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/const1.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 20:13:12,457 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:13:12,459 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:13:12,478 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 20:13:12,478 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 20:13:12,480 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 20:13:12,482 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 20:13:12,484 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 20:13:12,486 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 20:13:12,487 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 20:13:12,488 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 20:13:12,488 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 20:13:12,489 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 20:13:12,490 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 20:13:12,491 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 20:13:12,492 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 20:13:12,493 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 20:13:12,495 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 20:13:12,497 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 20:13:12,499 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 20:13:12,500 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 20:13:12,501 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 20:13:12,504 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-30 20:13:12,513 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 20:13:12,541 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:13:12,541 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:13:12,542 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:13:12,542 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:13:12,543 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:13:12,543 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:13:12,544 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:13:12,544 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:13:12,544 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:13:12,544 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:13:12,547 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:13:12,547 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:13:12,547 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:13:12,548 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:13:12,548 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:13:12,548 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:13:12,548 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:13:12,548 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:13:12,549 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:13:12,549 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:13:12,549 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:13:12,549 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:13:12,549 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:13:12,550 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:13:12,550 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:13:12,550 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:13:12,550 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:13:12,550 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:13:12,551 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:13:12,551 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:13:12,596 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:13:12,612 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:13:12,621 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:13:12,622 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:13:12,623 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:13:12,624 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/const1.i_3.bpl [2018-09-30 20:13:12,624 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/const1.i_3.bpl' [2018-09-30 20:13:12,686 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:13:12,689 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:13:12,690 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:13:12,691 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:13:12,692 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:13:12,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:13:12" (1/1) ... [2018-09-30 20:13:12,726 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:13:12" (1/1) ... [2018-09-30 20:13:12,733 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:13:12,734 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:13:12,734 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:13:12,734 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:13:12,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:13:12" (1/1) ... [2018-09-30 20:13:12,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:13:12" (1/1) ... [2018-09-30 20:13:12,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:13:12" (1/1) ... [2018-09-30 20:13:12,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:13:12" (1/1) ... [2018-09-30 20:13:12,752 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:13:12" (1/1) ... [2018-09-30 20:13:12,754 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:13:12" (1/1) ... [2018-09-30 20:13:12,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:13:12" (1/1) ... [2018-09-30 20:13:12,757 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:13:12,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:13:12,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:13:12,758 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:13:12,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:13:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:13:12,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 20:13:12,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 20:13:13,005 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 20:13:13,006 INFO L202 PluginConnector]: Adding new model const1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:13:13 BoogieIcfgContainer [2018-09-30 20:13:13,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:13:13,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:13:13,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:13:13,011 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:13:13,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:13:12" (1/2) ... [2018-09-30 20:13:13,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ada69b4 and model type const1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:13:13, skipping insertion in model container [2018-09-30 20:13:13,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:13:13" (2/2) ... [2018-09-30 20:13:13,015 INFO L112 eAbstractionObserver]: Analyzing ICFG const1.i_3.bpl [2018-09-30 20:13:13,024 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:13:13,032 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:13:13,083 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:13:13,084 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:13:13,084 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:13:13,085 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:13:13,085 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:13:13,085 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:13:13,085 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:13:13,085 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:13:13,086 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:13:13,101 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-30 20:13:13,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 20:13:13,107 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:13,108 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 20:13:13,110 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:13,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:13,116 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-30 20:13:13,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:13,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:13,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:13,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:13:13,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:13,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:13,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:13,307 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:13:13,307 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 20:13:13,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:13:13,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:13:13,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:13:13,327 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-30 20:13:13,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:13,367 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-30 20:13:13,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:13:13,369 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-30 20:13:13,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:13,381 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:13:13,381 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 20:13:13,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:13:13,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 20:13:13,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 20:13:13,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 20:13:13,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 20:13:13,425 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-30 20:13:13,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:13,426 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 20:13:13,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:13:13,426 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 20:13:13,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 20:13:13,427 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:13,427 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-30 20:13:13,427 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:13,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:13,428 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-30 20:13:13,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:13,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:13,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:13,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:13:13,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:13,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:13,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:13,624 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:13,624 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:13,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:13:13,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:13,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:13,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:13,724 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:13,725 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 20:13:13,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 20:13:13,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 20:13:13,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 20:13:13,726 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-09-30 20:13:13,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:13,760 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 20:13:13,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 20:13:13,763 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-30 20:13:13,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:13,764 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:13:13,764 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 20:13:13,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 20:13:13,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 20:13:13,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 20:13:13,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 20:13:13,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 20:13:13,772 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-30 20:13:13,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:13,773 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 20:13:13,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 20:13:13,773 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 20:13:13,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 20:13:13,776 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:13,776 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-30 20:13:13,776 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:13,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:13,777 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-09-30 20:13:13,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:13,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:13,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:13,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:13:13,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:13,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:13,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:13,957 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:13,957 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:13,967 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:13:13,981 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:13:13,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:13,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:14,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:14,024 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:14,024 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 20:13:14,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 20:13:14,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 20:13:14,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:13:14,026 