0, NotChecked=0, Total=8742 [2018-09-26 21:27:44,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-26 21:27:44,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-26 21:27:44,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-26 21:27:44,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-09-26 21:27:44,208 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2018-09-26 21:27:44,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:44,208 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-09-26 21:27:44,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-26 21:27:44,209 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-09-26 21:27:44,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-26 21:27:44,209 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:44,209 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1] [2018-09-26 21:27:44,209 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:44,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:44,210 INFO L82 PathProgramCache]: Analyzing trace with hash 251550055, now seen corresponding path program 44 times [2018-09-26 21:27:44,210 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:44,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:44,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:44,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:27:44,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:44,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:44,605 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:44,605 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:27:44,613 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:27:44,668 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:27:44,668 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:27:44,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:44,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:44,764 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:44,764 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2018-09-26 21:27:44,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:27:44,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:27:44,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:27:44,765 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 29 states. [2018-09-26 21:27:45,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:45,256 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-09-26 21:27:45,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:27:45,257 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 96 [2018-09-26 21:27:45,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:45,258 INFO L225 Difference]: With dead ends: 105 [2018-09-26 21:27:45,258 INFO L226 Difference]: Without dead ends: 103 [2018-09-26 21:27:45,258 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1029, Invalid=1727, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:27:45,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-26 21:27:45,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-09-26 21:27:45,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-26 21:27:45,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-09-26 21:27:45,274 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-09-26 21:27:45,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:45,274 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-09-26 21:27:45,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:27:45,274 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-09-26 21:27:45,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-26 21:27:45,275 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:45,275 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-09-26 21:27:45,275 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:45,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:45,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1221367523, now seen corresponding path program 45 times [2018-09-26 21:27:45,276 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:45,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:45,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:45,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:27:45,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:45,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:46,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:46,401 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:46,401 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:27:46,411 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:27:46,483 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-26 21:27:46,483 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:27:46,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:48,808 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:48,808 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 73 [2018-09-26 21:27:48,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-26 21:27:48,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-26 21:27:48,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1273, Invalid=4129, Unknown=0, NotChecked=0, Total=5402 [2018-09-26 21:27:48,809 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 74 states. [2018-09-26 21:27:50,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:50,872 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-09-26 21:27:50,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:27:50,872 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 98 [2018-09-26 21:27:50,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:50,873 INFO L225 Difference]: With dead ends: 152 [2018-09-26 21:27:50,873 INFO L226 Difference]: Without dead ends: 101 [2018-09-26 21:27:50,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1886 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2221, Invalid=7285, Unknown=0, NotChecked=0, Total=9506 [2018-09-26 21:27:50,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-26 21:27:50,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-26 21:27:50,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-26 21:27:50,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-09-26 21:27:50,891 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2018-09-26 21:27:50,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:50,891 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-09-26 21:27:50,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-26 21:27:50,891 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-09-26 21:27:50,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-26 21:27:50,892 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:50,892 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1] [2018-09-26 21:27:50,892 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:50,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:50,892 INFO L82 PathProgramCache]: Analyzing trace with hash -99845347, now seen corresponding path program 46 times [2018-09-26 21:27:50,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:50,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:50,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:50,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:27:50,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:50,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:51,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:51,720 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:51,720 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 [2018-09-26 21:27:51,728 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:27:51,789 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:27:51,789 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:27:51,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:51,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:51,863 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:51,863 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-09-26 21:27:51,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:27:51,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:27:51,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:27:51,864 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2018-09-26 21:27:52,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:52,344 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-09-26 21:27:52,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:27:52,345 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2018-09-26 21:27:52,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:52,345 INFO L225 Difference]: With dead ends: 109 [2018-09-26 21:27:52,345 INFO L226 Difference]: Without dead ends: 107 [2018-09-26 21:27:52,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1109, Invalid=1861, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:27:52,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-26 21:27:52,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2018-09-26 21:27:52,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-26 21:27:52,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-09-26 21:27:52,367 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2018-09-26 21:27:52,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:52,368 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-09-26 21:27:52,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:27:52,368 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-09-26 21:27:52,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-26 21:27:52,368 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:52,368 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2018-09-26 21:27:52,369 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:52,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:52,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1462164711, now seen corresponding path program 47 times [2018-09-26 21:27:52,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:52,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:52,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:52,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:27:52,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:52,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:53,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:53,729 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:53,729 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:27:53,736 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:27:53,823 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-26 21:27:53,823 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:27:53,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:54,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:54,848 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:54,848 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 76 [2018-09-26 21:27:54,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-26 21:27:54,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-26 21:27:54,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1376, Invalid=4476, Unknown=0, NotChecked=0, Total=5852 [2018-09-26 21:27:54,849 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 77 states. [2018-09-26 21:27:56,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:56,273 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-09-26 21:27:56,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-26 21:27:56,273 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 102 [2018-09-26 21:27:56,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:56,274 INFO L225 Difference]: With dead ends: 158 [2018-09-26 21:27:56,274 INFO L226 Difference]: Without dead ends: 105 [2018-09-26 21:27:56,275 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2052 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2401, Invalid=7901, Unknown=0, NotChecked=0, Total=10302 [2018-09-26 21:27:56,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-26 21:27:56,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-26 21:27:56,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-26 21:27:56,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-09-26 21:27:56,297 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2018-09-26 21:27:56,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:56,298 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-09-26 21:27:56,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-26 21:27:56,298 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-09-26 21:27:56,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-26 21:27:56,298 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:56,299 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1] [2018-09-26 21:27:56,299 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:56,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:56,299 INFO L82 PathProgramCache]: Analyzing trace with hash 850942547, now seen corresponding path program 48 times [2018-09-26 21:27:56,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:56,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:56,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:56,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:27:56,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:56,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:57,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:57,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:57,051 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 [2018-09-26 21:27:57,058 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:27:57,138 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-26 21:27:57,138 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:27:57,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:27:57,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:57,212 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:27:57,212 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2018-09-26 21:27:57,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-26 21:27:57,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-26 21:27:57,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:27:57,213 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 31 states. [2018-09-26 21:27:57,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:27:57,890 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-09-26 21:27:57,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:27:57,890 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 104 [2018-09-26 21:27:57,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:27:57,891 INFO L225 Difference]: With dead ends: 113 [2018-09-26 21:27:57,891 INFO L226 Difference]: Without dead ends: 111 [2018-09-26 21:27:57,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1192, Invalid=2000, Unknown=0, NotChecked=0, Total=3192 [2018-09-26 21:27:57,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-26 21:27:57,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2018-09-26 21:27:57,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-26 21:27:57,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-09-26 21:27:57,912 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2018-09-26 21:27:57,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:27:57,912 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-09-26 21:27:57,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-26 21:27:57,912 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-09-26 21:27:57,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-26 21:27:57,913 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:27:57,913 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-09-26 21:27:57,913 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:27:57,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:27:57,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1711934671, now seen corresponding path program 49 times [2018-09-26 21:27:57,914 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:27:57,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:27:57,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:57,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:27:57,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:27:57,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:59,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:27:59,441 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:27:59,441 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:27:59,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:27:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:27:59,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:00,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:00,713 