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/array2.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-4eac566 [2018-09-23 19:36:23,274 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 19:36:23,276 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 19:36:23,289 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 19:36:23,290 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 19:36:23,291 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 19:36:23,292 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 19:36:23,295 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 19:36:23,297 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 19:36:23,298 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 19:36:23,299 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-23 19:36:23,323 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 [2018-09-23 19:36:23,340 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 19:36:23,342 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 19:36:23,343 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 19:36:23,343 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 19:36:23,344 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 19:36:23,344 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 19:36:23,344 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 19:36:23,344 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 19:36:23,344 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 19:36:23,345 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 19:36:23,345 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 19:36:23,345 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 19:36:23,345 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 19:36:23,345 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 19:36:23,346 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 19:36:23,346 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 19:36:23,346 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 19:36:23,346 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 19:36:23,346 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 19:36:23,347 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 19:36:23,347 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 19:36:23,347 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 19:36:23,347 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:36:23,347 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 19:36:23,347 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 19:36:23,348 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 19:36:23,348 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 19:36:23,348 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 19:36:23,349 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 19:36:23,350 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 19:36:23,403 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 19:36:23,418 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 19:36:23,425 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 19:36:23,426 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 19:36:23,427 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 19:36:23,428 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array2.i_3.bpl [2018-09-23 19:36:23,428 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array2.i_3.bpl' [2018-09-23 19:36:23,484 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 19:36:23,488 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 19:36:23,489 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 19:36:23,489 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 19:36:23,489 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 19:36:23,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:36:23" (1/1) ... [2018-09-23 19:36:23,527 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:36:23" (1/1) ... [2018-09-23 19:36:23,536 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 19:36:23,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 19:36:23,537 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 19:36:23,538 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 19:36:23,549 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:36:23" (1/1) ... [2018-09-23 19:36:23,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:36:23" (1/1) ... [2018-09-23 19:36:23,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:36:23" (1/1) ... [2018-09-23 19:36:23,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:36:23" (1/1) ... [2018-09-23 19:36:23,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:36:23" (1/1) ... [2018-09-23 19:36:23,559 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:36:23" (1/1) ... [2018-09-23 19:36:23,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:36:23" (1/1) ... [2018-09-23 19:36:23,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 19:36:23,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 19:36:23,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 19:36:23,563 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 19:36:23,564 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:36:23" (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 [2018-09-23 19:36:23,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-23 19:36:23,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-23 19:36:23,841 INFO L354 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-23 19:36:23,842 INFO L202 PluginConnector]: Adding new model array2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:36:23 BoogieIcfgContainer [2018-09-23 19:36:23,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 19:36:23,843 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 19:36:23,843 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 19:36:23,846 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 19:36:23,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:36:23" (1/2) ... [2018-09-23 19:36:23,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cde4496 and model type array2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 07:36:23, skipping insertion in model container [2018-09-23 19:36:23,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:36:23" (2/2) ... [2018-09-23 19:36:23,850 INFO L112 eAbstractionObserver]: Analyzing ICFG array2.i_3.bpl [2018-09-23 19:36:23,860 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 19:36:23,868 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 19:36:23,917 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 19:36:23,918 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 19:36:23,918 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 19:36:23,918 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 19:36:23,918 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 19:36:23,919 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 19:36:23,919 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 19:36:23,919 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 19:36:23,919 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 19:36:23,932 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-23 19:36:23,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-23 19:36:23,938 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:23,939 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-23 19:36:23,940 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:23,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:23,947 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-23 19:36:23,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:23,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:23,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:23,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:23,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:24,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:24,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:24,109 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:36:24,110 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-23 19:36:24,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 19:36:24,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 19:36:24,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:36:24,129 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-23 19:36:24,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:24,172 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-23 19:36:24,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 19:36:24,174 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-23 19:36:24,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:24,185 INFO L225 Difference]: With dead ends: 11 [2018-09-23 19:36:24,185 INFO L226 Difference]: Without dead ends: 7 [2018-09-23 19:36:24,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:36:24,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-23 19:36:24,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-23 19:36:24,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-23 19:36:24,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-23 19:36:24,226 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-23 19:36:24,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:24,227 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-23 19:36:24,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 19:36:24,227 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-23 19:36:24,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-23 19:36:24,227 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:24,228 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-23 19:36:24,228 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:24,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:24,228 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-23 19:36:24,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:24,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:24,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:24,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:24,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:24,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:24,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:24,366 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:24,366 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:36:24,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:24,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:24,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:24,460 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:24,461 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-23 19:36:24,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 19:36:24,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 19:36:24,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:36:24,463 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-09-23 19:36:24,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:24,485 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-23 19:36:24,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 19:36:24,487 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-23 19:36:24,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:24,488 INFO L225 Difference]: With dead ends: 11 [2018-09-23 19:36:24,488 INFO L226 Difference]: Without dead ends: 9 [2018-09-23 19:36:24,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:36:24,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-23 19:36:24,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-23 19:36:24,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 19:36:24,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-23 19:36:24,494 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-23 19:36:24,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:24,494 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-23 19:36:24,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 19:36:24,494 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-23 19:36:24,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 19:36:24,495 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:24,495 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-23 19:36:24,496 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:24,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:24,496 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-09-23 19:36:24,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:24,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:24,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:24,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:24,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:24,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:24,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:24,584 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:24,584 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 [2018-09-23 19:36:24,593 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:36:24,620 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:36:24,621 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:24,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:24,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:24,647 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:24,647 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 19:36:24,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 19:36:24,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 19:36:24,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:36:24,649 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-09-23 19:36:24,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:24,706 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-23 19:36:24,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 19:36:24,706 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-23 19:36:24,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:24,708 INFO L225 Difference]: With dead ends: 13 [2018-09-23 19:36:24,708 INFO L226 Difference]: Without dead ends: 11 [2018-09-23 19:36:24,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:36:24,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-23 19:36:24,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-23 19:36:24,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-23 19:36:24,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-23 19:36:24,712 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-23 19:36:24,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:24,712 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-23 19:36:24,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 19:36:24,713 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-23 19:36:24,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 19:36:24,713 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:24,713 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-23 19:36:24,714 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:24,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:24,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-09-23 19:36:24,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:24,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:24,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:24,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:24,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:24,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:24,832 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:24,833 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 [2018-09-23 19:36:24,842 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:36:24,896 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-23 19:36:24,897 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:24,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:24,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:24,926 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:24,927 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 19:36:24,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 19:36:24,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 19:36:24,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:36:24,928 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-09-23 19:36:25,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:25,015 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-23 19:36:25,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:36:25,015 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-23 19:36:25,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:25,016 INFO L225 Difference]: With dead ends: 15 [2018-09-23 19:36:25,016 INFO L226 Difference]: Without dead ends: 13 [2018-09-23 19:36:25,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:36:25,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-23 19:36:25,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-23 19:36:25,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-23 19:36:25,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-23 19:36:25,021 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-23 19:36:25,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:25,021 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-23 19:36:25,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 19:36:25,022 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-23 19:36:25,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 19:36:25,022 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:25,022 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-23 19:36:25,023 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:25,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:25,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-09-23 19:36:25,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:25,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:25,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:25,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:25,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:25,310 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:25,310 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:25,310 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 [2018-09-23 19:36:25,319 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:36:25,357 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:36:25,358 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:25,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:25,376 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:25,407 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:25,407 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:36:25,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:36:25,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:36:25,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:36:25,408 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-09-23 19:36:25,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:25,450 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-23 19:36:25,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:36:25,451 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-23 19:36:25,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:25,452 INFO L225 Difference]: With dead ends: 17 [2018-09-23 19:36:25,454 INFO L226 Difference]: Without dead ends: 15 [2018-09-23 19:36:25,455 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:36:25,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-23 19:36:25,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-23 19:36:25,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-23 19:36:25,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-23 19:36:25,461 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-23 19:36:25,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:25,461 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-23 19:36:25,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:36:25,462 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-23 19:36:25,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 19:36:25,463 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:25,463 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-23 19:36:25,463 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:25,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:25,464 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-09-23 19:36:25,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:25,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:25,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:25,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:25,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:25,588 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:25,588 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 [2018-09-23 19:36:25,597 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:36:25,688 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-23 19:36:25,689 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:25,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:25,711 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:25,734 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:25,734 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:36:25,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:36:25,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:36:25,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:36:25,736 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-09-23 19:36:25,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:25,770 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-23 19:36:25,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:36:25,771 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-23 19:36:25,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:25,772 INFO L225 Difference]: With dead ends: 19 [2018-09-23 19:36:25,772 INFO L226 Difference]: Without dead ends: 17 [2018-09-23 19:36:25,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:36:25,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-23 19:36:25,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-23 19:36:25,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-23 19:36:25,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-23 19:36:25,777 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-23 19:36:25,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:25,778 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-23 19:36:25,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:36:25,778 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-23 19:36:25,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 19:36:25,779 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:25,779 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-09-23 19:36:25,779 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:25,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:25,780 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-09-23 19:36:25,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:25,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:25,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:25,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:25,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:25,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:25,887 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:25,888 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:25,888 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 [2018-09-23 19:36:25,900 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:36:25,932 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 19:36:25,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:25,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:25,963 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:25,963 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:36:25,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:36:25,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:36:25,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:36:25,965 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-09-23 19:36:26,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:26,010 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-23 19:36:26,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:36:26,012 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-23 19:36:26,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:26,013 INFO L225 Difference]: With dead ends: 21 [2018-09-23 19:36:26,013 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 19:36:26,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:36:26,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 19:36:26,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-23 19:36:26,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 19:36:26,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-23 19:36:26,018 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-23 19:36:26,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:26,018 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-23 19:36:26,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:36:26,019 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-23 19:36:26,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:36:26,019 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:26,020 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-23 19:36:26,020 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:26,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:26,020 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-09-23 19:36:26,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:26,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:26,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:26,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:26,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:26,485 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:26,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:26,486 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 [2018-09-23 19:36:26,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:26,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:26,559 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:26,559 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:36:26,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:36:26,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:36:26,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:36:26,560 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-09-23 19:36:26,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:26,617 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-23 19:36:26,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:36:26,617 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-23 19:36:26,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:26,618 INFO L225 Difference]: With dead ends: 23 [2018-09-23 19:36:26,618 INFO L226 Difference]: Without dead ends: 21 [2018-09-23 19:36:26,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:36:26,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-23 19:36:26,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-23 19:36:26,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-23 19:36:26,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-23 19:36:26,623 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-23 19:36:26,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:26,623 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-23 19:36:26,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:36:26,623 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-23 19:36:26,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 19:36:26,624 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:26,624 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-09-23 19:36:26,624 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:26,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:26,625 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-09-23 19:36:26,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:26,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:26,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:26,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:26,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:26,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:26,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:26,906 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:26,922 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:36:26,946 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:36:26,947 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:26,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:26,957 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:26,981 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:26,981 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:36:26,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:36:26,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:36:26,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:36:26,982 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-09-23 19:36:27,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:27,043 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-23 19:36:27,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:36:27,044 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-23 19:36:27,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:27,046 INFO L225 Difference]: With dead ends: 25 [2018-09-23 19:36:27,046 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 19:36:27,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:36:27,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 19:36:27,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-23 19:36:27,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-23 19:36:27,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-23 19:36:27,052 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-23 19:36:27,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:27,052 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-23 19:36:27,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:36:27,053 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-23 19:36:27,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 19:36:27,053 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:27,053 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-23 19:36:27,054 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:27,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:27,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-09-23 19:36:27,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:27,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:27,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:27,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:27,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:27,290 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:27,290 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:27,290 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:36:27,301 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:36:27,325 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-23 19:36:27,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:27,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:27,338 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:27,361 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:27,361 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-23 19:36:27,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:36:27,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:36:27,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:36:27,363 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-09-23 19:36:27,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:27,434 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-23 19:36:27,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 19:36:27,434 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-23 19:36:27,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:27,435 INFO L225 Difference]: With dead ends: 27 [2018-09-23 19:36:27,435 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 19:36:27,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:36:27,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 19:36:27,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-23 19:36:27,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 19:36:27,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-23 19:36:27,441 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-23 19:36:27,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:27,441 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-23 19:36:27,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:36:27,441 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-23 19:36:27,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 19:36:27,442 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:27,442 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-09-23 19:36:27,443 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:27,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:27,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-09-23 19:36:27,443 