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/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b2fde6a [2018-09-28 10:11:30,329 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-28 10:11:30,332 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-28 10:11:30,345 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-28 10:11:30,345 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-28 10:11:30,346 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-28 10:11:30,348 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-28 10:11:30,349 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-28 10:11:30,351 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-28 10:11:30,352 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-28 10:11:30,353 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-28 10:11:30,379 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 [2018-09-28 10:11:30,400 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-28 10:11:30,400 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-28 10:11:30,401 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-28 10:11:30,401 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-28 10:11:30,402 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-28 10:11:30,402 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-28 10:11:30,402 INFO L133 SettingsManager]: * Use SBE=true [2018-09-28 10:11:30,403 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-28 10:11:30,403 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-28 10:11:30,403 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-28 10:11:30,403 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-28 10:11:30,403 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-28 10:11:30,404 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-28 10:11:30,404 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-28 10:11:30,404 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-28 10:11:30,404 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-28 10:11:30,404 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-28 10:11:30,405 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-28 10:11:30,405 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-28 10:11:30,405 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-28 10:11:30,405 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-28 10:11:30,406 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-28 10:11:30,406 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:11:30,406 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-28 10:11:30,406 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-28 10:11:30,406 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-28 10:11:30,407 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-28 10:11:30,407 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-28 10:11:30,407 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-28 10:11:30,407 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-28 10:11:30,454 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-28 10:11:30,473 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-28 10:11:30,477 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-28 10:11:30,478 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-28 10:11:30,479 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-28 10:11:30,479 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl [2018-09-28 10:11:30,480 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl' [2018-09-28 10:11:30,530 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-28 10:11:30,535 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-28 10:11:30,536 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-28 10:11:30,536 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-28 10:11:30,536 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-28 10:11:30,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:11:30" (1/1) ... [2018-09-28 10:11:30,570 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:11:30" (1/1) ... [2018-09-28 10:11:30,575 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-28 10:11:30,576 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-28 10:11:30,576 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-28 10:11:30,578 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-28 10:11:30,579 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-28 10:11:30,579 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-28 10:11:30,579 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-28 10:11:30,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:11:30" (1/1) ... [2018-09-28 10:11:30,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:11:30" (1/1) ... [2018-09-28 10:11:30,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:11:30" (1/1) ... [2018-09-28 10:11:30,592 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:11:30" (1/1) ... [2018-09-28 10:11:30,597 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:11:30" (1/1) ... [2018-09-28 10:11:30,601 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:11:30" (1/1) ... [2018-09-28 10:11:30,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:11:30" (1/1) ... [2018-09-28 10:11:30,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-28 10:11:30,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-28 10:11:30,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-28 10:11:30,604 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-28 10:11:30,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:11:30" (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 [2018-09-28 10:11:30,684 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-28 10:11:30,684 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-28 10:11:30,684 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-28 10:11:30,893 INFO L350 CfgBuilder]: Using library mode [2018-09-28 10:11:30,894 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:11:30 BoogieIcfgContainer [2018-09-28 10:11:30,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-28 10:11:30,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-28 10:11:30,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-28 10:11:30,904 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-28 10:11:30,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:11:30" (1/2) ... [2018-09-28 10:11:30,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17b8c782 and model type DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.09 10:11:30, skipping insertion in model container [2018-09-28 10:11:30,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:11:30" (2/2) ... [2018-09-28 10:11:30,908 INFO L112 eAbstractionObserver]: Analyzing ICFG DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl [2018-09-28 10:11:30,917 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-28 10:11:30,929 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-28 10:11:30,976 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-28 10:11:30,977 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-28 10:11:30,977 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-28 10:11:30,977 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-28 10:11:30,977 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-28 10:11:30,977 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-28 10:11:30,978 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-28 10:11:30,978 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-28 10:11:30,978 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-28 10:11:30,991 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-09-28 10:11:30,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-09-28 10:11:30,997 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:30,998 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-09-28 10:11:30,999 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:31,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:31,005 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-09-28 10:11:31,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:31,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:31,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:31,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:11:31,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:31,361 WARN L178 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-09-28 10:11:31,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:31,365 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 10:11:31,365 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-28 10:11:31,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-28 10:11:31,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-28 10:11:31,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-28 10:11:31,386 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-09-28 10:11:31,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:31,443 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-28 10:11:31,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-28 10:11:31,445 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-09-28 10:11:31,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:31,460 INFO L225 Difference]: With dead ends: 9 [2018-09-28 10:11:31,460 INFO L226 Difference]: Without dead ends: 4 [2018-09-28 10:11:31,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-28 10:11:31,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-09-28 10:11:31,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-09-28 10:11:31,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-09-28 10:11:31,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-09-28 10:11:31,500 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-09-28 10:11:31,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:31,501 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-09-28 10:11:31,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-28 10:11:31,501 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-09-28 10:11:31,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-28 10:11:31,501 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:31,502 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-28 10:11:31,502 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:31,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:31,502 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-09-28 10:11:31,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:31,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:31,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:31,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:11:31,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:31,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:31,681 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:31,681 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 [2018-09-28 10:11:31,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:11:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:31,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:31,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:31,810 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:31,811 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-09-28 10:11:31,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:11:31,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:11:31,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:11:31,812 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 6 states. [2018-09-28 10:11:31,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:31,926 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-09-28 10:11:31,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-28 10:11:31,926 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-09-28 10:11:31,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:31,927 INFO L225 Difference]: With dead ends: 6 [2018-09-28 10:11:31,927 INFO L226 Difference]: Without dead ends: 5 [2018-09-28 10:11:31,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:11:31,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-28 10:11:31,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-28 10:11:31,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-28 10:11:31,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-28 10:11:31,931 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-28 10:11:31,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:31,931 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-28 10:11:31,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:11:31,931 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-28 10:11:31,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-28 10:11:31,932 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:31,932 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-09-28 10:11:31,932 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:31,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:31,933 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-09-28 10:11:31,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:31,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:31,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:31,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:11:31,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:31,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:32,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:32,131 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:32,131 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 [2018-09-28 10:11:32,140 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:11:32,148 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:11:32,149 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:32,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:32,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:32,392 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:32,392 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-09-28 10:11:32,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:11:32,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:11:32,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:11:32,394 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 8 states. [2018-09-28 10:11:32,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:32,481 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-09-28 10:11:32,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:11:32,482 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-09-28 10:11:32,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:32,482 INFO L225 Difference]: With dead ends: 7 [2018-09-28 10:11:32,482 INFO L226 Difference]: Without dead ends: 6 [2018-09-28 10:11:32,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:11:32,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-28 10:11:32,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-28 10:11:32,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-28 10:11:32,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-28 10:11:32,486 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-28 10:11:32,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:32,487 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-28 10:11:32,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:11:32,487 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-28 10:11:32,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-28 10:11:32,487 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:32,488 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-09-28 10:11:32,488 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:32,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:32,488 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-09-28 10:11:32,489 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:32,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:32,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:32,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:32,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:32,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:32,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:32,688 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:32,688 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 [2018-09-28 10:11:32,699 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:11:32,707 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-28 10:11:32,708 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:32,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:32,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:33,009 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:33,009 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-28 10:11:33,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:11:33,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:11:33,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:11:33,010 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 10 states. [2018-09-28 10:11:33,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:33,170 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-28 10:11:33,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:11:33,170 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-09-28 10:11:33,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:33,171 INFO L225 Difference]: With dead ends: 8 [2018-09-28 10:11:33,171 INFO L226 Difference]: Without dead ends: 7 [2018-09-28 10:11:33,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:11:33,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-28 10:11:33,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-28 10:11:33,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-28 10:11:33,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-28 10:11:33,176 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-28 10:11:33,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:33,176 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-28 10:11:33,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:11:33,176 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-28 10:11:33,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-28 10:11:33,177 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:33,177 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-09-28 10:11:33,178 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:33,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:33,178 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-09-28 10:11:33,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:33,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:33,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:33,180 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:33,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:33,410 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-09-28 10:11:33,523 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:33,523 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:33,524 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 [2018-09-28 10:11:33,532 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:11:33,538 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:11:33,538 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:33,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:33,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:33,688 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:33,688 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-09-28 10:11:33,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-28 10:11:33,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-28 10:11:33,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2018-09-28 10:11:33,690 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 12 states. [2018-09-28 10:11:33,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:33,757 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-28 10:11:33,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:11:33,757 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-09-28 10:11:33,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:33,759 INFO L225 Difference]: With dead ends: 9 [2018-09-28 10:11:33,759 INFO L226 Difference]: Without dead ends: 8 [2018-09-28 10:11:33,760 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2018-09-28 10:11:33,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-28 10:11:33,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-28 10:11:33,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-28 10:11:33,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-28 10:11:33,764 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-28 10:11:33,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:33,764 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-28 10:11:33,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-28 10:11:33,764 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-28 10:11:33,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-28 10:11:33,765 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:33,765 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-09-28 10:11:33,765 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:33,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:33,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-09-28 10:11:33,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:33,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:33,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:33,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:33,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:33,938 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:33,938 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 [2018-09-28 10:11:33,947 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:11:33,960 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-28 10:11:33,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:33,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:34,241 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:34,262 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:34,262 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-28 10:11:34,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 