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:00,713 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 79 [2018-09-26 21:28:00,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-26 21:28:00,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-26 21:28:00,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1483, Invalid=4837, Unknown=0, NotChecked=0, Total=6320 [2018-09-26 21:28:00,714 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 80 states. [2018-09-26 21:28:02,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:02,262 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-09-26 21:28:02,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-26 21:28:02,262 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 106 [2018-09-26 21:28:02,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:02,263 INFO L225 Difference]: With dead ends: 164 [2018-09-26 21:28:02,263 INFO L226 Difference]: Without dead ends: 109 [2018-09-26 21:28:02,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2588, Invalid=8542, Unknown=0, NotChecked=0, Total=11130 [2018-09-26 21:28:02,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-26 21:28:02,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-26 21:28:02,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-26 21:28:02,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-09-26 21:28:02,281 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2018-09-26 21:28:02,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:02,281 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-09-26 21:28:02,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-26 21:28:02,281 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-09-26 21:28:02,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-26 21:28:02,282 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:02,282 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1] [2018-09-26 21:28:02,282 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:02,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:02,282 INFO L82 PathProgramCache]: Analyzing trace with hash -223930615, now seen corresponding path program 50 times [2018-09-26 21:28:02,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:02,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:02,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:02,283 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:02,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:02,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:03,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:03,142 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:03,142 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 [2018-09-26 21:28:03,151 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:28:03,213 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:28:03,213 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:03,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:03,299 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:03,299 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-09-26 21:28:03,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:28:03,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:28:03,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:28:03,300 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2018-09-26 21:28:03,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:03,821 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-09-26 21:28:03,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-26 21:28:03,821 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2018-09-26 21:28:03,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:03,822 INFO L225 Difference]: With dead ends: 117 [2018-09-26 21:28:03,822 INFO L226 Difference]: Without dead ends: 115 [2018-09-26 21:28:03,822 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 [2018-09-26 21:28:03,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-26 21:28:03,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2018-09-26 21:28:03,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-26 21:28:03,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-09-26 21:28:03,840 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2018-09-26 21:28:03,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:03,841 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-09-26 21:28:03,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:28:03,841 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-09-26 21:28:03,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-26 21:28:03,842 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:03,842 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2018-09-26 21:28:03,842 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:03,842 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:03,842 INFO L82 PathProgramCache]: Analyzing trace with hash -449022971, now seen corresponding path program 51 times [2018-09-26 21:28:03,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:03,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:03,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:03,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:03,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:05,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:05,105 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:05,105 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 [2018-09-26 21:28:05,115 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:28:05,199 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-26 21:28:05,200 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:05,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:06,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:06,498 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:06,499 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 82 [2018-09-26 21:28:06,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-26 21:28:06,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-26 21:28:06,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1594, Invalid=5212, Unknown=0, NotChecked=0, Total=6806 [2018-09-26 21:28:06,500 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 83 states. [2018-09-26 21:28:08,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:08,038 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-09-26 21:28:08,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-26 21:28:08,039 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 110 [2018-09-26 21:28:08,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:08,039 INFO L225 Difference]: With dead ends: 170 [2018-09-26 21:28:08,039 INFO L226 Difference]: Without dead ends: 113 [2018-09-26 21:28:08,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2405 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2782, Invalid=9208, Unknown=0, NotChecked=0, Total=11990 [2018-09-26 21:28:08,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-26 21:28:08,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-26 21:28:08,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-26 21:28:08,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-09-26 21:28:08,062 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2018-09-26 21:28:08,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:08,062 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-09-26 21:28:08,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-26 21:28:08,062 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-09-26 21:28:08,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-26 21:28:08,062 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:08,062 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1] [2018-09-26 21:28:08,063 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:08,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:08,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1802883391, now seen corresponding path program 52 times [2018-09-26 21:28:08,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:08,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:08,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:08,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:08,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:08,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:08,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:08,616 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:08,616 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:08,623 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:28:08,684 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:28:08,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:08,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:08,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:08,938 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:08,938 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2018-09-26 21:28:08,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-26 21:28:08,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-26 21:28:08,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:28:08,939 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 33 states. [2018-09-26 21:28:09,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:09,574 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-09-26 21:28:09,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-26 21:28:09,574 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 112 [2018-09-26 21:28:09,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:09,575 INFO L225 Difference]: With dead ends: 121 [2018-09-26 21:28:09,575 INFO L226 Difference]: Without dead ends: 119 [2018-09-26 21:28:09,576 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 [2018-09-26 21:28:09,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-26 21:28:09,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2018-09-26 21:28:09,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-26 21:28:09,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-09-26 21:28:09,595 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2018-09-26 21:28:09,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:09,595 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-09-26 21:28:09,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-26 21:28:09,595 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-09-26 21:28:09,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-26 21:28:09,595 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:09,596 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-09-26 21:28:09,596 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:09,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:09,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1699051707, now seen corresponding path program 53 times [2018-09-26 21:28:09,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:09,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:09,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:09,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:09,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:10,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:10,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:10,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:10,654 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:28:10,739 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-26 21:28:10,739 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:10,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:12,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:12,110 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:12,110 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 85 [2018-09-26 21:28:12,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-26 21:28:12,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-26 21:28:12,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1709, Invalid=5601, Unknown=0, NotChecked=0, Total=7310 [2018-09-26 21:28:12,112 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 86 states. [2018-09-26 21:28:13,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:13,617 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-09-26 21:28:13,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-26 21:28:13,618 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 114 [2018-09-26 21:28:13,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:13,618 INFO L225 Difference]: With dead ends: 176 [2018-09-26 21:28:13,618 INFO L226 Difference]: Without dead ends: 117 [2018-09-26 21:28:13,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2592 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2983, Invalid=9899, Unknown=0, NotChecked=0, Total=12882 [2018-09-26 21:28:13,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-26 21:28:13,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-26 21:28:13,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-26 21:28:13,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-09-26 21:28:13,641 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-09-26 21:28:13,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:13,641 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-09-26 21:28:13,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-26 21:28:13,641 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-09-26 21:28:13,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-26 21:28:13,642 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:13,642 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1] [2018-09-26 21:28:13,642 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:13,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:13,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1220126965, now seen corresponding path program 54 times [2018-09-26 21:28:13,643 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:13,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:13,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:13,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:13,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:14,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:14,127 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:14,127 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 [2018-09-26 21:28:14,135 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:28:14,224 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-09-26 21:28:14,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:14,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:14,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:14,609 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:14,609 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-09-26 21:28:14,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:28:14,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:28:14,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:28:14,610 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2018-09-26 21:28:15,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:15,173 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2018-09-26 21:28:15,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-26 21:28:15,173 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2018-09-26 21:28:15,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:15,174 INFO L225 Difference]: With dead ends: 125 [2018-09-26 21:28:15,174 INFO L226 Difference]: Without dead ends: 123 [2018-09-26 21:28:15,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1459, Invalid=2447, Unknown=0, NotChecked=0, Total=3906 [2018-09-26 21:28:15,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-26 21:28:15,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-09-26 21:28:15,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-26 21:28:15,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-09-26 21:28:15,201 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2018-09-26 21:28:15,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:15,201 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-09-26 21:28:15,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:28:15,201 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-09-26 21:28:15,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-26 21:28:15,202 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:15,202 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1] [2018-09-26 