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:27,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:27,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:27,445 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:27,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:27,710 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:27,710 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:36:27,717 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:36:27,749 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:36:27,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:27,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:27,786 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:27,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-23 19:36:27,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:36:27,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:36:27,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:36:27,788 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-09-23 19:36:27,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:27,833 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-23 19:36:27,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:36:27,833 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-23 19:36:27,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:27,834 INFO L225 Difference]: With dead ends: 29 [2018-09-23 19:36:27,834 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 19:36:27,835 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:36:27,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 19:36:27,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-23 19:36:27,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-23 19:36:27,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-23 19:36:27,839 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-23 19:36:27,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:27,840 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-23 19:36:27,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:36:27,840 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-23 19:36:27,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 19:36:27,841 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:27,841 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-09-23 19:36:27,841 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:27,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:27,841 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-09-23 19:36:27,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:27,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:27,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:27,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:27,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:27,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:28,023 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:28,024 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:28,024 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 [2018-09-23 19:36:28,031 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:36:28,084 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-23 19:36:28,084 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:28,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:28,127 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:28,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 19:36:28,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:36:28,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:36:28,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:36:28,128 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-09-23 19:36:28,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:28,309 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-23 19:36:28,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 19:36:28,310 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-23 19:36:28,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:28,311 INFO L225 Difference]: With dead ends: 31 [2018-09-23 19:36:28,311 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 19:36:28,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:36:28,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 19:36:28,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-23 19:36:28,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 19:36:28,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-23 19:36:28,318 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-23 19:36:28,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:28,320 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-23 19:36:28,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:36:28,321 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-23 19:36:28,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 19:36:28,322 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:28,322 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-09-23 19:36:28,322 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:28,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:28,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-09-23 19:36:28,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:28,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:28,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:28,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:28,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:28,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:28,603 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:28,603 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 [2018-09-23 19:36:28,612 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:36:28,804 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-23 19:36:28,805 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:28,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:28,819 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:28,853 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:28,853 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-23 19:36:28,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:36:28,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:36:28,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:36:28,855 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-09-23 19:36:29,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:29,104 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-23 19:36:29,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 19:36:29,104 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-23 19:36:29,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:29,105 INFO L225 Difference]: With dead ends: 33 [2018-09-23 19:36:29,105 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 19:36:29,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:36:29,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 19:36:29,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-23 19:36:29,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 19:36:29,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-23 19:36:29,111 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-23 19:36:29,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:29,111 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-23 19:36:29,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:36:29,111 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-23 19:36:29,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-23 19:36:29,112 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:29,112 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-09-23 19:36:29,112 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:29,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:29,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-09-23 19:36:29,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:29,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:29,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:29,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:29,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:29,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:29,381 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:29,382 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:29,382 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 [2018-09-23 19:36:29,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:29,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:29,446 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:29,446 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 19:36:29,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:36:29,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:36:29,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:36:29,447 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-09-23 19:36:29,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:29,501 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-23 19:36:29,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 19:36:29,502 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-23 19:36:29,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:29,503 INFO L225 Difference]: With dead ends: 35 [2018-09-23 19:36:29,503 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 19:36:29,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:36:29,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 19:36:29,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-23 19:36:29,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-23 19:36:29,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-23 19:36:29,509 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-23 19:36:29,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:29,509 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-23 19:36:29,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:36:29,510 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-23 19:36:29,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 19:36:29,511 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:29,511 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-09-23 19:36:29,511 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:29,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:29,512 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-09-23 19:36:29,512 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:29,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:29,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:29,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:29,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:29,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:29,718 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:29,719 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:36:29,750 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:36:29,779 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:36:29,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:29,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:29,793 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:29,814 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:29,814 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-23 19:36:29,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:36:29,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:36:29,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:36:29,815 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-09-23 19:36:29,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:29,931 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-23 19:36:29,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:36:29,931 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-23 19:36:29,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:29,932 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:36:29,932 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:36:29,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:36:29,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:36:29,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-23 19:36:29,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-23 19:36:29,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-23 19:36:29,937 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-23 19:36:29,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:29,937 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-23 19:36:29,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:36:29,937 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-23 19:36:29,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 19:36:29,938 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:29,938 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-09-23 19:36:29,938 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:29,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:29,939 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-09-23 19:36:29,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:29,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:29,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:29,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:29,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:29,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:30,178 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:30,178 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:36:30,187 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:36:30,258 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-23 19:36:30,258 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:30,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:30,301 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:30,302 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-23 19:36:30,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:36:30,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:36:30,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:36:30,303 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-09-23 19:36:30,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:30,379 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-23 19:36:30,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 19:36:30,381 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-23 19:36:30,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:30,381 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:36:30,381 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:36:30,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:36:30,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:36:30,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-23 19:36:30,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-23 19:36:30,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-23 19:36:30,386 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-09-23 19:36:30,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:30,386 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-23 19:36:30,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:36:30,386 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-23 19:36:30,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-23 19:36:30,387 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:30,387 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-09-23 19:36:30,388 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:30,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:30,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-09-23 19:36:30,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:30,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:30,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:30,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:30,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:30,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:31,442 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:31,442 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:31,442 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:36:31,451 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:36:31,474 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:36:31,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:31,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:31,491 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:31,519 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:31,519 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-23 19:36:31,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 19:36:31,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 19:36:31,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:36:31,520 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-09-23 19:36:31,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:31,567 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-23 19:36:31,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 19:36:31,568 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-23 19:36:31,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:31,568 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:36:31,568 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:36:31,569 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:36:31,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:36:31,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-23 19:36:31,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 19:36:31,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-23 19:36:31,574 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-09-23 19:36:31,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:31,574 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-23 19:36:31,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 19:36:31,574 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-23 19:36:31,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 19:36:31,575 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:31,575 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-09-23 19:36:31,575 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:31,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:31,576 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-09-23 19:36:31,576 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:31,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:31,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:31,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:31,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:31,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:32,036 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:32,036 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:32,036 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:36:32,044 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:36:32,163 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-23 19:36:32,164 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:32,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:32,224 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:32,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 19:36:32,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 19:36:32,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 19:36:32,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:36:32,227 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-09-23 19:36:32,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:32,375 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-23 19:36:32,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 19:36:32,376 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-23 19:36:32,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:32,376 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:36:32,376 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:36:32,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:36:32,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:36:32,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-23 19:36:32,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 19:36:32,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-23 19:36:32,382 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-09-23 19:36:32,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:32,382 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-23 19:36:32,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 19:36:32,382 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-23 19:36:32,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-23 19:36:32,383 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:32,383 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-09-23 19:36:32,384 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:32,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:32,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-09-23 19:36:32,384 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:32,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:32,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:32,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:32,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:32,794 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:32,794 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:32,794 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:36:32,802 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:36:32,851 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-23 19:36:32,851 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:32,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:32,865 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:32,889 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:32,889 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-23 19:36:32,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 19:36:32,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 19:36:32,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:36:32,891 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-09-23 19:36:32,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:32,990 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-23 19:36:32,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 19:36:32,990 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-23 19:36:32,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:32,991 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:36:32,992 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:36:32,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:36:32,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:36:32,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-23 19:36:32,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 19:36:32,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-23 19:36:32,996 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-09-23 19:36:32,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:32,996 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-23 19:36:32,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 19:36:32,996 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-23 19:36:32,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 19:36:32,997 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:32,997 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-09-23 19:36:32,997 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:32,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:32,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-09-23 19:36:32,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:32,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:32,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:32,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:32,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:33,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:33,375 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:33,375 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:33,375 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 [2018-09-23 19:36:33,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:33,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:33,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:33,460 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:33,460 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 19:36:33,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 19:36:33,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 19:36:33,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:36:33,461 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-09-23 19:36:33,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:33,522 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-23 19:36:33,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 19:36:33,523 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-23 19:36:33,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:33,523 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:36:33,524 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:36:33,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:36:33,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:36:33,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-23 19:36:33,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-23 19:36:33,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-23 19:36:33,529 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-09-23 19:36:33,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:33,529 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-23 19:36:33,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 19:36:33,529 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-23 19:36:33,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 19:36:33,530 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:33,530 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-09-23 19:36:33,530 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:33,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:33,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-09-23 19:36:33,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:33,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:33,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:33,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:33,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:33,833 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:33,833 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:33,833 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 [2018-09-23 19:36:33,847 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:36:33,881 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:36:33,882 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:33,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:33,902 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:33,923 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:33,923 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-23 19:36:33,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 19:36:33,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 19:36:33,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:36:33,924 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-09-23 19:36:33,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:33,992 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-23 19:36:33,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:36:33,993 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-23 19:36:33,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:33,994 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:36:33,994 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:36:33,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:36:33,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:36:33,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-23 19:36:33,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 19:36:33,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-23 19:36:33,999 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-09-23 19:36:33,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:34,000 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-23 19:36:34,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 19:36:34,000 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-23 19:36:34,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-23 19:36:34,001 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:34,001 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-09-23 19:36:34,001 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:34,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:34,001 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-09-23 19:36:34,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:34,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:34,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:34,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:34,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:34,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:34,455 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:34,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:34,456 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 [2018-09-23 19:36:34,464 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:36:34,526 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-23 19:36:34,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:34,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:34,545 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:34,574 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:34,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-23 19:36:34,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 19:36:34,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 19:36:34,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:36:34,576 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-09-23 19:36:34,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:34,769 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-23 19:36:34,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 19:36:34,770 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-23 19:36:34,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:34,771 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:36:34,771 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:36:34,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:36:34,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:36:34,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-23 19:36:34,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-23 19:36:34,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-23 19:36:34,774 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-09-23 19:36:34,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:34,774 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-23 19:36:34,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 19:36:34,775 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-23 19:36:34,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-23 19:36:34,775 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:34,775 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-09-23 19:36:34,775 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:34,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:34,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-09-23 19:36:34,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:34,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:34,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:34,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:34,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:34,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:35,644 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:35,644 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:35,644 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:36:35,658 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:36:35,708 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:36:35,709 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:35,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:35,728 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:35,748 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:35,748 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-23 19:36:35,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 19:36:35,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 19:36:35,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:36:35,750 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-09-23 19:36:35,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:35,825 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-23 19:36:35,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 19:36:35,826 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-23 19:36:35,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:35,827 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:36:35,827 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:36:35,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:36:35,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:36:35,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-23 19:36:35,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-23 19:36:35,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-23 19:36:35,833 