10:11:34,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 10:11:34,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-28 10:11:34,264 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 14 states. [2018-09-28 10:11:34,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:34,406 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-28 10:11:34,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:11:34,407 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 7 [2018-09-28 10:11:34,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:34,408 INFO L225 Difference]: With dead ends: 10 [2018-09-28 10:11:34,408 INFO L226 Difference]: Without dead ends: 9 [2018-09-28 10:11:34,409 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-28 10:11:34,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-28 10:11:34,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-28 10:11:34,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-28 10:11:34,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-28 10:11:34,412 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-28 10:11:34,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:34,413 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-28 10:11:34,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 10:11:34,413 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-28 10:11:34,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-28 10:11:34,414 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:34,415 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-09-28 10:11:34,415 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:34,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:34,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-09-28 10:11:34,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:34,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:34,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:34,417 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:34,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:34,634 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:34,635 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:34,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:11:34,644 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:11:34,654 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-28 10:11:34,655 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:34,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:34,953 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:34,975 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:34,975 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-09-28 10:11:34,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-28 10:11:34,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-28 10:11:34,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2018-09-28 10:11:34,976 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 16 states. [2018-09-28 10:11:35,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:35,084 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-28 10:11:35,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:11:35,085 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 8 [2018-09-28 10:11:35,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:35,085 INFO L225 Difference]: With dead ends: 11 [2018-09-28 10:11:35,085 INFO L226 Difference]: Without dead ends: 10 [2018-09-28 10:11:35,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2018-09-28 10:11:35,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-28 10:11:35,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-28 10:11:35,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-28 10:11:35,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-28 10:11:35,089 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-28 10:11:35,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:35,090 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-28 10:11:35,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-28 10:11:35,090 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-28 10:11:35,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 10:11:35,090 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:35,090 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-09-28 10:11:35,091 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:35,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:35,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-09-28 10:11:35,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:35,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:35,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:35,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:35,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:35,323 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:35,324 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:35,324 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 [2018-09-28 10:11:35,337 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:11:35,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:35,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:35,496 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:35,518 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:35,519 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-28 10:11:35,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-28 10:11:35,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-28 10:11:35,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2018-09-28 10:11:35,520 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 18 states. [2018-09-28 10:11:35,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:35,648 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-28 10:11:35,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:11:35,648 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 9 [2018-09-28 10:11:35,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:35,649 INFO L225 Difference]: With dead ends: 12 [2018-09-28 10:11:35,649 INFO L226 Difference]: Without dead ends: 11 [2018-09-28 10:11:35,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2018-09-28 10:11:35,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-28 10:11:35,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-28 10:11:35,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-28 10:11:35,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-28 10:11:35,653 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-28 10:11:35,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:35,654 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-28 10:11:35,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-28 10:11:35,654 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-28 10:11:35,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-28 10:11:35,655 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:35,655 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-09-28 10:11:35,655 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:35,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:35,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-09-28 10:11:35,656 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:35,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:35,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:35,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:11:35,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:35,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:35,865 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:35,866 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:35,866 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 [2018-09-28 10:11:35,879 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:11:35,905 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:11:35,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:35,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:36,102 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:36,126 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:36,126 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-09-28 10:11:36,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-28 10:11:36,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-28 10:11:36,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2018-09-28 10:11:36,128 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 20 states. [2018-09-28 10:11:36,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:36,258 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-28 10:11:36,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:11:36,261 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 10 [2018-09-28 10:11:36,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:36,261 INFO L225 Difference]: With dead ends: 13 [2018-09-28 10:11:36,261 INFO L226 Difference]: Without dead ends: 12 [2018-09-28 10:11:36,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2018-09-28 10:11:36,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-28 10:11:36,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-28 10:11:36,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-28 10:11:36,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-28 10:11:36,266 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-28 10:11:36,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:36,266 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-28 10:11:36,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-28 10:11:36,266 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-28 10:11:36,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:11:36,266 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:36,267 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-09-28 10:11:36,267 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:36,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:36,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-09-28 10:11:36,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:36,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:36,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:36,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:36,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:36,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:36,516 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:36,517 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:36,517 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 [2018-09-28 10:11:36,526 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:11:36,545 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-28 10:11:36,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:36,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:37,169 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:37,191 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:37,191 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-09-28 10:11:37,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-28 10:11:37,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-28 10:11:37,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2018-09-28 10:11:37,192 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 22 states. [2018-09-28 10:11:37,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:37,358 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-28 10:11:37,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-28 10:11:37,358 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 11 [2018-09-28 10:11:37,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:37,359 INFO L225 Difference]: With dead ends: 14 [2018-09-28 10:11:37,359 INFO L226 Difference]: Without dead ends: 13 [2018-09-28 10:11:37,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2018-09-28 10:11:37,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-28 10:11:37,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-28 10:11:37,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-28 10:11:37,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-28 10:11:37,364 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-28 10:11:37,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:37,364 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-28 10:11:37,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-28 10:11:37,364 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-28 10:11:37,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-28 10:11:37,365 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:37,365 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-09-28 10:11:37,365 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:37,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:37,365 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-09-28 10:11:37,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:37,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:37,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:37,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:37,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:37,579 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-09-28 10:11:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:37,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:37,874 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 [2018-09-28 10:11:37,882 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:11:37,892 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:11:37,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:37,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:38,170 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:38,192 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:38,192 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-09-28 10:11:38,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-28 10:11:38,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-28 10:11:38,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2018-09-28 10:11:38,194 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 24 states. [2018-09-28 10:11:38,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:38,599 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-28 10:11:38,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-28 10:11:38,600 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 12 [2018-09-28 10:11:38,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:38,601 INFO L225 Difference]: With dead ends: 15 [2018-09-28 10:11:38,601 INFO L226 Difference]: Without dead ends: 14 [2018-09-28 10:11:38,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2018-09-28 10:11:38,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-28 10:11:38,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-28 10:11:38,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-28 10:11:38,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-28 10:11:38,606 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-28 10:11:38,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:38,607 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-28 10:11:38,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-28 10:11:38,607 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-28 10:11:38,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:11:38,607 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:38,607 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-09-28 10:11:38,608 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:38,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:38,608 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-09-28 10:11:38,608 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:38,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:38,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:38,609 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:38,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:38,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:38,938 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:38,938 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:38,939 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:11:38,949 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:11:38,959 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:11:38,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:38,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:39,299 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:39,319 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:39,320 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-09-28 10:11:39,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-28 10:11:39,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-28 10:11:39,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2018-09-28 10:11:39,321 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 26 states. [2018-09-28 10:11:40,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:40,162 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-28 10:11:40,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-28 10:11:40,162 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 13 [2018-09-28 10:11:40,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:40,163 INFO L225 Difference]: With dead ends: 16 [2018-09-28 10:11:40,164 INFO L226 Difference]: Without dead ends: 15 [2018-09-28 10:11:40,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2018-09-28 10:11:40,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-28 10:11:40,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-28 10:11:40,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-28 10:11:40,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-28 10:11:40,168 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-28 10:11:40,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:40,169 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-28 10:11:40,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-28 10:11:40,169 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-28 10:11:40,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 10:11:40,169 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:40,169 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-09-28 10:11:40,170 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:40,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:40,170 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-09-28 10:11:40,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:40,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:40,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:40,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:40,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:40,558 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:40,558 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 [2018-09-28 10:11:40,567 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:11:40,581 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:11:40,581 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:40,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:40,978 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:40,999 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:40,999 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-09-28 10:11:41,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-28 10:11:41,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-28 10:11:41,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2018-09-28 10:11:41,001 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 28 states. [2018-09-28 10:11:41,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:41,207 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-28 10:11:41,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-28 10:11:41,208 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 14 [2018-09-28 10:11:41,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:41,209 INFO L225 Difference]: With dead ends: 17 [2018-09-28 10:11:41,209 INFO L226 Difference]: Without dead ends: 16 [2018-09-28 10:11:41,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2018-09-28 10:11:41,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-28 10:11:41,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-28 10:11:41,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:11:41,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-28 10:11:41,214 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-28 10:11:41,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:41,214 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-28 10:11:41,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-28 10:11:41,215 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-28 10:11:41,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:11:41,215 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:41,215 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-09-28 10:11:41,215 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:41,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:41,216 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-09-28 10:11:41,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:41,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:41,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:41,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:41,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:41,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:41,774 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:41,774 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:11:41,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:11:41,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:41,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:42,129 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:42,149 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:42,150 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-09-28 10:11:42,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-28 10:11:42,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-28 10:11:42,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=799, Unknown=0, NotChecked=0, Total=870 [2018-09-28 10:11:42,151 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 30 states. [2018-09-28 10:11:42,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:42,410 