21:28:15,202 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:15,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:15,202 INFO L82 PathProgramCache]: Analyzing trace with hash 15874801, now seen corresponding path program 55 times [2018-09-26 21:28:15,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:15,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:15,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:15,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:15,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:15,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:16,417 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:16,417 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:16,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:16,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:16,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:18,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:18,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:18,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 88 [2018-09-26 21:28:18,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-26 21:28:18,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-26 21:28:18,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1828, Invalid=6004, Unknown=0, NotChecked=0, Total=7832 [2018-09-26 21:28:18,918 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 89 states. [2018-09-26 21:28:20,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:20,849 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2018-09-26 21:28:20,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-26 21:28:20,849 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 118 [2018-09-26 21:28:20,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:20,850 INFO L225 Difference]: With dead ends: 182 [2018-09-26 21:28:20,850 INFO L226 Difference]: Without dead ends: 121 [2018-09-26 21:28:20,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2786 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3191, Invalid=10615, Unknown=0, NotChecked=0, Total=13806 [2018-09-26 21:28:20,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-26 21:28:20,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-26 21:28:20,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-26 21:28:20,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-09-26 21:28:20,871 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2018-09-26 21:28:20,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:20,871 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-09-26 21:28:20,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-26 21:28:20,871 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-09-26 21:28:20,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-26 21:28:20,871 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:20,872 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1] [2018-09-26 21:28:20,872 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:20,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:20,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1308639701, now seen corresponding path program 56 times [2018-09-26 21:28:20,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:20,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:20,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:20,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:20,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:20,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:21,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:21,386 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:21,386 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 [2018-09-26 21:28:21,393 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:28:21,467 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:28:21,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:21,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:21,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:21,677 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:21,677 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2018-09-26 21:28:21,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-26 21:28:21,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-26 21:28:21,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:28:21,678 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 35 states. [2018-09-26 21:28:22,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:22,290 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2018-09-26 21:28:22,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-26 21:28:22,290 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 120 [2018-09-26 21:28:22,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:22,291 INFO L225 Difference]: With dead ends: 129 [2018-09-26 21:28:22,291 INFO L226 Difference]: Without dead ends: 127 [2018-09-26 21:28:22,292 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1554, Invalid=2606, Unknown=0, NotChecked=0, Total=4160 [2018-09-26 21:28:22,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-26 21:28:22,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2018-09-26 21:28:22,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-26 21:28:22,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-09-26 21:28:22,316 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-09-26 21:28:22,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:22,316 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-09-26 21:28:22,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-26 21:28:22,316 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-09-26 21:28:22,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-26 21:28:22,317 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:22,317 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-09-26 21:28:22,317 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:22,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:22,317 INFO L82 PathProgramCache]: Analyzing trace with hash 822598311, now seen corresponding path program 57 times [2018-09-26 21:28:22,317 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:22,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:22,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:22,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:22,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:22,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:23,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:23,751 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:23,751 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 [2018-09-26 21:28:23,777 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:28:23,876 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-26 21:28:23,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:23,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:25,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:25,375 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:25,375 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 91 [2018-09-26 21:28:25,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-26 21:28:25,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-26 21:28:25,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1951, Invalid=6421, Unknown=0, NotChecked=0, Total=8372 [2018-09-26 21:28:25,376 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 92 states. [2018-09-26 21:28:27,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:27,351 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2018-09-26 21:28:27,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-26 21:28:27,351 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 122 [2018-09-26 21:28:27,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:27,352 INFO L225 Difference]: With dead ends: 188 [2018-09-26 21:28:27,352 INFO L226 Difference]: Without dead ends: 125 [2018-09-26 21:28:27,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2987 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3406, Invalid=11356, Unknown=0, NotChecked=0, Total=14762 [2018-09-26 21:28:27,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-26 21:28:27,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-26 21:28:27,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-26 21:28:27,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-09-26 21:28:27,378 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2018-09-26 21:28:27,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:27,378 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-09-26 21:28:27,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-26 21:28:27,378 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-09-26 21:28:27,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-26 21:28:27,379 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:27,379 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1] [2018-09-26 21:28:27,379 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:27,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:27,379 INFO L82 PathProgramCache]: Analyzing trace with hash -858967839, now seen corresponding path program 58 times [2018-09-26 21:28:27,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:27,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:27,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:27,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:27,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:27,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:27,860 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:27,860 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 [2018-09-26 21:28:27,870 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:28:27,943 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:28:27,943 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:27,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:28,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:28,022 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:28,023 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-09-26 21:28:28,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:28:28,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:28:28,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:28:28,024 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2018-09-26 21:28:28,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:28,834 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-09-26 21:28:28,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-26 21:28:28,834 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2018-09-26 21:28:28,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:28,835 INFO L225 Difference]: With dead ends: 133 [2018-09-26 21:28:28,835 INFO L226 Difference]: Without dead ends: 131 [2018-09-26 21:28:28,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1652, Invalid=2770, Unknown=0, NotChecked=0, Total=4422 [2018-09-26 21:28:28,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-26 21:28:28,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2018-09-26 21:28:28,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-26 21:28:28,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-09-26 21:28:28,858 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2018-09-26 21:28:28,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:28,859 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-09-26 21:28:28,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:28:28,859 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-09-26 21:28:28,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-26 21:28:28,859 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:28,859 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1] [2018-09-26 21:28:28,860 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:28,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:28,860 INFO L82 PathProgramCache]: Analyzing trace with hash -834439203, now seen corresponding path program 59 times [2018-09-26 21:28:28,860 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:28,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:28,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:28,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:28,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:28,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:30,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:30,366 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:30,366 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 [2018-09-26 21:28:30,373 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:28:30,473 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-26 21:28:30,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:30,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:31,998 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:31,998 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 94 [2018-09-26 21:28:31,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-26 21:28:31,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-26 21:28:31,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2078, Invalid=6852, Unknown=0, NotChecked=0, Total=8930 [2018-09-26 21:28:31,999 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 95 states. [2018-09-26 21:28:33,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:33,855 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2018-09-26 21:28:33,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-26 21:28:33,855 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 126 [2018-09-26 21:28:33,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:33,856 INFO L225 Difference]: With dead ends: 194 [2018-09-26 21:28:33,856 INFO L226 Difference]: Without dead ends: 129 [2018-09-26 21:28:33,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3195 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3628, Invalid=12122, Unknown=0, NotChecked=0, Total=15750 [2018-09-26 21:28:33,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-26 21:28:33,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-26 21:28:33,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-26 21:28:33,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-09-26 21:28:33,881 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2018-09-26 21:28:33,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:33,881 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-09-26 21:28:33,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-26 21:28:33,881 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-09-26 21:28:33,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-26 21:28:33,882 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:33,882 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1] [2018-09-26 21:28:33,882 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:33,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:33,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1096867561, now seen corresponding path program 60 times [2018-09-26 21:28:33,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:33,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:33,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:33,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:33,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:34,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:34,659 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:34,659 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:34,666 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:28:34,768 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-09-26 21:28:34,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:34,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:34,904 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:34,904 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2018-09-26 21:28:34,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-26 21:28:34,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-26 21:28:34,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:28:34,905 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 37 states. [2018-09-26 21:28:35,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:35,587 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2018-09-26 21:28:35,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-26 21:28:35,587 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 128 [2018-09-26 21:28:35,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:35,588 INFO L225 