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-09-23 19:36:35,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:35,833 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-23 19:36:35,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 19:36:35,833 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-23 19:36:35,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 19:36:35,834 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:35,834 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-09-23 19:36:35,835 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:35,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:35,835 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-09-23 19:36:35,835 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:35,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:35,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:35,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:35,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:36,966 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:36,967 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:36,967 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 [2018-09-23 19:36:36,974 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:36:37,073 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-23 19:36:37,073 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:37,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:37,092 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:37,123 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:37,123 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 19:36:37,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 19:36:37,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 19:36:37,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:36:37,125 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-09-23 19:36:37,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:37,327 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-23 19:36:37,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 19:36:37,327 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-23 19:36:37,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:37,328 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:36:37,328 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:36:37,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:36:37,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:36:37,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-23 19:36:37,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-23 19:36:37,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-23 19:36:37,335 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-09-23 19:36:37,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:37,335 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-23 19:36:37,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 19:36:37,335 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-23 19:36:37,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-23 19:36:37,336 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:37,336 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-09-23 19:36:37,336 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:37,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:37,336 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-09-23 19:36:37,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:37,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:37,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:37,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:37,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:37,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:38,298 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:38,298 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:36:38,305 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:36:38,375 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-23 19:36:38,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:38,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:38,419 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:38,420 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-23 19:36:38,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 19:36:38,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 19:36:38,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:36:38,421 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-09-23 19:36:38,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:38,505 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-23 19:36:38,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:36:38,505 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-23 19:36:38,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:38,506 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:36:38,506 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:36:38,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:36:38,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:36:38,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-23 19:36:38,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-23 19:36:38,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-23 19:36:38,512 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-09-23 19:36:38,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:38,512 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-23 19:36:38,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 19:36:38,512 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-23 19:36:38,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-23 19:36:38,513 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:38,513 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-09-23 19:36:38,513 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:38,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:38,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-09-23 19:36:38,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:38,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:38,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:38,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:38,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:39,195 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:39,196 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:39,196 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 [2018-09-23 19:36:39,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:39,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:39,250 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:39,281 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:39,281 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 19:36:39,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 19:36:39,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 19:36:39,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:36:39,282 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-09-23 19:36:39,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:39,324 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-23 19:36:39,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 19:36:39,325 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-23 19:36:39,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:39,325 INFO L225 Difference]: With dead ends: 59 [2018-09-23 19:36:39,326 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 19:36:39,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:36:39,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 19:36:39,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-23 19:36:39,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-23 19:36:39,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-23 19:36:39,330 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-09-23 19:36:39,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:39,330 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-23 19:36:39,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 19:36:39,330 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-23 19:36:39,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-23 19:36:39,331 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:39,331 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-09-23 19:36:39,331 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:39,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:39,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-09-23 19:36:39,331 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:39,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:39,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:39,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:39,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:40,397 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:40,397 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:40,397 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 [2018-09-23 19:36:40,412 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:36:40,443 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:36:40,443 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:40,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:40,456 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:40,476 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:40,476 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-23 19:36:40,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 19:36:40,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 19:36:40,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:36:40,477 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-09-23 19:36:40,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:40,552 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-23 19:36:40,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:36:40,552 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-23 19:36:40,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:40,553 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:36:40,553 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:36:40,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:36:40,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:36:40,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-23 19:36:40,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 19:36:40,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-23 19:36:40,557 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-09-23 19:36:40,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:40,557 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-23 19:36:40,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 19:36:40,558 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-23 19:36:40,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 19:36:40,558 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:40,558 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-09-23 19:36:40,559 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:40,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:40,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-09-23 19:36:40,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:40,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:40,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:40,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:40,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:40,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:41,206 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:41,206 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:36:41,214 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:36:41,315 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-23 19:36:41,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:41,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:41,330 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:41,353 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:41,353 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-23 19:36:41,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 19:36:41,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 19:36:41,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:36:41,354 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-09-23 19:36:41,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:41,514 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-23 19:36:41,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 19:36:41,514 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-23 19:36:41,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:41,515 INFO L225 Difference]: With dead ends: 63 [2018-09-23 19:36:41,515 INFO L226 Difference]: Without dead ends: 61 [2018-09-23 19:36:41,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:36:41,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-23 19:36:41,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-23 19:36:41,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-23 19:36:41,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-23 19:36:41,520 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-09-23 19:36:41,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:41,520 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-23 19:36:41,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 19:36:41,521 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-23 19:36:41,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-23 19:36:41,521 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:41,521 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-09-23 19:36:41,521 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:41,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:41,522 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-09-23 19:36:41,522 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:41,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:41,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:41,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:41,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:41,943 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:41,943 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:41,943 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 [2018-09-23 19:36:41,952 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:36:41,984 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:36:41,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:41,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:41,996 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:42,017 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:42,017 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-23 19:36:42,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 19:36:42,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 19:36:42,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:36:42,018 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-09-23 19:36:42,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:42,152 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-23 19:36:42,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 19:36:42,152 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-23 19:36:42,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:42,153 INFO L225 Difference]: With dead ends: 65 [2018-09-23 19:36:42,153 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 19:36:42,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:36:42,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 19:36:42,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-23 19:36:42,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-23 19:36:42,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-23 19:36:42,157 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-09-23 19:36:42,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:42,158 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-23 19:36:42,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 19:36:42,158 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-23 19:36:42,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 19:36:42,158 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:42,159 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-09-23 19:36:42,159 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:42,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:42,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-09-23 19:36:42,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:42,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:42,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:42,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:42,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:42,935 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:42,936 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:42,936 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:36:42,955 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:36:43,134 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-23 19:36:43,134 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:43,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:43,148 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:43,169 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:43,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 19:36:43,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 19:36:43,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 19:36:43,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:36:43,170 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-09-23 19:36:43,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:43,240 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-23 19:36:43,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 19:36:43,241 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-23 19:36:43,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:43,241 INFO L225 Difference]: With dead ends: 67 [2018-09-23 19:36:43,242 INFO L226 Difference]: Without dead ends: 65 [2018-09-23 19:36:43,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:36:43,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-23 19:36:43,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-23 19:36:43,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-23 19:36:43,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-23 19:36:43,245 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-09-23 19:36:43,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:43,246 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-23 19:36:43,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 19:36:43,246 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-23 19:36:43,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-23 19:36:43,246 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:43,246 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-09-23 19:36:43,247 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:43,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:43,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-09-23 19:36:43,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:43,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:43,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:43,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:43,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:43,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:43,813 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:43,813 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:36:43,822 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:36:43,927 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-23 19:36:43,927 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:43,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:43,940 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:43,961 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:43,961 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-23 19:36:43,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 19:36:43,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 19:36:43,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:36:43,962 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-09-23 19:36:44,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:44,103 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-23 19:36:44,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 19:36:44,103 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-23 19:36:44,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:44,104 INFO L225 Difference]: With dead ends: 69 [2018-09-23 19:36:44,105 INFO L226 Difference]: Without dead ends: 67 [2018-09-23 19:36:44,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:36:44,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-23 19:36:44,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-23 19:36:44,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-23 19:36:44,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-23 19:36:44,109 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-09-23 19:36:44,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:44,109 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-23 19:36:44,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 19:36:44,109 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-23 19:36:44,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-23 19:36:44,110 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:44,110 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-09-23 19:36:44,110 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:44,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:44,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-09-23 19:36:44,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:44,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:44,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:44,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:44,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:44,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:44,828 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:44,829 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:44,829 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 [2018-09-23 19:36:44,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:44,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:44,893 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:44,913 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:44,913 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-23 19:36:44,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 19:36:44,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 19:36:44,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:36:44,915 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-09-23 19:36:44,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:44,976 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-23 19:36:44,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 19:36:44,976 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-23 19:36:44,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:44,977 INFO L225 Difference]: With dead ends: 71 [2018-09-23 19:36:44,977 INFO L226 Difference]: Without dead ends: 69 [2018-09-23 19:36:44,979 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:36:44,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-23 19:36:44,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-23 19:36:44,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-23 19:36:44,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-23 19:36:44,981 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-09-23 19:36:44,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:44,982 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-23 19:36:44,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 19:36:44,982 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-23 19:36:44,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-23 19:36:44,982 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:44,982 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-09-23 19:36:44,983 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:44,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:44,983 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-09-23 19:36:44,983 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:44,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:44,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:44,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:44,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:45,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:45,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:45,733 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 [2018-09-23 19:36:45,741 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:36:45,775 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:36:45,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:45,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:45,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:45,814 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:45,815 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-23 19:36:45,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 19:36:45,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 19:36:45,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:36:45,816 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-09-23 19:36:45,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:45,876 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-23 19:36:45,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 19:36:45,876 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-23 19:36:45,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:45,877 INFO L225 Difference]: With dead ends: 73 [2018-09-23 19:36:45,877 INFO L226 Difference]: Without dead ends: 71 [2018-09-23 19:36:45,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:36:45,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-23 19:36:45,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-23 19:36:45,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-23 19:36:45,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-23 19:36:45,881 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-09-23 19:36:45,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:45,882 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-23 19:36:45,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 19:36:45,882 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-23 19:36:45,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-23 19:36:45,882 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:45,882 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-09-23 19:36:45,883 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:45,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:45,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-09-23 19:36:45,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:45,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:45,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:45,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:45,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:45,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:46,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:46,489 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:46,489 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 [2018-09-23 19:36:46,497 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:36:46,636 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-23 19:36:46,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:46,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:46,674 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:46,674 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-23 19:36:46,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 19:36:46,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 19:36:46,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:36:46,675 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-09-23 19:36:46,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:46,759 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-23 19:36:46,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 19:36:46,760 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-23 19:36:46,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:46,760 INFO L225 Difference]: With dead ends: 75 [2018-09-23 19:36:46,760 INFO L226 Difference]: Without dead ends: 73 [2018-09-23 19:36:46,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:36:46,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-23 19:36:46,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-23 19:36:46,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-23 19:36:46,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-23 19:36:46,763 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-09-23 19:36:46,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:46,764 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-23 19:36:46,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 19:36:46,764 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-23 19:36:46,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-23 19:36:46,764 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:46,764 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-09-23 19:36:46,765 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:46,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:46,765 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-09-23 19:36:46,765 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:46,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:46,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:46,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:46,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:47,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:47,615 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:47,615 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 [2018-09-23 19:36:47,622 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:36:47,662 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:36:47,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:47,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:47,713 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:47,713 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-23 19:36:47,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 19:36:47,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 19:36:47,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:36:47,714 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-09-23 19:36:47,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:47,843 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-23 19:36:47,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 19:36:47,843 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-23 19:36:47,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:47,844 INFO L225 Difference]: With dead ends: 77 [2018-09-23 19:36:47,844 INFO L226 Difference]: Without dead ends: 75 [2018-09-23 19:36:47,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:36:47,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-23 19:36:47,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-23 19:36:47,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-23 19:36:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-23 19:36:47,851 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-09-23 19:36:47,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:47,851 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-23 19:36:47,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 19:36:47,851 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-23 19:36:47,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-23 19:36:47,852 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:47,852 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-09-23 19:36:47,852 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:47,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:47,853 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-09-23 19:36:47,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:47,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:47,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:47,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:47,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:47,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:48,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:48,720 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:48,720 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:36:48,728 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:36:49,048 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-23 19:36:49,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:49,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:49,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:49,099 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:49,099 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 19:36:49,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 19:36:49,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 