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-28 10:11:42,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-28 10:11:42,411 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 15 [2018-09-28 10:11:42,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:42,412 INFO L225 Difference]: With dead ends: 18 [2018-09-28 10:11:42,412 INFO L226 Difference]: Without dead ends: 17 [2018-09-28 10:11:42,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=799, Unknown=0, NotChecked=0, Total=870 [2018-09-28 10:11:42,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-28 10:11:42,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-28 10:11:42,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-28 10:11:42,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-28 10:11:42,416 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-28 10:11:42,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:42,416 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-28 10:11:42,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-28 10:11:42,417 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-28 10:11:42,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-28 10:11:42,417 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:42,417 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-09-28 10:11:42,417 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:42,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:42,418 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-09-28 10:11:42,418 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:42,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:42,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:42,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:11:42,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:42,746 WARN L178 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-28 10:11:43,076 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:43,077 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:43,077 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) [2018-09-28 10:11:43,093 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:11:43,106 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:11:43,107 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:43,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:43,569 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:43,589 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:43,590 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-09-28 10:11:43,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-28 10:11:43,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-28 10:11:43,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2018-09-28 10:11:43,591 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 32 states. [2018-09-28 10:11:43,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:43,885 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-28 10:11:43,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-28 10:11:43,885 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 16 [2018-09-28 10:11:43,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:43,886 INFO L225 Difference]: With dead ends: 19 [2018-09-28 10:11:43,886 INFO L226 Difference]: Without dead ends: 18 [2018-09-28 10:11:43,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2018-09-28 10:11:43,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-28 10:11:43,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-28 10:11:43,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:11:43,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-28 10:11:43,892 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-28 10:11:43,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:43,892 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-28 10:11:43,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-28 10:11:43,892 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-28 10:11:43,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:11:43,893 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:43,893 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-09-28 10:11:43,893 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:43,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:43,894 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-09-28 10:11:43,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:43,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:43,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:43,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:43,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:43,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:44,244 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:44,244 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 [2018-09-28 10:11:44,254 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:11:44,269 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:11:44,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:44,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:44,708 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:44,730 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:44,730 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-09-28 10:11:44,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-28 10:11:44,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-28 10:11:44,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1041, Unknown=0, NotChecked=0, Total=1122 [2018-09-28 10:11:44,732 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 34 states. [2018-09-28 10:11:45,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:45,214 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-28 10:11:45,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-28 10:11:45,214 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 17 [2018-09-28 10:11:45,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:45,215 INFO L225 Difference]: With dead ends: 20 [2018-09-28 10:11:45,215 INFO L226 Difference]: Without dead ends: 19 [2018-09-28 10:11:45,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=1041, Unknown=0, NotChecked=0, Total=1122 [2018-09-28 10:11:45,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-28 10:11:45,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-28 10:11:45,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-28 10:11:45,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-28 10:11:45,220 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-28 10:11:45,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:45,220 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-28 10:11:45,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-28 10:11:45,221 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-28 10:11:45,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 10:11:45,221 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:45,221 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-09-28 10:11:45,222 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:45,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:45,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-09-28 10:11:45,222 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:45,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:45,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:45,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:45,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:45,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:45,445 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-28 10:11:45,712 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:45,712 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:45,712 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 [2018-09-28 10:11:45,720 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:11:45,750 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:11:45,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:45,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:46,225 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:46,247 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:46,247 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-09-28 10:11:46,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-28 10:11:46,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-28 10:11:46,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1174, Unknown=0, NotChecked=0, Total=1260 [2018-09-28 10:11:46,248 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 36 states. [2018-09-28 10:11:46,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:46,574 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-28 10:11:46,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-28 10:11:46,575 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 18 [2018-09-28 10:11:46,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:46,576 INFO L225 Difference]: With dead ends: 21 [2018-09-28 10:11:46,576 INFO L226 Difference]: Without dead ends: 20 [2018-09-28 10:11:46,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=86, Invalid=1174, Unknown=0, NotChecked=0, Total=1260 [2018-09-28 10:11:46,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-28 10:11:46,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-28 10:11:46,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:11:46,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-28 10:11:46,581 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-28 10:11:46,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:46,581 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-28 10:11:46,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-28 10:11:46,581 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-28 10:11:46,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:11:46,582 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:46,582 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-09-28 10:11:46,582 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:46,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:46,582 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-09-28 10:11:46,582 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:46,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:46,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:46,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:46,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:46,922 WARN L178 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-28 10:11:47,082 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-28 10:11:47,283 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-28 10:11:47,506 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-28 10:11:48,108 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:48,108 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:48,109 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 [2018-09-28 10:11:48,117 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:11:48,132 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-28 10:11:48,133 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:48,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:48,623 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:48,643 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:48,644 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-09-28 10:11:48,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-28 10:11:48,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-28 10:11:48,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1315, Unknown=0, NotChecked=0, Total=1406 [2018-09-28 10:11:48,645 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 38 states. [2018-09-28 10:11:49,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:49,132 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-28 10:11:49,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-28 10:11:49,133 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 19 [2018-09-28 10:11:49,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:49,134 INFO L225 Difference]: With dead ends: 22 [2018-09-28 10:11:49,134 INFO L226 Difference]: Without dead ends: 21 [2018-09-28 10:11:49,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=91, Invalid=1315, Unknown=0, NotChecked=0, Total=1406 [2018-09-28 10:11:49,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-28 10:11:49,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-28 10:11:49,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-28 10:11:49,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-28 10:11:49,140 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-28 10:11:49,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:49,140 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-28 10:11:49,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-28 10:11:49,140 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-28 10:11:49,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-28 10:11:49,141 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:49,141 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-09-28 10:11:49,141 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:49,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:49,142 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-09-28 10:11:49,142 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:49,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:49,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:49,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:49,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:49,648 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:49,649 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:49,649 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 [2018-09-28 10:11:49,670 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:11:49,690 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-28 10:11:49,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:49,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:50,303 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:50,325 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:50,326 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-09-28 10:11:50,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-28 10:11:50,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-28 10:11:50,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1464, Unknown=0, NotChecked=0, Total=1560 [2018-09-28 10:11:50,329 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 40 states. [2018-09-28 10:11:51,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:51,133 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-28 10:11:51,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-28 10:11:51,134 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 20 [2018-09-28 10:11:51,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:51,135 INFO L225 Difference]: With dead ends: 23 [2018-09-28 10:11:51,135 INFO L226 Difference]: Without dead ends: 22 [2018-09-28 10:11:51,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=96, Invalid=1464, Unknown=0, NotChecked=0, Total=1560 [2018-09-28 10:11:51,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-28 10:11:51,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-28 10:11:51,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:11:51,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-28 10:11:51,139 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-28 10:11:51,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:51,140 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-28 10:11:51,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-28 10:11:51,140 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-28 10:11:51,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-28 10:11:51,140 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:51,140 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-09-28 10:11:51,141 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:51,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:51,141 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-09-28 10:11:51,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:51,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:51,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:51,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:51,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:51,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:51,610 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 [2018-09-28 10:11:51,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:11:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:51,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:52,465 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:52,492 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:52,492 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-09-28 10:11:52,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-28 10:11:52,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-28 10:11:52,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1621, Unknown=0, NotChecked=0, Total=1722 [2018-09-28 10:11:52,493 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 42 states. [2018-09-28 10:11:53,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:53,005 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-28 10:11:53,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-28 10:11:53,005 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 21 [2018-09-28 10:11:53,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:53,006 INFO L225 Difference]: With dead ends: 24 [2018-09-28 10:11:53,006 INFO L226 Difference]: Without dead ends: 23 [2018-09-28 10:11:53,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=1621, Unknown=0, NotChecked=0, Total=1722 [2018-09-28 10:11:53,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-28 10:11:53,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-28 10:11:53,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-28 10:11:53,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-28 10:11:53,011 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-28 10:11:53,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:53,012 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-28 10:11:53,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-28 10:11:53,012 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-28 10:11:53,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-28 10:11:53,012 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:53,013 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-09-28 10:11:53,013 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:53,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:53,013 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-09-28 10:11:53,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:53,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:53,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:53,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:11:53,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:53,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:53,353 WARN L178 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-28 10:11:53,520 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-28 10:11:54,049 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:54,049 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:54,049 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 [2018-09-28 10:11:54,057 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:11:54,085 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:11:54,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:54,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:54,833 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:54,833 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-09-28 10:11:54,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-28 10:11:54,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-28 10:11:54,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1786, Unknown=0, NotChecked=0, Total=1892 [2018-09-28 10:11:54,834 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 44 states. [2018-09-28 10:11:55,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:55,334 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-28 10:11:55,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 10:11:55,334 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 22 [2018-09-28 10:11:55,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:55,335 INFO L225 Difference]: With dead ends: 25 [2018-09-28 10:11:55,335 INFO L226 Difference]: Without dead ends: 24 [2018-09-28 10:11:55,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=106, Invalid=1786, Unknown=0, NotChecked=0, Total=1892 [2018-09-28 10:11:55,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-28 10:11:55,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-28 10:11:55,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:11:55,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-28 10:11:55,341 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-28 10:11:55,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:55,341 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-28 10:11:55,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-28 10:11:55,341 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-28 10:11:55,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-28 10:11:55,342 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:55,342 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-09-28 10:11:55,342 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:55,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:55,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-09-28 10:11:55,343 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:55,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:55,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:55,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:55,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:55,917 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:55,917 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:55,917 