Difference]: With dead ends: 137 [2018-09-26 21:28:35,588 INFO L226 Difference]: Without dead ends: 135 [2018-09-26 21:28:35,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1753, Invalid=2939, Unknown=0, NotChecked=0, Total=4692 [2018-09-26 21:28:35,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-26 21:28:35,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2018-09-26 21:28:35,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-26 21:28:35,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-09-26 21:28:35,612 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2018-09-26 21:28:35,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:35,612 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-09-26 21:28:35,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-26 21:28:35,612 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-09-26 21:28:35,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-26 21:28:35,612 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:35,613 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-09-26 21:28:35,613 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:35,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:35,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1822805357, now seen corresponding path program 61 times [2018-09-26 21:28:35,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:35,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:35,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:35,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:35,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:36,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:36,964 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:36,964 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-26 21:28:36,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:37,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:37,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:38,991 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:38,991 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 97 [2018-09-26 21:28:38,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-26 21:28:38,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-26 21:28:38,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2209, Invalid=7297, Unknown=0, NotChecked=0, Total=9506 [2018-09-26 21:28:38,993 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 98 states. [2018-09-26 21:28:41,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:41,057 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2018-09-26 21:28:41,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-26 21:28:41,057 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 130 [2018-09-26 21:28:41,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:41,057 INFO L225 Difference]: With dead ends: 200 [2018-09-26 21:28:41,057 INFO L226 Difference]: Without dead ends: 133 [2018-09-26 21:28:41,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3410 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3857, Invalid=12913, Unknown=0, NotChecked=0, Total=16770 [2018-09-26 21:28:41,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-26 21:28:41,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-26 21:28:41,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-26 21:28:41,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-09-26 21:28:41,097 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2018-09-26 21:28:41,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:41,097 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-09-26 21:28:41,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-26 21:28:41,097 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-09-26 21:28:41,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-26 21:28:41,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:41,098 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1] [2018-09-26 21:28:41,098 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:41,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:41,098 INFO L82 PathProgramCache]: Analyzing trace with hash 787132109, now seen corresponding path program 62 times [2018-09-26 21:28:41,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:41,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:41,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:41,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:41,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:41,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:41,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:41,767 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:41,767 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 [2018-09-26 21:28:41,774 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:28:41,856 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:28:41,857 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:41,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:42,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:42,043 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:42,044 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-09-26 21:28:42,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:28:42,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:28:42,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:28:42,045 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2018-09-26 21:28:42,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:42,791 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2018-09-26 21:28:42,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-26 21:28:42,792 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2018-09-26 21:28:42,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:42,792 INFO L225 Difference]: With dead ends: 141 [2018-09-26 21:28:42,793 INFO L226 Difference]: Without dead ends: 139 [2018-09-26 21:28:42,793 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1857, Invalid=3113, Unknown=0, NotChecked=0, Total=4970 [2018-09-26 21:28:42,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-26 21:28:42,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-09-26 21:28:42,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-26 21:28:42,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-09-26 21:28:42,818 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2018-09-26 21:28:42,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:42,819 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-09-26 21:28:42,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:28:42,819 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-09-26 21:28:42,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-26 21:28:42,820 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:42,820 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1] [2018-09-26 21:28:42,820 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:42,820 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:42,820 INFO L82 PathProgramCache]: Analyzing trace with hash 519645897, now seen corresponding path program 63 times [2018-09-26 21:28:42,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:42,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:42,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:42,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:42,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:44,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:44,374 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:44,374 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:44,384 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:28:44,498 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-26 21:28:44,499 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:44,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:46,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:46,262 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:46,263 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 100 [2018-09-26 21:28:46,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-26 21:28:46,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-26 21:28:46,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2344, Invalid=7756, Unknown=0, NotChecked=0, Total=10100 [2018-09-26 21:28:46,264 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 101 states. [2018-09-26 21:28:48,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:48,814 INFO L93 Difference]: Finished difference Result 206 states and 208 transitions. [2018-09-26 21:28:48,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-26 21:28:48,814 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 134 [2018-09-26 21:28:48,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:48,815 INFO L225 Difference]: With dead ends: 206 [2018-09-26 21:28:48,815 INFO L226 Difference]: Without dead ends: 137 [2018-09-26 21:28:48,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3632 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4093, Invalid=13729, Unknown=0, NotChecked=0, Total=17822 [2018-09-26 21:28:48,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-26 21:28:48,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-26 21:28:48,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-26 21:28:48,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2018-09-26 21:28:48,841 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2018-09-26 21:28:48,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:48,841 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2018-09-26 21:28:48,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-26 21:28:48,841 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2018-09-26 21:28:48,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-26 21:28:48,842 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:48,842 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 1, 1, 1, 1] [2018-09-26 21:28:48,842 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:48,842 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:48,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1226635779, now seen corresponding path program 64 times [2018-09-26 21:28:48,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:48,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:48,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:48,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:48,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:48,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:49,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:49,430 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:49,430 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 [2018-09-26 21:28:49,438 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:28:49,520 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:28:49,520 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:49,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:49,799 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:49,799 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2018-09-26 21:28:49,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-26 21:28:49,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-26 21:28:49,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:28:49,800 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 39 states. [2018-09-26 21:28:50,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:50,509 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-09-26 21:28:50,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-26 21:28:50,509 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 136 [2018-09-26 21:28:50,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:50,510 INFO L225 Difference]: With dead ends: 145 [2018-09-26 21:28:50,510 INFO L226 Difference]: Without dead ends: 143 [2018-09-26 21:28:50,511 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1964, Invalid=3292, Unknown=0, NotChecked=0, Total=5256 [2018-09-26 21:28:50,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-26 21:28:50,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-09-26 21:28:50,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-26 21:28:50,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-09-26 21:28:50,538 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2018-09-26 21:28:50,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:50,539 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-09-26 21:28:50,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-26 21:28:50,539 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-09-26 21:28:50,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-26 21:28:50,540 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:50,540 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-09-26 21:28:50,540 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:50,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:50,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1975877759, now seen corresponding path program 65 times [2018-09-26 21:28:50,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:50,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:50,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:50,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:50,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:52,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:52,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:52,065 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 [2018-09-26 21:28:52,074 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:28:52,187 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-26 21:28:52,187 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:52,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:54,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:54,297 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:54,297 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 103 [2018-09-26 21:28:54,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-26 21:28:54,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-26 21:28:54,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2483, Invalid=8229, Unknown=0, NotChecked=0, Total=10712 [2018-09-26 21:28:54,298 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 104 states. [2018-09-26 21:28:56,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:56,760 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2018-09-26 21:28:56,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-26 21:28:56,761 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 138 [2018-09-26 21:28:56,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:56,761 INFO L225 Difference]: With dead ends: 212 [2018-09-26 21:28:56,761 INFO L226 Difference]: Without dead ends: 141 [2018-09-26 21:28:56,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3861 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4336, Invalid=14570, Unknown=0, NotChecked=0, Total=18906 [2018-09-26 21:28:56,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-26 21:28:56,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-26 21:28:56,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-26 21:28:56,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-09-26 21:28:56,789 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-09-26 21:28:56,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:56,789 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-09-26 21:28:56,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-26 21:28:56,789 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-09-26 21:28:56,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-26 21:28:56,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:56,790 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 1, 1, 1, 1] [2018-09-26 21:28:56,790 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:56,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:56,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1050354361, now seen corresponding path program 66 times [2018-09-26 21:28:56,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:56,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:56,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:56,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:56,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:56,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:57,373 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:57,373 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 [2018-09-26 21:28:57,380 