19:36:49,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:36:49,100 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-09-23 19:36:49,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:49,169 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-23 19:36:49,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 19:36:49,169 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-23 19:36:49,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:49,170 INFO L225 Difference]: With dead ends: 79 [2018-09-23 19:36:49,170 INFO L226 Difference]: Without dead ends: 77 [2018-09-23 19:36:49,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:36:49,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-23 19:36:49,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-23 19:36:49,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-23 19:36:49,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-23 19:36:49,174 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-09-23 19:36:49,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:49,174 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-23 19:36:49,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 19:36:49,174 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-23 19:36:49,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-23 19:36:49,175 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:49,175 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-09-23 19:36:49,175 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:49,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:49,175 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-09-23 19:36:49,176 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:49,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:49,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:49,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:49,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:50,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:50,000 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:50,000 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 [2018-09-23 19:36:50,008 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:36:50,165 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-23 19:36:50,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:50,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:50,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:50,214 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:50,214 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-23 19:36:50,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 19:36:50,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 19:36:50,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:36:50,216 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-09-23 19:36:50,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:50,622 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-23 19:36:50,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 19:36:50,624 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-23 19:36:50,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:50,624 INFO L225 Difference]: With dead ends: 81 [2018-09-23 19:36:50,624 INFO L226 Difference]: Without dead ends: 79 [2018-09-23 19:36:50,625 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:36:50,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-23 19:36:50,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-23 19:36:50,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-23 19:36:50,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-23 19:36:50,627 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-09-23 19:36:50,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:50,628 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-23 19:36:50,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 19:36:50,628 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-23 19:36:50,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-23 19:36:50,628 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:50,628 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-09-23 19:36:50,629 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:50,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:50,629 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-09-23 19:36:50,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:50,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:50,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:50,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:50,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:50,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:51,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:51,359 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:51,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:36:51,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:51,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:51,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:51,448 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:51,449 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-23 19:36:51,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 19:36:51,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 19:36:51,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:36:51,450 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-09-23 19:36:51,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:51,532 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-23 19:36:51,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 19:36:51,533 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-23 19:36:51,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:51,534 INFO L225 Difference]: With dead ends: 83 [2018-09-23 19:36:51,534 INFO L226 Difference]: Without dead ends: 81 [2018-09-23 19:36:51,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:36:51,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-23 19:36:51,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-23 19:36:51,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-23 19:36:51,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-23 19:36:51,538 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-09-23 19:36:51,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:51,539 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-23 19:36:51,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 19:36:51,539 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-23 19:36:51,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-23 19:36:51,539 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:51,539 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-09-23 19:36:51,539 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:51,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:51,540 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-09-23 19:36:51,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:51,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:51,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:51,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:51,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:51,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:52,310 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:52,310 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 [2018-09-23 19:36:52,317 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:36:52,367 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:36:52,367 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:52,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:52,410 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:52,411 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-23 19:36:52,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 19:36:52,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 19:36:52,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:36:52,412 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-09-23 19:36:52,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:52,496 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-23 19:36:52,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 19:36:52,497 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-23 19:36:52,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:52,498 INFO L225 Difference]: With dead ends: 85 [2018-09-23 19:36:52,498 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 19:36:52,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:36:52,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 19:36:52,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-23 19:36:52,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-23 19:36:52,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-23 19:36:52,502 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-09-23 19:36:52,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:52,503 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-23 19:36:52,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 19:36:52,503 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-23 19:36:52,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-23 19:36:52,503 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:52,503 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-09-23 19:36:52,503 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:52,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:52,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-09-23 19:36:52,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:52,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:52,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:52,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:52,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:52,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:53,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:53,543 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:53,543 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 [2018-09-23 19:36:53,551 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:36:53,753 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-23 19:36:53,753 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:53,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:53,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:53,793 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:53,794 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-23 19:36:53,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 19:36:53,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 19:36:53,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:36:53,795 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-09-23 19:36:53,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:53,923 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-23 19:36:53,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 19:36:53,923 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-23 19:36:53,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:53,924 INFO L225 Difference]: With dead ends: 87 [2018-09-23 19:36:53,924 INFO L226 Difference]: Without dead ends: 85 [2018-09-23 19:36:53,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:36:53,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-23 19:36:53,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-23 19:36:53,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-23 19:36:53,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-23 19:36:53,928 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-09-23 19:36:53,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:53,928 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-23 19:36:53,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 19:36:53,929 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-23 19:36:53,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-23 19:36:53,929 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:53,929 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-09-23 19:36:53,930 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:53,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:53,930 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-09-23 19:36:53,930 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:53,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:53,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:53,931 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:53,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:54,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:54,654 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:54,654 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:36:54,662 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:36:54,708 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:36:54,708 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:54,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:54,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:54,754 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:54,754 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-23 19:36:54,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 19:36:54,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 19:36:54,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:36:54,756 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-09-23 19:36:54,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:54,841 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-23 19:36:54,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 19:36:54,842 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-09-23 19:36:54,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:54,843 INFO L225 Difference]: With dead ends: 89 [2018-09-23 19:36:54,843 INFO L226 Difference]: Without dead ends: 87 [2018-09-23 19:36:54,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:36:54,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-23 19:36:54,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-23 19:36:54,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-23 19:36:54,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-23 19:36:54,848 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-09-23 19:36:54,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:54,849 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-23 19:36:54,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 19:36:54,849 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-23 19:36:54,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-23 19:36:54,849 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:54,849 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-09-23 19:36:54,850 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:54,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:54,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-09-23 19:36:54,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:54,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:54,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:54,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:54,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:56,311 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:56,311 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 [2018-09-23 19:36:56,318 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:36:56,855 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-23 19:36:56,855 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:56,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:56,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:56,908 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:56,909 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-23 19:36:56,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 19:36:56,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 19:36:56,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:36:56,910 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-09-23 19:36:57,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:57,039 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-23 19:36:57,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 19:36:57,039 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-23 19:36:57,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:57,040 INFO L225 Difference]: With dead ends: 91 [2018-09-23 19:36:57,040 INFO L226 Difference]: Without dead ends: 89 [2018-09-23 19:36:57,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:36:57,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-23 19:36:57,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-23 19:36:57,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-23 19:36:57,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-23 19:36:57,043 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-09-23 19:36:57,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:57,043 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-23 19:36:57,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 19:36:57,044 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-23 19:36:57,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-23 19:36:57,044 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:57,044 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-09-23 19:36:57,045 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:57,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:57,045 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-09-23 19:36:57,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:57,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:57,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:57,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:57,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:58,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:58,327 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:58,327 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 [2018-09-23 19:36:58,335 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:36:58,556 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-23 19:36:58,557 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:58,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:58,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:58,600 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:58,600 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-23 19:36:58,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 19:36:58,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 19:36:58,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:36:58,602 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-09-23 19:36:58,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:58,670 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-23 19:36:58,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 19:36:58,671 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-09-23 19:36:58,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:58,672 INFO L225 Difference]: With dead ends: 93 [2018-09-23 19:36:58,672 INFO L226 Difference]: Without dead ends: 91 [2018-09-23 19:36:58,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:36:58,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-23 19:36:58,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-23 19:36:58,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-23 19:36:58,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-23 19:36:58,676 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-09-23 19:36:58,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:58,677 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-23 19:36:58,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 19:36:58,677 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-23 19:36:58,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-23 19:36:58,677 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:58,677 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-09-23 19:36:58,677 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:58,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:58,678 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-09-23 19:36:58,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:58,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:58,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:58,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:58,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:58,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:01,710 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:01,710 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 [2018-09-23 19:37:01,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:01,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:01,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:01,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:01,799 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:01,800 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-23 19:37:01,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 19:37:01,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 19:37:01,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:37:01,801 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-09-23 19:37:01,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:01,884 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-23 19:37:01,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 19:37:01,884 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-23 19:37:01,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:01,885 INFO L225 Difference]: With dead ends: 95 [2018-09-23 19:37:01,886 INFO L226 Difference]: Without dead ends: 93 [2018-09-23 19:37:01,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:37:01,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-23 19:37:01,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-23 19:37:01,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-23 19:37:01,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-23 19:37:01,890 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-09-23 19:37:01,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:01,890 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-23 19:37:01,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 19:37:01,890 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-23 19:37:01,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-23 19:37:01,891 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:01,891 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-09-23 19:37:01,891 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:01,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:01,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-09-23 19:37:01,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:01,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:01,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:01,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:01,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:01,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:02,764 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:02,764 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 [2018-09-23 19:37:02,772 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:37:02,820 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:37:02,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:02,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:02,872 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:02,872 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-23 19:37:02,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 19:37:02,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 19:37:02,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:37:02,874 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-09-23 19:37:03,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:03,426 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-23 19:37:03,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 19:37:03,426 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-09-23 19:37:03,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:03,427 INFO L225 Difference]: With dead ends: 97 [2018-09-23 19:37:03,427 INFO L226 Difference]: Without dead ends: 95 [2018-09-23 19:37:03,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:37:03,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-23 19:37:03,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-23 19:37:03,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-23 19:37:03,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-23 19:37:03,431 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-09-23 19:37:03,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:03,431 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-23 19:37:03,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 19:37:03,431 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-23 19:37:03,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-23 19:37:03,432 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:03,432 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-09-23 19:37:03,432 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:03,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:03,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-09-23 19:37:03,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:03,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:03,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:03,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:03,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:03,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:04,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:04,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:04,579 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 [2018-09-23 19:37:04,589 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:37:04,937 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-23 19:37:04,937 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:04,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:04,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:04,991 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:04,991 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-23 19:37:04,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 19:37:04,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 19:37:04,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:37:04,993 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-09-23 19:37:05,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:05,085 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-23 19:37:05,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 19:37:05,086 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-23 19:37:05,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:05,087 INFO L225 Difference]: With dead ends: 99 [2018-09-23 19:37:05,087 INFO L226 Difference]: Without dead ends: 97 [2018-09-23 19:37:05,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:37:05,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-23 19:37:05,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-23 19:37:05,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-23 19:37:05,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-23 19:37:05,090 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-09-23 19:37:05,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:05,091 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-23 19:37:05,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 19:37:05,091 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-23 19:37:05,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-23 19:37:05,091 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:05,091 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-09-23 19:37:05,092 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:05,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:05,092 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-09-23 19:37:05,092 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:05,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:05,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:05,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:05,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:05,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:06,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:06,080 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:06,080 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 [2018-09-23 19:37:06,088 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:37:06,139 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:37:06,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:06,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:06,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:06,185 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:06,186 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-23 19:37:06,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 19:37:06,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 19:37:06,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:37:06,187 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-09-23 19:37:06,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:06,280 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-23 19:37:06,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 19:37:06,281 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-09-23 19:37:06,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:06,282 INFO L225 Difference]: With dead ends: 101 [2018-09-23 19:37:06,282 INFO L226 Difference]: Without dead ends: 99 [2018-09-23 19:37:06,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:37:06,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-23 19:37:06,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-23 19:37:06,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-23 19:37:06,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-23 19:37:06,286 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-09-23 19:37:06,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:06,286 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-23 19:37:06,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 19:37:06,286 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-23 19:37:06,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 19:37:06,286 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:06,287 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-09-23 19:37:06,287 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:06,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:06,287 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-09-23 19:37:06,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:06,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:06,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:06,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:06,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:06,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:07,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:07,323 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:07,323 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 [2018-09-23 19:37:07,330 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:37:08,229 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-23 19:37:08,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:08,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:08,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:08,288 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:08,289 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-23 19:37:08,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 19:37:08,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 19:37:08,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:37:08,290 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-09-23 19:37:08,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:08,483 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-23 19:37:08,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 19:37:08,483 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-23 19:37:08,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:08,484 INFO L225 Difference]: With dead ends: 103 [2018-09-23 19:37:08,484 INFO L226 Difference]: Without dead ends: 101 [2018-09-23 19:37:08,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:37:08,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-23 19:37:08,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-23 19:37:08,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-23 19:37:08,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-23 19:37:08,489 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-09-23 19:37:08,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:08,489 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-23 19:37:08,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 19:37:08,489 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-23 19:37:08,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-23 19:37:08,490 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:08,490 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-09-23 19:37:08,490 