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 [2018-09-28 10:11:55,925 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:11:55,947 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-28 10:11:55,947 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:55,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:56,917 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:56,939 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:56,939 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-09-28 10:11:56,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-28 10:11:56,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-28 10:11:56,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1959, Unknown=0, NotChecked=0, Total=2070 [2018-09-28 10:11:56,940 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 46 states. [2018-09-28 10:11:57,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:57,512 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-28 10:11:57,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-28 10:11:57,515 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 23 [2018-09-28 10:11:57,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:57,516 INFO L225 Difference]: With dead ends: 26 [2018-09-28 10:11:57,516 INFO L226 Difference]: Without dead ends: 25 [2018-09-28 10:11:57,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=1959, Unknown=0, NotChecked=0, Total=2070 [2018-09-28 10:11:57,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-28 10:11:57,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-28 10:11:57,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-28 10:11:57,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-28 10:11:57,521 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-28 10:11:57,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:57,521 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-28 10:11:57,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-28 10:11:57,521 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-28 10:11:57,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-28 10:11:57,522 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:57,522 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-09-28 10:11:57,522 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:57,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:57,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-09-28 10:11:57,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:57,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:57,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:57,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:57,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:57,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:58,446 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:58,447 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:58,447 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 [2018-09-28 10:11:58,455 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:11:58,470 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:11:58,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:58,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:59,374 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:59,395 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:59,395 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-09-28 10:11:59,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-28 10:11:59,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-28 10:11:59,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=2140, Unknown=0, NotChecked=0, Total=2256 [2018-09-28 10:11:59,397 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 48 states. [2018-09-28 10:12:00,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:00,102 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-28 10:12:00,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-28 10:12:00,103 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 24 [2018-09-28 10:12:00,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:00,103 INFO L225 Difference]: With dead ends: 27 [2018-09-28 10:12:00,104 INFO L226 Difference]: Without dead ends: 26 [2018-09-28 10:12:00,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=116, Invalid=2140, Unknown=0, NotChecked=0, Total=2256 [2018-09-28 10:12:00,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-28 10:12:00,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-28 10:12:00,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:12:00,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-28 10:12:00,109 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-28 10:12:00,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:00,109 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-28 10:12:00,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-28 10:12:00,109 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-28 10:12:00,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-28 10:12:00,110 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:00,110 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-09-28 10:12:00,110 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:00,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:00,110 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-09-28 10:12:00,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:00,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:00,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:00,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:00,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:00,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:00,303 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-28 10:12:00,804 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:00,804 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:00,804 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 [2018-09-28 10:12:00,812 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:12:00,830 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-28 10:12:00,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:00,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:01,854 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:01,875 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:01,875 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-09-28 10:12:01,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-28 10:12:01,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-28 10:12:01,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2329, Unknown=0, NotChecked=0, Total=2450 [2018-09-28 10:12:01,877 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 50 states. [2018-09-28 10:12:02,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:02,472 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-28 10:12:02,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-28 10:12:02,473 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 25 [2018-09-28 10:12:02,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:02,473 INFO L225 Difference]: With dead ends: 28 [2018-09-28 10:12:02,473 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 10:12:02,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=121, Invalid=2329, Unknown=0, NotChecked=0, Total=2450 [2018-09-28 10:12:02,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 10:12:02,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-28 10:12:02,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-28 10:12:02,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-28 10:12:02,478 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-28 10:12:02,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:02,478 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-28 10:12:02,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-28 10:12:02,478 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-28 10:12:02,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-28 10:12:02,479 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:02,479 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-09-28 10:12:02,479 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:02,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:02,479 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-09-28 10:12:02,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:02,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:02,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:02,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:02,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:02,661 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-28 10:12:03,406 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:03,406 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:03,406 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 [2018-09-28 10:12:03,413 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:12:03,433 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-28 10:12:03,434 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:03,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:04,862 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:04,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:04,881 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-09-28 10:12:04,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-28 10:12:04,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-28 10:12:04,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2526, Unknown=0, NotChecked=0, Total=2652 [2018-09-28 10:12:04,883 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 52 states. [2018-09-28 10:12:05,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:05,506 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-28 10:12:05,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-28 10:12:05,506 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 26 [2018-09-28 10:12:05,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:05,507 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:12:05,507 INFO L226 Difference]: Without dead ends: 28 [2018-09-28 10:12:05,509 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=126, Invalid=2526, Unknown=0, NotChecked=0, Total=2652 [2018-09-28 10:12:05,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-28 10:12:05,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-28 10:12:05,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:12:05,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-28 10:12:05,513 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-28 10:12:05,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:05,513 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-28 10:12:05,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-28 10:12:05,513 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-28 10:12:05,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-28 10:12:05,514 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:05,514 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-09-28 10:12:05,514 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:05,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:05,515 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-09-28 10:12:05,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:05,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:05,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:05,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:05,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:06,220 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:06,221 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:06,221 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:12:06,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:12:06,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:06,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:07,166 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:07,187 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:07,187 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-09-28 10:12:07,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-28 10:12:07,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-28 10:12:07,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2731, Unknown=0, NotChecked=0, Total=2862 [2018-09-28 10:12:07,189 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 54 states. [2018-09-28 10:12:07,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:07,779 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-28 10:12:07,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-28 10:12:07,780 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 27 [2018-09-28 10:12:07,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:07,780 INFO L225 Difference]: With dead ends: 30 [2018-09-28 10:12:07,781 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:12:07,782 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=131, Invalid=2731, Unknown=0, NotChecked=0, Total=2862 [2018-09-28 10:12:07,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:12:07,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-28 10:12:07,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-28 10:12:07,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-28 10:12:07,786 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-28 10:12:07,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:07,786 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-28 10:12:07,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-28 10:12:07,786 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-28 10:12:07,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-28 10:12:07,787 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:07,787 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-09-28 10:12:07,787 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:07,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:07,787 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-09-28 10:12:07,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:07,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:07,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:07,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:12:07,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:07,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:08,767 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:08,767 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:08,767 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:12:08,776 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:12:08,793 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:12:08,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:08,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:09,909 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:09,910 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-09-28 10:12:09,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-28 10:12:09,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-28 10:12:09,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2944, Unknown=0, NotChecked=0, Total=3080 [2018-09-28 10:12:09,912 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 56 states. [2018-09-28 10:12:10,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:10,549 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-28 10:12:10,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-28 10:12:10,549 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 28 [2018-09-28 10:12:10,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:10,550 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:12:10,550 INFO L226 Difference]: Without dead ends: 30 [2018-09-28 10:12:10,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=136, Invalid=2944, Unknown=0, NotChecked=0, Total=3080 [2018-09-28 10:12:10,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-28 10:12:10,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-28 10:12:10,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:12:10,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-28 10:12:10,555 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-28 10:12:10,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:10,555 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-28 10:12:10,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-28 10:12:10,555 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-28 10:12:10,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-28 10:12:10,556 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:10,556 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-09-28 10:12:10,556 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:10,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:10,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-09-28 10:12:10,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:10,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:10,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:10,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:10,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:10,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:10,720 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-28 10:12:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:11,316 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:11,316 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 [2018-09-28 10:12:11,324 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:12:11,347 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-28 10:12:11,347 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:11,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:12,436 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:12,456 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:12,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-09-28 10:12:12,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-28 10:12:12,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-28 10:12:12,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=3165, Unknown=0, NotChecked=0, Total=3306 [2018-09-28 10:12:12,458 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 58 states. [2018-09-28 10:12:13,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:13,209 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-28 10:12:13,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-28 10:12:13,209 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 29 [2018-09-28 10:12:13,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:13,210 INFO L225 Difference]: With dead ends: 32 [2018-09-28 10:12:13,210 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:12:13,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=141, Invalid=3165, Unknown=0, NotChecked=0, Total=3306 [2018-09-28 10:12:13,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:12:13,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-28 10:12:13,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-28 10:12:13,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-28 10:12:13,215 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-28 10:12:13,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:13,216 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-28 10:12:13,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-28 10:12:13,216 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-28 10:12:13,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-28 10:12:13,216 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:13,216 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-09-28 10:12:13,217 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:13,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:13,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-09-28 10:12:13,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:13,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:13,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:13,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:13,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:14,107 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:14,108 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:14,108 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 [2018-09-28 10:12:14,116 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:12:14,136 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:12:14,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:14,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:15,358 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:15,358 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-09-28 10:12:15,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-28 10:12:15,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-28 10:12:15,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=3394, Unknown=0, NotChecked=0, Total=3540 [2018-09-28 10:12:15,359 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 60 states. [2018-09-28 10:12:16,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:16,146 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-28 10:12:16,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-28 10:12:16,146 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 30 [2018-09-28 10:12:16,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:16,147 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:12:16,147 INFO L226 Difference]: Without dead ends: 32 [2018-09-28 10:12:16,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=146, Invalid=3394, Unknown=0, NotChecked=0, Total=3540 [2018-09-28 10:12:16,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-28 10:12:16,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-28 10:12:16,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:12:16,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-28 10:12:16,153 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-28 10:12:16,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:16,154 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-28 10:12:16,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-28 10:12:16,154 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-28 10:12:16,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-28 10:12:16,154 