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:28:57,496 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-09-26 21:28:57,496 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:57,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:57,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:57,581 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:57,582 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-09-26 21:28:57,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:28:57,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:28:57,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:28:57,582 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 40 states. [2018-09-26 21:28:58,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:58,324 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2018-09-26 21:28:58,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-26 21:28:58,324 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 140 [2018-09-26 21:28:58,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:58,325 INFO L225 Difference]: With dead ends: 149 [2018-09-26 21:28:58,325 INFO L226 Difference]: Without dead ends: 147 [2018-09-26 21:28:58,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2074, Invalid=3476, Unknown=0, NotChecked=0, Total=5550 [2018-09-26 21:28:58,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-26 21:28:58,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2018-09-26 21:28:58,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-26 21:28:58,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2018-09-26 21:28:58,355 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 140 [2018-09-26 21:28:58,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:58,355 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2018-09-26 21:28:58,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:28:58,356 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2018-09-26 21:28:58,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-26 21:28:58,356 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:58,356 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1] [2018-09-26 21:28:58,356 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:58,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:58,357 INFO L82 PathProgramCache]: Analyzing trace with hash 73159605, now seen corresponding path program 67 times [2018-09-26 21:28:58,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:58,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:58,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:58,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:58,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:58,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:00,100 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:00,100 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 [2018-09-26 21:29:00,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:00,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:02,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:02,137 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:02,138 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 106 [2018-09-26 21:29:02,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-26 21:29:02,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-26 21:29:02,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2626, Invalid=8716, Unknown=0, NotChecked=0, Total=11342 [2018-09-26 21:29:02,139 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 107 states. [2018-09-26 21:29:04,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:04,937 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2018-09-26 21:29:04,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-26 21:29:04,938 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 142 [2018-09-26 21:29:04,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:04,938 INFO L225 Difference]: With dead ends: 218 [2018-09-26 21:29:04,939 INFO L226 Difference]: Without dead ends: 145 [2018-09-26 21:29:04,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4097 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4586, Invalid=15436, Unknown=0, NotChecked=0, Total=20022 [2018-09-26 21:29:04,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-26 21:29:04,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-26 21:29:04,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-26 21:29:04,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-09-26 21:29:04,977 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 142 [2018-09-26 21:29:04,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:04,977 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-09-26 21:29:04,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-26 21:29:04,977 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-09-26 21:29:04,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-26 21:29:04,978 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:04,978 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 1, 1, 1, 1] [2018-09-26 21:29:04,978 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:04,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:04,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1220692207, now seen corresponding path program 68 times [2018-09-26 21:29:04,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:04,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:04,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:04,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:04,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:04,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:05,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:05,611 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:05,611 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:05,634 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:29:05,716 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:29:05,717 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:05,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:05,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:05,800 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:05,800 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2018-09-26 21:29:05,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:29:05,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:29:05,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=894, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:29:05,801 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 41 states. [2018-09-26 21:29:06,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:06,568 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2018-09-26 21:29:06,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-26 21:29:06,568 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 144 [2018-09-26 21:29:06,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:06,569 INFO L225 Difference]: With dead ends: 153 [2018-09-26 21:29:06,569 INFO L226 Difference]: Without dead ends: 151 [2018-09-26 21:29:06,569 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2187, Invalid=3665, Unknown=0, NotChecked=0, Total=5852 [2018-09-26 21:29:06,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-26 21:29:06,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2018-09-26 21:29:06,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-26 21:29:06,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-09-26 21:29:06,603 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-09-26 21:29:06,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:06,603 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-09-26 21:29:06,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:29:06,603 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-09-26 21:29:06,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-26 21:29:06,604 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:06,604 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-09-26 21:29:06,604 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:06,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:06,605 INFO L82 PathProgramCache]: Analyzing trace with hash 559072363, now seen corresponding path program 69 times [2018-09-26 21:29:06,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:06,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:06,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:06,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:06,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:06,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:08,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:08,269 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:08,269 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:08,276 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:29:08,404 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-26 21:29:08,404 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:08,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:10,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:10,681 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:10,681 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 109 [2018-09-26 21:29:10,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-26 21:29:10,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-26 21:29:10,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2773, Invalid=9217, Unknown=0, NotChecked=0, Total=11990 [2018-09-26 21:29:10,683 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 110 states. [2018-09-26 21:29:13,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:13,552 INFO L93 Difference]: Finished difference Result 224 states and 226 transitions. [2018-09-26 21:29:13,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-26 21:29:13,552 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 146 [2018-09-26 21:29:13,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:13,553 INFO L225 Difference]: With dead ends: 224 [2018-09-26 21:29:13,553 INFO L226 Difference]: Without dead ends: 149 [2018-09-26 21:29:13,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4340 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4843, Invalid=16327, Unknown=0, NotChecked=0, Total=21170 [2018-09-26 21:29:13,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-26 21:29:13,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-26 21:29:13,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-26 21:29:13,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2018-09-26 21:29:13,590 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2018-09-26 21:29:13,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:13,591 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2018-09-26 21:29:13,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-26 21:29:13,591 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2018-09-26 21:29:13,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-26 21:29:13,592 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:13,592 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 35, 1, 1, 1, 1] [2018-09-26 21:29:13,592 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:13,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:13,592 INFO L82 PathProgramCache]: Analyzing trace with hash 719817893, now seen corresponding path program 70 times [2018-09-26 21:29:13,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:13,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:13,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:13,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:13,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:13,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:14,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:14,320 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:14,320 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 [2018-09-26 21:29:14,327 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:29:14,419 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:29:14,420 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:14,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:14,534 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:14,535 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-09-26 21:29:14,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:29:14,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:29:14,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:29:14,536 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 42 states. [2018-09-26 21:29:15,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:15,414 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-09-26 21:29:15,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-26 21:29:15,414 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 148 [2018-09-26 21:29:15,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:15,415 INFO L225 Difference]: With dead ends: 157 [2018-09-26 21:29:15,415 INFO L226 Difference]: Without dead ends: 155 [2018-09-26 21:29:15,416 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 [2018-09-26 21:29:15,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-26 21:29:15,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2018-09-26 21:29:15,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-26 21:29:15,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2018-09-26 21:29:15,452 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 148 [2018-09-26 21:29:15,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:15,452 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2018-09-26 21:29:15,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:29:15,452 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2018-09-26 21:29:15,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-26 21:29:15,453 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:15,453 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1] [2018-09-26 21:29:15,453 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:15,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:15,454 INFO L82 PathProgramCache]: Analyzing trace with hash 255193761, now seen corresponding path program 71 times [2018-09-26 21:29:15,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:15,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:15,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:15,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:15,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:15,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:17,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:17,176 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:17,176 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 [2018-09-26 21:29:17,183 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:29:17,314 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-26 21:29:17,314 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:17,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:19,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:19,690 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:19,691 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 112 [2018-09-26 21:29:19,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-26 21:29:19,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-26 21:29:19,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2924, Invalid=9732, Unknown=0, NotChecked=0, Total=12656 [2018-09-26 21:29:19,692 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 113 states. [2018-09-26 21:29:22,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:22,591 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2018-09-26 21:29:22,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-26 21:29:22,591 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 150 [2018-09-26 21:29:22,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:22,592 INFO L225 Difference]: With dead ends: 230 [2018-09-26 21:29:22,592 INFO L226 Difference]: Without dead ends: 153 [2018-09-26 21:29:22,593 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4590 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=5107, Invalid=17243, Unknown=0, NotChecked=0, Total=22350 [2018-09-26 21:29:22,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-26 21:29:22,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-26 21:29:22,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-26 21:29:22,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-09-26 21:29:22,630 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2018-09-26 