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-09-30 20:13:14,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:14,075 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 20:13:14,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:13:14,076 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-30 20:13:14,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:14,076 INFO L225 Difference]: With dead ends: 13 [2018-09-30 20:13:14,076 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 20:13:14,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:13:14,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 20:13:14,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 20:13:14,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 20:13:14,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 20:13:14,082 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-30 20:13:14,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:14,082 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 20:13:14,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 20:13:14,082 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 20:13:14,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:13:14,083 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:14,083 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-30 20:13:14,083 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:14,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:14,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-09-30 20:13:14,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:14,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:14,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:14,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:14,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:14,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:14,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:14,484 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:14,484 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:14,503 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:13:14,537 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 20:13:14,538 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:14,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:14,558 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:14,580 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:14,580 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 20:13:14,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:13:14,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:13:14,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:13:14,583 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-09-30 20:13:14,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:14,660 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 20:13:14,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:13:14,661 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-30 20:13:14,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:14,662 INFO L225 Difference]: With dead ends: 15 [2018-09-30 20:13:14,663 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 20:13:14,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:13:14,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 20:13:14,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 20:13:14,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 20:13:14,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 20:13:14,668 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-30 20:13:14,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:14,668 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 20:13:14,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:13:14,669 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 20:13:14,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 20:13:14,669 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:14,670 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-30 20:13:14,670 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:14,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:14,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-09-30 20:13:14,671 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:14,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:14,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:14,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:14,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:14,808 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:14,809 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:14,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:14,817 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:13:14,846 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:13:14,846 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:14,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:14,865 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:14,895 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:14,895 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:13:14,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:13:14,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:13:14,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:13:14,896 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-09-30 20:13:15,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:15,053 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 20:13:15,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:13:15,054 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-30 20:13:15,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:15,055 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:13:15,056 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 20:13:15,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:13:15,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 20:13:15,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 20:13:15,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 20:13:15,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 20:13:15,062 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-30 20:13:15,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:15,062 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 20:13:15,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:13:15,062 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 20:13:15,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 20:13:15,063 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:15,063 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-30 20:13:15,063 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:15,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:15,064 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-09-30 20:13:15,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:15,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:15,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:15,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:15,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:15,225 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:15,225 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:15,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:15,235 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:13:15,312 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 20:13:15,313 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:15,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:15,376 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:15,405 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:15,405 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:13:15,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:13:15,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:13:15,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:13:15,406 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-09-30 20:13:15,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:15,533 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 20:13:15,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:13:15,534 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-30 20:13:15,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:15,535 INFO L225 Difference]: With dead ends: 19 [2018-09-30 20:13:15,535 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 20:13:15,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:13:15,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 20:13:15,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 20:13:15,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 20:13:15,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 20:13:15,540 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-30 20:13:15,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:15,541 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 20:13:15,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:13:15,541 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 20:13:15,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 20:13:15,542 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:15,542 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-09-30 20:13:15,542 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:15,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:15,543 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-09-30 20:13:15,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:15,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:15,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:15,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:15,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:15,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:16,010 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:16,011 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:16,034 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:13:16,079 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:13:16,080 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:16,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:16,114 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:16,135 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:16,136 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:13:16,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:13:16,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:13:16,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:13:16,137 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-09-30 20:13:16,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:16,216 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 20:13:16,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:13:16,220 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-30 20:13:16,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:16,221 INFO L225 Difference]: With dead ends: 21 [2018-09-30 20:13:16,221 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 20:13:16,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:13:16,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 20:13:16,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 20:13:16,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 20:13:16,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 20:13:16,226 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-30 20:13:16,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:16,227 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 20:13:16,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:13:16,227 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 20:13:16,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:13:16,228 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:16,228 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-30 20:13:16,228 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:16,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:16,228 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-09-30 20:13:16,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:16,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:16,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:16,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:16,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:16,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:16,441 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:16,441 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:16,441 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:16,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:13:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:16,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:16,522 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:16,522 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:13:16,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:13:16,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:13:16,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:13:16,523 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-09-30 20:13:16,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:16,623 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 20:13:16,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:13:16,625 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-30 20:13:16,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:16,626 INFO L225 Difference]: With dead ends: 23 [2018-09-30 20:13:16,626 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 20:13:16,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:13:16,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 20:13:16,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 20:13:16,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 20:13:16,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 20:13:16,631 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-30 20:13:16,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:16,631 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 20:13:16,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:13:16,632 