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:16,154 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-09-28 10:12:16,155 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:16,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:16,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-09-28 10:12:16,155 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:16,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:16,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:16,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:16,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:16,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:16,451 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-28 10:12:17,142 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:17,142 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:17,142 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:12:17,156 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:12:17,178 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-28 10:12:17,178 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:17,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:19,104 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:19,104 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-09-28 10:12:19,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-28 10:12:19,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-28 10:12:19,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=3631, Unknown=0, NotChecked=0, Total=3782 [2018-09-28 10:12:19,105 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 62 states. [2018-09-28 10:12:20,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:20,045 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-28 10:12:20,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-28 10:12:20,046 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 31 [2018-09-28 10:12:20,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:20,047 INFO L225 Difference]: With dead ends: 34 [2018-09-28 10:12:20,047 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:12:20,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=151, Invalid=3631, Unknown=0, NotChecked=0, Total=3782 [2018-09-28 10:12:20,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:12:20,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-28 10:12:20,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-28 10:12:20,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-28 10:12:20,052 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-28 10:12:20,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:20,052 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-28 10:12:20,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-28 10:12:20,052 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-28 10:12:20,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-28 10:12:20,053 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:20,053 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-09-28 10:12:20,053 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:20,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:20,054 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-09-28 10:12:20,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:20,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:20,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:20,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:20,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:20,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:20,844 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:20,844 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:12:20,851 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:12:20,875 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-28 10:12:20,875 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:20,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:22,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:22,229 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-09-28 10:12:22,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-28 10:12:22,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-28 10:12:22,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=3876, Unknown=0, NotChecked=0, Total=4032 [2018-09-28 10:12:22,230 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 64 states. [2018-09-28 10:12:23,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:23,386 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-28 10:12:23,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-28 10:12:23,387 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 32 [2018-09-28 10:12:23,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:23,388 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:12:23,388 INFO L226 Difference]: Without dead ends: 34 [2018-09-28 10:12:23,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=156, Invalid=3876, Unknown=0, NotChecked=0, Total=4032 [2018-09-28 10:12:23,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-28 10:12:23,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-28 10:12:23,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:12:23,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-28 10:12:23,392 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-28 10:12:23,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:23,394 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-28 10:12:23,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-28 10:12:23,394 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-28 10:12:23,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-28 10:12:23,395 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:23,395 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-09-28 10:12:23,395 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:23,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:23,395 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-09-28 10:12:23,395 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:23,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:23,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:23,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:23,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:23,626 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-28 10:12:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:24,601 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:24,601 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:12:24,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:12:24,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:24,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:25,934 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:25,955 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:25,955 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-09-28 10:12:25,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-28 10:12:25,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-28 10:12:25,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=4129, Unknown=0, NotChecked=0, Total=4290 [2018-09-28 10:12:25,956 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 66 states. [2018-09-28 10:12:27,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:27,391 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-28 10:12:27,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-28 10:12:27,392 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 33 [2018-09-28 10:12:27,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:27,392 INFO L225 Difference]: With dead ends: 36 [2018-09-28 10:12:27,393 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:12:27,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=161, Invalid=4129, Unknown=0, NotChecked=0, Total=4290 [2018-09-28 10:12:27,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:12:27,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-28 10:12:27,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-28 10:12:27,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-28 10:12:27,398 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-28 10:12:27,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:27,399 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-28 10:12:27,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-28 10:12:27,399 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-28 10:12:27,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-28 10:12:27,399 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:27,399 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-09-28 10:12:27,400 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:27,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:27,400 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-09-28 10:12:27,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:27,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:27,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:27,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:12:27,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:28,319 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:28,319 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:12:28,327 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:12:28,359 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:12:28,359 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:28,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:30,075 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:30,095 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:30,095 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-09-28 10:12:30,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-28 10:12:30,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-28 10:12:30,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=4390, Unknown=0, NotChecked=0, Total=4556 [2018-09-28 10:12:30,096 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 68 states. [2018-09-28 10:12:31,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:31,230 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-28 10:12:31,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-28 10:12:31,230 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 34 [2018-09-28 10:12:31,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:31,231 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:12:31,231 INFO L226 Difference]: Without dead ends: 36 [2018-09-28 10:12:31,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=166, Invalid=4390, Unknown=0, NotChecked=0, Total=4556 [2018-09-28 10:12:31,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-28 10:12:31,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-28 10:12:31,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-28 10:12:31,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-28 10:12:31,236 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-28 10:12:31,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:31,237 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-28 10:12:31,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-28 10:12:31,237 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-28 10:12:31,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-28 10:12:31,237 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:31,237 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-09-28 10:12:31,238 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:31,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:31,238 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-09-28 10:12:31,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:31,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:31,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:31,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:31,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:32,189 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:32,189 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:32,189 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:12:32,197 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:12:32,235 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-28 10:12:32,235 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:32,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:33,730 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:33,750 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:33,751 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-09-28 10:12:33,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-28 10:12:33,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-28 10:12:33,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=4659, Unknown=0, NotChecked=0, Total=4830 [2018-09-28 10:12:33,752 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 70 states. [2018-09-28 10:12:35,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:35,195 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-28 10:12:35,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-28 10:12:35,196 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 35 [2018-09-28 10:12:35,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:35,197 INFO L225 Difference]: With dead ends: 38 [2018-09-28 10:12:35,197 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:12:35,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=171, Invalid=4659, Unknown=0, NotChecked=0, Total=4830 [2018-09-28 10:12:35,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:12:35,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-28 10:12:35,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-28 10:12:35,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-28 10:12:35,202 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-28 10:12:35,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:35,203 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-28 10:12:35,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-28 10:12:35,203 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-28 10:12:35,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-28 10:12:35,203 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:35,203 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-09-28 10:12:35,204 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:35,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:35,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-09-28 10:12:35,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:35,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:35,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:35,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:35,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:35,551 WARN L178 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-28 10:12:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:36,620 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:36,621 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:12:36,629 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:12:36,650 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:12:36,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:36,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:38,228 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:38,228 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-09-28 10:12:38,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-28 10:12:38,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-28 10:12:38,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=4936, Unknown=0, NotChecked=0, Total=5112 [2018-09-28 10:12:38,229 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 72 states. [2018-09-28 10:12:39,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:39,883 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-28 10:12:39,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-28 10:12:39,883 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 36 [2018-09-28 10:12:39,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:39,884 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:12:39,884 INFO L226 Difference]: Without dead ends: 38 [2018-09-28 10:12:39,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=176, Invalid=4936, Unknown=0, NotChecked=0, Total=5112 [2018-09-28 10:12:39,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-28 10:12:39,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-28 10:12:39,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-28 10:12:39,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-28 10:12:39,887 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-28 10:12:39,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:39,888 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-28 10:12:39,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-28 10:12:39,888 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-28 10:12:39,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-28 10:12:39,888 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:39,888 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-09-28 10:12:39,888 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:39,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:39,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-09-28 10:12:39,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:39,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:39,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:39,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:39,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:39,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:40,045 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-28 10:12:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:40,972 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:40,972 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:12:40,979 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:12:41,010 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-28 10:12:41,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:41,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:42,766 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:42,786 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:42,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-09-28 10:12:42,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-28 10:12:42,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-28 10:12:42,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=5221, Unknown=0, NotChecked=0, Total=5402 [2018-09-28 10:12:42,787 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 74 states. [2018-09-28 10:12:44,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:44,439 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-28 10:12:44,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-28 10:12:44,439 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 37 [2018-09-28 10:12:44,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:44,440 INFO L225 Difference]: With dead ends: 40 [2018-09-28 10:12:44,440 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:12:44,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=181, Invalid=5221, Unknown=0, NotChecked=0, Total=5402 [2018-09-28 10:12:44,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:12:44,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-28 10:12:44,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-28 10:12:44,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-28 10:12:44,443 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-28 10:12:44,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:44,444 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-28 10:12:44,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-28 10:12:44,444 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-28 10:12:44,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-28 10:12:44,444 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:44,445 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-09-28 10:12:44,445 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:44,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:44,445 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-09-28 10:12:44,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:44,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:44,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:44,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:44,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:44,734 WARN L178 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-28 10:12:45,734 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:45,734 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:45,734 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:12:45,742 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:12:45,771 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-28 10:12:45,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:45,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:47,525 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:47,545 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:47,545 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-09-28 10:12:47,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-28 10:12:47,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-28 10:12:47,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=5514, Unknown=0, NotChecked=0, Total=5700 [2018-09-28 10:12:47,546 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 76 states. [2018-09-28 10:12:48,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:48,813 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-28 10:12:48,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-28 10:12:48,814 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 38 [2018-09-28 10:12:48,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:48,814 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:12:48,814 INFO L226 Difference]: Without dead ends: 40 [2018-09-28 10:12:48,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=186, Invalid=5514, Unknown=0, NotChecked=0, Total=5700 [2018-09-28 10:12:48,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-28 10:12:48,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-28 