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:08,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:08,490 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-09-23 19:37:08,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:08,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:08,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:08,491 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:08,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:10,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:10,867 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:10,867 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 [2018-09-23 19:37:10,873 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:37:11,201 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-23 19:37:11,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:11,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:11,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:11,243 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:11,243 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-23 19:37:11,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 19:37:11,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 19:37:11,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:37:11,244 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-09-23 19:37:11,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:11,371 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-23 19:37:11,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 19:37:11,371 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-09-23 19:37:11,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:11,372 INFO L225 Difference]: With dead ends: 105 [2018-09-23 19:37:11,372 INFO L226 Difference]: Without dead ends: 103 [2018-09-23 19:37:11,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:37:11,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-23 19:37:11,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-23 19:37:11,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-23 19:37:11,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-23 19:37:11,377 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-09-23 19:37:11,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:11,377 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-23 19:37:11,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 19:37:11,377 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-23 19:37:11,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-23 19:37:11,378 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:11,378 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-09-23 19:37:11,378 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:11,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:11,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-09-23 19:37:11,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:11,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:11,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:11,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:11,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:12,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:12,424 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:12,424 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 [2018-09-23 19:37:12,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:12,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:12,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:12,545 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:12,546 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-23 19:37:12,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 19:37:12,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 19:37:12,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:37:12,547 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-09-23 19:37:13,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:13,267 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-23 19:37:13,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 19:37:13,267 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-23 19:37:13,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:13,268 INFO L225 Difference]: With dead ends: 107 [2018-09-23 19:37:13,268 INFO L226 Difference]: Without dead ends: 105 [2018-09-23 19:37:13,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:37:13,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-23 19:37:13,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-23 19:37:13,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-23 19:37:13,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-23 19:37:13,272 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-09-23 19:37:13,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:13,273 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-23 19:37:13,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 19:37:13,273 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-23 19:37:13,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-23 19:37:13,273 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:13,274 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-09-23 19:37:13,274 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:13,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:13,274 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-09-23 19:37:13,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:13,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:13,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:13,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:13,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:13,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:14,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:14,643 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:14,643 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 [2018-09-23 19:37:14,653 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:37:14,703 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:37:14,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:14,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:14,747 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:14,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-23 19:37:14,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 19:37:14,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 19:37:14,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:37:14,748 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-09-23 19:37:14,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:14,942 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-23 19:37:14,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 19:37:14,942 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-09-23 19:37:14,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:14,944 INFO L225 Difference]: With dead ends: 109 [2018-09-23 19:37:14,944 INFO L226 Difference]: Without dead ends: 107 [2018-09-23 19:37:14,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:37:14,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-23 19:37:14,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-23 19:37:14,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-23 19:37:14,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-23 19:37:14,949 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-09-23 19:37:14,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:14,950 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-23 19:37:14,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 19:37:14,950 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-23 19:37:14,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-23 19:37:14,950 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:14,950 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-09-23 19:37:14,951 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:14,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:14,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-09-23 19:37:14,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:14,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:14,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:14,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:14,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:16,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:16,472 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:16,473 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 [2018-09-23 19:37:16,480 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:37:16,910 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-23 19:37:16,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:16,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:16,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:16,969 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:16,970 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-23 19:37:16,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 19:37:16,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 19:37:16,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:37:16,974 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-09-23 19:37:17,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:17,164 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-23 19:37:17,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 19:37:17,165 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-23 19:37:17,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:17,166 INFO L225 Difference]: With dead ends: 111 [2018-09-23 19:37:17,166 INFO L226 Difference]: Without dead ends: 109 [2018-09-23 19:37:17,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:37:17,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-23 19:37:17,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-23 19:37:17,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-23 19:37:17,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-23 19:37:17,171 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-09-23 19:37:17,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:17,171 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-23 19:37:17,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 19:37:17,171 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-23 19:37:17,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-23 19:37:17,171 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:17,171 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-09-23 19:37:17,172 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:17,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:17,172 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-09-23 19:37:17,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:17,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:17,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:17,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:17,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:18,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:18,347 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:18,347 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 [2018-09-23 19:37:18,362 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:37:18,424 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:37:18,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:18,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:18,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:18,479 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:18,479 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-23 19:37:18,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 19:37:18,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 19:37:18,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:37:18,481 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-09-23 19:37:18,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:18,726 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-23 19:37:18,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 19:37:18,727 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-09-23 19:37:18,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:18,728 INFO L225 Difference]: With dead ends: 113 [2018-09-23 19:37:18,728 INFO L226 Difference]: Without dead ends: 111 [2018-09-23 19:37:18,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:37:18,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-23 19:37:18,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-23 19:37:18,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-23 19:37:18,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-23 19:37:18,732 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-09-23 19:37:18,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:18,733 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-23 19:37:18,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 19:37:18,733 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-23 19:37:18,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-23 19:37:18,733 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:18,734 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-09-23 19:37:18,734 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:18,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:18,734 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-09-23 19:37:18,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:18,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:18,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:18,735 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:18,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:19,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:19,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:19,952 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:37:19,968 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:37:21,387 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-23 19:37:21,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:21,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:21,431 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:21,431 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-23 19:37:21,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 19:37:21,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 19:37:21,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:37:21,432 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-09-23 19:37:21,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:21,514 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-23 19:37:21,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 19:37:21,514 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-23 19:37:21,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:21,515 INFO L225 Difference]: With dead ends: 115 [2018-09-23 19:37:21,516 INFO L226 Difference]: Without dead ends: 113 [2018-09-23 19:37:21,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:37:21,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-23 19:37:21,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-23 19:37:21,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-23 19:37:21,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-23 19:37:21,519 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-09-23 19:37:21,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:21,520 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-23 19:37:21,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 19:37:21,520 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-23 19:37:21,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-23 19:37:21,520 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:21,520 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-09-23 19:37:21,521 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:21,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:21,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-09-23 19:37:21,521 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:21,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:21,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:21,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:21,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:21,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:22,744 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:22,744 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 [2018-09-23 19:37:22,751 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:37:23,184 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-23 19:37:23,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:23,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:23,239 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:23,240 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-23 19:37:23,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 19:37:23,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 19:37:23,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:37:23,241 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-09-23 19:37:23,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:23,466 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-23 19:37:23,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 19:37:23,466 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-09-23 19:37:23,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:23,467 INFO L225 Difference]: With dead ends: 117 [2018-09-23 19:37:23,467 INFO L226 Difference]: Without dead ends: 115 [2018-09-23 19:37:23,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:37:23,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-23 19:37:23,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-23 19:37:23,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-23 19:37:23,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-23 19:37:23,471 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-09-23 19:37:23,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:23,471 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-23 19:37:23,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 19:37:23,471 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-23 19:37:23,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-23 19:37:23,472 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:23,472 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-09-23 19:37:23,472 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:23,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:23,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-09-23 19:37:23,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:23,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:23,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:23,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:23,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:24,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:24,904 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:24,904 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 [2018-09-23 19:37:24,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:24,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:24,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:25,025 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:25,026 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-23 19:37:25,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 19:37:25,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 19:37:25,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:37:25,027 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-09-23 19:37:25,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:25,424 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-23 19:37:25,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 19:37:25,427 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-23 19:37:25,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:25,428 INFO L225 Difference]: With dead ends: 119 [2018-09-23 19:37:25,428 INFO L226 Difference]: Without dead ends: 117 [2018-09-23 19:37:25,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:37:25,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-23 19:37:25,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-23 19:37:25,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-23 19:37:25,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-23 19:37:25,431 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-09-23 19:37:25,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:25,431 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-23 19:37:25,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 19:37:25,432 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-23 19:37:25,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-23 19:37:25,432 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:25,432 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-09-23 19:37:25,433 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:25,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:25,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-09-23 19:37:25,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:25,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:25,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:25,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:25,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:25,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:26,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:26,833 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:26,833 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 [2018-09-23 19:37:26,841 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:37:26,901 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:37:26,901 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:26,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:26,961 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:26,961 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-23 19:37:26,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 19:37:26,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 19:37:26,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:37:26,962 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-09-23 19:37:27,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:27,227 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-23 19:37:27,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 19:37:27,227 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-09-23 19:37:27,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:27,228 INFO L225 Difference]: With dead ends: 121 [2018-09-23 19:37:27,228 INFO L226 Difference]: Without dead ends: 119 [2018-09-23 19:37:27,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:37:27,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-23 19:37:27,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-23 19:37:27,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-23 19:37:27,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-23 19:37:27,232 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-09-23 19:37:27,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:27,232 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-23 19:37:27,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 19:37:27,232 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-23 19:37:27,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-23 19:37:27,232 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:27,232 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-09-23 19:37:27,233 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:27,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:27,233 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-09-23 19:37:27,233 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:27,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:27,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:27,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:27,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:27,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:28,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:28,571 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:28,571 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:37:28,578 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:37:29,189 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-23 19:37:29,189 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:29,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:29,255 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:29,255 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-23 19:37:29,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 19:37:29,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 19:37:29,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:37:29,256 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-09-23 19:37:29,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:29,739 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-23 19:37:29,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 19:37:29,741 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-09-23 19:37:29,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:29,742 INFO L225 Difference]: With dead ends: 123 [2018-09-23 19:37:29,742 INFO L226 Difference]: Without dead ends: 121 [2018-09-23 19:37:29,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:37:29,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-23 19:37:29,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-23 19:37:29,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-23 19:37:29,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-09-23 19:37:29,746 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-09-23 19:37:29,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:29,747 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-09-23 19:37:29,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 19:37:29,747 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-09-23 19:37:29,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-23 19:37:29,748 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:29,748 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-09-23 19:37:29,748 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:29,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:29,748 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-09-23 19:37:29,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:29,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:29,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:29,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:29,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:31,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:31,182 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:31,183 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:37:31,192 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:37:31,257 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:37:31,257 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:31,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:31,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:31,335 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:31,335 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-23 19:37:31,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-23 19:37:31,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-23 19:37:31,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:37:31,336 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-09-23 19:37:32,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:32,352 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-23 19:37:32,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 19:37:32,353 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-09-23 19:37:32,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:32,354 INFO L225 Difference]: With dead ends: 125 [2018-09-23 19:37:32,354 INFO L226 Difference]: Without dead ends: 123 [2018-09-23 19:37:32,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:37:32,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-23 19:37:32,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-23 19:37:32,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-23 19:37:32,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-23 19:37:32,358 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-09-23 19:37:32,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:32,358 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-23 19:37:32,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-23 19:37:32,359 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-23 19:37:32,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-23 19:37:32,359 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:32,359 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-09-23 19:37:32,360 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:32,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:32,360 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-09-23 19:37:32,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:32,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:32,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:32,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:32,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:33,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:33,949 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:33,949 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 [2018-09-23 19:37:33,956 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:37:36,188 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-23 19:37:36,188 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:36,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:36,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:36,253 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:36,253 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-23 19:37:36,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 19:37:36,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 19:37:36,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:37:36,254 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-09-23 19:37:36,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:36,435 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-23 19:37:36,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 19:37:36,435 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-09-23 19:37:36,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:36,436 INFO L225 Difference]: With dead ends: 127 [2018-09-23 19:37:36,436 INFO L226 Difference]: Without dead ends: 125 [2018-09-23 19:37:36,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:37:36,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-23 19:37:36,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-23 19:37:36,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-23 19:37:36,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-09-23 19:37:36,440 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-09-23 19:37:36,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:36,440 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-09-23 19:37:36,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 19:37:36,441 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-09-23 19:37:36,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-23 19:37:36,441 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:36,441 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-09-23 19:37:36,442 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:36,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:36,442 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-09-23 19:37:36,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:36,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:36,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:36,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:36,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:36,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:38,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:38,047 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:38,047 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 [2018-09-23 19:37:38,056 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:37:38,684 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-23 19:37:38,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:38,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:38,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:38,747 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:38,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-23 19:37:38,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-23 19:37:38,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-23 19:37:38,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:37:38,748 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-09-23 19:37:39,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:39,063 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-23 19:37:39,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 19:37:39,064 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-09-23 19:37:39,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:39,064 INFO L225 Difference]: With dead ends: 129 [2018-09-23 19:37:39,064 INFO L226 Difference]: Without dead ends: 127 [2018-09-23 19:37:39,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:37:39,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-23 19:37:39,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-23 19:37:39,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-23 19:37:39,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-23 19:37:39,067 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-09-23 19:37:39,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:39,067 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-23 19:37:39,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-23 19:37:39,068 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-23 19:37:39,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-23 19:37:39,068 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:39,068 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-09-23 19:37:39,069 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:39,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:39,069 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-09-23 19:37:39,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:39,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:39,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:39,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:39,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:39,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:40,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:40,708 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:40,709 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:40,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:40,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:40,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:40,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:40,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:40,855 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-23 19:37:40,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 19:37:40,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 19:37:40,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:37:40,856 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-09-23 19:37:41,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:41,359 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-23 19:37:41,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 19:37:41,359 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-09-23 19:37:41,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:41,360 INFO L225 Difference]: With dead ends: 131 [2018-09-23 19:37:41,360 INFO L226 Difference]: Without dead ends: 129 [2018-09-23 19:37:41,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:37:41,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-23 19:37:41,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-23 19:37:41,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-23 19:37:41,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-09-23 19:37:41,363 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-09-23 19:37:41,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:41,363 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-09-23 19:37:41,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 19:37:41,363 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-09-23 19:37:41,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-23 19:37:41,364 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:41,364 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-09-23 19:37:41,364 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:41,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:41,365 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-09-23 19:37:41,365 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:41,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:41,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:41,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:41,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:42,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:42,888 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:42,888 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 [2018-09-23 19:37:42,896 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:37:42,962 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:37:42,962 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:42,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:42,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:43,017 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:43,017 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-23 19:37:43,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 19:37:43,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 19:37:43,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:37:43,019 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-09-23 19:37:43,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:43,160 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-23 19:37:43,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 19:37:43,160 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-09-23 19:37:43,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:43,161 INFO L225 Difference]: With dead ends: 133 [2018-09-23 19:37:43,161 INFO L226 Difference]: Without dead ends: 131 [2018-09-23 19:37:43,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:37:43,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-23 19:37:43,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-23 19:37:43,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-23 19:37:43,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-23 19:37:43,165 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-09-23 19:37:43,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:43,165 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-23 19:37:43,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 19:37:43,166 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-23 19:37:43,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-23 19:37:43,166 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:43,166 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-09-23 19:37:43,166 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:43,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:43,167 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-09-23 19:37:43,167 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:43,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:43,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:43,168 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:43,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:45,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:45,005 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:45,005 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:37:45,034 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:37:45,957 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-23 19:37:45,957 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:45,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:45,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:46,006 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:46,006 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-23 19:37:46,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 19:37:46,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 19:37:46,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:37:46,007 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-09-23 19:37:46,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:46,171 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-23 19:37:46,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 19:37:46,171 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-09-23 19:37:46,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:46,172 INFO L225 Difference]: With dead ends: 135 [2018-09-23 19:37:46,172 INFO L226 Difference]: Without dead ends: 133 [2018-09-23 19:37:46,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:37:46,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-23 19:37:46,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-23 19:37:46,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-23 19:37:46,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-09-23 19:37:46,176 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-09-23 19:37:46,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:46,177 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-09-23 19:37:46,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 19:37:46,177 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-09-23 19:37:46,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-23 19:37:46,177 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:46,178 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-09-23 19:37:46,178 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:46,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:46,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-09-23 19:37:46,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:46,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:46,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:46,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:46,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:46,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:47,786 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:47,786 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:37:47,796 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:37:47,862 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:37:47,862 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:47,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:47,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:47,909 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:47,909 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-23 19:37:47,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-23 19:37:47,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-23 19:37:47,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:37:47,911 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-09-23 19:37:48,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:48,034 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-23 19:37:48,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 19:37:48,035 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-09-23 19:37:48,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:48,036 INFO L225 Difference]: With dead ends: 137 [2018-09-23 19:37:48,036 INFO L226 Difference]: Without dead ends: 135 [2018-09-23 19:37:48,036 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:37:48,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-23 19:37:48,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-23 19:37:48,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-23 19:37:48,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-23 19:37:48,040 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-09-23 19:37:48,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:48,040 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-23 19:37:48,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-23 19:37:48,040 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-23 19:37:48,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-23 19:37:48,041 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:48,041 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-09-23 19:37:48,041 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:48,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:48,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-09-23 19:37:48,042 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:48,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:48,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:48,042 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:48,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:50,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:50,148 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:50,148 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 [2018-09-23 19:37:50,156 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:37:53,291 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-23 19:37:53,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:53,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:53,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:53,361 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:53,362 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-23 19:37:53,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 19:37:53,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 19:37:53,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:37:53,363 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-09-23 19:37:53,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:53,536 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-23 19:37:53,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 19:37:53,537 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-09-23 19:37:53,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:53,537 INFO L225 Difference]: With dead ends: 139 [2018-09-23 19:37:53,538 INFO L226 Difference]: Without dead ends: 137 [2018-09-23 19:37:53,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:37:53,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-23 19:37:53,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-23 19:37:53,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-23 19:37:53,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-09-23 19:37:53,541 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-09-23 19:37:53,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:53,541 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-09-23 19:37:53,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 19:37:53,541 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-09-23 19:37:53,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-23 19:37:53,542 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:53,542 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-09-23 19:37:53,542 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:53,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:53,542 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-09-23 19:37:53,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:53,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:53,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:53,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:53,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:55,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:55,647 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:55,647 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 [2018-09-23 19:37:55,655 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:37:56,534 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-23 19:37:56,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:56,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:56,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:56,604 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:56,604 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-23 19:37:56,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-23 19:37:56,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-23 19:37:56,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 19:37:56,606 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-09-23 19:37:56,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:56,746 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-23 19:37:56,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 19:37:56,746 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-09-23 19:37:56,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:56,747 INFO L225 Difference]: With dead ends: 141 [2018-09-23 19:37:56,748 INFO L226 Difference]: Without dead ends: 139 [2018-09-23 19:37:56,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 19:37:56,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-23 19:37:56,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-23 19:37:56,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-23 19:37:56,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-23 19:37:56,753 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-09-23 19:37:56,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:56,753 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-23 19:37:56,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-23 19:37:56,753 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-23 19:37:56,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-23 19:37:56,754 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:56,754 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-09-23 19:37:56,754 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:56,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:56,755 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-09-23 19:37:56,755 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:56,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:56,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:56,756 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:56,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:56,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:58,545 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:58,545 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:37:58,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:58,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:58,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:58,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:37:58,684 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:58,684 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-23 19:37:58,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 19:37:58,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 19:37:58,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:37:58,685 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-09-23 19:37:58,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:58,815 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-23 19:37:58,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 19:37:58,816 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-09-23 19:37:58,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:58,816 INFO L225 Difference]: With dead ends: 143 [2018-09-23 19:37:58,816 INFO L226 Difference]: Without dead ends: 141 [2018-09-23 19:37:58,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:37:58,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-23 19:37:58,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-23 19:37:58,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-23 19:37:58,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-09-23 19:37:58,820 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-09-23 19:37:58,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:58,820 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-09-23 19:37:58,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 19:37:58,820 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-09-23 19:37:58,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-23 19:37:58,821 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:58,821 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-09-23 19:37:58,821 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:58,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:58,821 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-09-23 19:37:58,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:58,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:58,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:58,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:58,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:58,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:01,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:38:01,017 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:01,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:38:01,024 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:38:01,094 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:38:01,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:01,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:01,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:38:01,141 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:01,141 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-23 19:38:01,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-23 19:38:01,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-23 19:38:01,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:38:01,142 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-09-23 19:38:01,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:01,264 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-23 19:38:01,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 19:38:01,265 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-09-23 19:38:01,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:01,266 INFO L225 Difference]: With dead ends: 145 [2018-09-23 19:38:01,266 INFO L226 Difference]: Without dead ends: 143 [2018-09-23 19:38:01,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:38:01,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-23 19:38:01,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-23 19:38:01,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-23 19:38:01,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-23 19:38:01,270 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-09-23 19:38:01,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:01,270 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-23 19:38:01,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-23 19:38:01,270 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-23 19:38:01,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-23 19:38:01,271 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:01,271 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-09-23 19:38:01,271 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:01,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:01,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-09-23 19:38:01,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:01,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:01,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:01,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:01,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:03,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:38:03,062 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:03,062 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 [2018-09-23 19:38:03,070 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:38:04,280 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-23 19:38:04,281 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:04,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:04,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:38:04,345 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:04,346 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-23 19:38:04,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 19:38:04,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 19:38:04,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:38:04,347 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-09-23 19:38:04,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:04,723 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-23 19:38:04,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-23 19:38:04,723 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-09-23 19:38:04,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:04,724 INFO L225 Difference]: With dead ends: 147 [2018-09-23 19:38:04,724 INFO L226 Difference]: Without dead ends: 145 [2018-09-23 19:38:04,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:38:04,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-23 19:38:04,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-23 19:38:04,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-23 19:38:04,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-09-23 19:38:04,728 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-09-23 19:38:04,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:04,729 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-09-23 19:38:04,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 19:38:04,729 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-09-23 19:38:04,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-23 19:38:04,729 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:04,729 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-09-23 19:38:04,729 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:04,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:04,730 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-09-23 19:38:04,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:04,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:04,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:04,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:04,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:04,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:38:06,680 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:06,680 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 [2018-09-23 19:38:06,688 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:38:06,761 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:38:06,761 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:06,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:38:06,810 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:06,810 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-23 19:38:06,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-23 19:38:06,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-23 19:38:06,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 19:38:06,812 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-09-23 19:38:07,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:07,000 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-23 19:38:07,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-23 19:38:07,001 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-09-23 19:38:07,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:07,002 INFO L225 Difference]: With dead ends: 149 [2018-09-23 19:38:07,002 INFO L226 Difference]: Without dead ends: 147 [2018-09-23 19:38:07,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 19:38:07,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-23 19:38:07,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-23 19:38:07,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-23 19:38:07,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-23 19:38:07,007 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-09-23 19:38:07,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:07,007 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-23 19:38:07,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-23 19:38:07,007 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-23 19:38:07,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-23 19:38:07,008 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:07,008 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-09-23 19:38:07,009 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:07,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:07,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-09-23 19:38:07,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:07,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:07,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:07,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:07,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:38:08,938 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:08,939 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:38:08,945 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:38:13,263 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-23 19:38:13,263 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:13,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:13,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:38:13,324 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:13,324 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-23 19:38:13,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-23 19:38:13,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-23 19:38:13,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:38:13,326 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-09-23 19:38:13,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:13,496 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-23 19:38:13,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-23 19:38:13,496 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-09-23 19:38:13,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:13,497 INFO L225 Difference]: With dead ends: 151 [2018-09-23 19:38:13,497 INFO L226 Difference]: Without dead ends: 149 [2018-09-23 19:38:13,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:38:13,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-23 19:38:13,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-23 19:38:13,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-23 19:38:13,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-09-23 19:38:13,502 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-09-23 19:38:13,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:13,503 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-09-23 19:38:13,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-23 19:38:13,503 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-09-23 19:38:13,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-23 19:38:13,504 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:13,504 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-09-23 19:38:13,504 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:13,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:13,504 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-09-23 19:38:13,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:13,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:13,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:13,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:13,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:15,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:38:15,899 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:15,899 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 [2018-09-23 19:38:15,907 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:38:16,989 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-23 19:38:16,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:16,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:17,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:38:17,043 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:17,044 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-23 19:38:17,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-23 19:38:17,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-23 19:38:17,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 19:38:17,045 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-09-23 19:38:17,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:17,183 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-23 19:38:17,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-23 19:38:17,183 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-09-23 19:38:17,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:17,185 INFO L225 Difference]: With dead ends: 153 [2018-09-23 19:38:17,185 INFO L226 Difference]: Without dead ends: 151 [2018-09-23 19:38:17,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 19:38:17,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-23 19:38:17,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-23 19:38:17,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-23 19:38:17,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-23 19:38:17,190 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-09-23 19:38:17,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:17,191 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-23 19:38:17,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-23 19:38:17,191 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-23 19:38:17,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-23 19:38:17,191 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:17,192 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-09-23 19:38:17,192 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:17,192 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:17,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-09-23 19:38:17,192 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:17,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:17,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:17,193 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:17,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:17,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:19,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:38:19,232 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:19,232 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 [2018-09-23 19:38:19,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:38:19,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:19,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:19,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:38:19,368 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:19,369 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-23 19:38:19,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-23 19:38:19,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-23 19:38:19,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 19:38:19,370 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-09-23 19:38:19,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:19,569 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-23 19:38:19,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-23 19:38:19,570 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-09-23 19:38:19,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:19,571 INFO L225 Difference]: With dead ends: 155 [2018-09-23 19:38:19,571 INFO L226 Difference]: Without dead ends: 153 [2018-09-23 19:38:19,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 19:38:19,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-23 19:38:19,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-23 19:38:19,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-23 19:38:19,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-09-23 19:38:19,574 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-09-23 19:38:19,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:19,575 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-09-23 19:38:19,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-23 19:38:19,575 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-09-23 19:38:19,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-23 19:38:19,576 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:19,576 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-09-23 19:38:19,576 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:19,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:19,576 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-09-23 19:38:19,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:19,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:19,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:19,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:38:19,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:19,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:22,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:38:22,070 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:22,070 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 [2018-09-23 19:38:22,077 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:38:22,155 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:38:22,155 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:22,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:22,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:38:22,208 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:22,208 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-23 19:38:22,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-23 19:38:22,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-23 19:38:22,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 19:38:22,210 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2018-09-23 19:38:22,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:22,428 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-23 19:38:22,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 19:38:22,428 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-09-23 19:38:22,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:22,429 INFO L225 Difference]: With dead ends: 157 [2018-09-23 19:38:22,429 INFO L226 Difference]: Without dead ends: 155 [2018-09-23 19:38:22,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 19:38:22,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-23 19:38:22,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-23 19:38:22,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-23 19:38:22,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-09-23 19:38:22,432 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2018-09-23 19:38:22,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:22,432 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-09-23 19:38:22,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-23 19:38:22,432 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-09-23 19:38:22,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-23 19:38:22,433 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:22,433 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-09-23 19:38:22,433 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:22,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:22,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 75 times [2018-09-23 19:38:22,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:22,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:22,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:22,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:22,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:24,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:38:24,690 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:24,690 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 [2018-09-23 19:38:24,698 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:38:26,256 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-23 19:38:26,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:26,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:26,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:38:26,313 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:26,314 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-23 19:38:26,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-23 19:38:26,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-23 19:38:26,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:38:26,315 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2018-09-23 19:38:26,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:26,539 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-23 19:38:26,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-23 19:38:26,539 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-09-23 19:38:26,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:26,540 INFO L225 Difference]: With dead ends: 159 [2018-09-23 19:38:26,540 INFO L226 Difference]: Without dead ends: 157 [2018-09-23 19:38:26,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:38:26,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-23 19:38:26,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-23 19:38:26,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-23 19:38:26,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-09-23 19:38:26,543 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2018-09-23 19:38:26,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:26,543 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-09-23 19:38:26,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-23 19:38:26,543 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-09-23 19:38:26,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-23 19:38:26,544 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:26,544 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1] [2018-09-23 19:38:26,544 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:26,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:26,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1961675265, now seen corresponding path program 76 times [2018-09-23 19:38:26,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:26,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:26,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:26,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:26,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:26,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:28,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:38:28,754 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:28,754 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:38:28,761 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:38:28,839 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:38:28,839 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:28,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:28,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:38:28,886 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:28,887 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-23 19:38:28,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-23 19:38:28,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-23 19:38:28,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 19:38:28,888 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2018-09-23 19:38:29,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:29,112 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-23 19:38:29,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-23 19:38:29,113 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-09-23 19:38:29,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:29,114 INFO L225 Difference]: With dead ends: 161 [2018-09-23 19:38:29,114 INFO L226 Difference]: Without dead ends: 159 [2018-09-23 19:38:29,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 19:38:29,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-23 19:38:29,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-23 19:38:29,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-23 19:38:29,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-09-23 19:38:29,118 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2018-09-23 19:38:29,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:29,119 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-09-23 19:38:29,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-23 19:38:29,119 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-09-23 19:38:29,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-23 19:38:29,119 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:29,119 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-09-23 19:38:29,120 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:29,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:29,120 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 77 times [2018-09-23 19:38:29,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:29,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:29,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:29,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:29,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:29,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:31,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:38:31,650 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:31,650 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:38:31,659 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:38:37,110 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-23 19:38:37,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:37,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:37,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:38:37,174 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:37,174 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-23 19:38:37,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-23 19:38:37,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-23 19:38:37,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 19:38:37,176 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2018-09-23 19:38:37,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:37,691 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-23 19:38:37,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-23 19:38:37,691 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-09-23 19:38:37,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:37,692 INFO L225 Difference]: With dead ends: 163 [2018-09-23 19:38:37,692 INFO L226 Difference]: Without dead ends: 161 [2018-09-23 19:38:37,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 19:38:37,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-23 19:38:37,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-23 19:38:37,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-23 19:38:37,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-09-23 19:38:37,697 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2018-09-23 19:38:37,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:37,697 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-09-23 19:38:37,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-23 19:38:37,697 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-09-23 19:38:37,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-23 19:38:37,698 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:37,698 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1] [2018-09-23 19:38:37,699 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:37,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:37,699 INFO L82 PathProgramCache]: Analyzing trace with hash -982073613, now seen corresponding path program 78 times [2018-09-23 19:38:37,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:37,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:37,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:37,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:37,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:37,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:40,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:38:40,197 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:40,197 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 [2018-09-23 19:38:40,205 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:38:41,647 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-23 19:38:41,647 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:41,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:41,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:38:41,703 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:41,703 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-23 19:38:41,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-23 19:38:41,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-23 19:38:41,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 19:38:41,705 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2018-09-23 19:38:41,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:41,860 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-23 19:38:41,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-23 19:38:41,860 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-09-23 19:38:41,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:41,861 INFO L225 Difference]: With dead ends: 165 [2018-09-23 19:38:41,862 INFO L226 Difference]: Without dead ends: 163 [2018-09-23 19:38:41,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 19:38:41,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-23 19:38:41,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-23 19:38:41,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-23 19:38:41,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-09-23 19:38:41,867 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2018-09-23 19:38:41,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:41,867 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-09-23 19:38:41,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-23 19:38:41,867 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-09-23 19:38:41,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-23 19:38:41,868 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:41,868 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-09-23 19:38:41,868 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:41,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:41,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 79 times [2018-09-23 19:38:41,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:41,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:41,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:41,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:41,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:44,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:38:44,184 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:44,184 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 [2018-09-23 19:38:44,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:38:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:44,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:44,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:38:44,326 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:44,327 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-23 19:38:44,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-23 19:38:44,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-23 19:38:44,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 19:38:44,328 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2018-09-23 19:38:44,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:44,573 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-09-23 19:38:44,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-23 19:38:44,573 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-09-23 19:38:44,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:44,574 INFO L225 Difference]: With dead ends: 167 [2018-09-23 19:38:44,574 INFO L226 Difference]: Without dead ends: 165 [2018-09-23 19:38:44,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 19:38:44,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-23 19:38:44,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-23 19:38:44,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-23 19:38:44,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-09-23 19:38:44,577 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2018-09-23 19:38:44,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:44,577 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-09-23 19:38:44,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-23 19:38:44,577 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-09-23 19:38:44,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-23 19:38:44,578 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:44,578 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1] [2018-09-23 19:38:44,579 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:44,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:44,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1606111769, now seen corresponding path program 80 times [2018-09-23 19:38:44,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:44,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:44,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:44,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:38:44,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:47,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:38:47,270 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:47,270 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:38:47,277 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:38:47,361 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:38:47,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:47,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:47,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:38:47,431 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:47,432 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-23 19:38:47,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-23 19:38:47,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-23 19:38:47,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 19:38:47,433 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2018-09-23 19:38:47,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:47,637 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-09-23 19:38:47,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-23 19:38:47,638 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-09-23 19:38:47,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:47,639 INFO L225 Difference]: With dead ends: 169 [2018-09-23 19:38:47,639 INFO L226 Difference]: Without dead ends: 167 [2018-09-23 19:38:47,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 19:38:47,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-23 19:38:47,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-23 19:38:47,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-23 19:38:47,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-09-23 19:38:47,642 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2018-09-23 19:38:47,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:47,642 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-09-23 19:38:47,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-23 19:38:47,642 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-09-23 19:38:47,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-23 19:38:47,643 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:47,643 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-09-23 19:38:47,643 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:47,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:47,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 81 times [2018-09-23 19:38:47,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:47,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:47,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:47,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:47,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:50,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:38:50,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:50,370 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 [2018-09-23 19:38:50,377 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:38:52,442 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-09-23 19:38:52,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:52,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:52,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:38:52,516 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:52,516 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-23 19:38:52,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-23 19:38:52,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-23 19:38:52,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 19:38:52,517 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2018-09-23 19:38:52,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:52,709 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-09-23 19:38:52,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-23 19:38:52,710 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-09-23 19:38:52,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:52,710 INFO L225 Difference]: With dead ends: 171 [2018-09-23 19:38:52,711 INFO L226 Difference]: Without dead ends: 169 [2018-09-23 19:38:52,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 19:38:52,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-23 19:38:52,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-23 19:38:52,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-23 19:38:52,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-09-23 19:38:52,714 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2018-09-23 19:38:52,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:52,714 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-09-23 19:38:52,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-23 19:38:52,715 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-09-23 19:38:52,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-23 19:38:52,715 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:52,715 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1] [2018-09-23 19:38:52,715 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:52,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:52,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1943667419, now seen corresponding path program 82 times [2018-09-23 19:38:52,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:52,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:52,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:52,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:52,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:52,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:55,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:38:55,221 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:55,221 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 [2018-09-23 19:38:55,228 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:38:55,310 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:38:55,311 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:55,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:55,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:38:55,382 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:55,382 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-23 19:38:55,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-23 19:38:55,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-23 19:38:55,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 19:38:55,384 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2018-09-23 19:38:55,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:55,719 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-09-23 19:38:55,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-23 19:38:55,719 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-09-23 19:38:55,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:55,720 INFO L225 Difference]: With dead ends: 173 [2018-09-23 19:38:55,720 INFO L226 Difference]: Without dead ends: 171 [2018-09-23 19:38:55,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 19:38:55,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-23 19:38:55,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-23 19:38:55,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-23 19:38:55,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-09-23 19:38:55,723 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2018-09-23 19:38:55,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:55,723 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-09-23 19:38:55,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-23 19:38:55,723 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-09-23 19:38:55,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-23 19:38:55,724 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:55,724 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-09-23 19:38:55,724 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:55,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:55,725 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 83 times [2018-09-23 19:38:55,725 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:55,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:55,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:55,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:55,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:55,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:58,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:38:58,412 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:58,412 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:38:58,420 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:39:05,820 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-09-23 19:39:05,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:05,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:05,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:05,903 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:05,903 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-23 19:39:05,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-23 19:39:05,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-23 19:39:05,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 19:39:05,905 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2018-09-23 19:39:06,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:06,191 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-09-23 19:39:06,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-23 19:39:06,191 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-09-23 19:39:06,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:06,192 INFO L225 Difference]: With dead ends: 175 [2018-09-23 19:39:06,192 INFO L226 Difference]: Without dead ends: 173 [2018-09-23 19:39:06,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 19:39:06,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-23 19:39:06,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-23 19:39:06,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-23 19:39:06,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-09-23 19:39:06,196 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2018-09-23 19:39:06,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:06,196 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-09-23 19:39:06,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-23 19:39:06,196 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-09-23 19:39:06,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-23 19:39:06,197 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:06,197 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1] [2018-09-23 19:39:06,198 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:06,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:06,198 INFO L82 PathProgramCache]: Analyzing trace with hash 571719119, now seen corresponding path program 84 times [2018-09-23 19:39:06,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:06,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:06,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:06,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:06,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:06,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:08,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:08,843 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:08,843 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 [2018-09-23 19:39:08,850 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:39:10,722 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-09-23 19:39:10,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:10,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:10,782 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:10,782 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-23 19:39:10,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-23 19:39:10,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-23 19:39:10,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 19:39:10,784 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2018-09-23 19:39:11,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:11,253 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-09-23 19:39:11,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-23 19:39:11,253 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-09-23 19:39:11,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:11,254 INFO L225 Difference]: With dead ends: 177 [2018-09-23 19:39:11,254 INFO L226 Difference]: Without dead ends: 175 [2018-09-23 19:39:11,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 19:39:11,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-23 19:39:11,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-23 19:39:11,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-23 19:39:11,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-09-23 19:39:11,258 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2018-09-23 19:39:11,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:11,259 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-09-23 19:39:11,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-23 19:39:11,259 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-09-23 19:39:11,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-23 19:39:11,260 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:11,260 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-09-23 19:39:11,260 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:11,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:11,260 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 85 times [2018-09-23 19:39:11,260 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:11,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:11,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:11,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:11,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:11,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:14,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:14,068 