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 20:13:16,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 20:13:16,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:16,633 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-09-30 20:13:16,633 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:16,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:16,633 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-09-30 20:13:16,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:16,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:16,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:16,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:13:16,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:16,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:16,945 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:16,946 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:16,946 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:16,954 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:13:16,972 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:13:16,973 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:16,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:17,006 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:17,028 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:17,029 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:13:17,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:13:17,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:13:17,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:13:17,030 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-09-30 20:13:17,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:17,196 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 20:13:17,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:13:17,197 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-30 20:13:17,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:17,198 INFO L225 Difference]: With dead ends: 25 [2018-09-30 20:13:17,198 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 20:13:17,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:13:17,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 20:13:17,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 20:13:17,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 20:13:17,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 20:13:17,204 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-30 20:13:17,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:17,204 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 20:13:17,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:13:17,204 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 20:13:17,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 20:13:17,205 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:17,205 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-30 20:13:17,205 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:17,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:17,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-09-30 20:13:17,206 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:17,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:17,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:17,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:17,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:17,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:17,440 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:17,440 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:17,452 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:13:17,578 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 20:13:17,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:17,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:17,625 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:17,625 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 20:13:17,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:13:17,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:13:17,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:13:17,626 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-09-30 20:13:17,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:17,757 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 20:13:17,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 20:13:17,758 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-30 20:13:17,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:17,759 INFO L225 Difference]: With dead ends: 27 [2018-09-30 20:13:17,759 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 20:13:17,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:13:17,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 20:13:17,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 20:13:17,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 20:13:17,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 20:13:17,765 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-30 20:13:17,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:17,766 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 20:13:17,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:13:17,766 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 20:13:17,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 20:13:17,766 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:17,767 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-09-30 20:13:17,767 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:17,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:17,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-09-30 20:13:17,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:17,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:17,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:17,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:17,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:17,985 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:17,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:17,993 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:13:18,015 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:13:18,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:18,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:18,050 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:18,069 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:18,070 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 20:13:18,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:13:18,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:13:18,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:13:18,071 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-09-30 20:13:18,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:18,372 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 20:13:18,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:13:18,373 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-30 20:13:18,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:18,374 INFO L225 Difference]: With dead ends: 29 [2018-09-30 20:13:18,374 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 20:13:18,375 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:13:18,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 20:13:18,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 20:13:18,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 20:13:18,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 20:13:18,381 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-30 20:13:18,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:18,384 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 20:13:18,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:13:18,384 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 20:13:18,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 20:13:18,385 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:18,385 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-09-30 20:13:18,385 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:18,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:18,386 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-09-30 20:13:18,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:18,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:18,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:18,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:18,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:18,751 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:18,751 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:18,751 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:18,759 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:13:22,390 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 20:13:22,391 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:22,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:22,437 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:22,467 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:22,467 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 20:13:22,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:13:22,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:13:22,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:13:22,468 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-09-30 20:13:22,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:22,608 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 20:13:22,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 20:13:22,611 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-30 20:13:22,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:22,612 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:13:22,612 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 20:13:22,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:13:22,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 20:13:22,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 20:13:22,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 20:13:22,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 20:13:22,618 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-30 20:13:22,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:22,618 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 20:13:22,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:13:22,619 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 20:13:22,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 20:13:22,619 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:22,620 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-09-30 20:13:22,620 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:22,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:22,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-09-30 20:13:22,620 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:22,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:22,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:22,621 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:22,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:23,071 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:23,072 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:23,072 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:23,080 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:13:23,189 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 20:13:23,189 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:23,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:23,231 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:23,231 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 20:13:23,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:13:23,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:13:23,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:13:23,232 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-09-30 20:13:23,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:23,405 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 20:13:23,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:13:23,406 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-30 20:13:23,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:23,408 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:13:23,408 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 20:13:23,409 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:13:23,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 20:13:23,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 20:13:23,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 20:13:23,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 20:13:23,416 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-30 20:13:23,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:23,416 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 20:13:23,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:13:23,417 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 20:13:23,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 20:13:23,417 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:23,418 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-09-30 20:13:23,418 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:23,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:23,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-09-30 20:13:23,418 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:23,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:23,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:23,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:23,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:23,961 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:23,961 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:23,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:13:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:23,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:23,996 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:24,018 