21:29:22,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:22,631 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-09-26 21:29:22,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-26 21:29:22,631 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-09-26 21:29:22,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-26 21:29:22,631 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:22,631 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 36, 1, 1, 1, 1] [2018-09-26 21:29:22,632 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:22,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:22,632 INFO L82 PathProgramCache]: Analyzing trace with hash 878185947, now seen corresponding path program 72 times [2018-09-26 21:29:22,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:22,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:22,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:22,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:22,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:22,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:24,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:24,034 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:24,034 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:24,041 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:29:24,172 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-09-26 21:29:24,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:24,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:24,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:24,260 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:24,260 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2018-09-26 21:29:24,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-26 21:29:24,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-26 21:29:24,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=981, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:29:24,261 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 43 states. [2018-09-26 21:29:25,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:25,306 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2018-09-26 21:29:25,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-26 21:29:25,306 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 152 [2018-09-26 21:29:25,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:25,307 INFO L225 Difference]: With dead ends: 161 [2018-09-26 21:29:25,307 INFO L226 Difference]: Without dead ends: 159 [2018-09-26 21:29:25,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2422, Invalid=4058, Unknown=0, NotChecked=0, Total=6480 [2018-09-26 21:29:25,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-26 21:29:25,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2018-09-26 21:29:25,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-26 21:29:25,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-09-26 21:29:25,340 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2018-09-26 21:29:25,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:25,340 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-09-26 21:29:25,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-26 21:29:25,340 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-09-26 21:29:25,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-26 21:29:25,341 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:25,341 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-09-26 21:29:25,341 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:25,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:25,342 INFO L82 PathProgramCache]: Analyzing trace with hash 2123038295, now seen corresponding path program 73 times [2018-09-26 21:29:25,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:25,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:25,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:25,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:25,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:27,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:27,146 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 [2018-09-26 21:29:27,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:27,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:27,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:29,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:29,513 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 115 [2018-09-26 21:29:29,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-26 21:29:29,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-26 21:29:29,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3079, Invalid=10261, Unknown=0, NotChecked=0, Total=13340 [2018-09-26 21:29:29,514 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 116 states. [2018-09-26 21:29:32,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:32,735 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2018-09-26 21:29:32,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-26 21:29:32,735 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 154 [2018-09-26 21:29:32,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:32,736 INFO L225 Difference]: With dead ends: 236 [2018-09-26 21:29:32,736 INFO L226 Difference]: Without dead ends: 157 [2018-09-26 21:29:32,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4847 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5378, Invalid=18184, Unknown=0, NotChecked=0, Total=23562 [2018-09-26 21:29:32,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-26 21:29:32,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-26 21:29:32,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-26 21:29:32,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2018-09-26 21:29:32,769 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2018-09-26 21:29:32,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:32,769 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2018-09-26 21:29:32,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-26 21:29:32,769 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2018-09-26 21:29:32,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-26 21:29:32,770 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:32,770 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 37, 1, 1, 1, 1] [2018-09-26 21:29:32,770 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:32,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:32,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1034359663, now seen corresponding path program 74 times [2018-09-26 21:29:32,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:32,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:32,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:32,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:32,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:32,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:33,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:33,533 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:33,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:33,540 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:29:33,631 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:29:33,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:33,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:33,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:33,722 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:33,722 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-09-26 21:29:33,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:29:33,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:29:33,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:29:33,723 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 44 states. [2018-09-26 21:29:34,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:34,634 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2018-09-26 21:29:34,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-26 21:29:34,634 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 156 [2018-09-26 21:29:34,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:34,635 INFO L225 Difference]: With dead ends: 165 [2018-09-26 21:29:34,635 INFO L226 Difference]: Without dead ends: 163 [2018-09-26 21:29:34,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2544, Invalid=4262, Unknown=0, NotChecked=0, Total=6806 [2018-09-26 21:29:34,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-26 21:29:34,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-09-26 21:29:34,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-26 21:29:34,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2018-09-26 21:29:34,672 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2018-09-26 21:29:34,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:34,673 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2018-09-26 21:29:34,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:29:34,673 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2018-09-26 21:29:34,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-26 21:29:34,673 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:34,673 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1] [2018-09-26 21:29:34,674 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:34,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:34,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1882257523, now seen corresponding path program 75 times [2018-09-26 21:29:34,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:34,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:34,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:34,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:34,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:34,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:36,795 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:36,795 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 [2018-09-26 21:29:36,802 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:29:36,942 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-26 21:29:36,942 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:36,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:39,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:39,337 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:39,337 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 118 [2018-09-26 21:29:39,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-26 21:29:39,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-26 21:29:39,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3238, Invalid=10804, Unknown=0, NotChecked=0, Total=14042 [2018-09-26 21:29:39,338 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 119 states. [2018-09-26 21:29:42,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:42,753 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2018-09-26 21:29:42,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-26 21:29:42,753 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 158 [2018-09-26 21:29:42,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:42,754 INFO L225 Difference]: With dead ends: 242 [2018-09-26 21:29:42,754 INFO L226 Difference]: Without dead ends: 161 [2018-09-26 21:29:42,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5111 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5656, Invalid=19150, Unknown=0, NotChecked=0, Total=24806 [2018-09-26 21:29:42,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-26 21:29:42,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-26 21:29:42,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-26 21:29:42,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-09-26 21:29:42,789 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 158 [2018-09-26 21:29:42,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:42,789 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-09-26 21:29:42,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-26 21:29:42,790 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-09-26 21:29:42,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-26 21:29:42,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:42,791 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 38, 1, 1, 1, 1] [2018-09-26 21:29:42,791 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:42,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:42,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1109870791, now seen corresponding path program 76 times [2018-09-26 21:29:42,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:42,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:42,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:42,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:42,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:43,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:43,687 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:43,687 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 [2018-09-26 21:29:43,696 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:29:43,790 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:29:43,790 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:43,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:43,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:43,882 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:43,882 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2018-09-26 21:29:43,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-26 21:29:43,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-26 21:29:43,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=1072, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:29:43,883 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 45 states. [2018-09-26 21:29:44,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:44,818 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2018-09-26 21:29:44,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-26 21:29:44,819 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 160 [2018-09-26 21:29:44,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:44,819 INFO L225 Difference]: With dead ends: 169 [2018-09-26 21:29:44,819 INFO L226 Difference]: Without dead ends: 167 [2018-09-26 21:29:44,820 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 [2018-09-26 21:29:44,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-26 21:29:44,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2018-09-26 21:29:44,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-26 21:29:44,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-09-26 21:29:44,857 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2018-09-26 21:29:44,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:44,857 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-09-26 21:29:44,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-26 21:29:44,857 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-09-26 21:29:44,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-26 21:29:44,858 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:44,858 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-09-26 21:29:44,858 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:44,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:44,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1433873987, now seen corresponding path program 77 times [2018-09-26 21:29:44,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:44,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:44,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:44,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:44,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:44,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:47,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:47,242 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:47,242 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:47,249 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:29:47,391 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-26 21:29:47,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:47,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:49,932 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:49,933 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 121 [2018-09-26 21:29:49,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-26 21:29:49,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-26 21:29:49,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3401, Invalid=11361, Unknown=0, NotChecked=0, Total=14762 [2018-09-26 21:29:49,934 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 122 states. [2018-09-26 21:29:53,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:53,606 INFO L93 Difference]: Finished difference Result 248 states and 250 transitions. [2018-09-26 21:29:53,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-26 21:29:53,606 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 162 [2018-09-26 21:29:53,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:53,607 INFO L225 Difference]: With dead ends: 248 [2018-09-26 21:29:53,607 INFO L226 Difference]: Without dead ends: 165 [2018-09-26 21:29:53,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5382 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=5941, Invalid=20141, Unknown=0, NotChecked=0, Total=26082 [2018-09-26 21:29:53,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-26 21:29:53,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-26 21:29:53,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-26 21:29:53,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-09-26 21:29:53,643 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2018-09-26 21:29:53,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:53,643 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-09-26 21:29:53,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-26 21:29:53,643 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-09-26 21:29:53,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-26 21:29:53,644 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:53,644 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 39, 1, 1, 1, 1] [2018-09-26 21:29:53,644 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:53,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:53,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1292352899, now seen corresponding path program 78 times [2018-09-26 21:29:53,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:53,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:53,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:53,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:53,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:53,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:54,449 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:54,449 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 [2018-09-26 21:29:54,457 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:29:54,599 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2018-09-26 21:29:54,599 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:54,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:54,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:54,770 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:54,771 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-09-26 21:29:54,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-26 21:29:54,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-26 21:29:54,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:29:54,772 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 46 states. [2018-09-26 21:29:55,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:55,938 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2018-09-26 21:29:55,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-26 21:29:55,938 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 164 [2018-09-26 21:29:55,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:55,939 INFO L225 Difference]: With dead ends: 173 [2018-09-26 21:29:55,939 INFO L226 Difference]: Without dead ends: 171 [2018-09-26 21:29:55,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2797, Invalid=4685, Unknown=0, NotChecked=0, Total=7482 [2018-09-26 21:29:55,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-26 21:29:55,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2018-09-26 21:29:55,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-26 21:29:55,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2018-09-26 21:29:55,980 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 164 [2018-09-26 21:29:55,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:55,980 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2018-09-26 21:29:55,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-26 21:29:55,980 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2018-09-26 21:29:55,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-26 21:29:55,981 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:55,981 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1] [2018-09-26 21:29:55,981 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:55,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:55,982 INFO L82 PathProgramCache]: Analyzing trace with hash -705654151, now seen corresponding path program 79 times [2018-09-26 21:29:55,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:55,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:55,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:55,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:55,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:58,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1640 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:58,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:58,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:58,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:58,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:58,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1640 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:00,932 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:00,932 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 124 [2018-09-26 21:30:00,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-26 21:30:00,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-26 21:30:00,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3568, Invalid=11932, Unknown=0, NotChecked=0, Total=15500 [2018-09-26 21:30:00,934 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 125 states. [2018-09-26 21:30:04,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:04,653 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2018-09-26 21:30:04,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-26 21:30:04,654 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 166 [2018-09-26 21:30:04,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:04,654 INFO L225 Difference]: With dead ends: 254 [2018-09-26 21:30:04,654 INFO L226 Difference]: Without dead ends: 169 [2018-09-26 21:30:04,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5660 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=6233, Invalid=21157, Unknown=0, NotChecked=0, Total=27390 [2018-09-26 21:30:04,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-26 21:30:04,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-26 21:30:04,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-26 21:30:04,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2018-09-26 21:30:04,695 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 166 [2018-09-26 21:30:04,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:04,696 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2018-09-26 21:30:04,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-26 21:30:04,696 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2018-09-26 21:30:04,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-26 21:30:04,697 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:04,697 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 40, 1, 1, 1, 1] [2018-09-26 21:30:04,697 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:04,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:04,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1476855373, now seen corresponding path program 80 times [2018-09-26 21:30:04,697 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:04,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:04,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:04,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:04,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:05,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:05,689 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:05,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:05,696 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:05,794 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:05,795 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:05,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:05,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:05,912 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:05,912 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2018-09-26 21:30:05,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-26 21:30:05,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-26 21:30:05,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=995, Invalid=1167, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:30:05,913 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 47 states. [2018-09-26 21:30:06,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:06,910 INFO L93 Difference]: Finished difference Result 177 states and 178 transitions. [2018-09-26 21:30:06,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-26 21:30:06,910 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 168 [2018-09-26 21:30:06,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:06,911 INFO L225 Difference]: With dead ends: 177 [2018-09-26 21:30:06,911 INFO L226 Difference]: Without dead ends: 175 [2018-09-26 21:30:06,912 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 [2018-09-26 21:30:06,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-26 21:30:06,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2018-09-26 21:30:06,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-26 21:30:06,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-09-26 21:30:06,951 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 168 [2018-09-26 21:30:06,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:06,951 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-09-26 21:30:06,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-26 21:30:06,951 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-09-26 21:30:06,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-26 21:30:06,952 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:06,952 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1] [2018-09-26 21:30:06,952 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:06,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:06,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1918872529, now seen corresponding path program 81 times [2018-09-26 21:30:06,952 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:06,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:06,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:06,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:06,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:06,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:09,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:09,175 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:09,175 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:09,182 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:09,337 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-26 21:30:09,338 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:09,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:12,329 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:12,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 127 [2018-09-26 21:30:12,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-26 21:30:12,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-26 21:30:12,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3739, Invalid=12517, Unknown=0, NotChecked=0, Total=16256 [2018-09-26 21:30:12,330 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 128 states. [2018-09-26 21:30:15,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:15,352 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2018-09-26 21:30:15,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-26 21:30:15,352 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 170 [2018-09-26 21:30:15,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:15,353 INFO L225 Difference]: With dead ends: 260 [2018-09-26 21:30:15,353 INFO L226 Difference]: Without dead ends: 173 [2018-09-26 21:30:15,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5945 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=6532, Invalid=22198, Unknown=0, NotChecked=0, Total=28730 [2018-09-26 21:30:15,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-26 21:30:15,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-26 21:30:15,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-26 21:30:15,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2018-09-26 21:30:15,393 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 170 [2018-09-26 21:30:15,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:15,393 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2018-09-26 21:30:15,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-26 21:30:15,393 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2018-09-26 21:30:15,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-26 21:30:15,394 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:15,394 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 41, 1, 1, 1, 1] [2018-09-26 21:30:15,394 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:15,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:15,394 INFO L82 PathProgramCache]: Analyzing trace with hash -900821399, now seen corresponding path program 82 times [2018-09-26 21:30:15,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:15,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:15,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:15,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:15,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:16,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:16,586 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:16,587 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 [2018-09-26 21:30:16,596 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:16,703 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:16,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:16,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:16,788 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:16,788 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2018-09-26 21:30:16,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:30:16,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:30:16,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:30:16,789 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 48 states. [2018-09-26 21:30:17,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:17,830 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2018-09-26 21:30:17,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-26 21:30:17,830 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 172 [2018-09-26 21:30:17,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:17,831 INFO L225 Difference]: With dead ends: 181 [2018-09-26 21:30:17,831 INFO L226 Difference]: Without dead ends: 179 [2018-09-26 21:30:17,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3062, Invalid=5128, Unknown=0, NotChecked=0, Total=8190 [2018-09-26 21:30:17,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-26 21:30:17,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2018-09-26 21:30:17,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-26 21:30:17,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2018-09-26 21:30:17,874 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 172 [2018-09-26 21:30:17,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:17,874 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2018-09-26 21:30:17,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:30:17,874 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2018-09-26 21:30:17,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-26 21:30:17,875 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:17,875 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1, 1, 1] [2018-09-26 21:30:17,875 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:17,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:17,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1893962597, now