10:12:48,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-28 10:12:48,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-28 10:12:48,818 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-28 10:12:48,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:48,818 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-28 10:12:48,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-28 10:12:48,819 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-28 10:12:48,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-28 10:12:48,819 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:48,819 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-09-28 10:12:48,819 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:48,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:48,820 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-09-28 10:12:48,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:48,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:48,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:48,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:48,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:48,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:50,130 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:50,131 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:50,131 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:12:50,140 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:12:50,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:50,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:52,022 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:52,042 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:52,042 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-09-28 10:12:52,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-28 10:12:52,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-28 10:12:52,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=5815, Unknown=0, NotChecked=0, Total=6006 [2018-09-28 10:12:52,043 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 78 states. [2018-09-28 10:12:54,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:54,191 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-28 10:12:54,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-28 10:12:54,191 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 39 [2018-09-28 10:12:54,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:54,192 INFO L225 Difference]: With dead ends: 42 [2018-09-28 10:12:54,192 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:12:54,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=191, Invalid=5815, Unknown=0, NotChecked=0, Total=6006 [2018-09-28 10:12:54,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:12:54,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-28 10:12:54,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-28 10:12:54,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-28 10:12:54,196 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-28 10:12:54,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:54,196 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-28 10:12:54,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-28 10:12:54,196 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-28 10:12:54,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-28 10:12:54,196 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:54,196 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-09-28 10:12:54,197 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:54,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:54,197 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-09-28 10:12:54,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:54,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:54,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:54,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:12:54,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:54,361 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-28 10:12:55,600 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:55,600 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:55,600 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:12:55,607 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:12:55,631 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:12:55,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:55,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:57,565 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:57,585 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:57,586 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-09-28 10:12:57,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-28 10:12:57,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-28 10:12:57,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=6124, Unknown=0, NotChecked=0, Total=6320 [2018-09-28 10:12:57,587 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 80 states. [2018-09-28 10:12:59,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:59,390 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-28 10:12:59,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-28 10:12:59,390 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 40 [2018-09-28 10:12:59,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:59,391 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:12:59,391 INFO L226 Difference]: Without dead ends: 42 [2018-09-28 10:12:59,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=196, Invalid=6124, Unknown=0, NotChecked=0, Total=6320 [2018-09-28 10:12:59,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-28 10:12:59,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-28 10:12:59,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-28 10:12:59,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-28 10:12:59,394 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-28 10:12:59,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:59,394 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-28 10:12:59,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-28 10:12:59,395 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-28 10:12:59,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-28 10:12:59,395 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:59,395 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-09-28 10:12:59,395 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:59,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:59,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-09-28 10:12:59,395 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:59,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:59,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:59,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:59,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:59,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:59,732 WARN L178 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-28 10:12:59,922 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-28 10:13:00,120 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-28 10:13:00,338 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-28 10:13:00,589 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-28 10:13:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:01,645 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:01,645 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:01,652 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:13:01,685 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-28 10:13:01,685 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:01,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:03,750 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:03,750 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-09-28 10:13:03,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-28 10:13:03,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-28 10:13:03,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=6441, Unknown=0, NotChecked=0, Total=6642 [2018-09-28 10:13:03,751 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 82 states. [2018-09-28 10:13:05,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:05,576 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-28 10:13:05,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-28 10:13:05,577 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 41 [2018-09-28 10:13:05,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:05,578 INFO L225 Difference]: With dead ends: 44 [2018-09-28 10:13:05,578 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:13:05,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=201, Invalid=6441, Unknown=0, NotChecked=0, Total=6642 [2018-09-28 10:13:05,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:13:05,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-28 10:13:05,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-28 10:13:05,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-28 10:13:05,582 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-28 10:13:05,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:05,582 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-28 10:13:05,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-28 10:13:05,582 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-28 10:13:05,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-28 10:13:05,583 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:05,583 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-09-28 10:13:05,583 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:05,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:05,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-09-28 10:13:05,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:05,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:05,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:05,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:05,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:05,915 WARN L178 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-28 10:13:07,088 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:07,088 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:07,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:07,095 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:13:07,119 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:13:07,119 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:07,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:09,363 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:09,383 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:09,383 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-09-28 10:13:09,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-28 10:13:09,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-28 10:13:09,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=6766, Unknown=0, NotChecked=0, Total=6972 [2018-09-28 10:13:09,384 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 84 states. [2018-09-28 10:13:11,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:11,161 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-28 10:13:11,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-28 10:13:11,161 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 42 [2018-09-28 10:13:11,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:11,162 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:13:11,162 INFO L226 Difference]: Without dead ends: 44 [2018-09-28 10:13:11,163 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=206, Invalid=6766, Unknown=0, NotChecked=0, Total=6972 [2018-09-28 10:13:11,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-28 10:13:11,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-28 10:13:11,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-28 10:13:11,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-28 10:13:11,166 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-28 10:13:11,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:11,166 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-28 10:13:11,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-28 10:13:11,167 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-28 10:13:11,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-28 10:13:11,167 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:11,167 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-09-28 10:13:11,167 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:11,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:11,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-09-28 10:13:11,167 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:11,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:11,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:11,168 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:11,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:11,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:12,516 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:12,516 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:12,524 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:13:12,633 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-28 10:13:12,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:12,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:15,098 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:15,119 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:15,119 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-09-28 10:13:15,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-28 10:13:15,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-28 10:13:15,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=7099, Unknown=0, NotChecked=0, Total=7310 [2018-09-28 10:13:15,120 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 86 states. [2018-09-28 10:13:16,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:16,822 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-28 10:13:16,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-28 10:13:16,822 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 43 [2018-09-28 10:13:16,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:16,823 INFO L225 Difference]: With dead ends: 46 [2018-09-28 10:13:16,823 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:13:16,824 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=211, Invalid=7099, Unknown=0, NotChecked=0, Total=7310 [2018-09-28 10:13:16,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:13:16,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-28 10:13:16,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-28 10:13:16,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-28 10:13:16,828 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-28 10:13:16,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:16,828 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-28 10:13:16,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-28 10:13:16,828 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-28 10:13:16,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-28 10:13:16,828 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:16,829 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-09-28 10:13:16,829 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:16,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:16,829 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-09-28 10:13:16,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:16,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:16,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:16,830 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:16,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:16,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:17,176 WARN L178 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-28 10:13:17,361 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-28 10:13:17,546 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-28 10:13:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:18,893 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:18,893 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:18,901 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:13:18,934 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-28 10:13:18,934 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:18,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:21,536 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:21,557 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:21,557 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-09-28 10:13:21,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-28 10:13:21,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-28 10:13:21,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=7440, Unknown=0, NotChecked=0, Total=7656 [2018-09-28 10:13:21,558 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 88 states. [2018-09-28 10:13:23,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:23,381 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-28 10:13:23,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-28 10:13:23,382 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 44 [2018-09-28 10:13:23,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:23,382 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:13:23,382 INFO L226 Difference]: Without dead ends: 46 [2018-09-28 10:13:23,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=216, Invalid=7440, Unknown=0, NotChecked=0, Total=7656 [2018-09-28 10:13:23,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-28 10:13:23,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-28 10:13:23,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-28 10:13:23,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-28 10:13:23,387 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-28 10:13:23,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:23,387 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-28 10:13:23,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-28 10:13:23,388 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-28 10:13:23,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-28 10:13:23,388 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:23,388 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-09-28 10:13:23,388 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:23,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:23,388 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-09-28 10:13:23,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:23,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:23,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:23,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:23,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:24,788 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:24,788 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:24,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:24,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:24,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:27,481 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:27,502 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:27,502 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-09-28 10:13:27,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-28 10:13:27,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-28 10:13:27,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=7789, Unknown=0, NotChecked=0, Total=8010 [2018-09-28 10:13:27,503 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 90 states. [2018-09-28 10:13:29,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:29,512 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-28 10:13:29,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-28 10:13:29,512 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 45 [2018-09-28 10:13:29,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:29,513 INFO L225 Difference]: With dead ends: 48 [2018-09-28 10:13:29,513 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:13:29,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=221, Invalid=7789, Unknown=0, NotChecked=0, Total=8010 [2018-09-28 10:13:29,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:13:29,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-28 10:13:29,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-28 10:13:29,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-28 10:13:29,517 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-28 10:13:29,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:29,518 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-28 10:13:29,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-28 10:13:29,518 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-28 10:13:29,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-28 10:13:29,518 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:29,518 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1] [2018-09-28 10:13:29,519 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:29,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:29,519 INFO L82 PathProgramCache]: Analyzing trace with hash 667835207, now seen corresponding path program 44 times [2018-09-28 10:13:29,519 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:29,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:29,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:29,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:29,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:29,870 WARN L178 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-28 10:13:30,073 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-28 10:13:30,283 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-28 10:13:30,500 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-28 10:13:31,813 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:31,814 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:31,814 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:31,820 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:13:31,849 