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:24,018 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 20:13:24,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:13:24,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:13:24,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:13:24,020 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-09-30 20:13:24,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:24,190 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 20:13:24,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 20:13:24,191 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-30 20:13:24,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:24,192 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:13:24,192 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 20:13:24,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:13:24,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 20:13:24,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 20:13:24,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 20:13:24,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 20:13:24,200 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-30 20:13:24,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:24,200 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 20:13:24,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:13:24,200 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 20:13:24,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 20:13:24,201 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:24,201 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-09-30 20:13:24,202 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:24,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:24,202 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-09-30 20:13:24,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:24,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:24,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:24,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:13:24,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:24,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:24,845 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:24,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:24,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:24,854 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:13:24,873 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:13:24,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:24,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:24,896 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:24,917 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:24,918 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 20:13:24,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:13:24,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:13:24,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:13:24,919 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-09-30 20:13:25,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:25,443 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 20:13:25,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:13:25,444 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-30 20:13:25,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:25,445 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:13:25,446 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:13:25,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:13:25,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:13:25,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 20:13:25,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 20:13:25,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 20:13:25,452 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-30 20:13:25,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:25,452 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 20:13:25,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:13:25,452 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 20:13:25,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 20:13:25,453 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:25,453 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-09-30 20:13:25,454 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:25,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:25,454 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-09-30 20:13:25,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:25,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:25,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:25,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:25,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:25,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:25,728 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:25,728 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:25,736 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:13:26,050 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 20:13:26,050 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:26,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:26,076 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:26,096 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:26,097 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 20:13:26,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:13:26,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:13:26,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:13:26,098 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-09-30 20:13:26,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:26,355 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 20:13:26,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:13:26,356 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-30 20:13:26,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:26,357 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:13:26,357 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:13:26,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:13:26,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:13:26,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 20:13:26,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 20:13:26,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 20:13:26,364 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-09-30 20:13:26,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:26,364 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 20:13:26,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:13:26,364 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 20:13:26,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 20:13:26,365 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:26,365 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-09-30 20:13:26,365 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:26,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:26,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-09-30 20:13:26,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:26,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:26,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:26,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:26,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:26,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:26,715 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:26,715 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:26,716 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:26,723 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:13:26,753 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:13:26,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:26,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:26,815 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:26,845 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:26,845 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 20:13:26,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 20:13:26,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 20:13:26,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:13:26,846 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-09-30 20:13:27,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:27,260 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 20:13:27,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 20:13:27,265 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-30 20:13:27,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:27,265 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:13:27,265 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:13:27,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:13:27,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:13:27,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 20:13:27,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 20:13:27,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 20:13:27,274 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-09-30 20:13:27,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:27,274 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 20:13:27,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 20:13:27,276 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 20:13:27,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 20:13:27,276 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:27,276 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-09-30 20:13:27,277 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:27,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:27,277 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-09-30 20:13:27,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:27,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:27,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:27,280 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:27,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:28,026 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:28,026 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:28,027 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:28,034 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:13:58,389 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 20:13:58,389 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:58,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:58,466 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:58,489 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:58,489 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 20:13:58,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:13:58,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:13:58,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:13:58,490 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-09-30 20:13:58,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:58,785 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 20:13:58,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 20:13:58,785 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-30 20:13:58,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:58,786 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:13:58,786 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:13:58,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:13:58,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:13:58,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 20:13:58,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 20:13:58,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 20:13:58,794 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-09-30 20:13:58,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:58,794 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 20:13:58,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:13:58,795 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 20:13:58,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 20:13:58,795 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:58,796 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-09-30 20:13:58,796 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:58,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:58,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-09-30 20:13:58,796 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:58,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:58,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:58,797 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:58,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:58,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:59,124 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:59,124 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:59,131 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:14:09,110 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 20:14:09,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:09,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:09,152 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:09,172 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:09,173 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 20:14:09,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 20:14:09,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 20:14:09,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-30 20:14:09,174 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-09-30 20:14:09,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:09,936 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 20:14:09,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 20:14:09,937 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-30 20:14:09,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:09,938 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:14:09,938 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:14:09,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-30 