seen corresponding path program 83 times [2018-09-26 21:30:17,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:17,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:17,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:17,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:17,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 1806 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:20,208 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:20,208 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 [2018-09-26 21:30:20,216 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:30:20,375 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-26 21:30:20,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:20,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 1806 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:23,498 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:23,498 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 130 [2018-09-26 21:30:23,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-09-26 21:30:23,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-09-26 21:30:23,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3914, Invalid=13116, Unknown=0, NotChecked=0, Total=17030 [2018-09-26 21:30:23,500 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand 131 states. [2018-09-26 21:30:27,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:27,762 INFO L93 Difference]: Finished difference Result 266 states and 268 transitions. [2018-09-26 21:30:27,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-26 21:30:27,762 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 174 [2018-09-26 21:30:27,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:27,763 INFO L225 Difference]: With dead ends: 266 [2018-09-26 21:30:27,763 INFO L226 Difference]: Without dead ends: 177 [2018-09-26 21:30:27,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6237 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=6838, Invalid=23264, Unknown=0, NotChecked=0, Total=30102 [2018-09-26 21:30:27,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-26 21:30:27,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-09-26 21:30:27,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-26 21:30:27,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2018-09-26 21:30:27,804 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 174 [2018-09-26 21:30:27,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:27,804 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2018-09-26 21:30:27,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-09-26 21:30:27,804 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2018-09-26 21:30:27,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-26 21:30:27,805 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:27,805 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 42, 1, 1, 1, 1] [2018-09-26 21:30:27,806 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:27,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:27,806 INFO L82 PathProgramCache]: Analyzing trace with hash -619306849, now seen corresponding path program 84 times [2018-09-26 21:30:27,806 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:27,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:27,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:27,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:27,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:27,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:28,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:28,719 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:28,719 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:28,726 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:30:28,887 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-09-26 21:30:28,888 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:28,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:28,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:28,987 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:28,987 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2018-09-26 21:30:28,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-26 21:30:28,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-26 21:30:28,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=1266, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:30:28,988 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 49 states. [2018-09-26 21:30:30,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:30,020 INFO L93 Difference]: Finished difference Result 185 states and 186 transitions. [2018-09-26 21:30:30,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-26 21:30:30,020 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 176 [2018-09-26 21:30:30,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:30,021 INFO L225 Difference]: With dead ends: 185 [2018-09-26 21:30:30,021 INFO L226 Difference]: Without dead ends: 183 [2018-09-26 21:30:30,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1980 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3199, Invalid=5357, Unknown=0, NotChecked=0, Total=8556 [2018-09-26 21:30:30,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-26 21:30:30,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2018-09-26 21:30:30,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-26 21:30:30,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2018-09-26 21:30:30,066 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 176 [2018-09-26 21:30:30,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:30,067 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2018-09-26 21:30:30,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-26 21:30:30,067 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2018-09-26 21:30:30,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-26 21:30:30,067 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:30,068 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1] [2018-09-26 21:30:30,068 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:30,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:30,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1846505499, now seen corresponding path program 85 times [2018-09-26 21:30:30,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:30,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:30,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:30,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:30,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:30,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:32,819 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:32,819 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 [2018-09-26 21:30:32,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:32,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:32,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:35,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:35,940 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:35,940 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 133 [2018-09-26 21:30:35,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-26 21:30:35,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-26 21:30:35,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4093, Invalid=13729, Unknown=0, NotChecked=0, Total=17822 [2018-09-26 21:30:35,942 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 134 states. [2018-09-26 21:30:39,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:39,181 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2018-09-26 21:30:39,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-26 21:30:39,181 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 178 [2018-09-26 21:30:39,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:39,181 INFO L225 Difference]: With dead ends: 272 [2018-09-26 21:30:39,182 INFO L226 Difference]: Without dead ends: 181 [2018-09-26 21:30:39,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6536 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=7151, Invalid=24355, Unknown=0, NotChecked=0, Total=31506 [2018-09-26 21:30:39,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-26 21:30:39,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-26 21:30:39,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-26 21:30:39,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2018-09-26 21:30:39,225 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 178 [2018-09-26 21:30:39,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:39,225 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2018-09-26 21:30:39,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-26 21:30:39,226 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2018-09-26 21:30:39,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-26 21:30:39,226 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:39,226 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 43, 1, 1, 1, 1] [2018-09-26 21:30:39,226 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:39,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:39,227 INFO L82 PathProgramCache]: Analyzing trace with hash 895799381, now seen corresponding path program 86 times [2018-09-26 21:30:39,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:39,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:39,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:39,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:39,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:40,165 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:40,165 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 [2018-09-26 21:30:40,172 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:40,282 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:40,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:40,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:40,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:40,384 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:40,384 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2018-09-26 21:30:40,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:30:40,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:30:40,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:30:40,385 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand 50 states. [2018-09-26 21:30:41,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:41,749 INFO L93 Difference]: Finished difference Result 189 states and 190 transitions. [2018-09-26 21:30:41,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-26 21:30:41,749 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 180 [2018-09-26 21:30:41,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:41,750 INFO L225 Difference]: With dead ends: 189 [2018-09-26 21:30:41,750 INFO L226 Difference]: Without dead ends: 187 [2018-09-26 21:30:41,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3339, Invalid=5591, Unknown=0, NotChecked=0, Total=8930 [2018-09-26 21:30:41,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-26 21:30:41,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2018-09-26 21:30:41,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-26 21:30:41,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2018-09-26 21:30:41,796 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 180 [2018-09-26 21:30:41,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:41,796 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2018-09-26 21:30:41,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:30:41,796 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2018-09-26 21:30:41,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-26 21:30:41,797 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:41,797 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 1, 1, 1, 1] [2018-09-26 21:30:41,797 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:41,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:41,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1869679185, now seen corresponding path program 87 times [2018-09-26 21:30:41,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:41,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:41,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:41,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:41,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:41,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1980 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:44,429 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:44,429 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:44,438 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:44,611 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-26 21:30:44,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:44,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-09-26 21:30:44,644 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-26 21:30:44,845 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:44,845 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 21:30:44,851 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 21:30:44,851 INFO L202 PluginConnector]: Adding new model up.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:30:44 BoogieIcfgContainer [2018-09-26 21:30:44,851 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:30:44,852 INFO L168 Benchmark]: Toolchain (without parser) took 238380.47 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 175.6 MB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -19.1 MB). Peak memory consumption was 156.5 MB. Max. memory is 7.1 GB. [2018-09-26 21:30:44,853 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.26 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. [2018-09-26 21:30:44,853 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.64 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. [2018-09-26 21:30:44,854 INFO L168 Benchmark]: Boogie Preprocessor took 22.11 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. [2018-09-26 21:30:44,854 INFO L168 Benchmark]: RCFGBuilder took 359.32 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. [2018-09-26 21:30:44,854 INFO L168 Benchmark]: TraceAbstraction took 237957.13 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 175.6 MB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -40.3 MB). Peak memory consumption was 135.4 MB. Max. memory is 7.1 GB. [2018-09-26 21:30:44,857 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 0.26 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 35.64 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 22.11 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 359.32 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 237957.13 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 175.6 MB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -40.3 MB). Peak memory consumption was 135.4 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 183 with TraceHistMax 45, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 92 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 237.8s OverallTime, 89 OverallIterations, 45 TraceHistogramMax, 92.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1388 SDtfs, 958 SDslu, 6716 SDs, 0 SdLazy, 64143 SolverSat, 4612 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 36.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14243 GetRequests, 8086 SyntacticMatches, 0 SemanticMatches, 6157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129862 ImplicationChecksByTransitivity, 166.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=183occurred in iteration=88, 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: 1.6s AutomataMinimizationTime, 88 MinimizatonAttempts, 176 StatesRemovedByMinimization, 44 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 6.4s SatisfiabilityAnalysisTime, 128.8s InterpolantComputationTime, 16354 NumberOfCodeBlocks, 16354 NumberOfCodeBlocksAsserted, 1148 NumberOfCheckSat, 16180 ConstructedInterpolants, 0 QuantifiedInterpolants, 7209525 SizeOfPredicates, 258 NumberOfNonLiveVariables, 32250 ConjunctsInSsa, 4300 ConjunctsInUnsatCore, 174 InterpolantComputations, 2 PerfectInterpolantSequences, 117478/230998 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/up.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_21-30-44-870.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/up.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_21-30-44-870.csv Completed graceful shutdown