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:13:31,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:31,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:34,446 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:34,466 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:34,466 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-09-28 10:13:34,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-28 10:13:34,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-28 10:13:34,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=8146, Unknown=0, NotChecked=0, Total=8372 [2018-09-28 10:13:34,467 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 92 states. [2018-09-28 10:13:37,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:37,097 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-28 10:13:37,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-28 10:13:37,098 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 46 [2018-09-28 10:13:37,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:37,098 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:13:37,099 INFO L226 Difference]: Without dead ends: 48 [2018-09-28 10:13:37,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=226, Invalid=8146, Unknown=0, NotChecked=0, Total=8372 [2018-09-28 10:13:37,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-28 10:13:37,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-28 10:13:37,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-28 10:13:37,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-28 10:13:37,104 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-28 10:13:37,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:37,104 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-28 10:13:37,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-28 10:13:37,104 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-28 10:13:37,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-28 10:13:37,105 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:37,105 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1] [2018-09-28 10:13:37,105 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:37,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:37,105 INFO L82 PathProgramCache]: Analyzing trace with hash -771945119, now seen corresponding path program 45 times [2018-09-28 10:13:37,105 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:37,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:37,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:37,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:37,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:38,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:38,642 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:38,642 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:38,650 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:13:38,688 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-28 10:13:38,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:38,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:41,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:41,651 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:41,651 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-09-28 10:13:41,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-28 10:13:41,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-28 10:13:41,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=8511, Unknown=0, NotChecked=0, Total=8742 [2018-09-28 10:13:41,652 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 94 states. [2018-09-28 10:13:44,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:44,425 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-28 10:13:44,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-28 10:13:44,426 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 47 [2018-09-28 10:13:44,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:44,427 INFO L225 Difference]: With dead ends: 50 [2018-09-28 10:13:44,427 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:13:44,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=231, Invalid=8511, Unknown=0, NotChecked=0, Total=8742 [2018-09-28 10:13:44,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:13:44,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-28 10:13:44,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-28 10:13:44,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-28 10:13:44,431 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-28 10:13:44,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:44,431 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-28 10:13:44,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-28 10:13:44,431 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-28 10:13:44,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-28 10:13:44,431 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:44,431 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1] [2018-09-28 10:13:44,432 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:44,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:44,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505031, now seen corresponding path program 46 times [2018-09-28 10:13:44,432 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:44,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:44,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:44,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:44,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:44,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:46,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:46,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:46,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:46,344 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:13:46,375 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:13:46,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:46,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:49,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:49,197 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:49,198 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-09-28 10:13:49,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-28 10:13:49,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-28 10:13:49,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=8884, Unknown=0, NotChecked=0, Total=9120 [2018-09-28 10:13:49,199 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 96 states. [2018-09-28 10:13:51,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:51,221 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-28 10:13:51,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-28 10:13:51,221 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 48 [2018-09-28 10:13:51,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:51,222 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:13:51,222 INFO L226 Difference]: Without dead ends: 50 [2018-09-28 10:13:51,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=236, Invalid=8884, Unknown=0, NotChecked=0, Total=9120 [2018-09-28 10:13:51,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-28 10:13:51,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-28 10:13:51,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-28 10:13:51,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-28 10:13:51,227 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-28 10:13:51,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:51,227 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-28 10:13:51,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-28 10:13:51,227 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-28 10:13:51,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-28 10:13:51,228 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:51,228 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1] [2018-09-28 10:13:51,228 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:51,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:51,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081057, now seen corresponding path program 47 times [2018-09-28 10:13:51,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:51,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:51,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:51,229 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:51,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:51,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:51,570 WARN L178 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-28 10:13:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:53,137 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:53,137 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:53,144 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:13:53,179 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-28 10:13:53,179 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:53,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:56,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:56,356 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:56,357 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-09-28 10:13:56,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-28 10:13:56,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-28 10:13:56,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=9265, Unknown=0, NotChecked=0, Total=9506 [2018-09-28 10:13:56,358 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 98 states. [2018-09-28 10:13:59,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:59,167 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-28 10:13:59,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-28 10:13:59,168 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 49 [2018-09-28 10:13:59,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:59,168 INFO L225 Difference]: With dead ends: 52 [2018-09-28 10:13:59,168 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:13:59,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=241, Invalid=9265, Unknown=0, NotChecked=0, Total=9506 [2018-09-28 10:13:59,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:13:59,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-28 10:13:59,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-28 10:13:59,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-28 10:13:59,174 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-28 10:13:59,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:59,174 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-28 10:13:59,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-28 10:13:59,174 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-28 10:13:59,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-28 10:13:59,174 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:59,174 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1] [2018-09-28 10:13:59,174 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:59,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:59,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192953, now seen corresponding path program 48 times [2018-09-28 10:13:59,175 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:59,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:59,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:59,175 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:59,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:59,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:01,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:01,024 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:01,024 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:01,031 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:14:01,077 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-28 10:14:01,077 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:01,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:04,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:04,093 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:04,093 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-09-28 10:14:04,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-28 10:14:04,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-28 10:14:04,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=9654, Unknown=0, NotChecked=0, Total=9900 [2018-09-28 10:14:04,094 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 100 states. [2018-09-28 10:14:06,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:06,947 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-28 10:14:06,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-28 10:14:06,947 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 50 [2018-09-28 10:14:06,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:06,948 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:14:06,948 INFO L226 Difference]: Without dead ends: 52 [2018-09-28 10:14:06,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=246, Invalid=9654, Unknown=0, NotChecked=0, Total=9900 [2018-09-28 10:14:06,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-28 10:14:06,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-28 10:14:06,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-28 10:14:06,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-28 10:14:06,954 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-28 10:14:06,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:06,954 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-28 10:14:06,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-28 10:14:06,954 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-28 10:14:06,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-28 10:14:06,955 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:06,955 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1] [2018-09-28 10:14:06,955 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:06,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:06,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593249, now seen corresponding path program 49 times [2018-09-28 10:14:06,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:06,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:06,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:06,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:06,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:06,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:07,278 WARN L178 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-28 10:14:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:09,016 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:09,016 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:09,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:09,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:09,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:12,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:12,502 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:12,503 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-09-28 10:14:12,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-28 10:14:12,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-28 10:14:12,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=10051, Unknown=0, NotChecked=0, Total=10302 [2018-09-28 10:14:12,504 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 102 states. [2018-09-28 10:14:14,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:14,860 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-28 10:14:14,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-28 10:14:14,861 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 51 [2018-09-28 10:14:14,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:14,862 INFO L225 Difference]: With dead ends: 54 [2018-09-28 10:14:14,862 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:14:14,863 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=251, Invalid=10051, Unknown=0, NotChecked=0, Total=10302 [2018-09-28 10:14:14,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:14:14,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-28 10:14:14,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-28 10:14:14,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-28 10:14:14,866 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-28 10:14:14,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:14,867 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-28 10:14:14,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-28 10:14:14,867 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-28 10:14:14,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-28 10:14:14,867 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:14,867 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1] [2018-09-28 10:14:14,868 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:14,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:14,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1250315001, now seen corresponding path program 50 times [2018-09-28 10:14:14,868 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:14,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:14,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:14,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:14,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:14,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:15,111 WARN L178 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-28 10:14:17,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:17,070 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:17,071 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:17,079 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:14:17,120 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:14:17,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:17,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:20,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:20,502 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:20,502 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-09-28 10:14:20,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-28 10:14:20,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-28 10:14:20,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=10456, Unknown=0, NotChecked=0, Total=10712 [2018-09-28 10:14:20,504 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 104 states. [2018-09-28 10:14:22,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:22,602 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-28 10:14:22,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-28 10:14:22,602 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 52 [2018-09-28 10:14:22,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:22,603 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:14:22,603 INFO L226 Difference]: Without dead ends: 54 [2018-09-28 10:14:22,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=256, Invalid=10456, Unknown=0, NotChecked=0, Total=10712 [2018-09-28 10:14:22,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-28 10:14:22,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-28 10:14:22,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-28 10:14:22,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-28 10:14:22,608 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-28 10:14:22,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:22,608 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-28 10:14:22,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-28 10:14:22,608 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-28 10:14:22,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-28 10:14:22,609 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:22,609 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1] [2018-09-28 10:14:22,609 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:22,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:22,609 INFO L82 PathProgramCache]: Analyzing trace with hash -105059423, now seen corresponding path program 51 times [2018-09-28 10:14:22,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:22,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:22,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:22,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:22,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:24,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:24,571 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:24,571 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:24,580 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:14:24,670 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-28 10:14:24,670 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:24,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:28,411 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:28,411 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-09-28 10:14:28,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-28 10:14:28,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-28 10:14:28,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=10869, Unknown=0, NotChecked=0, Total=11130 [2018-09-28 10:14:28,412 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 106 states. [2018-09-28 10:14:32,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:32,046 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-28 10:14:32,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-28 10:14:32,046 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 53 [2018-09-28 10:14:32,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:32,047 INFO L225 Difference]: With dead ends: 56 [2018-09-28 10:14:32,047 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:14:32,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=261, Invalid=10869, Unknown=0, NotChecked=0, Total=11130 [2018-09-28 10:14:32,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:14:32,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-28 10:14:32,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-28 10:14:32,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-28 10:14:32,052 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-28 