20:14:09,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:14:09,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 20:14:09,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 20:14:09,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 20:14:09,946 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-09-30 20:14:09,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:09,946 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 20:14:09,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 20:14:09,946 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 20:14:09,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 20:14:09,947 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:09,947 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-09-30 20:14:09,947 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:09,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:09,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-09-30 20:14:09,948 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:09,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:09,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:09,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:09,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:10,364 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:10,365 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:10,365 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:10,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:14:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:10,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:10,446 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:10,446 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 20:14:10,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:14:10,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:14:10,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:14:10,447 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-09-30 20:14:10,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:10,916 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 20:14:10,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 20:14:10,916 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-30 20:14:10,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:10,917 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:14:10,917 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:14:10,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:14:10,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:14:10,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 20:14:10,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 20:14:10,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 20:14:10,925 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-09-30 20:14:10,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:10,926 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 20:14:10,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:14:10,926 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 20:14:10,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 20:14:10,926 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:10,927 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-09-30 20:14:10,927 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:10,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:10,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-09-30 20:14:10,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:10,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:10,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:10,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:14:10,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:10,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:11,390 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:11,390 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:11,390 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:11,403 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:14:11,423 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:14:11,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:11,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:11,447 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:11,469 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:11,469 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 20:14:11,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 20:14:11,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 20:14:11,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-30 20:14:11,470 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-09-30 20:14:11,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:11,802 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 20:14:11,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:14:11,803 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-30 20:14:11,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:11,804 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:14:11,804 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:14:11,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-30 20:14:11,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:14:11,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 20:14:11,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 20:14:11,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 20:14:11,811 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-09-30 20:14:11,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:11,811 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 20:14:11,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 20:14:11,811 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 20:14:11,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 20:14:11,812 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:11,812 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-09-30 20:14:11,812 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:11,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:11,812 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-09-30 20:14:11,812 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:11,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:11,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:11,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:11,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:11,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:13,025 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:13,025 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:13,032 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:14:21,051 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 20:14:21,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:21,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:21,097 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:21,118 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:21,118 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 20:14:21,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 20:14:21,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 20:14:21,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-30 20:14:21,119 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-09-30 20:14:21,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:21,469 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 20:14:21,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 20:14:21,473 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-30 20:14:21,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:21,474 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:14:21,474 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:14:21,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-30 20:14:21,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:14:21,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 20:14:21,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 20:14:21,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 20:14:21,479 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-09-30 20:14:21,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:21,479 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 20:14:21,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 20:14:21,480 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 20:14:21,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 20:14:21,480 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:21,480 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-09-30 20:14:21,481 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:21,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:21,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-09-30 20:14:21,481 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:21,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:21,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:21,482 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:21,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:21,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:21,976 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:21,976 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:21,976 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:21,986 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:14:22,018 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:14:22,019 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:22,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:22,090 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:22,090 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 20:14:22,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 20:14:22,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 20:14:22,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-30 20:14:22,092 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-09-30 20:14:22,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:22,472 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 20:14:22,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 20:14:22,472 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-30 20:14:22,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:22,473 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:14:22,473 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:14:22,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-30 20:14:22,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:14:22,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 20:14:22,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 20:14:22,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 20:14:22,480 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-09-30 20:14:22,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:22,480 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 20:14:22,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 20:14:22,481 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 20:14:22,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 20:14:22,481 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:22,481 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-09-30 20:14:22,482 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:22,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:22,482 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-09-30 20:14:22,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:22,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:22,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:22,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:22,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:22,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:23,122 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:23,123 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:23,123 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:23,130 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:15:39,351 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-30 20:15:39,352 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:40,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:40,777 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:40,806 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:40,806 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 20:15:40,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 20:15:40,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 20:15:40,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-30 20:15:40,807 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-09-30 20:15:41,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:41,257 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 20:15:41,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 20:15:41,258 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-30 20:15:41,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:41,258 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:15:41,259 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:15:41,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-30 20:15:41,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:15:41,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 20:15:41,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 20:15:41,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 20:15:41,265 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-09-30 20:15:41,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:41,266 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 20:15:41,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 20:15:41,266 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 20:15:41,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 20:15:41,267 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:41,267 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-09-30 20:15:41,267 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:41,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:41,268 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-09-30 