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:14,068 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 [2018-09-23 19:39:14,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:14,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:14,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:14,219 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:14,219 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-23 19:39:14,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-23 19:39:14,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-23 19:39:14,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 19:39:14,221 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2018-09-23 19:39:14,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:14,511 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-09-23 19:39:14,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-23 19:39:14,511 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-09-23 19:39:14,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:14,512 INFO L225 Difference]: With dead ends: 179 [2018-09-23 19:39:14,512 INFO L226 Difference]: Without dead ends: 177 [2018-09-23 19:39:14,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 19:39:14,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-23 19:39:14,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-09-23 19:39:14,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-23 19:39:14,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-09-23 19:39:14,515 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2018-09-23 19:39:14,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:14,516 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-09-23 19:39:14,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-23 19:39:14,516 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-09-23 19:39:14,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-23 19:39:14,517 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:14,517 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1] [2018-09-23 19:39:14,517 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:14,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:14,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1448009411, now seen corresponding path program 86 times [2018-09-23 19:39:14,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:14,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:14,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:14,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:14,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:17,601 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:17,601 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:39:17,608 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:39:17,697 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:39:17,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:17,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:17,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:17,754 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:17,754 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-23 19:39:17,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-23 19:39:17,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-23 19:39:17,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 19:39:17,756 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2018-09-23 19:39:17,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:17,935 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-09-23 19:39:17,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-23 19:39:17,935 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-09-23 19:39:17,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:17,937 INFO L225 Difference]: With dead ends: 181 [2018-09-23 19:39:17,937 INFO L226 Difference]: Without dead ends: 179 [2018-09-23 19:39:17,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 19:39:17,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-23 19:39:17,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-23 19:39:17,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-23 19:39:17,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-09-23 19:39:17,940 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2018-09-23 19:39:17,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:17,940 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-09-23 19:39:17,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-23 19:39:17,941 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-09-23 19:39:17,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-23 19:39:17,941 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:17,941 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-09-23 19:39:17,941 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:17,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:17,942 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 87 times [2018-09-23 19:39:17,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:17,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:17,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:17,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:17,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:17,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:20,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:20,878 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:20,878 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 [2018-09-23 19:39:20,886 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:39:23,583 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-09-23 19:39:23,583 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:23,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:23,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:23,656 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:23,657 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-23 19:39:23,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-23 19:39:23,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-23 19:39:23,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 19:39:23,658 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2018-09-23 19:39:23,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:23,951 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-09-23 19:39:23,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-23 19:39:23,952 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-09-23 19:39:23,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:23,953 INFO L225 Difference]: With dead ends: 183 [2018-09-23 19:39:23,953 INFO L226 Difference]: Without dead ends: 181 [2018-09-23 19:39:23,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 19:39:23,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-23 19:39:23,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-23 19:39:23,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-23 19:39:23,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-09-23 19:39:23,957 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2018-09-23 19:39:23,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:23,957 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-09-23 19:39:23,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-23 19:39:23,957 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-09-23 19:39:23,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-23 19:39:23,958 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:23,958 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1] [2018-09-23 19:39:23,958 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:23,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:23,959 INFO L82 PathProgramCache]: Analyzing trace with hash -983013961, now seen corresponding path program 88 times [2018-09-23 19:39:23,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:23,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:23,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:23,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:23,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:23,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:27,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:27,145 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:27,145 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:27,152 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:39:27,242 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:39:27,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:27,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:27,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:27,300 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:27,301 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-23 19:39:27,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-23 19:39:27,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-23 19:39:27,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 19:39:27,302 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2018-09-23 19:39:27,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:27,500 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-09-23 19:39:27,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-23 19:39:27,501 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-09-23 19:39:27,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:27,502 INFO L225 Difference]: With dead ends: 185 [2018-09-23 19:39:27,502 INFO L226 Difference]: Without dead ends: 183 [2018-09-23 19:39:27,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 19:39:27,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-23 19:39:27,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-09-23 19:39:27,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-23 19:39:27,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-09-23 19:39:27,506 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2018-09-23 19:39:27,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:27,506 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-09-23 19:39:27,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-23 19:39:27,506 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-09-23 19:39:27,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-23 19:39:27,507 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:27,507 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-09-23 19:39:27,507 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:27,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:27,507 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 89 times [2018-09-23 19:39:27,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:27,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:27,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:27,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:27,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:30,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:30,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:30,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:30,587 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:39:40,418 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-09-23 19:39:40,418 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:40,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:40,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:40,482 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:40,482 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-23 19:39:40,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-23 19:39:40,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-23 19:39:40,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 19:39:40,483 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2018-09-23 19:39:40,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:40,832 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-09-23 19:39:40,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-23 19:39:40,832 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-09-23 19:39:40,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:40,833 INFO L225 Difference]: With dead ends: 187 [2018-09-23 19:39:40,833 INFO L226 Difference]: Without dead ends: 185 [2018-09-23 19:39:40,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 19:39:40,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-23 19:39:40,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-23 19:39:40,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-23 19:39:40,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-09-23 19:39:40,836 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2018-09-23 19:39:40,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:40,837 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-09-23 19:39:40,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-23 19:39:40,837 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-09-23 19:39:40,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-23 19:39:40,837 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:40,837 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1] [2018-09-23 19:39:40,838 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:40,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:40,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1841124011, now seen corresponding path program 90 times [2018-09-23 19:39:40,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:40,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:40,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:40,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:40,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:40,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:44,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:44,079 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:44,079 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:44,088 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:39:46,449 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-09-23 19:39:46,449 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:46,456 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:46,513 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:46,513 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-23 19:39:46,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-23 19:39:46,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-23 19:39:46,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-23 19:39:46,515 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2018-09-23 19:39:46,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:46,775 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-09-23 19:39:46,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-23 19:39:46,775 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2018-09-23 19:39:46,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:46,776 INFO L225 Difference]: With dead ends: 189 [2018-09-23 19:39:46,776 INFO L226 Difference]: Without dead ends: 187 [2018-09-23 19:39:46,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-23 19:39:46,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-23 19:39:46,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-23 19:39:46,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-23 19:39:46,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-09-23 19:39:46,781 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2018-09-23 19:39:46,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:46,781 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-09-23 19:39:46,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-23 19:39:46,781 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-09-23 19:39:46,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-23 19:39:46,782 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:46,782 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-09-23 19:39:46,782 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:46,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:46,783 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 91 times [2018-09-23 19:39:46,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:46,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:46,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:46,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:46,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:50,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:50,083 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:50,083 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:50,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:50,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:50,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:50,243 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:50,243 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-23 19:39:50,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-23 19:39:50,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-23 19:39:50,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 19:39:50,244 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2018-09-23 19:39:50,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:50,434 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-09-23 19:39:50,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-23 19:39:50,435 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-09-23 19:39:50,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:50,436 INFO L225 Difference]: With dead ends: 191 [2018-09-23 19:39:50,436 INFO L226 Difference]: Without dead ends: 189 [2018-09-23 19:39:50,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 19:39:50,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-23 19:39:50,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-23 19:39:50,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-23 19:39:50,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-09-23 19:39:50,441 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2018-09-23 19:39:50,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:50,441 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-09-23 19:39:50,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-23 19:39:50,442 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-09-23 19:39:50,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-23 19:39:50,442 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:50,443 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1] [2018-09-23 19:39:50,443 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:50,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:50,443 INFO L82 PathProgramCache]: Analyzing trace with hash -685070945, now seen corresponding path program 92 times [2018-09-23 19:39:50,443 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:50,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:50,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:50,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:50,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:50,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:54,704 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:54,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:54,711 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:39:54,805 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:39:54,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:54,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:54,865 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:54,865 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-23 19:39:54,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-23 19:39:54,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-23 19:39:54,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 19:39:54,867 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2018-09-23 19:39:55,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:55,039 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-09-23 19:39:55,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-23 19:39:55,040 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2018-09-23 19:39:55,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:55,041 INFO L225 Difference]: With dead ends: 193 [2018-09-23 19:39:55,041 INFO L226 Difference]: Without dead ends: 191 [2018-09-23 19:39:55,042 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 19:39:55,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-23 19:39:55,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-23 19:39:55,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-23 19:39:55,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-09-23 19:39:55,046 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2018-09-23 19:39:55,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:55,047 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-09-23 19:39:55,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-23 19:39:55,047 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-09-23 19:39:55,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-23 19:39:55,048 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:55,048 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1] [2018-09-23 19:39:55,048 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:55,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:55,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1223129767, now seen corresponding path program 93 times [2018-09-23 19:39:55,049 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:55,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:55,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:55,050 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:55,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:58,430 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:58,431 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:58,454 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:40:01,933 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-09-23 19:40:01,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:01,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:01,999 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:02,000 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-23 19:40:02,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-23 19:40:02,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-23 19:40:02,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 19:40:02,002 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2018-09-23 19:40:02,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:02,220 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-09-23 19:40:02,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-23 19:40:02,220 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-09-23 19:40:02,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:02,221 INFO L225 Difference]: With dead ends: 195 [2018-09-23 19:40:02,221 INFO L226 Difference]: Without dead ends: 193 [2018-09-23 19:40:02,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 19:40:02,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-23 19:40:02,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-23 19:40:02,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-23 19:40:02,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-09-23 19:40:02,225 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2018-09-23 19:40:02,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:02,225 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-09-23 19:40:02,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-23 19:40:02,225 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-09-23 19:40:02,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-23 19:40:02,226 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:02,226 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1] [2018-09-23 19:40:02,226 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:02,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:02,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1393385107, now seen corresponding path program 94 times [2018-09-23 19:40:02,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:02,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:02,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:02,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:02,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:05,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:05,668 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:05,668 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:05,675 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:40:05,772 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:40:05,773 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:05,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:05,850 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:05,850 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-23 19:40:05,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-23 19:40:05,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-23 19:40:05,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-23 19:40:05,851 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2018-09-23 19:40:06,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:06,181 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-09-23 19:40:06,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-23 19:40:06,182 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2018-09-23 19:40:06,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:06,183 INFO L225 Difference]: With dead ends: 197 [2018-09-23 19:40:06,183 INFO L226 Difference]: Without dead ends: 195 [2018-09-23 19:40:06,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-23 19:40:06,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-23 19:40:06,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-23 19:40:06,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-23 19:40:06,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-09-23 19:40:06,186 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2018-09-23 19:40:06,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:06,186 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-09-23 19:40:06,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-23 19:40:06,187 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-09-23 19:40:06,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-23 19:40:06,187 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:06,187 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1] [2018-09-23 19:40:06,187 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:06,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:06,188 INFO L82 PathProgramCache]: Analyzing trace with hash -986656435, now seen corresponding path program 95 times [2018-09-23 19:40:06,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:06,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:06,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:06,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:06,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:06,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:09,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:09,794 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:09,794 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:09,804 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:40:22,192 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-09-23 19:40:22,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:22,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:22,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:22,260 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:22,261 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-23 19:40:22,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-23 19:40:22,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-23 19:40:22,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 19:40:22,262 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 98 states. [2018-09-23 19:40:22,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:22,595 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-09-23 19:40:22,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-23 19:40:22,596 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-09-23 19:40:22,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:22,597 INFO L225 Difference]: With dead ends: 199 [2018-09-23 19:40:22,597 INFO L226 Difference]: Without dead ends: 197 [2018-09-23 19:40:22,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 19:40:22,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-23 19:40:22,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-23 19:40:22,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-23 19:40:22,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-09-23 19:40:22,601 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2018-09-23 19:40:22,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:22,601 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-09-23 19:40:22,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-23 19:40:22,601 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-09-23 19:40:22,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-23 19:40:22,602 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:22,602 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1] [2018-09-23 19:40:22,602 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:22,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:22,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1010990471, now seen corresponding path program 96 times [2018-09-23 19:40:22,603 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:22,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:22,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:22,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:22,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-23 19:40:26,036 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 19:40:26,039 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 19:40:26,040 INFO L202 PluginConnector]: Adding new model array2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 07:40:26 BoogieIcfgContainer [2018-09-23 19:40:26,040 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 19:40:26,040 INFO L168 Benchmark]: Toolchain (without parser) took 242555.45 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 3.1 MB). Free memory was 1.4 GB in the beginning and 860.3 MB in the end (delta: 572.4 MB). Peak memory consumption was 575.5 MB. Max. memory is 7.1 GB. [2018-09-23 19:40:26,042 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 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. [2018-09-23 19:40:26,042 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.98 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. [2018-09-23 19:40:26,042 INFO L168 Benchmark]: Boogie Preprocessor took 24.55 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. [2018-09-23 19:40:26,042 INFO L168 Benchmark]: RCFGBuilder took 279.63 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. [2018-09-23 19:40:26,043 INFO L168 Benchmark]: TraceAbstraction took 242196.91 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 3.1 MB). Free memory was 1.4 GB in the beginning and 860.3 MB in the end (delta: 551.2 MB). Peak memory consumption was 554.4 MB. Max. memory is 7.1 GB. [2018-09-23 19:40:26,044 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 0.18 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 47.98 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.55 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 279.63 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 242196.91 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 3.1 MB). Free memory was 1.4 GB in the beginning and 860.3 MB in the end (delta: 551.2 MB). Peak memory consumption was 554.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 42]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 42). Cancelled while BasicCegarLoop was analyzing trace of length 197 with TraceHistMax 97, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 95 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 242.1s OverallTime, 97 OverallIterations, 97 TraceHistogramMax, 18.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 384 SDtfs, 0 SDslu, 7763 SDs, 0 SdLazy, 7859 SolverSat, 155 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14157 GetRequests, 9501 SyntacticMatches, 0 SemanticMatches, 4656 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 133.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=197occurred in iteration=96, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 96 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 75.1s SatisfiabilityAnalysisTime, 138.7s InterpolantComputationTime, 19004 NumberOfCodeBlocks, 19004 NumberOfCodeBlocksAsserted, 2511 NumberOfCheckSat, 18813 ConstructedInterpolants, 0 QuantifiedInterpolants, 7263531 SizeOfPredicates, 95 NumberOfNonLiveVariables, 33155 ConjunctsInSsa, 4750 ConjunctsInUnsatCore, 191 InterpolantComputations, 1 PerfectInterpolantSequences, 0/589760 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/array2.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_19-40-26-053.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/array2.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_19-40-26-053.csv Completed graceful shutdown