10:14:32,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:32,052 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-28 10:14:32,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-28 10:14:32,052 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-28 10:14:32,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-28 10:14:32,053 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:32,053 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1] [2018-09-28 10:14:32,053 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:32,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:32,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125127, now seen corresponding path program 52 times [2018-09-28 10:14:32,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:32,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:32,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:32,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:32,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:33,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:33,987 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:33,987 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:33,994 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:14:34,028 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:14:34,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:34,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:37,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:37,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:37,889 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-09-28 10:14:37,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-28 10:14:37,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-28 10:14:37,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=11290, Unknown=0, NotChecked=0, Total=11556 [2018-09-28 10:14:37,890 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 108 states. [2018-09-28 10:14:41,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:41,994 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-28 10:14:41,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-28 10:14:41,994 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 54 [2018-09-28 10:14:41,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:41,995 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:14:41,995 INFO L226 Difference]: Without dead ends: 56 [2018-09-28 10:14:41,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=266, Invalid=11290, Unknown=0, NotChecked=0, Total=11556 [2018-09-28 10:14:41,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-28 10:14:41,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-28 10:14:41,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-28 10:14:41,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-28 10:14:41,998 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-28 10:14:41,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:41,999 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-28 10:14:41,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-28 10:14:41,999 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-28 10:14:41,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-28 10:14:41,999 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:41,999 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1] [2018-09-28 10:14:41,999 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:41,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:42,000 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107809, now seen corresponding path program 53 times [2018-09-28 10:14:42,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:42,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:42,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:42,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:42,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:42,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:43,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:43,971 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:43,971 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:43,978 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:14:44,027 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-28 10:14:44,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:44,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:48,004 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:48,004 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-09-28 10:14:48,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-28 10:14:48,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-28 10:14:48,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=11719, Unknown=0, NotChecked=0, Total=11990 [2018-09-28 10:14:48,005 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 110 states. [2018-09-28 10:14:51,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:51,965 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-28 10:14:51,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-28 10:14:51,965 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 55 [2018-09-28 10:14:51,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:51,966 INFO L225 Difference]: With dead ends: 58 [2018-09-28 10:14:51,966 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:14:51,966 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=271, Invalid=11719, Unknown=0, NotChecked=0, Total=11990 [2018-09-28 10:14:51,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:14:51,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-28 10:14:51,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-28 10:14:51,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-28 10:14:51,970 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-28 10:14:51,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:51,970 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-28 10:14:51,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-28 10:14:51,970 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-28 10:14:51,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-28 10:14:51,971 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:51,971 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1] [2018-09-28 10:14:51,971 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:51,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:51,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832583, now seen corresponding path program 54 times [2018-09-28 10:14:51,972 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:51,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:51,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:51,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:51,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:52,142 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-28 10:14:54,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:54,194 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:54,194 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:54,202 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:14:54,246 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-28 10:14:54,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:54,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:58,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:58,261 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:58,261 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-09-28 10:14:58,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-28 10:14:58,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-28 10:14:58,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=12156, Unknown=0, NotChecked=0, Total=12432 [2018-09-28 10:14:58,262 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 112 states. [2018-09-28 10:15:02,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:02,184 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-28 10:15:02,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-28 10:15:02,184 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 56 [2018-09-28 10:15:02,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:02,185 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:15:02,185 INFO L226 Difference]: Without dead ends: 58 [2018-09-28 10:15:02,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=276, Invalid=12156, Unknown=0, NotChecked=0, Total=12432 [2018-09-28 10:15:02,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-28 10:15:02,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-28 10:15:02,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-28 10:15:02,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-28 10:15:02,190 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-28 10:15:02,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:02,190 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-28 10:15:02,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-28 10:15:02,190 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-28 10:15:02,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-28 10:15:02,190 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:02,191 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1] [2018-09-28 10:15:02,191 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:02,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:02,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895647, now seen corresponding path program 55 times [2018-09-28 10:15:02,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:02,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:02,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:02,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:02,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:02,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:02,386 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-28 10:15:04,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:04,507 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:04,507 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:04,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:04,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:08,694 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:08,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-09-28 10:15:08,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-28 10:15:08,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-28 10:15:08,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=12601, Unknown=0, NotChecked=0, Total=12882 [2018-09-28 10:15:08,695 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 114 states. [2018-09-28 10:15:12,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:12,806 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-28 10:15:12,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-28 10:15:12,806 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 57 [2018-09-28 10:15:12,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:12,807 INFO L225 Difference]: With dead ends: 60 [2018-09-28 10:15:12,807 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:15:12,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=281, Invalid=12601, Unknown=0, NotChecked=0, Total=12882 [2018-09-28 10:15:12,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:15:12,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-28 10:15:12,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-28 10:15:12,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-28 10:15:12,812 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-28 10:15:12,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:12,812 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-28 10:15:12,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-28 10:15:12,812 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-28 10:15:12,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-28 10:15:12,812 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:12,812 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1] [2018-09-28 10:15:12,813 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:12,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:12,813 INFO L82 PathProgramCache]: Analyzing trace with hash -836059449, now seen corresponding path program 56 times [2018-09-28 10:15:12,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:12,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:12,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:12,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:12,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:13,142 WARN L178 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-28 10:15:15,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:15,225 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:15,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:15,234 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:15,268 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:15,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:15,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:19,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:19,717 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:19,717 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-09-28 10:15:19,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-28 10:15:19,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-28 10:15:19,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=13054, Unknown=0, NotChecked=0, Total=13340 [2018-09-28 10:15:19,718 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 116 states. [2018-09-28 10:15:24,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:24,034 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-28 10:15:24,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-28 10:15:24,034 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 58 [2018-09-28 10:15:24,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:24,035 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:15:24,035 INFO L226 Difference]: Without dead ends: 60 [2018-09-28 10:15:24,036 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=286, Invalid=13054, Unknown=0, NotChecked=0, Total=13340 [2018-09-28 10:15:24,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-28 10:15:24,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-28 10:15:24,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-28 10:15:24,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-28 10:15:24,039 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-28 10:15:24,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:24,039 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-28 10:15:24,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-28 10:15:24,039 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-28 10:15:24,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-28 10:15:24,040 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:24,040 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1] [2018-09-28 10:15:24,040 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:24,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:24,040 INFO L82 PathProgramCache]: Analyzing trace with hash -148039199, now seen corresponding path program 57 times [2018-09-28 10:15:24,040 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:24,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:24,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:24,041 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:24,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:26,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:26,230 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:26,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:26,237 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:26,284 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-28 10:15:26,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:26,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:30,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:30,703 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:30,703 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-09-28 10:15:30,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-28 10:15:30,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-28 10:15:30,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=13515, Unknown=0, NotChecked=0, Total=13806 [2018-09-28 10:15:30,704 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 118 states. [2018-09-28 10:15:35,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:35,332 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-28 10:15:35,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-28 10:15:35,332 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 59 [2018-09-28 10:15:35,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:35,333 INFO L225 Difference]: With dead ends: 62 [2018-09-28 10:15:35,333 INFO L226 Difference]: Without dead ends: 61 [2018-09-28 10:15:35,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=291, Invalid=13515, Unknown=0, NotChecked=0, Total=13806 [2018-09-28 10:15:35,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-28 10:15:35,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-28 10:15:35,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-28 10:15:35,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-28 10:15:35,339 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-28 10:15:35,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:35,339 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-28 10:15:35,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-28 10:15:35,339 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-28 10:15:35,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-28 10:15:35,339 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:35,340 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1] [2018-09-28 10:15:35,340 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:35,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:35,340 INFO L82 PathProgramCache]: Analyzing trace with hash -294247929, now seen corresponding path program 58 times [2018-09-28 10:15:35,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:35,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:35,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:35,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:35,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:36,429 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-28 10:15:38,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:38,298 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:38,299 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:38,316 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:38,351 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:38,351 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:38,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-09-28 10:15:39,483 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-28 10:15:39,684 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:39,684 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-28 10:15:39,689 WARN L206 ceAbstractionStarter]: Timeout [2018-09-28 10:15:39,689 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.09 10:15:39 BoogieIcfgContainer [2018-09-28 10:15:39,689 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-28 10:15:39,690 INFO L168 Benchmark]: Toolchain (without parser) took 249159.70 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -137.9 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 269.7 MB). Peak memory consumption was 131.8 MB. Max. memory is 7.1 GB. [2018-09-28 10:15:39,691 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:15:39,691 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.86 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:15:39,691 INFO L168 Benchmark]: Boogie Preprocessor took 24.29 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:15:39,692 INFO L168 Benchmark]: RCFGBuilder took 290.49 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-28 10:15:39,692 INFO L168 Benchmark]: TraceAbstraction took 248794.03 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -137.9 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 248.5 MB). Peak memory consumption was 110.7 MB. Max. memory is 7.1 GB. [2018-09-28 10:15:39,694 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.86 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.29 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 290.49 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 248794.03 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -137.9 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 248.5 MB). Peak memory consumption was 110.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 18]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 18). Cancelled while BasicCegarLoop was analyzing trace of length 61 with TraceHistMax 58, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 71 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. TIMEOUT Result, 248.7s OverallTime, 59 OverallIterations, 58 TraceHistogramMax, 81.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 117 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 106860 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 68.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3421 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3421 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32509 ImplicationChecksByTransitivity, 155.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=58, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 58 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 158.0s InterpolantComputationTime, 3536 NumberOfCodeBlocks, 3536 NumberOfCodeBlocksAsserted, 559 NumberOfCheckSat, 3421 ConstructedInterpolants, 0 QuantifiedInterpolants, 1724450 SizeOfPredicates, 0 NumberOfNonLiveVariables, 7011 ConjunctsInSsa, 6840 ConjunctsInUnsatCore, 115 InterpolantComputations, 1 PerfectInterpolantSequences, 0/65018 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-28_10-15-39-707.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-28_10-15-39-707.csv Completed graceful shutdown