20:15:41,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:41,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:41,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:41,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:41,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:41,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:42,086 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:42,086 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:42,087 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:42,095 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:16:05,626 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 20:16:05,626 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:16:05,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:16:05,666 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:05,696 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:16:05,697 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 20:16:05,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 20:16:05,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 20:16:05,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-30 20:16:05,698 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-09-30 20:16:06,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:16:06,359 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 20:16:06,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:16:06,360 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-30 20:16:06,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:16:06,360 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:16:06,360 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:16:06,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-30 20:16:06,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:16:06,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 20:16:06,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 20:16:06,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 20:16:06,367 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-09-30 20:16:06,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:16:06,367 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 20:16:06,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 20:16:06,367 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 20:16:06,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 20:16:06,368 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:16:06,368 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-09-30 20:16:06,368 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:16:06,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:16:06,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-09-30 20:16:06,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:16:06,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:16:06,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:06,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:16:06,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:06,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:16:06,934 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:06,934 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:16:06,935 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:16:06,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:16:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:16:06,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:16:06,992 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:07,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:16:07,012 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 20:16:07,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 20:16:07,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 20:16:07,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-30 20:16:07,013 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-09-30 20:16:07,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:16:07,484 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 20:16:07,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 20:16:07,491 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-30 20:16:07,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:16:07,491 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:16:07,491 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 20:16:07,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-30 20:16:07,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 20:16:07,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 20:16:07,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 20:16:07,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 20:16:07,496 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-09-30 20:16:07,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:16:07,496 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 20:16:07,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 20:16:07,497 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 20:16:07,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 20:16:07,497 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:16:07,497 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-09-30 20:16:07,498 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:16:07,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:16:07,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-09-30 20:16:07,498 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:16:07,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:16:07,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:07,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:16:07,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:07,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:16:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:09,087 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:16:09,087 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:16:09,094 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:16:09,123 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:16:09,123 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:16:09,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:16:09,160 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:09,180 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:16:09,181 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 20:16:09,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 20:16:09,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 20:16:09,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-30 20:16:09,182 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-09-30 20:16:09,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:16:09,693 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 20:16:09,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:16:09,693 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-30 20:16:09,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:16:09,694 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:16:09,694 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:16:09,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-30 20:16:09,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:16:09,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 20:16:09,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 20:16:09,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 20:16:09,699 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-09-30 20:16:09,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:16:09,700 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 20:16:09,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 20:16:09,700 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 20:16:09,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 20:16:09,701 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:16:09,701 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-09-30 20:16:09,701 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:16:09,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:16:09,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-09-30 20:16:09,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:16:09,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:16:09,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:09,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:16:09,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:16:11,023 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:11,024 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:16:11,024 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:16:11,032 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:16:20,414 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-30 20:16:20,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:16:20,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:16:20,679 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:20,701 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:16:20,701 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 20:16:20,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 20:16:20,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 20:16:20,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-30 20:16:20,702 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-09-30 20:16:21,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:16:21,287 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 20:16:21,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 20:16:21,287 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-30 20:16:21,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:16:21,288 INFO L225 Difference]: With dead ends: 63 [2018-09-30 20:16:21,288 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 20:16:21,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-30 20:16:21,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 20:16:21,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 20:16:21,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 20:16:21,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 20:16:21,293 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-09-30 20:16:21,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:16:21,293 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 20:16:21,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 20:16:21,294 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 20:16:21,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 20:16:21,294 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:16:21,294 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-09-30 20:16:21,295 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:16:21,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:16:21,295 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-09-30 20:16:21,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:16:21,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:16:21,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:21,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:16:21,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:16:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:22,026 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:16:22,026 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:16:22,035 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:16:22,062 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:16:22,062 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:16:22,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:16:22,094 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:22,116 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:16:22,116 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 20:16:22,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 20:16:22,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 20:16:22,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-30 20:16:22,117 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-09-30 20:16:22,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:16:22,717 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 20:16:22,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 20:16:22,718 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-30 20:16:22,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:16:22,719 INFO L225 Difference]: With dead ends: 65 [2018-09-30 20:16:22,719 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 20:16:22,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-30 20:16:22,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 20:16:22,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 20:16:22,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 20:16:22,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 20:16:22,725 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-09-30 20:16:22,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:16:22,725 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 20:16:22,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 20:16:22,725 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 20:16:22,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 20:16:22,726 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:16:22,726 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-09-30 20:16:22,726 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:16:22,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:16:22,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-09-30 20:16:22,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:16:22,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:16:22,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:22,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:16:22,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:22,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:16:23,394 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:23,394 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:16:23,395 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:16:23,402 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown